SECURITIES PURCHASE AGREEMENT

                                  BETWEEN

                       TRIBUNE COMPANY, AS PURCHASER

                                    AND

                   SOFTKEY INTERNATIONAL, INC., AS ISSUER

                       DATED AS OF NOVEMBER 30, 1995

             51/2% SENIOR CONVERTIBLE/EXCHANGEABLE NOTES DUE 2000

                       $150,000,000 PRINCIPAL AMOUNT



                             TABLE OF CONTENTS

                                                                  PAGE

     ARTICLE I. AUTHORIZATION AND SALE OF NOTES  . . . . . . . .    1 
          Section 1.1.  Authorization  . . . . . . . . . . . . .    1 
          Section 1.2.  Issuance and Sale of Notes . . . . . . .    1 

     ARTICLE II. CLOSING . . . . . . . . . . . . . . . . . . . .    1 
          Section 2.1.  Closing Date . . . . . . . . . . . . . .    1 
          Section 2.2.  Further Assurances . . . . . . . . . . .    2 

     ARTICLE III. REPRESENTATIONS AND WARRANTIES OF THE COMPANY     2 
          Section 3.1.  SEC Reports  . . . . . . . . . . . . . .    3 
          Section 3.2.  Accountants  . . . . . . . . . . . . . .    3 
          Section 3.3.  Financial Statements . . . . . . . . . .    3 
          Section 3.4.  Absence of Certain Changes . . . . . . .    4 
          Section 3.5.  Authority  . . . . . . . . . . . . . . .    4 
          Section 3.6.  Non-Contravention  . . . . . . . . . . .    4 
          Section 3.7.  Capitalization . . . . . . . . . . . . .    5 
          Section 3.8.  Subsidiaries . . . . . . . . . . . . . .    5 
          Section 3.9.  Actions  . . . . . . . . . . . . . . . .    6 
          Section 3.10. Investment Company Act . . . . . . . . .    7 
          Section 3.11. Rule 144A  . . . . . . . . . . . . . . .    7 
          Section 3.12. Reporting  . . . . . . . . . . . . . . .    7 
          Section 3.13. Registration and Qualification . . . . .    7 
          Section 3.14. No Liabilities . . . . . . . . . . . . .    7 
          Section 3.15. No Defaults  . . . . . . . . . . . . . .    7 
          Section 3.16. Violations of Law  . . . . . . . . . . .    8 
          Section 3.17. Enforceability of Agreement  . . . . . .    8 
          Section 3.18. The Notes  . . . . . . . . . . . . . . .    8 
          Section 3.19. The Indenture  . . . . . . . . . . . . .    9 
          Section 3.20. The Registration Rights Agreement  . . .    9 
          Section 3.21. The Capital Stock  . . . . . . . . . . .    9 
          Section 3.22. Ranking of Notes . . . . . . . . . . .     10 
          Section 3.23. Properties and Assets  . . . . . . . .     10 
          Section 3.24. Intellectual Property  . . . . . . . .     10 
          Section 3.25. Taxes  . . . . . . . . . . . . . . . .     11 
          Section 3.26. Insurance  . . . . . . . . . . . . . .     11 
          Section 3.27. Certain Payments . . . . . . . . . . .     11 
          Section 3.28. No Prohibition . . . . . . . . . . . .     11 

     ARTICLE IV. REPRESENTATIONS AND WARRANTIES OF THE PURCHASER   12 
          Section 4.1.  Investment . . . . . . . . . . . . . .     12 
          Section 4.2.  Rule 144 . . . . . . . . . . . . . . .     12 
          Section 4.3.  Organization of the Purchaser  . . . .     13 
          Section 4.4.  Authority of the Purchaser . . . . . .     13 

     ARTICLE V. CONDITIONS TO THE OBLIGATIONS OF THE PARTIES .     14 
          Section 5.1.  Condition to Obligations 
                         of the Purchaser  . . . . . . . . . .     14 
          Section 5.2.  Condition to Obligations 
                         of Both Parties . . . . . . . . . . .     14 

     ARTICLE VI. [Intentionally Omitted] . . . . . . . . . . .     14 

     ARTICLE VII. ADDITIONAL COVENANTS . . . . . . . . . . . .     14 
          Section 7.1.  PORTAL; DTC  . . . . . . . . . . . . .     14 
          Section 7.2.  Reporting  . . . . . . . . . . . . . .     14 
          Section 7.3.  Payment of Expenses  . . . . . . . . .     15 
          Section 7.4.  Inspection . . . . . . . . . . . . . .     15 
          Section 7.5.  Indenture  . . . . . . . . . . . . . .     15 
          Section 7.6.  Availability of Preferred 
                         Shares and Common Stock . . . . . . .     15 

     ARTICLE VIII. RESTRICTIONS ON TRANSFERABILITY OF SECURITIES   16 
          Section 8.1.  Restrictions on Transferability  . . .     16 
          Section 8.2.  Restrictive Legend . . . . . . . . . .     16 
          Section 8.3.  Notice of Proposed Transfers . . . . .     16 
          Section 8.4.  Registration Rights Agreement  . . . .     17 

     ARTICLE IX. TERMINATION . . . . . . . . . . . . . . . . .     17 

     ARTICLE X. MISCELLANEOUS  . . . . . . . . . . . . . . . .     18 
          Section 10.1.  Governing Law . . . . . . . . . . . .     18 
          Section 10.2.  Survival  . . . . . . . . . . . . . .     18 
          Section 10.3.  Successors and Assigns  . . . . . . .     18 
          Section 10.4.  Entire Agreement; Amendment . . . . .     18 
          Section 10.5.  Notices, Etc  . . . . . . . . . . . .     19 
          Section 10.6.  Delays or Omissions . . . . . . . . .     19 
          Section 10.7.  Counterparts  . . . . . . . . . . . .     19 
          Section 10.8.  Severability  . . . . . . . . . . . .     19 
          Section 10.9.  Titles and Subtitles  . . . . . . . .     20 
          Section 10.10. No Public Announcement  . . . . . . .     20 


                       SECURITIES PURCHASE AGREEMENT

               This SECURITIES PURCHASE AGREEMENT (this "Agreement")
     is made as of November 30, 1995 between SoftKey International,
     Inc., a Delaware corporation (the "Company"), and Tribune
     Company, a Delaware corporation (the "Purchaser").

               In consideration of the mutual covenants, agreements,
     representations and warranties herein set forth, it is hereby
     agreed between the Company and the Purchaser as follows:

                                 ARTICLE I

                      AUTHORIZATION AND SALE OF NOTES

               SECTION 1.1.  AUTHORIZATION.  The Company has
     heretofore authorized the issuance and sale to the Purchaser
     pursuant to this Agreement of the Company's 51/2% Senior
     Convertible/Exchangeable Notes due 2000 (the "Notes") in the
     aggregate principal amount of $150,000,000, such Notes to be in
     the form and to have terms and provisions substantially as set
     forth in the indenture (the "Indenture") dated as of November 30,
     1995 between the Company and State Street Bank and Trust Company,
     as trustee (the "Trustee"), which Indenture is attached hereto as
     Exhibit A.  The Notes shall represent senior, unsecured
     obligations of the Company and shall rank pari passu with the
     Company's 51/2% Senior Convertible Notes due 2000 (the "Old
     Notes").  The shares of the Company's 51/2% Series C Convertible
     Preferred Stock into which the Notes are exchangeable are
     hereinafter called the "Preferred Shares." 

               SECTION 1.2.  ISSUANCE AND SALE OF NOTES.  Upon the
     terms and subject to the conditions set forth herein, on the
     Closing Date (as defined below), the Company will issue and sell
     to the Purchaser and, in reliance on the representations and
     warranties of the Company contained herein, the Purchaser will
     purchase from the Company, the Notes, at a purchase price equal
     to $150,000,000, which amount equals 100% of the principal amount
     thereof.  

                                 ARTICLE II

                                  CLOSING

               SECTION 2.1.  CLOSING DATE.  The closing (the
     "Closing") of the purchase and sale of the Notes contemplated
     hereby shall take place on such date and at such time as agreed
     to by the Company and the Purchaser and upon which all of the
     conditions set forth in Article V are satisfied or waived (the
     date of the Closing is hereinafter referred to as the "Closing
     Date").  The Closing shall be held at the offices of Sidley &
     Austin, One First National Plaza, Chicago, Illinois 60603, or at
     such other place as agreed to by the Company and the Purchaser.

               Delivery of the Notes to be purchased by the Purchaser
     pursuant to this Agreement shall be made at the Closing by the
     Company delivering to the Purchaser, against payment of the
     purchase price therefor, one Note for the total principal amount
     of Notes to be purchased by the Purchaser (registered in the name
     of the Purchaser or such other person which shall be an affiliate
     of the Purchaser or a nominee of the Purchaser or such affiliate
     as the Purchaser may have designated in writing to the Company at
     least one business day prior to the Closing Date), unless at
     least two business days prior to the Closing Date the Purchaser
     shall have requested that the Company deliver more than one Note,
     in which event the Company will deliver to the Purchaser the
     number of Notes so requested, registered in such name or names
     specified in such request (subject to the foregoing limitation)
     and in such principal amounts as shall have been specified in the
     request.  Payment of the purchase price for the Notes to be
     purchased hereunder shall be made by the Purchaser by Federal
     funds check or bank check made payable to the Company in, or by
     wire transfer of, immediately available funds.

               SECTION 2.2.  FURTHER ASSURANCES.  From time to time
     following the Closing, upon the request of the Purchaser, the
     Company shall execute and deliver, or cause to be executed and
     delivered, to the Purchaser such other instruments as may be
     reasonably necessary to more effectively vest in the Purchaser
     and put the Purchaser in possession of the Notes, the Preferred
     Shares and the shares of common stock, par value $.01 per share,
     of the Company (the "Common Stock") issuable upon conversion of
     the Notes or the Preferred Shares.  The Company shall cooperate
     with the Purchaser in obtaining as soon as practicable all
     necessary governmental consents and approvals, including
     approvals under the Hart-Scott-Rodino Antitrust Improvements Act
     of 1976, as amended (the "HSR Act").

                                ARTICLE III

               REPRESENTATIONS AND WARRANTIES OF THE COMPANY

               As an inducement to the Purchaser to enter into this
     Agreement and to consummate the transactions contemplated hereby,
     except as set forth in a letter dated the date hereof from the
     Company to the Purchaser, the Company represents and warrants to
     the Purchaser as follows:

               SECTION 3.1.  SEC REPORTS.  The Company has filed all
     documents required to be filed since January 1, 1995 with the
     Securities and Exchange Commission (the "Commission") (the "SEC
     Reports").  As of their respective dates, the SEC Reports
     complied in all material respects with the requirements of the
     Securities Act of 1933, as amended (including the rules and
     regulations promulgated thereunder, the "Securities Act"), and
     the Securities Exchange Act of 1934, as amended (including the
     rules and regulations promulgated thereunder, the "Exchange
     Act"), as the case may be, and none of the SEC Reports contained
     any untrue statement of a material fact or omitted to state a
     material fact required to be stated therein, in order to make the
     statements contained therein, in light of the circumstances under
     which they were made, not misleading. 

               SECTION 3.2.  ACCOUNTANTS.  Coopers & Lybrand L.L.P.,
     Arthur Andersen LLP, KPMG Peat Marwick LLP, Price Waterhouse LLP
     and Deloitte & Touche LLP, who have expressed their respective
     opinions with respect to the financial statements and schedules
     included in the Offering Circular, dated October 17, 1995,
     relating to the Old Notes (the "Offering Circular") are
     independent accountants as required by the Securities Act.

               SECTION 3.3.  FINANCIAL STATEMENTS.  (a) The annual
     audited financial statements of the Company included in the
     Offering Circular present fairly the financial position of the
     Company, as of the respective dates of such financial statements,
     and the results of operations and changes in cash flows of the
     Company for the respective periods covered thereby.  Such
     statements and related notes have been prepared in accordance
     with generally accepted accounting principles applied on a
     consistent basis, in each case, as certified by one or more of
     the independent accountants named in Section 3.2.  The selected
     financial data set forth in the Offering Circular under the
     captions "Summary," "Capitalization," "Selected Historical
     Consolidated Financial Data" and "Selected Pro Forma Consolidated
     Financial Data" fairly present the information set forth therein
     as of the respective dates thereof on the basis stated in the
     Offering Circular.

               (b)  The unaudited interim financial statements of the
     Company included in the Offering Circular and in the Company's
     Quarterly Report on Form 10-Q for the period ended September 30,
     1995 (the "Third Quarter 10-Q") present fairly the financial
     position of the Company, as of the respective dates of such
     financial statements, and the results of operations and changes
     in cash flows of the Company for the respective periods covered
     thereby.  Such statements and related notes have been prepared in
     accordance with generally accepted accounting principles applied
     on a consistent basis except for normal year-end adjustments and
     the omission of certain footnote disclosure.

               (c)  The pro forma consolidated condensed balance sheet
     and consolidated condensed statements of income and the related
     notes thereto included in the Offering Circular have been
     prepared in accordance with the applicable requirements of Rule
     11-02 of Regulation S-X promulgated under the Exchange Act, and
     have been compiled on the pro forma basis described therein, and
     the assumptions used in the preparation thereof were reasonable
     at the time made and the adjustments used therein are based upon
     good faith estimates and assumptions believed by the Company to
     be reasonable at the time made.

               SECTION 3.4.  ABSENCE OF CERTAIN CHANGES.  Except as
     disclosed in the SEC Reports, subsequent to the dates as of which
     information is given in the Offering Circular, except as set
     forth therein, there has been no material adverse change or any
     development involving a prospective material adverse change in
     the business, properties, operations, condition (financial or
     other) or results of operations of the Company and its
     Subsidiaries (as defined herein) taken as a whole, whether or not
     arising from transactions in the ordinary course of business, and
     since the date of the latest balance sheet presented in the Third
     Quarter 10-Q, neither the Company nor any of its Subsidiaries has
     incurred or undertaken any liabilities or obligations, direct or
     contingent, which are material to the Company and its
     Subsidiaries taken as a whole, except for (i) the Old Notes, (ii)
     liabilities or obligations which are reflected in the Third
     Quarter 10-Q or the Offering Circular, (iii) liabilities or
     obligations in connection with the Agreement and Plan of Merger,
     dated as of October 30, 1995, by and among the Company, Schoolco,
     Inc., a Minnesota corporation and a wholly owned subsidiary of
     the Company, and Minnesota Educational Computing Corporation
     ("MECC"), a Minnesota corporation and (iv) the transactions
     contemplated hereby and any other agreements entered into between
     the Purchaser and the Company, either alone or together with
     other parties thereto, as of the date of this Agreement.

               SECTION 3.5.  AUTHORITY.  The Company has all necessary
     corporate power and corporate authority to enter into this
     Agreement and the other agreements, documents and instruments to
     be executed by the Company in furtherance of the transactions
     contemplated hereby, including without limitation, the Indenture,
     the Notes and the Securities Resale Registration Rights Agreement
     between the Company and the Purchaser, a form of which is
     attached hereto as Exhibit B (the "Registration Rights
     Agreement") (collectively, the "Transaction Documents"), and to
     consummate the transactions contemplated hereby and thereby.

               SECTION 3.6.  NON-CONTRAVENTION.  The execution,
     delivery, and performance of this Agreement by the Company and
     the consummation of the transactions contemplated hereby do not
     and will not, (i) except as disclosed in the Offering Circular,
     (ii) except for the consent of Fleet Bank of Massachusetts, N.A.
     (the "Bank") in connection with the Credit Agreement dated
     September 30, 1994 by and between SoftKey Inc. and the Bank, as
     amended to date, which consent has been obtained and (iii) except
     as to defaults which individually or in the aggregate would not
     be material to the Company, (A) conflict with or result in a
     breach of any of the terms and provisions of, or constitute a
     default (or an event which with notice or lapse of time, or both,
     would constitute a default) under, or result in the creation or
     imposition of any lien, charge or encumbrance upon any property
     or assets of the Company or any of its Subsidiaries pursuant to
     any agreement, instrument, franchise, license or permit to which
     the Company or any of its Subsidiaries is a party or by which any
     of such corporations or their respective properties or assets may
     be bound or (B) violate or conflict with any judgment, decree,
     order, statute, rule or regulation of any court or any public,
     governmental or regulatory agency or body applicable to the
     Company or any of its Subsidiaries or any of their respective
     properties or assets.  The execution, delivery and performance of
     this Agreement by the Company and the consummation of the
     transactions contemplated hereby do not and will not violate or
     conflict with any provision of the certificate of incorporation
     or by-laws of the Company or any of its Subsidiaries, as
     currently in effect.  No consent, approval, authorization, order,
     registration, filing, qualification, license or permit of or with
     any court or any governmental agency or body applicable to the
     Company or any of its Subsidiaries or any of their respective
     properties or assets is required for the execution, delivery and
     performance of this Agreement or the consummation of the
     transactions contemplated hereby, including the issuance, sale
     and delivery of the Notes to be issued, sold and delivered by the
     Company hereunder, except such consents, approvals,
     authorizations, orders, registrations, filings, qualifications,
     licenses and permits as may be required under state securities or
     Blue Sky laws in connection with the purchase of the Notes by the
     Purchaser.

               SECTION 3.7.  CAPITALIZATION.  The Company had, as of
     September 30, 1995, an authorized and outstanding capitalization
     as set forth in the Third Quarter 10-Q, and the capital stock of
     the Company conforms in all material respects to the description
     thereof contained in the Offering Circular and the Company's
     Tender Offer Statement on Schedule 14D-1 filed on October 30,
     1995 relating to the Company's offer to purchase outstanding
     shares of common stock of The Learning Company, a Delaware
     corporation ("TLC"), (including all amendments and supplements
     thereto, the "Schedule 14D-1").

               SECTION 3.8.  SUBSIDIARIES.  The Company does not own
     or control, directly or indirectly, any corporation, association
     or other entity other than (x) the subsidiaries listed in Exhibit
     21 to the Annual Report on Form 10-K for the Company's most
     recent fiscal year ("Exhibit 21"), (y) tewi Verlag GmbH, Future
     Vision Holding, Inc., Future Vision Multimedia, Inc., Multimedia
     Products Corporation, FVH Asia Pte Ltd. and SuperStudio Ltd. and
     (z) subsidiaries not required to be listed on Exhibit 21.  The
     subsidiaries described in clauses (x) and (y) of the foregoing
     sentence, with the exception of (i) SoftKey Software Products of
     Florida, Inc., (ii) SS Publish International Inc., (iii) Power Up
     UK limited and (iv) Spinnaker Software International Limited, are
     hereinafter referred to as the "Subsidiaries."  The subsidiaries
     identified in clauses (i) through (iv) in the preceding sentence
     would not in the aggregate constitute a "significant subsidiary"
     within the meaning of Rule 1-02(w) under Regulation S-X
     promulgated by the Commission.  Each of the Company and its
     Subsidiaries has been duly organized and is validly existing as a
     corporation in good standing under the laws of its jurisdiction
     of incorporation.  Each of the Company and its Subsidiaries is
     duly qualified to do business and in good standing as a foreign
     corporation in each jurisdiction in which the character or
     location of its properties (owned, leased or licensed) or the
     nature or conduct of its business makes such qualification
     necessary, except for those failures to be so qualified or in
     good standing which will not in the aggregate have a material
     adverse effect on the Company and its Subsidiaries taken as a
     whole or result in any material adverse change or any development
     involving a material adverse change in the business, properties,
     operations, conditions (financial or other) or results of
     operations of the Company and its Subsidiaries taken as a whole. 
     The Company owns all of the outstanding capital stock of each of
     its Subsidiaries, other than the non-voting exchangeable shares
     of SoftKey Software Products Inc. and qualifying shares of
     certain Subsidiaries organized outside the United States, free
     and clear of all claims, liens, charges and encumbrances.  Each
     of the Company and its Subsidiaries has all requisite power and
     authority, and all necessary consents, approvals, authorizations,
     orders, registrations, qualifications, licenses and permits of
     and from all public, regulatory or governmental agencies and
     bodies, to own, lease and operate its properties and conduct its
     business as now being conducted as described in the Offering
     Circular, except where the failure to possess such requisite
     power and authority would not have a material adverse effect on
     the business, properties, operations, condition (financial or
     other), or results of operations of the Company and its
     Subsidiaries taken as a whole, and no such consent, approval,
     authorization, order, registration, qualification, license or
     permit contains a materially burdensome restriction not
     adequately disclosed in the Offering Circular.

               SECTION 3.9.  ACTIONS.  Except as described in the SEC
     Reports, there is no litigation or governmental proceeding to
     which the Company or any of its Subsidiaries is a party or to
     which any property of the Company or any of its Subsidiaries is
     subject or which is pending or, to the knowledge of the Company,
     contemplated against the Company or any of its Subsidiaries which
     might reasonably be expected to result in any material adverse
     change or any development involving a material adverse change in
     the business, properties, operations, condition (financial or
     other) or results of operations of the Company and its
     Subsidiaries taken as a whole.

               SECTION 3.10.  INVESTMENT COMPANY ACT.  Neither the
     Company nor any of its Subsidiaries is (i) an "investment
     company" or a company "controlled" by an investment company
     within the meaning of the Investment Company Act of 1940, as
     amended, (ii) a "holding company" or a "subsidiary company" of a
     holding company or an "affiliate" thereof within the meaning of
     the Public Utility Holding Company Act of 1935, as amended, or
     (iii) subject to regulation under the Federal Power Act, the
     Interstate Commerce Act or any federal or state statute or
     regulation limiting its ability to incur indebtedness for
     borrowed money.

               SECTION 3.11.  RULE 144A.  The Notes and Preferred
     Shares are eligible for resale pursuant to Rule 144A and, when
     issued, will not be of the same class as securities listed on a
     national securities exchange registered under Section 6 of the
     Exchange Act or quoted in a U.S. automated inter-dealer quotation
     system.

               SECTION 3.12.  REPORTING.  The Company is subject to
     Section 13 of the Exchange Act and is in compliance in all
     material respects with the provisions of such section.

               SECTION 3.13.  REGISTRATION AND QUALIFICATION. 
     Assuming the accuracy of the representations and warranties made
     by the Purchaser and set forth in Article IV hereof, it is not
     necessary in connection with the offer, sale and delivery of the
     Notes to the Purchaser in the manner contemplated by this
     Agreement to register the Notes under the Securities Act or to
     qualify the Indenture under the Trust Indenture Act of 1939, as
     amended (the "Trust Indenture Act").

               SECTION 3.14.  NO LIABILITIES.  Neither the Company nor
     its Subsidiaries has any material liabilities or obligations
     (direct or indirect, contingent or absolute, known or unknown,
     matured or unmatured) of any nature whatsoever, whether arising
     out of contract, tort, statute or otherwise ("Liabilities"),
     except (i) as reflected or reserved against in the balance sheet
     of the Company included in its annual financial statements for
     the year ended December 31, 1994 and not heretofore discharged,
     (ii) as specifically disclosed in the SEC Reports or (iii)
     Liabilities incurred in the ordinary course of business since
     September 30, 1995.

               SECTION 3.15.  NO DEFAULTS.  Except as disclosed in the
     SEC Reports, and except as to defaults which individually or in
     the aggregate would not be material to the Company, neither the
     Company nor any of its Subsidiaries is in violation or default
     under any provision of its certificate of incorporation, by-laws
     or other organizational documents, or is in breach of or default
     with respect to any provision of any agreement, judgment, decree,
     order, mortgage, deed of trust, lease, franchise, license,
     indenture, permit or other instrument to which it is a party or
     by which it or any of its properties are bound; and there does
     not exist any state of facts which constitutes an event of
     default on the part of the Company or any such Subsidiary as
     defined in such documents or which, with notice or lapse of time
     or both, would constitute such an event of default.

               SECTION 3.16.  VIOLATIONS OF LAW.  The Company and its
     Subsidiaries are in compliance, and have complied in all material
     respects, at all times during the past three years, and all
     transactions involving the issuance, offer, placement and sale,
     pursuant to the terms of the Transaction Documents, of the Notes
     comply, in all material respects, with all applicable federal,
     state and local statutes, codes, ordinances, rules and
     regulations of the United States and all other countries and
     subdivisions thereof (the "Laws") to the extent applicable, other
     than violations which would not have a material adverse effect on
     the Company and its Subsidiaries taken as a whole.  Neither the
     Company nor any of its Subsidiaries has received notice within
     the past three years of any violations of any Laws, which
     violations would be material to the Company and its Subsidiaries
     taken as a whole.  The Company and each of its Subsidiaries have
     all material licenses, franchises, permits, certificates and
     other approvals or authorizations from all regulatory officials
     and bodies that are necessary to the conduct of their respective
     businesses and to the ownership or lease of their respective
     properties as described or contemplated in the Offering Circular.

               SECTION 3.17.  ENFORCEABILITY OF AGREEMENT.  This
     Agreement has been duly and validly authorized, executed and
     delivered by the Company and is a valid and binding obligation of
     the Company, enforceable against the Company in accordance with
     its terms.

               SECTION 3.18.  THE NOTES.  The Notes have been duly and
     validly authorized by the Company, and the Notes, when
     authenticated by the Trustee and issued, sold and delivered in
     accordance with this Agreement and the Indenture, will have been
     duly and validly executed, authenticated, issued and delivered
     and will constitute valid and binding obligations of the Company,
     enforceable against the Company in accordance with their terms
     and entitled to the benefits provided by the Indenture except as
     such enforcement may be subject to or limited by (i) bankruptcy,
     insolvency, reorganization, moratorium or other similar laws now
     or hereafter in effect relating to creditors' rights and remedies
     generally and (ii) general principles of equity (regardless of
     whether such enforcement may be sought in a proceeding in equity
     or at law).

               SECTION 3.19.  THE INDENTURE.  The Indenture has been
     duly and validly authorized by the Company, and the Indenture
     when executed and delivered by the Company and the Trustee, will
     constitute a valid and binding obligation of the Company,
     enforceable against the Company in accordance with its terms,
     except as such enforcement may be subject to or limited by (i)
     bankruptcy, insolvency, reorganization, moratorium or other
     similar laws now or hereafter in effect relating to creditors'
     rights and remedies generally and (ii) general principles of
     equity (regardless of whether such enforcement may be sought in a
     proceeding in equity or at law).

               SECTION 3.20.  THE REGISTRATION RIGHTS AGREEMENT.  The
     Registration Rights Agreement has been duly and validly
     authorized, executed and delivered by the Company.  The
     Registration Rights Agreement, when executed and delivered by the
     Company and the Purchaser, will constitute a valid and binding
     obligation of the Company, enforceable against the Company in
     accordance with its terms, except as such enforcement may be
     subject to or limited by (i) bankruptcy, insolvency,
     reorganization, moratorium or other similar laws now or hereafter
     in effect relating to creditors' rights and remedies generally
     and (ii) general principles of equity (regardless of whether such
     enforcement may be sought in a proceeding in equity or at law).

               SECTION 3.21.  THE CAPITAL STOCK.  (a) All of the
     outstanding shares of Common Stock are duly and validly
     authorized and issued, fully paid and nonassessable, have been
     issued in compliance with all federal and state securities laws,
     and were not issued and are not now in violation of or subject to
     any preemptive rights.  All issued and outstanding shares of
     capital stock of each Subsidiary of the Company have been duly
     authorized and validly issued and are fully paid and
     nonassessable.  Except as disclosed in or contemplated by the SEC
     Reports or the Offering Circular, neither the Company nor any
     Subsidiary has outstanding any options to purchase, or any
     preemptive rights or other rights to subscribe for or to
     purchase, any securities or obligations convertible into, or any
     contracts or commitments to issue or sell, shares of its capital
     stock or any such options, rights, convertible securities or
     obligations.  There are currently no shares of the Company's
     preferred stock outstanding.

               (b)  (i) The Preferred Shares issuable upon exchange of
     the Notes have been duly authorized and, when issued in
     accordance with the terms of the Notes, will be validly issued,
     fully paid and nonassessable.  The shares of Common Stock
     issuable upon conversion of the Notes or the Preferred Shares
     have been duly authorized and, when issued in accordance with the
     terms of the Notes and/or Preferred Shares, will be validly
     issued, fully paid and nonassessable.  No preemptive rights or
     other rights to subscribe for or purchase securities exist with
     respect to the issuance and sale of the Notes by the Company
     pursuant to this Agreement, the issuance of the Preferred Shares
     upon exchange of the Notes or the issuance of Common Stock on
     conversion of the Notes and/or the Preferred Shares.  

               (ii)  No security holder of the Company has any right
     which has not been satisfied or waived to require the Company to
     register the sale of any securities owned by such security holder
     under the Securities Act in the Shelf Registration Statement (as
     defined in the Registration Rights Agreement), except as
     contemplated by the Registration Rights Agreement.

               (iii)  The Preferred Shares issuable upon exchange of
     the Notes have been reserved for issuance and no further approval
     or authority of the stockholders or the Board of Directors of the
     Company under the Delaware General Corporation Law will be
     required for such issuance of Preferred Shares upon exchange for
     the Notes.  The shares of Common Stock issuable on conversion of
     the Notes and/or the Preferred Shares at the initial conversion
     price have been reserved for issuance, and no further approval or
     authority of the stockholders or the Board of Directors of the
     Company under the Delaware General Corporation Law will be
     required for such issuance of Common Stock.

               SECTION 3.22.  RANKING OF NOTES.  When issued, the
     Notes will rank pari passu in order of preference with (i) all of
     the Company's other unsecured and unsubordinated indebtedness for
     borrowed money and (ii) the Old Notes.

               SECTION 3.23.  PROPERTIES AND ASSETS.  The Company or
     the applicable Subsidiary has good and marketable title to all
     the properties and assets reflected as owned in the financial
     statements hereinabove described (or elsewhere in the Offering
     Circular), subject to no lien, mortgage, pledge, charge or
     encumbrance of any kind except (i) those, if any, reflected in
     such financial statements (or elsewhere in the Offering Circular)
     or (ii) those which are not material in amount and do not
     adversely affect the use made and proposed to be made of such
     property by the Company and its Subsidiaries.  The Company or the
     applicable Subsidiary holds its leased properties under valid and
     binding leases, with such exceptions as are not materially
     significant in relation to the business of the Company.  Except
     as disclosed in the Offering Circular, the Company owns or leases
     all such properties as are necessary to its operations as now
     conducted.

               SECTION 3.24.  INTELLECTUAL PROPERTY.  Except as
     disclosed in or specifically contemplated by the SEC Reports, the
     Company and its Subsidiaries have sufficient trademarks, trade
     names, patent rights, copyrights, licenses, approvals and
     governmental authorizations to conduct their businesses as now
     conducted; the expiration of any trademarks, trade names, patent
     rights, copyrights, licenses, approvals or governmental
     authorizations would not have a material adverse effect on the
     condition (financial or otherwise), business or results of
     operations of the Company and its Subsidiaries taken as a whole;
     and the Company has no knowledge of any material infringement by
     it or its Subsidiaries of trademark, trade name, patent,
     copyright, licenses, trade secret or other similar rights of
     others, and there is no claim being made against the Company or
     its Subsidiaries regarding trademark, trade name, patent,
     copyright, license, trade secret or other infringement which
     would have a material adverse effect on the condition (financial
     or otherwise), business or results of operations of the Company
     and its Subsidiaries taken as a whole.

               SECTION 3.25.  TAXES.  The Company and its Subsidiaries
     have filed all necessary federal, state and foreign income and
     franchise tax returns and have paid all taxes shown as due
     thereon; and the Company has no knowledge of any tax deficiency
     which has been asserted or threatened against the Company or its
     Subsidiaries which could materially and adversely affect the
     business, operations or properties of the Company and its
     Subsidiaries taken as a whole.

               SECTION 3.26.  INSURANCE.  The Company or its
     Subsidiaries maintain insurance of the types and in the amounts
     generally deemed adequate for its business and that of its
     Subsidiaries against theft, damage, destruction, acts of
     vandalism and all other risks customarily insured against, all of
     which insurance is in full force and effect.

               SECTION 3.27.  CERTAIN PAYMENTS.  To the knowledge of
     the Company, neither the Company nor any of its Subsidiaries has
     at any time since February 4, 1994 (i) made any unlawful
     contribution to any candidate for foreign office, or failed to
     disclose fully any contribution in violation of law or (ii) made
     any payment to any federal or state governmental officer or
     official, or other person charged with similar public or quasi-
     public duties, other than payments required or permitted by the
     laws of the United States or any jurisdiction thereof.

               SECTION 3.28.  NO PROHIBITION.  No action has been
     taken and no law, statute, rule or regulation or order has been
     enacted, adopted or issued by any governmental agency or body
     which prevents the issuance of the Notes or the Preferred Shares,
     and no injunction, restraining order or other order or relief of
     any nature by a federal or state court or other tribunal of
     competent jurisdiction has been issued with respect to the
     Company or any of its Subsidiaries that would prevent the
     issuance of the Notes or the Preferred Shares.  No action, suit
     or proceeding is pending or threatened against or affecting the
     Company or any of its Subsidiaries before any court or arbitrator
     or any governmental body, agency or official, domestic or
     foreign, which, if adversely determined, would materially
     interfere with or adversely affect the issuance of the Notes or
     the Preferred Shares or in any manner draw into question the
     validity of the Transaction Documents, the Notes or the Preferred
     Shares; and every request of any securities authority or agency
     of any jurisdiction for additional information has been complied
     with.

                                 ARTICLE IV

              REPRESENTATIONS AND WARRANTIES OF THE PURCHASER

               As an inducement to the Company to enter into this
     Agreement and to consummate the transactions contemplated hereby,
     the Purchaser hereby represents and warrants to the Company as
     follows:

               SECTION 4.1.  INVESTMENT.  The Purchaser is acquiring
     the Notes, the Preferred Shares and the shares of Common Stock
     issuable upon conversion of the Notes and/or Preferred Shares for
     investment for its own account, and not with a view to any
     distribution thereof.  The Purchaser understands that the Notes,
     the Preferred Shares and the shares of Common Stock issuable upon
     conversion of the Notes and/or Preferred Shares have not been
     registered under the Securities Act by reason of specific
     exemptions therefrom which depend upon, among other things, the
     bona fide nature of the investment intent and the accuracy of the
     Purchaser's representations as expressed herein.  

               The Purchaser's financial condition and investments are
     such that it is in a position to hold the Notes, the Preferred
     Shares and the shares of Common Stock issuable upon conversion of
     the Notes and/or Preferred Shares for an indefinite period, bear
     the economic risks of the investment and to withstand the
     complete loss of the investment.  The Purchaser has extensive
     knowledge and experience in financial and business matters and
     has the capability to evaluate the merits and risks of any
     investment in the Notes, the Preferred Shares and the shares of
     Common Stock issuable upon conversion of the Notes and/or
     Preferred Shares.  The Purchaser qualifies as an "accredited
     investor" as such term is defined in Section 4(6) of the
     Securities Act and Regulation D promulgated thereunder.  

               SECTION 4.2.  RULE 144.  The Purchaser acknowledges
     that the Notes, the Preferred Shares and the shares of Common
     Stock issuable upon conversion of the Notes and/or Preferred
     Shares must be held indefinitely unless subsequently registered
     under the Securities Act or any applicable state securities laws
     or unless exemptions from such registrations are available.  The
     Purchaser is aware of the provisions of Rule 144 promulgated
     under the Securities Act which permit limited resale of
     securities purchased in a private placement subject to the
     satisfaction of certain conditions.  

               SECTION 4.3.  ORGANIZATION OF THE PURCHASER.  The
     Purchaser is a corporation duly organized, validly existing and
     in good standing under the laws of the State of Delaware.

               SECTION 4.4.  AUTHORITY OF THE PURCHASER.  The
     Purchaser has the corporate power and corporate authority to
     execute and deliver this Agreement, to consummate the
     transactions contemplated hereby and to comply with the terms,
     conditions and provisions hereof.

               The execution, delivery and performance of this
     Agreement by the Purchaser has been duly authorized and approved
     by the Purchaser's Board of Directors and does not require any
     further authorization or consent of the Purchaser or its
     stockholders.  This Agreement is the legal, valid and binding
     agreement of the Purchaser, enforceable against the Purchaser in
     accordance with its terms.

               Neither the execution and delivery by the Purchaser of
     this Agreement or the consummation by the Purchaser of any of the
     transactions contemplated hereby nor compliance by the Purchaser
     with or fulfillment by the Purchaser of the terms, conditions and
     provisions hereof will:

               (a)  conflict with, result in a breach of the terms,
     conditions or provisions of, or constitute a default, an event of
     default or an event creating rights of acceleration, termination
     or cancellation or a loss of rights under, the Certificate of
     Incorporation or By-laws of the Purchaser or any material
     indenture, note, instrument or other agreement or any judgment,
     order, award or decree to which the Purchaser is a party or any
     of its properties is subject or by which the Purchaser is bound,
     or

               (b)  require the approval, consent, authorization or
     act of, or the making by the Purchaser of any declaration, filing
     or registration with, any third party or any governmental
     authority, except for filings under the Securities Act, the
     Exchange Act and the HSR Act.

                                 ARTICLE V

                CONDITIONS TO THE OBLIGATIONS OF THE PARTIES

               SECTION 5.1.  CONDITION TO OBLIGATIONS OF THE
     PURCHASER.  The obligations of the Purchaser to purchase and pay
     for the Notes as provided herein shall be subject to the
     condition that the Company shall, concurrently with the Closing,
     pay for, or accept for payment, a majority of the outstanding
     shares of common stock of TLC.

               SECTION 5.2.  CONDITION TO OBLIGATIONS OF BOTH PARTIES. 
     The obligations of each of the Company and the Purchaser to
     consummate the transactions contemplated by this Agreement are
     subject to the condition that no temporary restraining order,
     preliminary or permanent injunction or other order issued by any
     court of competent jurisdiction prohibiting or preventing
     consummation of the transactions contemplated by this Agreement
     shall be in effect.

                                 ARTICLE VI

                          [INTENTIONALLY OMITTED]

                                ARTICLE VII

                            ADDITIONAL COVENANTS

               SECTION 7.1.  PORTAL; DTC.  The Company will use its
     reasonable best efforts to cause the Notes and/or the Preferred
     Shares to be designated Private Offerings, Resales and Trading
     through Automated Linkages ("PORTAL") market securities in
     accordance with the rules and regulations adopted by the National
     Association of Securities Dealers, Inc., relating to trading in
     the PORTAL market.  The Company will, if requested by the
     Purchaser, use its reasonable efforts in cooperation with the
     Purchaser to permit the Notes and/or the Preferred Shares to be
     eligible for clearance and settlement through The Depository
     Trust Company ("DTC").

               SECTION 7.2.  REPORTING.  The Company will, so long as
     the Notes and/or Preferred Shares are outstanding and are
     "restricted securities" within the meaning of Rule 144(a)(3)
     under the Securities Act, either (i) file reports and other
     information with the Commission under Section 13 or 15(d) of the
     Exchange Act, or (ii) in the event it is not subject to Section
     13 or 15(d) of the Exchange Act, make available to holders of the
     Notes and/or Preferred Shares and prospective purchasers of the
     Notes and/or Preferred Shares designated by such holders, upon
     request of such prospective purchasers, the information required
     to be delivered pursuant to Rule 144A(d)(4) under the Securities
     Act to permit compliance with Rule 144A in connection with
     resales of the Notes and/or Preferred Shares.

               SECTION 7.3.  PAYMENT OF EXPENSES.  Whether or not the
     transactions contemplated in this Agreement are consummated or
     this Agreement is terminated, the Company hereby agrees to pay
     all costs and expenses incident to the performance of the
     obligations of the Company hereunder, including those in
     connection with (i) the issuance, transfer and delivery of the
     Notes and/or Preferred Shares to the Purchaser, including any
     transfer or similar taxes payable thereon, (ii) the qualification
     of the Notes and/or Preferred Shares under state or foreign
     securities or Blue Sky laws, (iii) the cost of printing the Notes
     and/or Preferred Shares, (iv) the cost and charges of any
     transfer agent, registrar, trustee or fiscal paying agent and (v)
     the cost and charges of DTC, Euroclear and CEDEL.

               SECTION 7.4.  INSPECTION.  Prior to the Closing, the
     Company will permit the Purchaser and its representatives to
     visit and inspect any of the Company's properties, to examine its
     books and records and to make copies and to take extracts
     therefrom, and to discuss its business affairs and finances with
     its officers and key employees, all at such reasonable times as
     the Purchaser may request.  The Company also agrees to provide
     answers to reasonable questions from each subsequent prospective
     purchaser of the Notes and/or Preferred Shares concerning the
     Company and its Subsidiaries (to the extent that such information
     is not available to subsequent prospective purchasers without
     unreasonable effort or expense and to the extent the provision
     thereof is not prohibited by applicable law).

               SECTION 7.5.  INDENTURE.  The Company covenants and
     agrees that it will use its reasonable efforts to cause the
     Indenture to be qualified under the Trust Indenture Act at or
     prior to the effectiveness of the Shelf Registration Statement
     (as defined in the Registration Rights Agreement).

               SECTION 7.6.  AVAILABILITY OF PREFERRED SHARES AND
     COMMON STOCK.  The Company shall at all times reserve and keep
     available out of its authorized but unissued shares of preferred
     stock, for the purpose of effecting the exchange of Notes, the
     full number of Preferred Shares then issuable upon exchange of
     the Notes.  The Company shall at all times reserve and keep
     available out of its authorized but unissued Common Stock, for
     the purpose of effecting the conversion of the Notes and/or
     Preferred Shares, the full number of shares of Common Stock then
     issuable upon the conversion of the Notes and/or Preferred
     Shares.  The Company will, from time to time, in accordance with
     the laws of the State of Delaware, increase the authorized amount
     of Common Stock and preferred stock if at any time the number of
     shares of Common Stock or preferred stock remaining unissued and
     available for issuance shall be insufficient to permit conversion
     of the Notes and/or Preferred Shares and the exchange of the
     Notes.

                                ARTICLE VIII

               RESTRICTIONS ON TRANSFERABILITY OF SECURITIES

               SECTION 8.1.  RESTRICTIONS ON TRANSFERABILITY.  The
     Notes, the Preferred Shares and any shares of Common Stock
     issuable upon conversion of the Notes and/or Preferred Shares
     shall not be transferable except upon the conditions specified in
     Section 8.3 or pursuant to the Registration Rights Agreement.  

               SECTION 8.2.  RESTRICTIVE LEGEND.  Each certificate
     representing (a) the Notes, (b) the Preferred Shares, (c) shares
     of the Common Stock issued upon conversion of any Note and/or
     Preferred Share, and (d) any other securities issued in respect
     of the Notes, the Preferred Shares or Common Stock issued upon
     conversion of any Note and/or Preferred Share upon any stock
     split, stock dividend, recapitalization, merger, consolidation or
     similar event (each of the foregoing securities in (a) through
     (d) being referred to herein as "Restricted Securities"), shall
     (unless otherwise permitted by the provisions of Section 8.3
     below) be stamped or otherwise imprinted with a legend
     substantially in the following form (in addition to the legend
     required under any applicable state securities laws):

               THE [SHARES] [NOTE] REPRESENTED BY THIS
          CERTIFICATE [HAVE] [HAS] BEEN ACQUIRED FOR INVESTMENT
          AND [HAVE] [HAS] NOT BEEN REGISTERED UNDER THE
          SECURITIES ACT OF 1933 OR ANY APPLICABLE STATE
          SECURITIES LAWS.  SUCH [SHARES] [NOTE] MAY NOT BE SOLD
          OR TRANSFERRED IN THE ABSENCE OF SUCH REGISTRATIONS OR
          EXEMPTIONS THEREFROM UNDER SAID ACT OR LAWS.  COPIES OF
          THE AGREEMENT COVERING THE PURCHASE OF [THESE SHARES]
          [THIS NOTE] AND RESTRICTING [THEIR] [ITS] TRANSFER MAY
          BE OBTAINED AT NO COST BY WRITTEN REQUEST MADE BY THE
          HOLDER OF RECORD OF THIS CERTIFICATE TO THE SECRETARY
          OF THE COMPANY.  

               SECTION 8.3.  NOTICE OF PROPOSED TRANSFERS.  Prior to
     any proposed transfer of any Restricted Securities, unless there
     is in effect a registration statement under the Securities Act
     covering the proposed transfer, the Purchaser shall give written
     notice to the Company of its intention to effect such transfer. 
     Each such notice shall describe the manner and circumstances of
     the proposed transfer in sufficient detail, and shall be
     accompanied by either (a) a written opinion of legal counsel (who
     shall be reasonably satisfactory to the Company) addressed to the
     Company to the effect that the proposed transfer of the
     Restricted Securities may be effected without registration under
     the Securities Act or (b) a "no action" letter from the
     Commission to the effect that the transfer of such securities
     without registration will not result in a recommendation by the
     staff of the Commission that action be taken with respect
     thereto, whereupon, in each case, the Purchaser shall be entitled
     to transfer such Restricted Securities in accordance with the
     terms of the notice delivered by the Purchaser to the Company. 
     Unless there is in effect a registration statement under the
     Securities Act covering the proposed transfer, each certificate
     evidencing the Restricted Securities transferred as herein
     provided shall bear the appropriate restrictive legend set forth
     in Section 8.2 above, except that such certificate shall not bear
     such restrictive legend if, (i) in the opinion of counsel for the
     Purchaser, such legend is not required in order to establish
     compliance with any provisions of the Securities Act, (ii) a
     period of at least three years has elapsed since the later of the
     date the Restricted Securities were acquired from the Company or
     from an affiliate of the Company, and the Purchaser represents to
     the Company that it is not an affiliate of the Company and has
     not been an affiliate during the preceding three months and shall
     not become an affiliate of the Company without resubmitting the
     Restricted Securities for reimposition of the legend, or (iii)
     the Restricted Securities have been sold pursuant to Rule 144(k)
     and the certificate is accompanied by a representation by the
     Purchaser that it is not an affiliate of the Company, has not
     been an affiliate during the three-month period prior to the sale
     and has held the Restricted Securities for more than three years.

               SECTION 8.4.  REGISTRATION RIGHTS AGREEMENT. 
     Concurrently with the execution and delivery of this Agreement,
     the Company and the Purchaser are entering into a Registration
     Rights Agreement which provides, among other things, for the
     registration, on the terms and conditions set forth therein, of
     the Restricted Securities.

                                 ARTICLE IX

                                TERMINATION

               Notwithstanding anything contained herein to the
     contrary, this Agreement may be terminated at any time prior to
     the Closing Date:  

               (a)  By the mutual written consent of the Purchaser and
     the Company;

               (b)  By the Purchaser or the Company if the Closing has
     not occurred on or before December 31, 1996 and this Agreement
     has not previously been terminated; provided, however, that the
     right to terminate the Agreement under this Section 9(b) shall
     not be available to any party whose failure to fulfill any
     obligation under this Agreement has been the cause of, or
     resulted in, the failure of the Closing to occur on or before
     such date.

               In the event that this Agreement shall be terminated
     pursuant to this Article IX, all further obligations of the
     parties under this Agreement shall be terminated without further
     liability of any party to any other party, provided that nothing
     herein shall relieve any party from liability for its willful
     breach of this Agreement.  

                                 ARTICLE X

                               MISCELLANEOUS

               SECTION 10.1.  GOVERNING LAW.  This Agreement shall be
     governed by and construed in accordance with the laws of the
     State of New York, without regard to the conflict of rules
     thereof.

               SECTION 10.2.  SURVIVAL.  The representations and
     warranties of the Company set forth in Section 3.5, Section 3.18,
     Section 3.19, the first sentence of Section 3.20, the first two
     sentences of Section 3.21(b)(i), and Section 3.21(b)(iii) shall
     survive the Closing for two years, but thereafter shall be of no
     further force or effect.  All other representations and
     warranties contained in this Agreement shall not survive the
     Closing.

               SECTION 10.3.  SUCCESSORS AND ASSIGNS.  Except as
     otherwise provided herein, the provisions hereof shall inure to
     the benefit of, and be binding upon, the successors and permitted
     assigns of the parties hereto.  No assignment of this Agreement
     may be made by either party at any time, whether or not by
     operation of law, without the other party's prior written
     consent, except that the Purchaser may assign any of its rights
     hereunder to an affiliate of the Purchaser without the Company's
     consent provided that such affiliate expressly assumes in writing
     all of the Purchaser's obligations hereunder.

               SECTION 10.4.  ENTIRE AGREEMENT; AMENDMENT.  This
     Agreement and the Transaction Documents constitute the full and
     entire understanding and agreement between the parties with
     regard to the subjects hereof and thereof.  Except as expressly
     provided herein, neither this Agreement nor any term hereof may
     be amended, waived, discharged or terminated other than by a
     written instrument signed by the party against whom enforcement
     of any such amendment, waiver, discharge or termination is
     sought.

               SECTION 10.5.  NOTICES, ETC.  All notices and other
     communications required or permitted hereunder shall be in
     writing and shall be mailed by registered or certified mail,
     postage prepaid, or otherwise delivered by hand or by messenger,
     addressed (a) if to the Purchaser, at 435 North Michigan Avenue,
     Chicago, Illinois 60611, Attention:  Mr. David D. Hiller, or at
     such other address as the Purchaser shall have furnished to the
     Company in writing and (b) if to the Company, at One Athenaeum
     Street, Cambridge, Massachusetts 02142, Attention:  Mr. Neal S.
     Winneg, or at such other address as the Company shall have
     furnished to the Purchaser in writing.  Each such notice or other
     communication shall for all purposes of this Agreement be treated
     as effective or having been given when delivered if delivered
     personally, or, if sent by mail, at the earlier of its receipt or
     72 hours after the same has been deposited in a regularly
     maintained receptacle for the deposit of the United States mail,
     addressed and postage prepaid as aforesaid.

               SECTION 10.6.  DELAYS OR OMISSIONS.  Except as
     expressly provided herein, no delay or omission to exercise any
     right, power or remedy accruing to the Company or the Purchaser
     upon any breach or default of any party under this Agreement,
     shall impair any such right, power or remedy of the Company or
     the Purchaser nor shall it be construed to be a waiver of any
     such breach or default, or an acquiescence therein, or of or in
     any similar breach or default thereafter occurring; nor shall any
     waiver of any single breach or default be deemed a waiver of any
     other breach or default theretofore or thereafter occurring.  Any
     waiver, permit, consent or approval of any kind or character on
     the part of the Company or the Purchaser of any breach or default
     under this Agreement, or any waiver on the part of any such party
     of any provisions or conditions of this Agreement, must be in
     writing and shall be effective only to the extent specifically
     set forth in such writing.  All remedies, either under this
     Agreement or by law or otherwise afforded to the Company or the
     Purchaser, shall be cumulative and not alternative.

               SECTION 10.7.  COUNTERPARTS.  This Agreement may be
     executed in any number of counterparts, each of which may be
     executed by only one of the parties hereto, each of which shall
     be enforceable against the party actually executing such
     counterpart, and all of which together shall constitute one
     instrument.

               SECTION 10.8.  SEVERABILITY.  In the event that any
     provision of this Agreement becomes or is declared by a court of
     competent jurisdiction to be illegal, unenforceable or void, this
     Agreement shall continue in full force and effect without said
     provisions; provided that no such severability shall be effective
     if it materially changes the economic benefit of this Agreement
     to any party.

               SECTION 10.9.  TITLES AND SUBTITLES.  The titles and
     subtitles used in this Agreement are used for convenience only
     and are not to be considered in construing or interpreting this
     Agreement.

               SECTION 10.10.  NO PUBLIC ANNOUNCEMENT.  Neither the
     Company nor the Purchaser shall, to the extent practicable,
     without consultation of the other, make any press release or
     other public announcement concerning the transactions
     contemplated by this Agreement except as and to the extent that
     any such party shall be obligated to make any such disclosure by
     law or by the rules, regulations or policies of any national
     securities exchange or association.


               IN WITNESS WHEREOF, each of the undersigned has caused
     the foregoing Agreement to be executed by one of its duly
     authorized officers as of the date first above written.

                              TRIBUNE COMPANY

                              By:  /s/ David D. Hiller         
                                   Name:  David D. Hiller
                                   Title: Senior Vice President 

                              SOFTKEY INTERNATIONAL, INC.

                              By:  /s/ Michael J. Perik          
                                   Name:  Michael J. Perik
                                   Title: Chairman and Chief Executive
                                            Officer



____________________________________________________________________________



               INDENTURE dated as of _________________________ between
     SOFTKEY INTERNATIONAL INC., a Delaware corporation (hereinafter
     sometimes called the "Company", as more fully set forth in Section
     1.1), and STATE STREET BANK AND TRUST COMPANY, a Massachusetts
     banking corporation (hereinafter sometimes called the "Trustee",
     as more fully set forth in Section 1.1).

                            W I T N E S S E T H

               WHEREAS, for its lawful corporate purposes, the Company
     has duly authorized the issuance of its 5 1/2% Senior
     Convertible/Exchangeable Notes Due 2000 (hereinafter sometimes
     called the "Notes"), in an aggregate principal amount not to
     exceed $150,000,000 and, to provide the terms and conditions upon
     which the Notes are to be authenticated, issued and delivered, the
     Company has duly authorized the execution and delivery of this
     Indenture; and

               WHEREAS, the Notes, the certificate of authentication to
     be borne by the Notes, a form of assignment, a form of option to
     require repurchase by the Company upon a Change of Control (as
     hereinafter defined), a form of conversion notice, a form of
     exchange notice, a form of certificate of designation of 5 1/2%
     Series C Convertible Preferred Stock for which the Notes are
     exchangeable, and a form of certificate of transfer to be borne by
     the Notes are to be substantially in the forms hereinafter
     provided for; and

               WHEREAS, all acts and things necessary to make the
     Notes, when executed by the Company and authenticated and
     delivered by the Trustee or a duly authorized authenticating
     agent, as in this Indenture provided, the valid, binding and legal
     obligations of the Company, and to constitute these presents a
     valid agreement according to its terms, have been done and
     performed, and the execution of this Indenture and the issuance
     hereunder of the Notes have in all respects been duly authorized.

               NOW, THEREFORE, THIS INDENTURE WITNESSETH:

               That in order to declare the terms and conditions upon
     which the Notes are, and are to be, authenticated, issued and
     delivered, and in consideration of the premises and of the
     purchase and acceptance of the Notes by the holders thereof, the
     Company covenants and agrees with the Trustee for the equal and
     proportionate benefit of the respective holders from time to time
     of the Notes (except as otherwise provided below), as follows:

                              ARTICLE I

                             DEFINITIONS

               Section 1.1  Definitions.  The terms defined in this
     Section 1.1 (except as herein otherwise expressly provided or
     unless the context otherwise requires) for all purposes of this
     Indenture and of any indenture supplemental hereto shall have the
     respective meanings specified in this Section 1.1.  All other
     terms used in this Indenture which are defined in the Trust
     Indenture Act (as hereinafter defined) or which are by reference
     defined in the Securities Act (as herein defined), except as
     herein otherwise expressly provided or unless the context
     otherwise requires, shall have the meanings assigned to such terms
     in said Trust Indenture Act and in said Securities Act as in force
     at the date of the execution of this Indenture.  The words
     "herein," "hereof," "hereunder" and words of similar import refer
     to this Indenture as a whole and not to any particular Article,
     Section or other Subdivision.  The terms defined in this Article
     include the plural as well as the singular.

               Accredited Investor:  The term "Accredited Investor"
     shall have the meaning given it in Rule 501(a) under the
     Securities Act.

               Acquisition Price:  The term "Acquisition Price" means
     the volume weighted average of the per share prices paid by a
     specified person or group in acquiring Voting Stock.

               Affiliate:  The term "Affiliate" of any specified person
     shall mean an "affiliate" as defined in Rule 144(a) as promulgated
     under the Securities Act.

               Board of Directors:  The term "Board of Directors" shall
     mean the Board of Directors of the Company or a committee of such
     Board duly authorized to act for it hereunder.

               Board Resolution:  The term "Board Resolution" means a
     copy of a resolution certified by the Secretary or an Assistant
     Secretary of the Company to have been duly adopted by the Board of
     Directors, or a duly authorized committee thereof (to the extent
     permitted by applicable law), and to be in full force and effect
     on the date of such certification, and delivered to the Trustee.

               Business Day:  The term "Business Day" shall mean a day,
     other than a Saturday, a Sunday or other day on which the banking
     institutions in the State of New York, the State of California or
     the Commonwealth of Massachusetts are authorized or obligated by
     law or executive order to close or a day which is declared a
     national or New York, California or Massachusetts state holiday.

               Change of Control:  The term "Change of Control" means
     an event or series of events pursuant to which (i) any "person" or
     "group" (as such terms are used in Sections 13(d) and 14(d) of the
     Exchange Act) acquires beneficial ownership (as determined in
     accordance with Rule 13d-3 under the Exchange Act), directly or
     indirectly, of more than 50% of the total voting Stock of the
     Company at an Acquisition Price less than the conversion price
     then in effect with respect to the Notes and (ii) holders of
     Common Stock receive consideration which is not all or
     substantially all common stock that is (or upon consummation of
     or immediately following such event or events will be) listed on a
     United States national securities exchange or approved for
     quotation on the Nasdaq National Market or any similar United
     States system of automated dissemination of quotations of
     securities prices; provided, however, that any such person or
     group shall not be deemed to be the beneficial owner of, or to
     beneficially own, any Voting Stock tendered into a tender offer
     until such tendered voting Stock is accepted for purchase under
     the tender offer.

               Commission:  The term "Commission" shall mean the
     Securities and Exchange Commission.

               Common Stock:  The term "Common Stock" shall mean any
     stock of any class of the Company which has no preference in
     respect of dividends or of amounts payable in the event of any
     voluntary or involuntary liquidation, dissolution or winding up of
     the Company and which is not subject to redemption by the Company. 
     Subject to the provisions of Section 15.6, however, shares
     issuable on conversion of Notes shall include only shares of the
     class designated as common stock of the Company at the date of
     this Indenture or shares of any class or classes resulting from
     any reclassification or reclassifications thereof and which have
     no preference in respect of dividends or of amounts payable in the
     event of any voluntary or involuntary liquidation, dissolution or
     winding up of the Company and which are not subject to redemption
     by the Company; provided that if at any time there shall be more
     than one such resulting class, the shares of each such class then
     so issuable shall be substantially in the proportion which the
     total number of shares of such class resulting from all such
     reclassifications bears to the total number of shares of all such
     classes resulting from all such reclassifications.

               Company:  The term "Company" shall mean SoftKey
     International Inc., a Delaware corporation, and subject to the
     provisions of Article XII, shall include its successors and
     assigns.

               Conversion Price:  The term "Conversion Price" shall
     have the meaning specified in Section 15.4.

               Corporate Trust Office of the Trustee:  The term
     "Corporate Trust office of the Trustee," or other similar term,
     shall mean the office of the Trustee at which at any particular
     time its corporate trust business shall be principally
     administered, which office is, at the date as of which this
     Indenture is dated, located at 225 Franklin Street, Boston,
     Massachusetts 02110 (Attention: Corporate Trust Department).

               Custodian:  The term "Custodian" means State Street Bank
     and Trust Company, as custodian with respect to the Notes in
     global form, or any successor entity thereto.

               Default:  The term "default" shall mean any event that
     is, or after notice or passage of time, or both, would be, an
     Event of Default.

               Depositary:  The term "Depositary" means, with respect
     to the Notes issuable or issued in whole or in part in global
     form, the person specified in Section 2.5(d) as the Depositary
     with respect to the Notes, until a successor shall have been
     appointed and become such pursuant to the applicable provisions of
     this Indenture, and thereafter, "Depositary" shall mean or include
     such successor.

               Exchange Act:  The term "Exchange Act" means the
     Securities Exchange Act of 1934, as amended, and the rules and
     regulations promulgated thereunder.

               Exchange Price:  The term "Exchange Price" shall have
     the meaning specified in Section 17.4.

               Event of Default:  The term "Event of Default" shall
     mean any event specified in Section 7.1(a), (b), (c), (d) or (e).

               Indenture:  The term "Indenture" shall mean this
     instrument as originally executed or, if amended or supplemented
     as herein provided, as so amended or supplemented.

               Note or Notes:  The terms "Note" or "Notes" shall mean
     any Note or Notes, as the case may be, authenticated and delivered
     under this Indenture.

               Noteholder; holder:  The terms "Noteholder" or "holder"
     as applied to any Note, or other similar terms (but excluding the
     term "beneficial holder"), shall mean any person in whose name at
     the time a particular Note is registered on the Note registrar's
     books.

               Note register:  The term "Note register" shall have the
     meaning specified in Section 2.5.

               Officers' Certificate:  The term "Officers'
     Certificate," when used with respect to the Company, shall mean a
     certificate signed by the President, the Chief Executive officer,
     the Chief Financial officer or any Vice President or the Secretary
     or any Assistant Secretary of the Company, which is delivered to
     the Trustee.  Each such certificate shall include the statements
     provided for in Section 16.5 if and to the extent required by the
     provisions of such Section.

               Opinion of Counsel:  The term "Opinion of Counsel" shall
     mean an opinion in writing signed by legal counsel, who may be an
     employee of or counsel to the Company or other counsel acceptable
     to the Trustee, which is delivered to the Trustee.  Each such
     opinion shall include the statements provided for in Section 16.5
     if and to the extent required by the provisions of such Section.

               Outstanding:  The term "outstanding," when used with
     reference to Notes, shall, subject to the provisions of Section
     9.4, mean, as of any particular time, all Notes authenticated and
     delivered by the Trustee under this Indenture, except

               (a)  Notes theretofore canceled by the Trustee or
     delivered to the Trustee for cancellation;

               (b)  Notes, or portions thereof, for which monies in the
     necessary amount shall have been deposited in trust with the
     Trustee for payment or redemption; provided that if such Notes are
     to be redeemed prior to the maturity thereof, notice of such
     redemption shall have been given as in Article III provided, or
     provision satisfactory to the Trustee shall have been made for
     giving such notice;

               (c)  Notes in lieu of or in substitution for which other
     Notes shall have been authenticated and delivered pursuant to the
     terms of Section 2.6 unless proof satisfactory to the Trustee is
     presented that any such Notes are held by bona fide holders in due
     course; and

               (d)  Notes converted into Common Stock pursuant to
     Article XV or exchanged for Preferred Stock pursuant to
     Article XVII and Notes not deemed outstanding pursuant to Section
     3.2.

               Person:  The term "person" shall mean a corporation, an
     association, a partnership, an individual, a joint venture, a
     joint stock company, a trust, an unincorporated organization or a
     government or an agency or a political subdivision thereof.

               PORTAL Market:  The term "PORTAL Market" shall mean the
     Private Offerings, Resales and Trading through Automated Linkages
     market operated by the National Association of Securities Dealers,
     Inc. or any successor thereto.

               Predecessor Note:  The term "Predecessor Note" of any
     particular Note shall mean every previous Note evidencing all or a
     portion of the same debt as that evidenced by such particular
     Note; and, for the purposes of this definition, any Note
     authenticated and delivered under Section 2.6 in lieu of a lost,
     destroyed or stolen Note shall be deemed to evidence the same debt
     as the lost, destroyed or stolen Note.

               Preferred Stock:  The term "Preferred Stock" shall mean
     the 5 1/2% Series C Convertible Preferred Stock whose terms are
     initially set forth in the form of the Certificate of Designation
     attached hereto as Exhibit C, for which the Notes are exchangeable
     in accordance with Article XVII.

               QIB:  The term "QIB" shall mean a "qualified
     institutional buyer" as defined in Rule 144A (as hereinafter
     defined).

               Responsible Officer:  The term "Responsible Officer,"
     when used with respect to the Trustee, shall mean an officer of
     the Trustee assigned and duly authorized by the Trustee to
     administer its corporate trust matters.

               Restricted Securities:  The term "Restricted Securities"
     has the meaning specified in Section 2.5(d).

               Rule 144A:  The term "Rule 144A" shall mean Rule 144A as
     promulgated under the Securities Act.

               Securities Act:  The term "Securities Act" means the
     Securities Act of 1933, as amended, and the rules and regulations
     promulgated thereunder.

               Subsidiary:  The term "subsidiary" of any specified
     person shall mean (i) a corporation a majority of whose capital
     stock with voting power under ordinary circumstances, to elect
     directors is at the time directly or indirectly owned by such
     person or (ii) any other person (other than a corporation) in
     which such person or such person and a subsidiary or subsidiaries
     of such person or a subsidiary or subsidiaries of such person
     directly or indirectly, at the date of determination thereof, has
     at least majority ownership.

               Successor Company:  The term "Successor Company" shall
     have the meaning specified in Section 12.1.

               Trust Indenture Act:  The term "Trust Indenture Act"
     shall mean the Trust Indenture Act of 1939, as amended, as it was
     in force at the date of execution of this Indenture, except as
     provided in Sections 11.3, 15.6 and 17.6; provided, however, that
     in the event said Trust Indenture Act of 1939 is amended after the
     date hereof, the term "Trust Indenture Act" shall mean, to the
     extent required by such amendment, said Trust Indenture Act of
     1939 as so amended.

               Trustee:  The term "Trustee" shall mean State Street
     Bank and Trust Company, its successors and any corporation
     resulting from or surviving any consolidation or merger to which
     it or its successors may be a party and any successor trustee at
     the time serving as successor trustee hereunder.

               U.S. Government Obligations:  The term "U.S. Government
     Obligations" means securities that are (i) direct obligations of
     the United States of America for the payment of which its full
     faith and credit is pledged or (ii) obligations of a Person
     controlled or supervised by, and acting as an agency or
     instrumentality of, the United States of America the timely
     payment of which is unconditionally guaranteed as a full faith and
     credit obligation by the United States of America, which, in
     either case, are not callable or redeemable at the option of the
     issuer hereof, and shall also include a Depositary receipt issued
     by a bank (as defined in Section 3(a)(2) of the Securities Act of
     1933, as amended) as custodian with respect to any such U.S.
     Government Obligation or a specific payment of principal or
     interest on any such U.S. Government Obligation held by such
     custodian for the account of the holder of such Depositary
     receipt; provided that (except as required by law) such custodian
     is not authorized to make any deduction from the amount payable to
     the holder of such Depositary receipt from any amount received by
     such custodian in respect of the U.S. Government Obligation or the
     specific payment of principal of or interest on the U.S.
     Government Obligation evidenced by such Depositary receipt.

               Voting Stock:  The term "Voting Stock" means stock of
     the class or classes pursuant to which the holders thereof have
     the general voting power under ordinary circumstances to elect at
     least a majority of the board of directors, managers or trustees
     of a corporation (irrespective of whether or not at the time stock
     of any other class or classes shall have or might have voting
     power by reason of the happening of any contingency).

               The definitions of certain other terms are as specified
     in Section 3.5 and Articles XV and XVII.

                                ARTICLE II

                  ISSUE, DESCRIPTION, EXECUTION, REGISTRATION
                             AND EXCHANGE OF NOTES

               Section 2.1 Designation, Amount and Issue of Notes.  The
     Notes shall be designated as "5 1/2% Senior Convertible/Exchange-
     able Notes Due 2000."  Notes not to exceed the aggregate principal
     amount of $150,000,000 upon the execution of this Indenture, or
     from time to time thereafter, may be executed by the Company and
     delivered to the Trustee for authentication, and the Trustee shall
     thereupon authenticate and deliver said Notes upon the written
     order of the Company, signed by its (a) Chief Executive Officer or
     President, and (b) Chief Financial Officer or Secretary or any
     Assistant Secretary, without any further action by the Company
     hereunder.

               Section 2.2 Form of Notes.  The Notes in definitive form
     and the Trustee's certificate of authentication to be borne by
     such Notes shall be substantially in the form set forth in Exhibit
     A, which is incorporated in and made a part of this Indenture. 
     The Notes may be issued in global form, substantially in the form
     of Exhibit B, which is incorporated in and made a part of this
     Indenture.

               Any of the Notes may have such letters, numbers or other
     marks of identification and such notations, legends and
     endorsements as the officers executing the same may approve
     (execution thereof to be conclusive evidence of such approval) and
     as are not inconsistent with the provisions of this Indenture, or
     as may be required to comply with any law or with any rule or
     regulation made pursuant thereto or with any rule or regulation of
     any stock exchange on which the Notes may be listed, or to conform
     to usage.  Any Note in global form shall represent such of the
     outstanding Notes as shall be specified therein and shall provide
     that it shall represent the aggregate amount of outstanding Notes
     from time to time endorsed thereon and that the aggregate amount
     of outstanding Notes represented thereby may from time to time be
     increased or reduced to reflect transfers or exchanges permitted
     hereby.  Any endorsement of a Note in global form to reflect the
     amount of any increase or decrease in the amount of outstanding
     Notes represented thereby shall be made by the Trustee or the
     Custodian, at the direction of the Trustee, in such manner and
     upon instructions given by the holder of such Notes in accordance
     with the Indenture.  Payment of principal of and interest and
     premium, if any, on any Note in global form shall be made to the
     holder of such Note.

               The terms and provisions contained in the forms of Notes
     attached as Exhibits A and B hereto shall constitute, and are
     hereby expressly made, a part of this Indenture and to the extent
     applicable, the Company and the Trustee, by their execution and
     delivery of this Indenture, expressly agree to such terms and
     provisions and to be bound thereby.

               Section 2.3  Date and Denomination of Notes; Payments of
     Interest.  The Notes shall be issuable in registered form without
     coupons in denominations of $1,000 principal amount and integral
     multiples thereof.  Every Note shall be dated the date of its
     authentication, shall bear interest from the applicable date and
     shall be payable semiannually on each May 1 and November 1,
     commencing May 1, 1996, as specified on the faces of the forms of
     Notes, attached as Exhibits A and B hereto.

               The person in whose name any Note (or its Predecessor
     Note) is registered at the close of business on any record date
     with respect to any interest payment date (including any Note that
     is converted after the record date and on or before the interest
     payment date) shall be entitled to receive the interest payable on
     such interest payment date notwithstanding the cancellation of
     such Note upon any transfer, exchange or conversion subsequent to
     the record date and prior to such interest payment date.  Interest
     may, at the option of the Company, be paid by check mailed to the
     address of such person on the registry kept for such purposes;
     provided that, with respect to any holder of Notes with an
     aggregate principal amount equal to or in excess of $5,000,000, at
     the request of such holder in writing to the Trustee on or before
     the record date preceding any interest payment date, interest on
     such holder's Notes shall be paid by wire transfer in immediately
     available funds.  The term "record date" with respect to any
     interest payment date shall mean the April 15 or October 15
     preceding said May 1 or November 1.

               Interest on the Notes shall be computed on the basis of
     a year of twelve 30-day months.

               Any interest on any Note which is payable, but is not
     punctually paid or duly provided for, on any said May 1 or
     November 1 (herein called "Defaulted Interest") shall forthwith
     cease to be payable to the Noteholder on the relevant record date
     by virtue of his having been such Noteholder; and such Defaulted
     Interest shall be paid by the Company, at its election in each
     case, as provided in clause (1) or (2) below:

               (1)  The Company may elect to make payment of any
     Defaulted Interest to the Persons in whose names the Notes (or
     their respective Predecessor Notes) are registered at the close of
     business on a special record date for the payment of such
     Defaulted Interest, which shall be fixed in the following manner. 
     The Company shall notify the Trustee in writing of the amount of
     Defaulted Interest to be paid on each Note and the date of the
     payment (which shall be not less than 25 days after the receipt by
     the Trustee of such notice, unless the Trustee shall consent to an
     earlier date), and at the same time, the Company shall deposit
     with the Trustee an amount of money equal to the aggregate amount
     to be paid in respect of such Defaulted Interest or shall make
     arrangements satisfactory to the Trustee for such deposit prior to
     the date of the proposed payment, such money when deposited to be
     held in trust for the benefit of the Persons entitled to such
     Defaulted Interest as in this clause provided.  Thereupon, the
     Trustee shall fix a special record date for the payment of such
     Defaulted Interest which shall be not more than 15 days and not
     less than 10 days prior to the date of the payment and not less
     than 10 days after the receipt by the Trustee of the notice of the
     proposed payment.  The Trustee shall promptly notify the Company
     of such special record date and, in the name and at the expense of
     the Company, shall cause notice of the payment of such Defaulted
     Interest and the special record date therefor to be mailed, first-
     class postage prepaid, to each Noteholder at his address as it
     appears in the Note register, not less than 10 days prior to such
     special record date.  Notice of the proposed payment of such
     Defaulted Interest and the special record date therefor having
     been so mailed, such Defaulted Interest shall be paid to the
     Persons in whose names the Notes (or their respective Predecessor
     Notes) were registered at the close of business on such special
     record date and shall no longer be payable pursuant to the
     following clause (2).

               (2)  The Company may make payment of any Defaulted
     Interest in any other lawful manner not inconsistent with the
     requirements of any securities exchange on which the Notes may be
     listed, and upon such notice as may be required by such exchange,
     if, after notice given by the Company to the Trustee of the
     proposed payment pursuant to this clause, such manner of payment
     shall be deemed practicable by the Trustee.

               Section 2.4  Execution of Notes.  The Notes shall be
     signed in the name and on behalf of the Company by the facsimile
     signature of its Chief Executive Officer, President or its Chief
     Financial Officer and attested by the facsimile signature of its
     Secretary or any of its Assistant Secretaries (which may be
     printed, engraved or otherwise reproduced thereon, by facsimile or
     otherwise).  Only such Notes as shall bear thereon a certificate
     of authentication substantially in the form set forth on the forms
     of Notes attached as Exhibits A and B hereto, manually executed by
     the Trustee (or an authenticating agent appointed by the Trustee
     as provided by Section 16.11), shall be entitled to the benefits
     of this Indenture or be valid or obligatory for any purpose.  Such
     certificate by the Trustee (or such an authenticating agent) upon
     any Note executed by the Company shall be conclusive evidence that
     the Note so authenticated has been duly authenticated and
     delivered hereunder and that the holder is entitled to the
     benefits of this Indenture.

               In case any officer of the Company who shall have signed
     any of the Notes shall cease to be such officer before the Notes
     so signed shall have been authenticated and delivered by the
     Trustee, or disposed of by the Company, such Notes nevertheless
     may be authenticated and delivered or disposed of as though the
     person who signed such Notes had not ceased to be such officer of
     the Company; and any Note may be signed on behalf of the Company
     by such persons as, at the actual date of the execution of such
     Note, shall be the proper officers of the Company, although at the
     date of the execution of this Indenture any such person was not
     such an officer.

               Section 2.5  Exchange and Registration of Transfer of
     Notes; Restrictions on Transfer; Depositary.

               (a)  The Company shall cause to be kept at the Corporate
     Trust Office of the Trustee a register (the register maintained in
     such office and in any other office or agency of the Company
     designated pursuant to Section 5.2 being herein sometimes
     collectively referred to as the "Note register") in which, subject
     to such reasonable regulations as it may prescribe, the Company
     shall provide for the registration of Notes and of transfers of
     Notes.  Such register shall be in written form or in any form
     capable of being converted into written form within a reasonable
     period of time.  The Trustee is hereby appointed "Note registrar"
     for the purpose of registering Notes and transfers of Notes as
     herein provided.  The Company may appoint one or more co-
     registrars.

               Upon surrender for registration of transfer of any Note
     to the Note registrar or any co-registrar and satisfaction of the
     requirements for such transfer set forth in this Section 2.5, the
     Company shall execute, and the Trustee shall authenticate and
     deliver, in the name of the designated transferee or transferees,
     one or more new Notes of any authorized denominations and of a
     like aggregate principal amount and bearing such restrictive
     legends as may be required by Section 2.5(d).

               Notes may be exchanged for other Notes of any authorized
     denominations and of a like aggregate principal amount, upon
     surrender of the Notes to be exchanged at any such office or
     agency.  Whenever any Notes are so surrendered for exchange, the
     Company shall execute, and the Trustee shall authenticate and
     deliver, the Notes which the Noteholder making the exchange is
     entitled to receive.

               All Notes presented or surrendered for registration of
     transfer or for exchange shall (if so required by the Company, the
     Trustee, the Note registrar or any co-registrar) be duly endorsed,
     or be accompanied by a written instrument of transfer in form
     satisfactory to the Company, and the Note shall be duly executed
     by the Noteholder thereof or his attorney duly authorized in
     writing.

               No service charge shall be charged to the Noteholder for
     any exchange or registration of transfer of Notes, but the Company
     may require payment of a sum sufficient to cover any tax,
     assessments or other governmental charges that may be imposed in
     connection therewith.

               None of the Company, the Trustee, the Note registrar or
     any co-registrar shall be required to exchange or register a
     transfer of (a) any Notes for a period of 15 days next preceding
     any selection of Notes to be redeemed or (b) any Notes called for
     redemption or, if a portion of any Note is selected or called for
     redemption, such portion thereof selected or called for redemption
     or (c) any Notes surrendered for conversion or exchange in
     accordance with Articles XV or XVII or, if a portion of any Note
     is surrendered for conversion or such exchange, such portion
     thereof surrendered for conversion or exchange or (d) any Notes
     surrendered for redemption pursuant to Section 3.5 or, if a
     portion of any Note is surrendered for redemption pursuant to
     Section 3.5, such portion thereof surrendered for redemption
     pursuant to Section 3.5.

               All Notes issued upon any transfer or exchange of Notes
     shall be the valid obligations of the Company, evidencing the same
     debt, and entitled to the same benefits under this Indenture as
     the Notes surrendered upon such registration of transfer or
     exchange.

               (b)  So long as the Notes are eligible for book-entry
     settlement with the Depositary, or unless otherwise required by
     law, all Notes to be traded on the PORTAL Market shall be
     represented by a Note in global form registered in the name of the
     Depositary or the nominee of the Depositary.  The transfer and
     exchange of beneficial interests in such Note in global form,
     which does not involve the issuance of a definitive Note, shall be
     effected through the Depositary (but not the Trustee or the
     Custodian) in accordance with this Indenture (including the
     restrictions on transfer set forth herein) and the procedures of
     the Depositary therefor.  Neither the Trustee nor the Custodian
     (in such respective capacities) will have any responsibility for
     the transfer and exchange of beneficial interests in such Note in
     global form that does not involve the issuance of a definitive
     Note.

               At any time at the request of the beneficial holder of
     an interest in a Note in global form, such beneficial holder shall
     be entitled to obtain a definitive Note upon written request to
     the Trustee and the Custodian in accordance with the standing
     instructions and procedures existing between the Depositary and
     the Custodian for the issuance thereof.  Upon receipt of any such
     request, the Trustee or the Custodian, at the direction of the
     Trustee, will cause, in accordance with the standing instructions
     and procedures existing between the Depositary and the Custodian,
     the aggregate principal amount of the Note in global form to be
     reduced and, following such reduction, the Company will execute
     and the Trustee will authenticate and deliver to such beneficial
     holder (or its nominee) a Note or Notes in the appropriate
     aggregate principal amount in the name of such beneficial holder
     (or its nominee) and bearing such restrictive legends as may be
     required by this Indenture.

               Any transfer of a beneficial interest in a Note in
     global form which cannot be effected through book-entry settlement
     must be effected by the delivery to the transferee (or its
     nominee) of a definitive Note or Notes registered in the name of
     the transferee (or its nominee) on the books maintained by the
     Trustee.  With respect to any such transfer, the Trustee or the
     Custodian, at the direction of the Trustee, will cause, in
     accordance with the standing instructions and procedures existing
     between the Depositary and the Custodian, the aggregate principal
     amount of the Note in global form to be reduced and, following
     such reduction, the Company will execute and the Trustee will
     authenticate and deliver to the transferee (or such transferee's
     nominee, as the case may be), a Note or Notes in the appropriate
     aggregate principal amount in the name of such transferee (or its
     nominee) and bearing such restrictive legends as may be required
     by this Indenture.  In connection with any such transfer, the
     Trustee or the Custodian, at the direction of the Trustee, may
     request such representations and agreements relating to the
     restrictions on transfer of such Note or Notes from such
     transferee (or such transferee's nominee) as the Trustee (or the
     Custodian) may reasonably require.

               (c)  So long as the Notes are eligible for book-entry
     settlement, or unless otherwise required by law, upon any transfer
     of a definitive Note to a QIB in accordance with Rule 144A, unless
     otherwise requested by the transferor, and upon receipt of the
     definitive Note or Notes being so transferred, together with a
     certification from the transferor that the transferee is a QIB (or
     other evidence satisfactory to the Trustee), the Trustee shall
     make or direct the Custodian to make, an endorsement on the Note
     in global form to reflect an increase in the aggregate principal
     amount of the Notes represented by the Note in global form, the
     Trustee shall cancel such definitive Note or Notes and cause, or
     direct the Custodian to cause, in accordance with the standing
     instructions and procedures existing between the Depositary and
     the Custodian, the aggregate principal amount of Notes represented
     by the Note in global form to be increased accordingly.

               Any Note in global form may be endorsed with or have
     incorporated in the text thereof such legends or recitals or
     changes not inconsistent with the provisions of this Indenture as
     may be required by the Custodian, the Depositary or by the
     National Association of Securities Dealers, Inc. in order for the
     Notes to be tradeable on the PORTAL Market or as may be required
     for the Notes to be tradeable on any other market developed for
     trading of securities pursuant to Rule 144A or required to comply
     with any applicable law or any regulation thereunder or with the
     rules and regulations of any securities exchange upon which the
     Notes may be listed or traded or to conform with any usage with
     respect thereto, or to indicate any special limitations or
     restrictions to which any particular Notes are subject.

               (d)  Every Note that bears or is required under this
     Section 2.5(d) to bear the legend set forth in this Section 2.5(d)
     (together with Preferred Stock issued upon exchange for all or a
     portion of such Note or any Common Stock issued upon conversion of
     the Notes and required to bear the legend set forth in Section
     2.5(e), collectively, the "Restricted Securities") shall be
     subject to the restrictions on transfer set forth in this Section
     2.5(d), unless such restrictions on transfer shall have been
     waived by the written consent of the Company or removed in
     accordance with the provisions of Section 2.5(f), and the holder
     of each such Restricted Security, by such holder's acceptance
     thereof, agrees to be bound by such restrictions on transfer.  As
     used in this Section 2.5(d), the term "transfer" encompasses any
     sale, pledge, transfer or other disposition of any Restricted
     Security.

               Until three years after the later of the original
     issuance date of any Note and the last date on which the Company
     or an Affiliate of the Company was the owner of such Note, any
     certificate evidencing such Note (and all securities issued in
     exchange therefor or substitution thereof, other than Preferred
     Stock, if any, issued in exchange therefor or Common Stock, if
     any, issued upon conversion thereof, which shall bear the legend
     set forth in Section 2.5(e), if applicable) shall bear a legend in
     substantially the following form, unless otherwise agreed by the
     Company (with notice thereof to the Trustee):

               THE NOTE EVIDENCED HEREBY HAS NOT BEEN REGISTERED UNDER
               THE U.S. SECURITIES ACT OF 1933, AS AMENDED (THE
               "SECURITIES ACT"), OR ANY STATE SECURITIES LAWS, AND MAY
               NOT BE OFFERED OR SOLD WITHIN THE UNITED STATES OR TO,
               OR FOR THE ACCOUNT OR BENEFIT OF, U.S. PERSONS EXCEPT AS
               SET FORTH IN THE FOLLOWING SENTENCE.  BY ACQUISITION
               HEREOF, THE HOLDER (1) REPRESENTS THAT (A) IT IS A
               "QUALIFIED INSTITUTIONAL BUYER" (AS DEFINED IN RULE 144A
               UNDER THE SECURITIES ACT) OR (B) IT IS AN INSTITUTIONAL
               "ACCREDITED INVESTOR" (AS DEFINED IN RULE 501(A)(1),
               (2), (3) OR (7) UNDER THE SECURITIES ACT)
               ("INSTITUTIONAL ACCREDITED INVESTOR") OR (C) IT IS NOT A
               U.S. PERSON AND IS ACQUIRING THE NOTE EVIDENCED HEREBY
               IN AN OFFSHORE TRANSACTION; (2) AGREES THAT IT WILL NOT
               PRIOR TO THE DATE THAT IS THREE YEARS AFTER THE LATER OF
               THE ORIGINAL ISSUANCE OF THE NOTE EVIDENCED HEREBY AND
               THE LAST DATE ON WHICH SOFTKEY INTERNATIONAL INC. (THE
               "COMPANY") OR ANY "AFFILIATE" (AS DEFINED IN RULE 144
               UNDER THE SECURITIES ACT) OF THE COMPANY WAS THE OWNER
               OF THE NOTE (THE "RESTRICTION TERMINATION DATE") RESELL
               OR OTHERWISE TRANSFER THE NOTE EVIDENCED HEREBY OR THE
               PREFERRED STOCK ISSUED UPON EXCHANGE OF SUCH NOTE OR THE
               COMMON STOCK ISSUABLE UPON CONVERSION OF SUCH NOTE
               EXCEPT (A) TO THE COMPANY OR ANY SUBSIDIARY THEREOF, (B)
               TO A QUALIFIED INSTITUTIONAL BUYER IN COMPLIANCE WITH
               RULE 144A UNDER THE SECURITIES ACT, (C) TO AN
               INSTITUTIONAL ACCREDITED INVESTOR THAT, PRIOR TO SUCH
               TRANSFER, FURNISHES TO STATE STREET BANK AND TRUST
               COMPANY, AS TRUSTEE, A SIGNED LETTER CONTAINING CERTAIN
               REPRESENTATIONS AND AGREEMENTS RELATING TO THE
               RESTRICTIONS ON TRANSFER OF THE NOTE EVIDENCED HEREBY
               (THE FORM OF WHICH LETTER CAN BE OBTAINED FROM SUCH
               TRUSTEE), (D) OUTSIDE THE UNITED STATES IN COMPLIANCE
               WITH RULE 904 UNDER THE SECURITIES ACT OR (E) PURSUANT
               TO THE EXEMPTION FROM REGISTRATION PROVIDED BY RULE 144
               UNDER THE SECURITIES ACT (IF AVAILABLE); AND (3) AGREES
               THAT IT WILL DELIVER TO EACH PERSON TO WHOM THE NOTE
               EVIDENCED HEREBY IS TRANSFERRED A NOTICE SUBSTANTIALLY
               TO THE EFFECT OF THIS LEGEND.  IN CONNECTION WITH ANY
               TRANSFER OF THE NOTE EVIDENCED HEREBY BEFORE THE
               RESTRICTION TERMINATION DATE, THE HOLDER MUST CHECK THE
               APPROPRIATE BOX SET FORTH ON THE REVERSE HEREOF RELATING
               TO THE MANNER OF SUCH TRANSFER AND SUBMIT THIS
               CERTIFICATE TO STATE STREET BANK AND TRUST COMPANY, AS
               TRUSTEE.  IF THE PROPOSED TRANSFER IS PURSUANT TO CLAUSE
               (C), (D) OR (E) ABOVE, THE HOLDER MUST, PRIOR TO SUCH
               TRANSFER, FURNISH TO STATE STREET BANK AND TRUST
               COMPANY, AS TRUSTEE, SUCH CERTIFICATIONS, LEGAL OPINIONS
               OR OTHER INFORMATION AS THE COMPANY MAY REASONABLY
               REQUIRE TO CONFIRM THAT SUCH TRANSFER IS BEING MADE
               PURSUANT TO AN EXEMPTION FROM, OR IN A TRANSACTION NOT
               SUBJECT TO, THE REGISTRATION REQUIREMENTS OF THE
               SECURITIES ACT.  THIS LEGEND WILL BE REMOVED UPON THE
               RESTRICTION TERMINATION DATE.  AS USED HEREIN, THE TERMS
               "OFFSHORE TRANSACTION," "UNITED STATES" AND "U.S.
               PERSON" HAVE THE MEANINGS GIVEN TO THEM BY REGULATION S
               UNDER THE SECURITIES ACT.

               Any Note (or security issued in exchange or substitution
     therefor) as to which such restrictions on transfer shall have
     expired in accordance with their terms may, upon satisfaction of
     the requirements of Section 2.5(f) and surrender of such Note for
     exchange to the Note registrar in accordance with the provisions
     of this Section 2.5, be exchanged for a new Note or Notes, of like
     tenor and aggregate principal amount, which shall not bear the
     restrictive legend required by this Section 2.5(d).

               Notwithstanding any other provisions of this Indenture
     (other than the provisions set forth in this Section 2.5(d)), a
     Note in global form may not be transferred as a whole except by
     the Depositary to a nominee of the Depositary or by a nominee of
     the Depositary to the Depositary or another nominee of the
     Depositary or by the Depositary or any such nominee to a successor
     Depositary or a nominee of such successor Depositary.

               The Depositary shall be a clearing agency registered
     under the Exchange Act.  The Company initially appoints The
     Depositary Trust Company to act as Depositary with respect to the
     Notes in global form.  Initially, the global Note shall be issued
     to the Depositary, registered in the name of Cede & Co., as the
     nominee of the Depositary, and deposited with the Trustee as
     Custodian for Cede & Co.

               If at any time the Depositary for the Note in global
     form notifies the Company that it is unwilling or unable to
     continue as Depositary for such Note, the Company may appoint a
     successor Depositary with respect to such Note.  If a successor
     Depositary for the Note is not appointed by the Company within 90
     days after the Company receives such notice, the Company will
     execute, and the Trustee, upon receipt of an Officers' Certificate
     for the authentication and delivery of Notes, will authenticate
     and deliver, Notes in definitive form, in an aggregate principal
     amount equal to the principal amount of the Note in global form,
     in exchange for such Note in global form.

               Definitive Notes issued in exchange for all or a part of
     a Note in global form pursuant to this Section 2.5(d) shall be
     registered in such names and in such authorized denominations as
     the Depositary, pursuant to instructions from its direct or
     indirect participants or otherwise, shall instruct the Trustee. 
     Upon execution and authentication, the Trustee shall deliver such
     definitive Notes to the persons in whose names such definitive
     Notes are so registered.

               At such time as all interests in a Note in global form
     have been redeemed, converted, repurchased or canceled, such Note
     in global form shall be, upon receipt thereof, canceled by the
     Trustee in accordance with standing procedures and instructions
     existing between the Depositary and the Custodian.  At any time
     prior to such cancellation, if any interest in a global Note is
     exchanged for definitive Notes, redeemed, converted, canceled or
     transferred to a transferee who receives definitive Notes therefor
     or any definitive Note is exchanged or transferred for part of a
     Note in global form, the principal amount of such Note in global
     form shall, in accordance with the standing procedures and
     instructions existing between the Depositary and the Custodian, be
     reduced or increased, as the case may be, and an endorsement shall
     be made on such Note in global form by the Trustee or the
     Custodian, at the direction of the Trustee, to reflect such
     reduction or increase.

               (e)  Until three years after the later of the original
     issuance date of any Note and the last date on which the Company
     or an Affiliate of the Company was the owner of such Note, any
     stock certificate representing Preferred Stock issued upon
     exchange of such Note or Common Stock issued upon conversion of
     such Note shall bear a legend in substantially the following form,
     including the bracketed material as appropriate, unless otherwise
     agreed by the Company (with written notice thereof to the Trustee
     and any transfer agent for the Common Stock):

               THE [COMMON][PREFERRED] STOCK EVIDENCED HEREBY HAS NOT
               BEEN REGISTERED UNDER THE U.S. SECURITIES ACT OF 1933,
               AS AMENDED (THE "SECURITIES ACT"), OR ANY STATE
               SECURITIES LAWS, AND MAY NOT BE OFFERED OR SOLD WITHIN
               THE UNITED STATES OR TO, OR FOR THE ACCOUNT OR BENEFIT
               OF U.S. PERSONS EXCEPT AS SET FORTH IN THE FOLLOWING
               SENTENCE. THE HOLDER HEREOF AGREES THAT PRIOR TO THE
               DATE THAT IS THREE YEARS AFTER THE LATER OF THE ORIGINAL
               ISSUANCE OF THE NOTE UPON THE [CONVERSION OF WHICH THE
               COMMON STOCK] [EXCHANGE FOR WHICH THE PREFERRED STOCK]
               EVIDENCED HEREBY WAS ISSUED AND THE LAST DATE ON WHICH
               SOFTKEY INTERNATIONAL INC. (THE "COMPANY") OR ANY
               "AFFILIATE" (AS DEFINED IN RULE 144 OF THE SECURITIES
               ACT) OF THE COMPANY WAS THE OWNER OF THE NOTE UPON THE
               [CONVERSION OF] [EXCHANGE FOR] WHICH THE [COMMON
               STOCK][PREFERRED STOCK] EVIDENCED HEREBY WAS ISSUED (THE
               "RESTRICTION TERMINATION DATE"), (1) IT WILL NOT RESELL
               OR OTHERWISE TRANSFER THE [COMMON STOCK] [PREFERRED
               STOCK] EVIDENCED HEREBY EXCEPT (A) TO THE COMPANY OR ANY
               SUBSIDIARY THEREOF, (B) TO A "QUALIFIED INSTITUTIONAL
               BUYER" IN COMPLIANCE WITH RULE 144A UNDER THE SECURITIES
               ACT, (C) TO AN INSTITUTIONAL "ACCREDITED INVESTOR" (AS
               DEFINED IN RULE 501(A)(1), (2), (3) OR (7) UNDER THE
               SECURITIES ACT) THAT PRIOR TO SUCH TRANSFER, FURNISHES
               TO THE FIRST NATIONAL BANK OF BOSTON, AS TRANSFER AGENT,
               A SIGNED LETTER CONTAINING CERTAIN REPRESENTATIONS AND
               AGREEMENTS RELATING TO THE RESTRICTIONS ON TRANSFER OF
               THE [COMMON STOCK] [PREFERRED STOCK] EVIDENCED HEREBY
               (THE FORM OF WHICH LETTER CAN BE OBTAINED FROM SUCH
               TRANSFER AGENT), (D) OUTSIDE THE UNITED STATES IN
               COMPLIANCE WITH RULE 904 UNDER THE SECURITIES ACT, (E)
               PURSUANT TO THE EXEMPTION FROM REGISTRATION PROVIDED BY
               RULE 144 UNDER THE SECURITIES ACT (IF AVAILABLE), OR (F)
               PURSUANT TO A REGISTRATION STATEMENT WHICH HAS BEEN
               DECLARED EFFECTIVE UNDER THE SECURITIES ACT; (2) PRIOR
               TO ANY SUCH TRANSFER PURSUANT TO CLAUSE (C), (D) OR (E)
               ABOVE, IT WILL FURNISH TO THE FIRST NATIONAL BANK OF
               BOSTON, AS TRANSFER AGENT, SUCH CERTIFICATIONS, LEGAL
               OPINIONS OR OTHER INFORMATION AS THE COMPANY MAY
               REASONABLY REQUIRE TO CONFIRM THAT SUCH TRANSFER IS
               BEING MADE PURSUANT TO AN EXEMPTION FROM, OR IN A
               TRANSACTION NOT SUBJECT TO, THE REGISTRATION
               REQUIREMENTS OF THE SECURITIES ACT; AND (3) IT WILL
               DELIVER TO EACH PERSON TO WHOM THE [COMMON
               STOCK][PREFERRED STOCK] EVIDENCED HEREBY IS TRANSFERRED
               A NOTICE SUBSTANTIALLY TO THE EFFECT OF THIS LEGEND. 
               THIS LEGEND WILL BE REMOVED UPON THE RESTRICTION
               TERMINATION DATE.  AS USED HEREIN, THE TERMS "UNITED
               STATES" AND "U.S. PERSON" HAVE THE MEANINGS GIVEN TO
               THEM BY REGULATION S UNDER THE SECURITIES ACT.

               Any such Preferred Stock or Common Stock as to which
     such restrictions on transfer shall have expired in accordance
     with their terms may, upon satisfaction of the requirements of
     Section 2.5(f) and surrender of the certificates representing such
     shares of Preferred Stock or Common Stock for exchange in
     accordance with the procedures of the transfer agent for the
     Common Stock or the Preferred Stock, as the case may be, be
     exchanged for a new certificate or certificates for a like
     aggregate number of shares of Preferred Stock or Common Stock, as
     the case may be, which shall not bear the restrictive legend
     required by this Section 2.5(e).  

               (f)  Upon any sale or transfer of any Restricted
     Security (including any interest in a Note in global form) (i)
     that is effected pursuant to an effective registration statement
     under the Securities Act, (ii) in the case of the Common Stock and
     Preferred Stock only, that is effected pursuant to Rule 144 as
     promulgated under the Securities Act or (iii) in connection with
     which the Trustee (or transfer agent for the Common Stock, in the
     case of shares of Common Stock of the Company or any transfer
     agent for the Preferred Stock in the case of shares of Preferred
     Stock) receives certificates and other information (including an
     Opinion of Counsel, if requested) reasonably acceptable to the
     Company and the Trustee (or such transfer agent, as the case may
     be) to the effect that such security will no longer be subject to
     the resale restrictions under federal and state securities laws,
     then (A) in the case of a Restricted Security in definitive form,
     the Note registrar or co-registrar (or transfer agent, in the case
     of Common stock of the Company or any transfer agent for the
     Preferred Stock in the case of shares of Preferred Stock) shall
     permit the holder thereof to exchange such Restricted Security for
     a security that does not bear the legends set forth in Section
     2.5(d) or 2.5(e), as applicable, and shall rescind any such
     restrictions on transfer and (B) in the case of Restricted
     Securities represented by a Note in global form, such Note shall
     no longer be subject to the restrictions contained in the legend
     set forth in Section 2.5(d) (but still subject to the other
     provisions hereof).  In addition, any Note (or security issued in
     exchange or substitution therefor) or shares of Preferred Stock
     issued upon exchange of any Note or shares of Common Stock issued
     upon conversion of any Note, in any case, as to which the
     restrictions on transfer described in the legends set forth in
     Section 2.5(d) and 2.5(e), respectively, have expired by their
     terms, may, upon surrender thereof (in accordance with the terms
     of this Indenture in the case of Notes) together with such
     certifications and other information (including an Opinion of
     Counsel having substantial experience in practice under the
     Securities Act and otherwise reasonably acceptable to the Company,
     addressed to the Company and the Trustee and in a form acceptable
     to the Company, to the effect that the transfer of such Restricted
     Security has been made in compliance with Rule 144 or such
     successor provision) acceptable to the Company and the Trustee (or
     any transfer agent, as the case may be) as either of them may
     reasonably require, be exchanged for a new Note or Notes of like
     tenor and aggregate principal amount (in the case of Notes), or a
     new certificate or certificates for a like aggregate number of
     shares of Preferred Stock (in the case of Preferred Stock) or
     Common Stock (in the case of Common Stock), or a new certificate
     or other instrument of like tenor and amount (in the case of
     securities issued in exchange or substitution for Notes), which
     shall not bear the restrictive legends set forth in Sections
     2.5(d) and 2.5(e).

               Section 2.6   Mutilated, Destroyed, Lost or Stolen
     Notes.  In case any Note shall become mutilated or be destroyed,
     lost or stolen, the Company in its discretion may execute, and
     upon its request, the Trustee or an authenticating agent appointed
     by the Trustee shall authenticate and deliver, a new Note, bearing
     a number not contemporaneously outstanding, in exchange and
     substitution for the mutilated Note, or in lieu of and in
     substitution for the Note so destroyed, lost or stolen.  The
     Company may charge such applicant for the expenses of the Company
     in replacing a Note.  In every case the applicant for a
     substituted Note shall furnish to the Company, to the Trustee and,
     if applicable, to such authenticating agent such security or
     indemnity as may be required by them to save each of them harmless
     from any loss, liability, cost or expense caused by or connected
     with such substitution, and in every case of destruction, loss or
     theft, the applicant shall also furnish to the Company, to the
     Trustee and, if applicable, to such authenticating agent evidence
     to their satisfaction of the destruction, loss or theft of such
     Note and of the ownership thereof.

               The Trustee or such authenticating agent may
     authenticate any such substituted Note and deliver the same upon
     the receipt of such security or indemnity as the Trustee, the
     Company and, if applicable, such authenticating agent may require.
     Upon the issuance of any substituted Note, the Company may require
     the payment of a sum sufficient to cover any tax or other
     governmental charge that may be imposed in relation thereto and
     any other expenses connected therewith.  In case any Note which
     has matured or is about to mature or has been called for
     redemption or is about to be converted into Common Stock shall
     become mutilated or be destroyed, lost or stolen, the Company may,
     instead of issuing a substitute Note, pay or authorize the payment
     of or convert or authorize the conversion of the same (without
     surrender thereof, except in the case of a mutilated Note), as the
     case may be, if the applicant for such payment or conversion shall
     furnish to the Company, to the Trustee and, if applicable, to such
     authenticating agent such security or indemnity as may be required
     by them to save each of them harmless from any loss, liability,
     cost or expense caused by or connected with such substitution, and
     in case of destruction, loss or theft, evidence satisfactory to
     the Company, the Trustee and, if applicable, any paying agent or
     conversion agent of the destruction, loss or theft of such Note
     and of the ownership thereof.

               Every substitute Note issued pursuant to the provisions
     of this Section 2.6 in lieu of any Note which is destroyed, lost
     or stolen shall constitute an additional contractual obligation of
     the Company, whether or not the destroyed, lost or stolen Note
     shall be enforceable by anyone, and shall be entitled to all the
     benefits (but shall be subject to all the limitations set forth
     in) this Indenture equally and proportionately with any and all
     other Notes duly issued hereunder.  To the extent permitted by
     law, all Notes shall be held and owned upon the express condition
     that the foregoing provisions are exclusive with respect to the
     replacement or payment or conversion of mutilated, destroyed, lost
     or stolen Notes and shall preclude any and all other rights or
     remedies notwithstanding any law or statute existing or hereafter
     enacted to the contrary with respect to the replacement or payment
     or conversion of negotiable instruments or other securities
     without their surrender.

               Section 2.7  Temporary Notes.  Pending the preparation
     of definitive Notes, the Company may execute and the Trustee or an
     authenticating agent appointed by the Trustee shall, upon written
     request of the Company, authenticate and deliver temporary Notes
     (printed or lithographed).  Temporary Notes shall be issuable in
     any authorized denomination and shall be substantially in the form
     of the definitive Notes but with such omissions, insertions and
     variations as may be appropriate for temporary Notes, all as may
     be determined by the Company.  Every such temporary Note shall be
     executed by the Company and authenticated by the Trustee or such
     authenticating agent upon the same conditions and in substantially
     the same manner, and with the same effect, as the definitive
     Notes.  Without unreasonable delay the Company will execute and
     deliver to the Trustee or such authenticating agent definitive
     Notes (other than in the case of Notes in global form) and
     thereupon any or all temporary Notes (other than any such Note in
     global form) may be surrendered in exchange therefor, at each
     office or agency maintained by the Company pursuant to Section 5.2
     and the Trustee or such authenticating agent shall authenticate
     and deliver in exchange for such temporary Notes an equal
     aggregate principal amount of definitive Notes.  Such exchange
     shall be made by the Company at its own expense and without any
     charge therefor.  Until so exchanged, the temporary Notes shall in
     all respects be entitled to the same benefits and subject to the
     same limitations under this Indenture as definitive Notes
     authenticated and delivered hereunder.

               Section 2.8  Cancellation of Notes Paid, Etc.  All Notes
     surrendered for the purpose of payment, redemption, conversion,
     exchange or registration of transfer shall, if surrendered to the
     Company or any paying agent or any Note registrar or any
     conversion agent, be surrendered to the Trustee and promptly
     canceled by it or, if surrendered to the Trustee, shall be
     promptly canceled by it and no Notes shall be issued in lieu
     thereof except as expressly permitted by any of the provisions of
     this Indenture.  Upon written instructions of the Company, the
     Trustee shall destroy canceled Notes, in accordance with the usual
     destruction procedures of the Trustee.  If the Company shall
     acquire any of the Notes, such acquisition shall not operate as a
     redemption or satisfaction of the indebtedness represented by such
     Notes unless and until the same are delivered to the Trustee for
     cancellation.

               Section 2.9  Ranking.  The Notes will represent general,
     unsecured obligations of the Company senior or pari passu in right
     of payment to all other unsecured obligations of the Company and
     will rank pari passu in order of preference with the Company's 5
     1/2% Senior Convertible Notes due 2000 issued October 23, 1995.

                              ARTICLE III

                           REDEMPTION OF NOTES

               Section 3.1  Redemption Prices.  The Company may, at its
     option, redeem all or from time to time any part of the Notes on
     any date prior to maturity, upon notice as set forth in Section
     3.2, and at the optional redemption prices set forth in the forms
     of Note attached as Exhibits A and B hereto, together with accrued
     interest to the date fixed for redemption, provided, however, that
     no such redemption shall be effected before November 2, 1998.

               Section 3.2  Notice of Redemption, Selection of Notes. 
     In case the Company shall desire to exercise the right to redeem
     all or, as the case may be, any part of the Notes pursuant to
     Section 3.1, it shall fix a date for redemption and, in the case
     of any redemption pursuant to Section 3.1, it or, at its request
     accompanied by the proposed form of notice of redemption (which
     must be received by the Trustee at least ten Business Days prior
     to the date the Trustee is requested to give notice as described
     below, unless a shorter period is agreed to by the Trustee), the
     Trustee in the name of and at the expense of the Company, shall
     mail or cause to be mailed a notice of such redemption at least 30
     and not more than 60 days prior to the date fixed for redemption
     to the holders of Notes so to be redeemed as whole or in part at
     their last addresses as the same appear on the registry books of
     the Company, provided that if the Company shall give such notice,
     it shall also give such notice, and notice of the Notes to be
     redeemed, to the Trustee.  Such mailing shall be by first class
     mail.  The notice, if mailed in the manner herein provided, shall
     be conclusively presumed to have been duly given, whether or not
     the holder receives such notice.  In any case, failure to give
     such notice by mail or any defect in the notice to the holder of
     any Note designated for redemption as a whole or in part shall not
     affect the validity of the proceedings for the redemption of any
     other Note.

               Each such notice of redemption shall specify the
     aggregate principal amount of Notes to be redeemed, the date fixed
     for redemption, the redemption price at which Notes are to be
     redeemed, the place or places of payment, that payment will be
     made upon presentation and surrender of such Notes, that interest
     accrued to the date fixed for redemption will be paid as specified
     in said notice and that on and after said date, interest thereon
     or on the portion thereof to be redeemed will cease to accrue. 
     Such notice shall also state the current Exchange Price and
     Conversion Price and the date on which the right to exchange and
     to convert such Notes or portions thereof into Preferred Stock or
     Common Stock, as the case may be, will expire.  If fewer than all
     the Notes are to be redeemed, the notice of redemption shall
     identify the Notes to be redeemed.  In case any Note is to be
     redeemed in part only, the notice of redemption shall state the
     portion of the principal amount thereof to be redeemed and shall
     state that on and after the date fixed for redemption, upon
     surrender of such Note, a new Note or Notes in principal amount
     equal to the unredeemed portion thereof will be issued.

               On or prior to the Business Day prior to the redemption
     date specified in the notice of redemption given as provided in
     this Section, the Company will deposit with the Trustee or with
     one or more paying agents (or, if the Company is acting as its own
     paying agent, set aside, segregate and hold in trust as provided
     in Section 5.4) an amount of money sufficient to redeem on the
     redemption date all the Notes so called for redemption (other than
     those theretofore surrendered for exchange for Preferred Stock or
     conversion into Common Stock) at the appropriate redemption price,
     together with accrued interest to the date fixed for redemption.
     If any Note called for redemption is exchanged or converted
     pursuant hereto, any money deposited with the Trustee or any
     paying agent or so segregated and held in trust for the redemption
     of such Note shall be paid to the Company upon its request or, if
     then held by the Company, shall be discharged from such trust. If
     fewer than all the Notes are to be redeemed, the Company will give
     the Trustee written notice in the form of an Officers' Certificate
     not fewer than 45 days (or such shorter period of time as may be
     acceptable to the Trustee) prior to the redemption date as to the
     aggregate principal amount of Notes to be redeemed.

               If fewer than all the Notes are to be redeemed, the
     Trustee shall select the Notes or portions thereof to be redeemed
     (in principal amounts of $1,000 or integral multiples thereof), by
     lot or, in its sole discretion, on a pro rata basis.  If any Note
     selected for partial redemption is exchanged or converted in part
     after such selection, the converted or exchanged portion of such
     Note shall be deemed (so far as may be) to be the portion to be
     selected for redemption.  The Notes (or portions thereof) so
     selected shall be deemed duly selected for redemption for all
     purposes hereof, notwithstanding that any such Note is exchanged
     or converted as a whole or in part before the mailing of the
     notice of redemption.

               Upon any redemption of less than all Notes, the Company
     and the Trustee may treat as outstanding any Notes surrendered for
     exchange or conversion during the period of 15 days next preceding
     the mailing of a notice of redemption and need not treat as
     outstanding any Note authenticated and delivered during such
     period in exchange for the unexchanged or unconverted portion of
     any Note exchanged or converted in part during such period. 

               Section 3.3  Payment of Notes Called for Redemption.  If
     notice of redemption has been given as above provided, the Notes
     or portion of Notes with respect to which such notice has been
     given shall, unless exchanged for Preferred Stock or converted
     into Common Stock pursuant to the terms hereof, become due and
     payable on the date and at the place or places stated in such
     notice at the applicable redemption price, together with interest
     thereon accrued to the date fixed for redemption, and on and after
     said date (unless the Company shall default in the payment of such
     Notes at the redemption price, together with interest thereon
     accrued to said date), interest on the Notes or portion of Notes
     so called for redemption shall cease to accrue, and such Notes
     shall cease after the close of business on the Business Day next
     preceding the date fixed for redemption to be exchangeable for
     Preferred Stock or convertible into Common Stock and, except as
     provided in Sections 8.5 and 13.4, to be entitled to any benefit
     or security under this Indenture, and the holders thereof shall
     have no right in respect of such Notes except the right to receive
     the redemption price thereof and unpaid interest thereon to the
     date fixed for redemption.  On presentation and surrender of such
     Notes at a place of payment in said notice specified, the said
     Notes or the specified portions thereof shall be paid and redeemed
     by the Company at the applicable redemption price, together with
     interest accrued thereon to the date fixed for redemption;
     provided that any semi-annual payment of interest becoming due on
     the date fixed for redemption shall be payable to the holders of
     such Notes registered as such on the relevant record date subject
     to the terms and provisions of Section 2.3 hereof.

               Upon presentation of any Note redeemed in part only, the
     Company shall execute and the Trustee shall authenticate and
     deliver to the holder thereof, at the expense of the Company, a
     new Note or Notes, of authorized denominations, in principal
     amount equal to the unredeemed portion of the Notes so presented.

               Notwithstanding the foregoing, the Trustee shall not
     redeem any Notes or mail any notice of optional redemption during
     the continuance of a default in payment of interest or premium on
     the Notes or of any Event of Default of which, in the case of any
     Event of Default other than under Section 7.1(a) or (b), a
     Responsible Officer of the Trustee has knowledge.  If any Note
     called for redemption shall not be so paid upon surrender thereof
     for redemption, the principal and premium, if any, shall, until
     paid or duly provided for, bear interest from the date fixed for
     redemption at the rate borne by the Note and such Note shall
     remain exchangeable for Preferred Stock and convertible into
     Common Stock until the principal and premium, if any, shall have
     been paid or duly provided for.

               Section 3.4  Conversion/Exchange Arrangement on Call for
     Redemption.  In connection with any redemption of Notes, the
     Company may arrange for the purchase and conversion or exchange of
     any Notes by an agreement with one or more investment bankers or
     other purchasers to purchase such Notes by paying to the Trustee
     in trust for the Noteholders, on or before the date fixed for
     redemption, an amount not less than the applicable redemption
     price, together with interest accrued to the date fixed for
     redemption, of such Notes.  Notwithstanding anything to the
     contrary contained in this Article III, the obligation of the
     Company to pay the redemption price of such Notes, together with
     interest accrued to the date fixed for redemption, shall be deemed
     to be satisfied and discharged to the extent such amount is so
     paid by such purchasers.  If such an agreement is entered into, a
     copy of which will be filed with the Trustee prior to the date
     fixed for redemption, any Notes not duly surrendered for
     conversion or exchange by the holders thereof may, at the option
     of the Company, be deemed, to the fullest extent permitted by law,
     acquired by such purchasers from such holders and (notwithstanding
     anything to the contrary contained in Articles XV or XVII)
     surrendered by such purchasers for conversion or exchange, all as
     of immediately prior to the close of business on the date fixed
     for redemption (and the right to exchange or convert any such
     Notes shall be deemed to have been extended through such time),
     subject to payment of the above amount as aforesaid.  At the
     direction of the Company, the Trustee shall hold and dispose of
     any such amount paid to it in the same manner as it would monies
     deposited with it by the Company for the redemption of Notes. 
     Without the Trustee's prior written consent, no arrangement
     between the Company and such purchasers for the purchase and
     conversion or exchange of any Notes shall increase or otherwise
     affect any of the powers, duties, responsibilities or obligations
     of the Trustee as set forth in this Indenture, and the Company
     agrees to indemnify the Trustee from, and hold it harmless
     against, any loss, liability or expense arising out of or in
     connection with any such arrangement for the purchase and
     conversion or exchange of any Notes between the Company and such
     purchasers including the costs and expenses incurred by the
     Trustee in the defense of any claim or liability arising out of or
     in connection with the exercise or performance of any of its
     powers, duties, responsibilities or obligations under this
     Indenture.

               Section 3.5  Purchase of Notes Upon a Change of Control.

               (a)  If a Change of Control shall occur at any time,
     then each holder of Notes shall have the right to require that the
     Company purchase such holder's Notes in whole or in part in
     integral multiples of $1,000 at a purchase price (the "Change of
     Control Purchase Price") in cash in an amount equal to 101% of the
     principal amount of such Notes, plus accrued and unpaid interest
     thereon, if any, to the repurchase date (the "Change of Control
     Purchase Date") pursuant to the offer described below (the "Change
     of Control Offer") and in accordance with the other procedures set
     forth in this Indenture.

               (b)  Within 30 days following any Change of Control, the
     Company shall notify the Trustee thereof and give written notice
     of such Change of Control to each holder of Notes, by first-class
     mail, postage prepaid, at his address appearing in the Note
     register, stating, among other things: that a Change of Control
     has occurred; the Change of Control Purchase Price and the Change
     of Control Purchase Date (which shall be a business day no earlier
     than 30 days nor later than 60 days from the date such notice is
     mailed, or such later date as is necessary to comply with
     requirements under the Exchange Act); that any Note not tendered
     will continue to accrue interest and to have all of the benefits
     of this Indenture; that, unless the Company defaults in the
     payment of the Change of Control Purchase Price, any Notes
     accepted for payment pursuant to the Change of Control Offer shall
     cease to accrue interest after the Change of Control Purchase
     Date; and certain other procedures that a holder of Notes must
     follow to accept a Change of Control Offer or to withdraw such
     acceptance.

               (c)  The Company will comply with the applicable tender
     offer rules, including Rule 13e-4 under the Exchange Act, and any
     other applicable securities laws or regulations in connection with
     a Change of Control Offer.

               (d)  The Company will not, and will not permit any
     subsidiary to, create or permit to exist or become effective any
     restriction that would materially impair the ability of the
     Company to make a Change of Control offer to purchase the Notes
     or, if such Change of Control offer is made, to pay for the Notes
     tendered for purchase.

                             ARTICLE IV

                             [RESERVED]

                             ARTICLE V

                     PARTICULAR COVENANTS OF THE COMPANY

               Section 5.1  Payment of Principal, Premium and Interest. 
     The Company covenants and agrees that it will duly and punctually
     pay or cause to be paid the principal of and premium, if any, and
     interest on each of the Notes at the places, at the respective
     times and in the manner provided herein and in the Notes.  Each
     installment of interest on the Notes due on any semi-annual
     interest payment date may be paid by mailing checks for the
     interest payable to or upon the written order of the holders of
     Notes entitled thereto as they shall appear on the Note register;
     provided that, with respect to any holder of Notes with an
     aggregate principal amount equal to or in excess of $5,000,000, at
     the request of such holder in writing to the Trustee, interest on
     such holder's Notes shall be paid by wire transfer in immediately
     available funds.  An installment of principal or interest shall be
     considered paid on the date due if the Trustee or Paying Agent
     (other than the Company, a Subsidiary of the Company or any
     Affiliate of any of them) holds on that date money designated for
     and sufficient to pay the installment of principal or interest and
     is not prohibited from paying such money to the holders of the
     Notes pursuant to the terms of this Indenture.

               Section 5.2  Maintenance of Office or Agency.  The
     Company will maintain in the Borough of Manhattan, The City of New
     York, an office or agency where the Notes may be surrendered for
     registration of transfer or exchange or for presentation for
     payment or for exchange or conversion or redemption and where
     notices and demands to or upon the Company in respect of the Notes
     and this Indenture may be served.  The Company will give prompt
     written notice to the Trustee of the location, and any change in
     the location, of such office or agency not designated by the
     Trustee.  If at any time the Company shall fail to maintain any
     such office or agency or shall fail to furnish the Trustee with
     the address thereof, such presentations, surrenders, notices and
     demands may be made or served at the Corporate Trust office of the
     Trustee.

               The Company may also from time to time designate one or
     more other offices or agencies where the Notes may be presented or
     surrendered for any or all such purposes and may from time to time
     rescind such designations; provided that no such designation or
     rescission shall in any manner relieve the Company of its
     obligation to maintain an office or agency in the Borough of
     Manhattan, The City of New York, for such purposes.  The Company
     will give prompt written notice to the Trustee of any such
     designation or rescission and of any change in the location of any
     such other office or agency.

               The Company hereby initially designates the Trustee as
     paying agent, Note registrar and conversion and exchange agent and
     each of the Corporate Trust Office of the Trustee and the office
     of State Street Bank and Trust Company, N.A. in the Borough of
     Manhattan, The City of New York, as one such office or agency of
     the Company for the purposes set forth in the first paragraph of
     this Section 5.2.

               So long as the Trustee is the Note registrar, the
     Trustee agrees to mail, or cause to be mailed, the notices set
     forth in Section 8.10(a) and the third paragraph of Section 8.11.

               Section 5.3  Appointments to Fill Vacancies in Trustee's
     office.  The Company, whenever necessary to avoid or fill a
     vacancy in the office of Trustee, will appoint, in the manner
     provided in Section 8.10, a Trustee, so that there shall at all
     times be a Trustee hereunder.

               Section 5.4  Provisions as to Paying Agent.

               (a)  If the Company shall appoint a paying agent other
     than the Trustee, or if the Trustee shall appoint such a paying
     agent, it will cause such paying agent to execute and deliver to
     the Trustee an instrument in which such agent shall agree with the
     Trustee, subject to the provisions of this Section 5.4:

                    (1)  that it will hold all sums held by it as such
               agent for the payment of the principal of, premium, if
               any, or interest on the Notes (whether such sums have
               been paid to it by the Company or by any other obligor
               on the Notes) in trust for the benefit of the holders of
               the Notes;

                    (2)  that it will give the Trustee notice of any
               failure by the Company (or by any other obligor on the
               Notes) to make any payment of the principal of, premium,
               if any, or interest on the Notes when the same shall be
               due and payable; and

                    (3)  that at any time during the continuance of an
               Event of Default, upon request of the Trustee, it will
               forthwith pay to the Trustee all sums so held in trust.

               The Company shall, before each due date of the principal
     of, premium, if any, or interest on the Notes, deposit with the
     paying agent a sum sufficient to pay such principal, premium, if
     any, or interest, and (unless such paying agent is the Trustee)
     the Company will promptly notify the Trustee of any failure to
     take such action.

               (b)  If the Company shall act as its own paying agent,
     it will, on or before each due date of the principal of, premium,
     if any, or interest on the Notes, set aside, segregate and hold in
     trust for the benefit of the holders of the Notes a sum sufficient
     to pay such principal, premium, if any, or interest so becoming
     due and will notify the Trustee of any failure to take such action
     and of any failure by the Company (or any other obligor under the
     Notes) to make any payment of the principal of, premium, if any,
     or interest on the Notes when the same shall become due and
     payable.

               (c)  Anything in this Section 5.4 to the contrary
     notwithstanding, the Company may, at any time, for the purpose of
     obtaining a satisfaction and discharge of this Indenture, or for
     any other reason, pay or cause to be paid to the Trustee all sums
     held in trust by the Company or any paying agent hereunder as
     required by this Section 5.4, such sums to be held by the Trustee
     upon the trusts herein contained and upon such payment by the
     company or any paying agent to the Trustee, the Company or such
     paying agent shall be released from all further liability with
     respect to such sums.

               (d)  Anything in this section 5.4 to the contrary
     notwithstanding, the agreement to hold sums in trust as provided
     in this Section 5.4 is subject to Sections 13.3 and 13.4.

               Section 5.5  Corporate Existence.  Subject to Article
     XII, the Company will do or cause to be done all things necessary
     to preserve and keep in full force and effect its corporate
     existence.

               Section 5.6  Rule 144A Information Requirement.  During
     the three-year period following the original issuance date of any
     Note and during the three-year period following the last date on
     which the Company or an Affiliate of the Company was the owner of
     any Note (or shares of Common Stock issued upon conversion of any
     Note or Preferred Stock issued upon exchange of Notes), if the
     Company is subject neither to Section 13 nor Section 15(d) of the
     Exchange Act, the Company shall at the written request of any
     holder or beneficial holder of such Note (or shares of Preferred
     Stock issued upon exchange of Notes or Common Stock issued upon
     conversion of Notes) provide to such holder or beneficial holder
     of such Note (or shares of Common Stock issued upon conversion of
     Notes or Preferred Stock issued upon exchange of Notes) and any
     prospective transferee designated by such holder or beneficial
     holder of such Note (or shares of Preferred Stock issued upon
     exchange of Notes or Common Stock issued upon conversion of Notes)
     such information, if any, required by Rule 144A(d)(4) under the
     Securities Act (so long as such information is required to permit
     such transfer under Rule 144A).

               Section 5.7  Stay, Extension and Usury Laws.  The
     Company covenants (to the extent that it may lawfully do so) that
     it shall not at any time insist upon, plead or in any manner
     whatsoever claim or take the benefit or advantage of, any stay,
     extension or usury law or other law which would prohibit or
     forgive the Company from paying all or any portion of the
     principal of or interest on the Notes as contemplated herein,
     wherever enacted, now or at any time hereafter in force, or which
     may affect the covenants or the performance of this Indenture; and
     the Company (to the extent it may lawfully do so) hereby expressly
     waives all benefit or advantage of any such law, and covenants
     that it will not, by resort to any such law, hinder, delay or
     impede the execution of any power herein granted to the Trustee,
     but will suffer and permit the execution of every such power as
     though no such law has been enacted.

               Section 5.8  Amendments to Series C Preferred Stock. 
     Without the consent (evidenced as provided in Article IX) of the
     holders of not less than a majority in aggregate principal amount
     of the Notes at the time outstanding, the Company will not take
     any action with respect to its capital stock or adopt any change
     to the Certificate of Designation of the Series C Preferred Stock
     which in either such case would require the affirmative vote of
     the holders of at least 66-2/3% of the outstanding shares of
     Series C Preferred Stock under Section 3.2 of the Certificate of
     Designation (whether or not any such Series C Preferred Stock is
     at the time outstanding).

                                 ARTICLE VI

                       NOTEHOLDERS' LISTS AND REPORTS BY
                                THE COMPANY

               Section 6.1  Noteholders' Lists.  The Company covenants
     and agrees that it will furnish or cause to be furnished to the
     Trustee, semi-annually, not more than 15 days after April 15 and
     October 15 in each year beginning with April 15, 1996, and at such
     other times as the Trustee may request in writing, within 30 days
     after receipt by the Company of any such request (or such lesser
     time as the Trustee may reasonably request in order to enable it
     to timely provide any notice to be provided by it hereunder), a
     list in such form as the Trustee may reasonably require of the
     names and addresses of the holders of Notes as of a date not more
     than 15 days (or such other date as the Trustee may reasonably
     request in order to so provide any such notices) prior to the time
     such information is furnished, except that no such list need be
     furnished so long as the Trustee is acting as Note registrar or
     co-registrar.

               Section 6.2  Reports by Company.  The Company will
     deliver to the Trustee (a) as soon as available and in any event
     within 90 days after the end of each fiscal year of the Company
     (i) a consolidated balance sheet of the Company and its
     subsidiaries as of the end of such fiscal year and the related
     consolidated statements of operations, stockholders, equity and
     cash flows for such fiscal year, all reported on by an independent
     public accountant of nationally recognized standing and (ii) a
     report containing a management's discussion and analysis of the
     financial condition and results of operations and a description of
     the business and properties of the Company and (b) as soon as
     available and in any event within 45 days after the end of each of
     the first three quarters of each fiscal year of the Company (i) an
     unaudited consolidated financial report for such quarter and (ii)
     a report containing a management's discussion and analysis of the
     financial condition and results of operations of the Company;
     provided that the foregoing shall not be required for any fiscal
     year or quarter, as the case may be, with respect to which the
     Company files or expects to file with the Trustee an annual report
     or quarterly report, as the case may be, pursuant to the next
     paragraph of this Section 6.2.

               The Company shall file with the Trustee, within 15 days
     after it files such annual and quarterly reports with the
     Commission such annual and quarterly reports as are required to be
     filed by the Company with the Commission pursuant to Section 13 or
     15(d) of the Exchange Act.

                                 ARTICLE VII

                            DEFAULTS AND REMEDIES

               Section 7.1  Events of Default.  In case one or more of
     the following Events of Default (whatever the reason for such
     Event of Default and whether it shall be voluntary or involuntary
     or be effected by operation of law or pursuant to any judgment,
     decree or order of any court or any order, rule or regulation of
     any administrative or governmental body) shall have occurred and
     be continuing:

               (a)  default in the payment of any installment of
     interest upon any of the Notes as and when the same shall become
     due and payable, and continuance of such default for a period of
     30 days; or

               (b)  default in the payment of the principal of and
     premium, if any, on any of the Notes as and when the same shall
     become due and payable either at maturity or in connection with
     any redemption, by declaration or otherwise; or

               (c)  a failure on the part of the Company duly to
     observe or perform any other covenants or agreements on the part
     of the Company in the Notes or in this Indenture (other than a
     default in the performance or breach of a covenant or agreement
     which is specifically dealt with) elsewhere in this Section 7.1,
     which continues for a period of 90 days after the date on which
     written notice of such failure, requiring the Company to remedy
     the same, shall have been given to the Company by the Trustee, or
     to the Company and a Responsible Officer of the Trustee, by the
     holders of at least 25 percent in aggregate principal amount of
     the Notes at the time outstanding determined in accordance with
     Section 9.4; or

               (d)  the Company shall commence a voluntary case or
     other proceeding seeking liquidation, reorganization or other
     relief with respect to itself or its debts under any bankruptcy,
     insolvency or other similar law now or hereafter in effect, or
     seeking the appointment of a trustee, receiver, liquidator,
     custodian or other similar official of it or any substantial part
     of its property, or shall consent to any such relief or to the
     appointment of or taking possession by any such official in an
     involuntary case or other proceeding commenced against it or shall
     make a general assignment for the benefit of creditors or shall
     fail generally to pay its debts as they become due; or

               (e)  an involuntary case or other proceeding shall be
     commenced against the Company seeking liquidation, reorganization
     or other relief with respect to it or its debts under any
     bankruptcy, insolvency or other similar law now or hereafter in
     effect or seeking the appointment of a trustee, receiver,
     liquidator, custodian or other similar official of it or any
     substantial part of its property, and such involuntary case or
     other proceeding shall remain undismissed and unstayed for a
     period of 90 consecutive days; 

     then, and in each and every such case (other than an Event of
     Default specified in Section 7.1(d) or (e)), unless the principal
     of all of the Notes shall have already become due and payable,
     either the Trustee or the holders of not less than 25% in
     aggregate principal amount of the Notes then outstanding hereunder
     determined in accordance with Section 9.4, by notice in writing to
     the Company (and to the Trustee if given by Noteholders), may
     declare the principal of, premium, if any, on all the Notes and
     the interest accrued thereon to be due and payable immediately,
     and upon any such declaration the same shall become and shall be
     immediately due and payable, anything in this Indenture or in the
     Notes contained to the contrary notwithstanding.  If an Event of
     Default specified in Section 7.1(d) or (e) occurs and is
     continuing, the principal of all the Notes and the interest
     accrued thereon shall be immediately due and payable.  This
     provision, however, is subject to the conditions that if, at any
     time after the principal of the Notes shall have been so declared
     due and payable, and before any judgment or decree for the payment
     of the monies due shall have been obtained or entered as
     hereinafter provided, the Company shall pay or shall deposit with
     the Trustee a sum sufficient to pay all matured installments of
     interest upon all Notes and the principal of and premium, if any,
     on any and all Notes which shall have become due otherwise than by
     acceleration (with interest on overdue installments of interest
     (to the extent that payment of such interest is enforceable under
     applicable law) and on such principal and premium, if any, at the
     rate borne by the Notes, to the date of such payment or deposit)
     and amounts due to the Trustee pursuant to Section 8.6, and if any
     and all defaults under this Indenture, other than the nonpayment
     of principal of, premium, if any, and accrued interest on Notes
     which shall have become due by acceleration, shall have been cured
     or waived pursuant to Section 7.7, then and in every such case the
     holders of a majority in aggregate principal amount of the Notes
     then outstanding, by written notice to the Company and to the
     Trustee, may waive all defaults or Events of Default and rescind
     and annul such declaration and its consequences; but no such
     waiver or rescission and annulment shall extend to or shall affect
     any subsequent default or Event of Default, or shall impair any
     right consequent thereto.  The Company shall notify a Responsible
     Officer of the Trustee, promptly upon becoming aware thereof, of
     any Event of Default.

               In case the Trustee shall have proceeded to enforce any
     right under this Indenture and such proceedings shall have been
     discontinued or abandoned because of such waiver or rescission and
     annulment or for any other reason or shall have been determined
     adversely to the Trustee, then and in every such case the Company,
     the holders of Notes and the Trustee shall be restored
     respectively to their several positions and rights hereunder, and
     all rights, remedies and powers of the Company, the holders of
     Notes and the Trustee shall continue as though no such proceeding
     had been taken.

               Section 7.2  Payments of Notes on Default; Suit
     Therefor.  The Company covenants that (a) in case default shall be
     made in the payment of any installment of interest upon any of the
     Notes as and when the same shall become due and payable, and such
     default shall have continued for a period of 30 days, or (b) in
     case default shall be made in the payment of the principal of or
     premium, if any, on any of the Notes as and when the same shall
     have become due and payable, whether at maturity of the Notes or
     in connection with any redemption, by declaration or otherwise,
     then, upon demand of the Trustee, the Company will pay to the
     Trustee, for the benefit of the holders of the Notes, the whole
     amount that then shall have become due and payable on all such
     Notes for principal, premium, if any, or interest, or both, as the
     case may be, with interest upon the overdue principal, premium, if
     any, and (to the extent that payment of such interest is
     enforceable under applicable law) upon the overdue installments of
     interest at the rate borne by the Notes; and, in addition thereto,
     such further amount as shall be sufficient to cover the costs and
     expenses of collection, including reasonable compensation to the
     Trustee, its agents, attorneys and counsel, and any expenses or
     liabilities incurred by the Trustee hereunder other than through
     its negligence or bad faith.  Until such demand by the Trustee,
     the Company may pay the principal of and premium, if any, and
     interest on the Notes to the registered holders, whether or not
     the Notes are overdue.

               In case the Company shall fail forthwith to pay such
     amounts upon such demand, the Trustee, in its own name and as
     trustee of an express trust, shall be entitled and empowered to
     institute any actions or proceedings at law or in equity for the
     collection of the sums so due and unpaid and may prosecute any
     such action or proceeding to judgment or final decree, and may
     enforce any such judgment or final decree against the Company or
     any other obligor on the Notes and collect in the manner provided
     by law out of the property of the Company or any other obligor on
     the Notes wherever situated the monies adjudged or decreed to be
     payable.

               In the case there shall be pending proceedings for the
     bankruptcy or for the reorganization of the Company or any other
     obligor on the Notes under Title 11 of the United States Code or
     any other applicable law, or in case a receiver, assignee or
     trustee in bankruptcy or reorganization, liquidator, sequestrator
     or similar official shall have been appointed for or taken
     possession of the Company or such other obligor, the property of
     the Company or such other obligor, or in the case of any other
     judicial proceedings relative to the Company or such other obligor
     upon the Notes, or to the creditors or property of the Company or
     such other obligor, the Trustee, irrespective of whether the
     principal of the Notes shall then be due and payable as therein
     expressed or by declaration or otherwise and irrespective of
     whether the Trustee shall have made any demand pursuant to the
     provisions of this Section 7.2, shall be entitled and empowered,
     by intervention in such proceedings or otherwise, to file and
     prove a claim or claims for the whole amount of principal,
     premium, if any, and interest owing and unpaid in respect of the
     Notes and, in case of any judicial proceedings, to file such
     proofs of claim and other papers or documents as may be necessary
     or advisable in order to have the claims of the Trustee and of the
     Noteholders allowed in such judicial proceedings relative to the
     Company or any other obligor on the Notes, its or their creditors,
     or its or their property and to collect and receive any monies or
     other property payable or deliverable on any such claims and to
     distribute the same after the deduction of any amounts due the
     Trustee under Section 8.6; and any receiver, assignee or trustee
     in bankruptcy or reorganization, liquidator, custodian or similar
     official is hereby authorized by each of the Noteholders to make
     such payments to the Trustee and, in the event that the Trustee
     shall consent to the making of such payments directly to the
     Noteholders, to pay to the Trustee any amount due it for
     reasonable compensation, expenses, advances and disbursements,
     including counsel fees incurred by it up to the date of such
     distribution.  To the extent that such payment of reasonable
     compensation, expenses, advances and disbursements out of the
     estate in any such proceedings shall be denied for any reason,
     payment of the same shall be secured by a lien on, and shall be
     paid out of, any and all distributions, dividends, monies,
     securities and other property which the holders of the Notes may
     be entitled to receive in such proceedings, whether in liquidation
     or under any plan of reorganization or arrangement or otherwise.

               Nothing herein contained shall be deemed to authorize
     the Trustee to authorize or consent to or adopt on behalf of any
     Noteholder any plan of reorganization or arrangement affecting the
     Notes or the rights of any Noteholder, or to authorize the Trustee
     to vote in respect of the claim of any Noteholder in any such
     proceeding.

               All rights of action and of asserting claims under this
     Indenture, or under any of the Notes, may be enforced by the
     Trustee without the possession of any of the Notes or the
     production thereof on any trial or other proceeding relative
     thereto, and any such suit or proceeding instituted by the Trustee
     shall be brought in its own name as trustee of an express trust,
     and any recovery of judgment shall, after provision for the
     payment of the reasonable compensation, expenses, disbursements
     and advances of the Trustee, its agents and counsel, be for the
     ratable benefit of the holders of the Notes.

               In any proceedings brought by the Trustee (and in any
     proceedings involving the interpretation of any provision of this
     Indenture to which the Trustee shall be a party), the Trustee
     shall be held to represent all the holders of the Notes, and it
     shall not be necessary to make any holders of the Notes parties to
     any such proceedings.

               Section 7.3  Application of Monies Collected by Trustee. 
     Any monies collected by the Trustee pursuant to this Article VII
     shall be applied in the order following, at the date or dates
     fixed by the Trustee for the distribution of such monies, upon
     presentation of the several Notes and stamping thereon the
     payment, if only partially paid, and upon surrender thereof, if
     fully paid:

               First:    To the payment of all amounts due the Trustee
          under Section 8.6;

               Second:   Subject to the provisions of Article V, in
          case the principal of the outstanding Notes shall not have
          become due and be unpaid, to the payment of interest on the
          Notes in default in the order of the maturity of the
          installments of such interest, with interest (to the extent
          that such interest has been collected by the Trustee) upon
          the overdue installments of interest at the rate borne by the
          Notes, such payments to be made ratably to the persons
          entitled thereto; and

               Third:    Subject to the Provisions of Article V, in
          case the principal of the outstanding Notes shall have become
          due, by declaration or otherwise, and be unpaid, to the
          payment of the whole amount then owing and unpaid upon the
          Notes for principal, premium, if any, and interest, with
          interest on the overdue principal and premium, if any, and
          (to the extent that such interest has been collected by the
          Trustee) upon overdue installments of interest at the rate
          borne by the Notes; and in case such monies shall be
          insufficient to pay in full the whole amounts so due and
          unpaid upon the Notes, then to the payment of such principal,
          premium, if any, and interest without preference or priority
          of principal and premium, if any, over interest, or of
          interest over principal and premium, if any, or of any
          installment of interest over any other installment of
          interest, or of any Note over any other Note, ratably to the
          aggregate of such principal and premium, if any, and accrued
          and unpaid interest.

               Section 7.4  Proceedings by Noteholder.  No holder of
     any Note shall have any right by virtue of or by availing of any
     provision of this Indenture to institute any suit, action or
     proceeding in equity or at law upon or under or with respect to
     this Indenture, or for the appointment of a receiver, trustee,
     liquidator, custodian or other similar official, or for any other
     remedy hereunder, unless such holder previously shall have given
     to the Trustee written notice of an Event of Default and of the
     continuance thereof, as hereinbefore provided, and unless also the
     holders of not less than 25 percent in aggregate principal amount
     of the Notes then outstanding shall have made written request upon
     the Trustee to institute such action, suit or proceeding in its
     own name as Trustee hereunder and shall have offered to the
     Trustee such reasonable indemnity as it may require against the
     costs, expenses and liabilities to be incurred therein or thereby,
     and the Trustee for 60 days after its receipt of such notice,
     request and offer of indemnity, shall have neglected or refused to
     institute any such action, suit or proceeding, and no direction
     inconsistent with such written request shall have been given to
     the Trustee pursuant to Section 7.7; it being understood and
     intended, and being expressly covenanted by the taker and holder
     of every Note with every other taker and holder and the Trustee,
     that no one or more holders of Notes shall have any right in any
     manner whatever by virtue of or by availing of any provision of
     this Indenture to affect, disturb or prejudice the rights of any
     other holder of Notes, to obtain or seek to obtain priority over
     or preference to any other such holder or to enforce any right
     under this Indenture, except in the manner herein provided and for
     the equal, ratable and common benefit of all holders of Notes
     (except as otherwise provided herein).  For the protection and
     enforcement of this Section 7.4, each and every Noteholder and the
     Trustee shall be entitled to such relief as can be given either at
     law or in equity.

               Notwithstanding any other provision of this Indenture
     and any provision of any Note, the right of any holder of any Note
     to receive payment of the principal of, premium, if any, and
     interest on such Note, on or after the respective due dates
     expressed in such Note, or to institute suit for the enforcement
     of any such payment on or after such respective dates against the
     Company shall not be impaired or affected without the consent of
     such holder.

               Anything in this Indenture or the Notes to the contrary
     notwithstanding, the holder of any Note, without the consent of
     either the Trustee or the holder of any other Note, in his own
     behalf and for his own benefit, may enforce, and may institute and
     maintain any proceeding suitable to enforce, his rights of
     conversion as provided herein.

               Section 7.5  Proceedings by Trustee.  In case of an
     Event of Default, the Trustee may in its discretion proceed to
     protect and enforce the rights vested in it by this Indenture by
     such appropriate judicial proceedings as the Trustee shall deem
     most effectual to protect and enforce any of such rights, either
     by suit in equity or by action at law or by proceeding in
     bankruptcy or otherwise, whether for the specific enforcement of
     any covenant or agreement contained in this Indenture or in aid of
     the exercise of any power granted in this Indenture or to enforce
     any other legal or equitable right vested in the Trustee by this
     Indenture or by law.

               Section 7.6  Remedies Cumulative and Continuing.  Except
     as provided in Section 2.6, all powers and remedies given by this
     Article VII to the Trustee or to the Noteholders shall, to the
     extent permitted by law, be deemed cumulative and not exclusive of
     such powers and remedies or of any other powers and remedies
     available to the Trustee or the holders of the Notes, by judicial
     proceedings or otherwise, to enforce the performance or observance
     of the covenants and agreements contained in this Indenture, and
     no delay or omission of the Trustee or of any holder of any of the
     Notes to exercise any right or power accruing upon any default or
     Event of Default occurring and continuing as aforesaid shall
     impair any such right or power or shall be construed to be a
     waiver of any such default or any acquiescence therein; and,
     subject to the provisions of Section 7.4, every power and remedy
     given by this Article VII or by law to the Trustee or to the
     Noteholders may be exercised from time to time, and as often as
     shall be deemed expedient, by the Trustee or by the Noteholders.

               Section 7.7  Direction of Proceedings and Waiver of
     Defaults by Majority of Noteholders.  The holders of a majority in
     aggregate principal amount of the Notes at the time outstanding
     (determined in accordance with Section 9.4) shall have the right
     to direct the time, method and place of conducting any proceeding
     for any remedy available to the Trustee or exercising any trust or
     power conferred on the Trustee; provided, however, that (a) such
     direction shall not be in conflict with any rule of law or with
     this Indenture and (b) the Trustee may take any other action
     deemed proper by the Trustee which is not inconsistent with such
     direction.  The holders of a majority in aggregate principal
     amount of the Notes at the time outstanding (determined in
     accordance with Section 9.4) may on behalf of the holders of all
     of the Notes waive any past default or Event of Default hereunder
     and its consequences except (i) a default in the payment of
     interest or premium, if any, on, or the principal of, the Notes,
     (ii) a failure by the Company to exchange any Notes for Preferred
     Stock or to convert any Notes into Common Stock or (iii) a default
     in respect of a covenant or provisions hereof which under Article
     XI cannot be modified or amended without the consent of the
     holders of all Notes then outstanding.  Upon any such waiver, the
     Company, the Trustee and the holders of the Notes shall be
     restored to their former positions and rights hereunder; but no
     such waiver shall extend to any subsequent or other default or
     Event of Default or impair any right consequent thereon.  Whenever
     any default or Event of Default hereunder shall have been waived
     as permitted by this Section 7.7, said default or Event of Default
     shall for all purposes of the Notes and this Indenture be deemed
     to have been cured and to be not continuing; but no such waiver
     shall extend to any subsequent or other default or Event of
     Default or impair any right consequent thereon.

               Section 7.8  Notice of Defaults.  The Trustee shall,
     within 90 days after the occurrence of a default, mail to all
     Noteholders, as the names and addresses of such holders appear
     upon the registry books of the Company, notice of all defaults
     known to a Responsible Officer, unless such defaults shall have
     been cured or waived before the giving of such notice; and
     provided that, except in the case of default in the payment of the
     principal of, premium, if any, or interest on any of the Notes,
     the Trustee shall be protected in withholding such notice if and
     so long as a trust committee of directors and/or Responsible
     Officers of the Trustee in good faith determine that the
     withholding of such notice is in the interests of the Noteholders.

               Section 7.9  Undertaking to Pay Costs.  All parties to
     this Indenture agree, and each holder of any Note by his
     acceptance thereof shall be deemed to have agreed, that any court
     may, in its discretion, require, in any suit for the enforcement
     of any right or remedy under this Indenture, or in any suit
     against the Trustee for any action taken or omitted by it as
     Trustee, the filing by any party litigant in such suit of an
     undertaking to pay the costs of such suit and that such court may
     in its discretion assess reasonable costs, including reasonable
     attorneys' fees, against any party litigant in such suit, having
     due regard to the merits and good faith of the claims or defenses
     made by such party litigant; provided that the provisions of this
     Section 7.9 shall not apply to any suit instituted by the Trustee,
     to any suit instituted by any Noteholder or group of Noteholders
     holding in the aggregate more than ten percent in principal amount
     of the Notes at the time outstanding determined in accordance with
     Section 9.4 or to any suit instituted by any Noteholder for the
     enforcement of the payment of the principal of, premium, if any,
     or interest on any Note on or after the due date expressed in such
     Note or to any suit for the enforcement of the right to convert
     any Note in accordance with the provisions of Article XV or of the
     right to exchange any Note in accordance with the provisions of
     Article XVII.

                             ARTICLE VIII

                         CONCERNING THE TRUSTEE

               Section 8.1  Duties and Responsibilities of Trustee. (a)
     if an Event of Default has occurred and is continuing, the Trustee
     shall exercise the rights and powers vested in it by this
     Indenture and use the same degree of care and skill in its
     exercise as a prudent person would exercise or use under the
     circumstances in the conduct of such person's own affairs.

               (b)  Except during the continuance of an Event of
     Default:

                    (1)  the Trustee need perform only those duties
               that are specifically set forth in this Indenture and no
               others; and

                    (2)  in the absence of bad faith on its part, the
               Trustee may conclusively rely, as to the truth of the
               statements and the correctness of the opinions expressed
               therein, upon certificates or opinions furnished to the
               Trustee and conforming to the requirements of this
               Indenture; provided that the Trustee shall examine such
               certificates and opinions to determine whether or not
               they conform to the requirements of this Indenture.

               (c)  The Trustee may not be relieved from liability for
     its own negligent action, its own negligent failure to act or its
     own willful misconduct, except that:

                    (1)  this paragraph (c) does not limit the effect
               of paragraph (b) of this section 8.1;

                    (2)  the Trustee shall not be liable for any error
               of judgment made in good faith by an officer of the
               Trustee unless it is proved that the Trustee was
               negligent in ascertaining the pertinent facts; and

                    (3)  the Trustee shall not be liable with respect
               to any action it takes or omits to take in good faith in
               accordance with a direction received by it pursuant to
               Section 7.7.

               (d)  Every provision of this Indenture that in any way
     relates to the Trustee is subject to paragraphs (a), (b), (c) and
     (e) of this Section 8.1.

               (e)  The Trustee may refuse to perform any duty or
     exercise any right or power or extend or risk its own funds or
     otherwise incur any financial liability unless it receives
     indemnity satisfactory to it against any loss, liability or
     expense.

               Section 8.2  Reliance on Documents, Opinions, Etc. 
     Except as otherwise provided in Section 8.1:

               (a)  The Trustee may rely and shall be protected in
     acting upon any resolution, certificate, statement, instrument,
     opinion, report, notice, request, consent, order, bond, debenture,
     coupon or other paper or document believed by it in good faith to
     be genuine and to have been signed or presented by the proper
     party or parties;

               (b)  Any request, direction, order or demand of the
     Company mentioned herein shall be sufficiently evidenced by an
     Officers' Certificate (unless other evidence in respect thereof be
     herein specifically prescribed); and any resolution of the Board
     of Directors may be evidenced to the Trustee by a copy thereof
     certified by the Secretary or an Assistant Secretary of the
     Company;

               (c)  The Trustee may consult with counsel and any advice
     or Opinion of Counsel shall be full and complete authorization and
     protection in respect of any action taken or omitted by it
     hereunder in good faith and in accordance with such advice or
     Opinion of Counsel;

               (d)  The Trustee may execute any of the trusts or powers
     hereunder or perform any duties hereunder either directly or by or
     through agents or attorneys, and the Trustee shall not be
     responsible for any misconduct or negligence on the part of any
     agent or attorney appointed by it with due care hereunder; no
     Depositary, Custodian or paying agent who is not the Trustee shall
     be deemed an agent of the Trustee, and the Trustee (in its
     capacity as Trustee) shall not be responsible for any act or
     omission by any such Depositary, Custodian or paying agent;

               (e)  The Trustee shall be under no obligation to
     exercise any of the rights or powers vested in it by the Indenture
     at the request or direction of any of the holders pursuant to this
     Indenture unless such holders have offered the Trustee reasonable
     security or indemnity against the costs, expenses and liabilities
     which would be incurred by it in compliance with such request or
     direction.

               (f)  Subject to the provisions of Section 8.1(c), the
     Trustee shall not be liable for any action it takes or omits to
     take in good faith which it believes to be authorized or within
     its rights or powers;

               (g)  In connection with any request to transfer or
     exchange any Note, the Trustee may request a direction (in the
     form of an Officers' Certificate) from the Company and
     an Opinion of Counsel with respect to compliance with any
     restrictions on transfer or exchange imposed by this Indenture,
     the Securities Act, other applicable law or the rules and
     regulations of any exchange on which the Notes or the capital
     stock may be traded, and the Trustee may rely and shall be
     protected in acting upon such direction and in accordance with
     such Officers' Certificate and Opinion of Counsel;

               (h)  The Trustee may rely and shall be fully protected
     in acting upon the determination and notice by the Company of the
     Conversion Price, including any adjustment to the Conversion Price
     pursuant to Section 15.5(j); and

               (i)  The Trustee shall not be deemed to have knowledge
     of any Event of Default or other fact or event upon the occurrence
     of which it may be required to take action hereunder unless one of
     its Responsible Officers has actual knowledge thereof.

               Section 8.3  No Responsibility for Recitals, Etc.  The
     recitals contained herein and in the Notes (except in the
     Trustee's certificate of authentication) shall be taken as the
     statements of the Company, and the Trustee assumes no
     responsibility for the correctness of the same.  The Trustee makes
     no representations as to the validity or sufficiency of this
     Indenture or of the Notes.  The Trustee shall not be accountable
     for the use or application by the Company of any Notes or the
     proceeds of any Notes authenticated and delivered by the Trustee
     in conformity with the provisions of this Indenture.

               Section 8.4  Trustee, Paying Agents, Exchange Agents,
     Conversion Agents or Registrar May own Notes.  The Trustee, any
     paying agent, any exchange agent, any conversion agent or any Note
     registrar, in its individual or any other capacity, may become the
     owner or pledgee of Notes with the same rights it would have if it
     were not Trustee, paying agent, exchange agent, conversion agent
     or Note registrar.

               Section 8.5  Monies to Be Held in Trust.  Subject to the
     provisions of Section 13.4, all monies received by the Trustee
     shall, until used or applied as herein provided, be held in trust
     for the purposes for which they were received.  Money held by the
     Trustee in trust hereunder need not be segregated from other funds
     except to the extent required by law.  The Trustee shall be under
     no liability for interest on any money received by it hereunder
     except as may be agreed in writing from time to time by the
     Company and the Trustee.

               Section 8.6  Compensation and Expenses of Trustee.  The
     Company covenants and agrees to pay to the Trustee from time to
     time, and the Trustee shall be entitled to, reasonable
     compensation for all services rendered by it hereunder in any
     capacity (which shall not be limited by any provision of law in
     regard to the compensation of a trustee of an express trust), and
     the Company will pay or reimburse the Trustee upon its request for
     all reasonable expenses, disbursements and advances incurred or
     made by the Trustee in accordance with any of the provisions of
     this Indenture (including the reasonable compensation and the
     expenses and disbursements of its counsel and of all persons not
     regularly in its employ) except any such expense, disbursement or
     advance as may arise from its negligence or bad faith.  The
     Company also covenants to indemnify the Trustee in any capacity
     under this Indenture and its agents and any authenticating agent
     for, and to hold them harmless against, any loss, liability or
     expense incurred without negligence or bad faith on the part of
     the Trustee or such agent or authenticating agent, as the case may
     be, and arising out of or in connection with the acceptance or
     administration of this trust or in any other capacity hereunder,
     including the costs and expenses of defending themselves against
     any claim of liability in the premises.  The obligations of the
     Company under this Section 8.6 to compensate or indemnify the
     Trustee and to pay or reimburse the Trustee for expenses,
     disbursements and advances shall be secured by a lien prior to
     that of the Notes upon all property and funds held or collected by
     the Trustee as such, except funds held in trust for the benefit of
     the holders of particular Notes.  The obligation of the Company
     under this Section shall survive the satisfaction and discharge of
     this Indenture.

               Section 8.7  Officers' Certificate as Evidence.  Except
     as otherwise provided in Section 8.1, whenever in the
     administration of the provisions of this Indenture the Trustee
     shall deem it necessary or desirable that a matter be proved or
     established prior to taking or omitting any action hereunder, such
     matter (unless other evidence in respect thereof be herein
     specifically prescribed) may, in the absence of negligence or bad
     faith on the part of the Trustee, be deemed to be conclusively
     proved and established by an Officers' Certificate delivered to
     the Trustee, and such Officers' Certificate, in the absence of
     negligence or bad faith on the part of the Trustee, shall be full
     warrant to the Trustee for any action taken or omitted by it under
     the provisions of this Indenture upon the faith thereof.

               Section 8.8  Conflicting Interests of Trustee.  In the
     event that the Trust Indenture Act is applicable hereto, the
     Trustee has or shall acquire a conflicting interest within the
     meaning of the Trust Indenture Act and there exists an Event of
     Default hereunder (exclusive of any period of grace or requirement
     of notice), the Trustee shall either eliminate such interest or
     resign, to the extent and in the manner provided by, and subject
     to the provisions of, the Trust Indenture Act and this Indenture.

               Section 8.9  Eligibility of Trustee.  There shall at all
     times be a Trustee hereunder which shall be a person that is
     eligible pursuant to the Trust Indenture Act to act as such and
     has a combined capital and surplus of at least $50,000,000.  If
     such person publishes reports of condition at least annually,
     pursuant to law or to the requirements of any supervising or
     examining authority, then for the purposes of this Section, the
     combined capital and surplus of such person shall be deemed to be
     its combined capital and surplus as set forth in its most recent
     report of condition so published.  If at any time the Trustee
     shall cease to be eligible in accordance with the provisions of
     this Section, it shall resign immediately in the manner and with
     the effect hereinafter specified in this Article VIII.

               Section 8.10  Resignation or Removal of Trustee. (a) The
     Trustee may at any time resign by giving written notice of such
     resignation to the Company; and the Company shall mail, or cause
     to be mailed, notice thereof to the holders of Notes at their
     addresses as they shall appear on the registry books of the
     Company.  Upon receiving such notice of resignation, the Company
     shall promptly appoint a successor trustee by written instrument,
     in duplicate, executed by order of the Board of Directors, one
     copy of which instrument shall be delivered to the resigning
     Trustee and one copy to the successor trustee.  If no successor
     trustee have been so appointed and have accepted appointment 60
     days after the mailing of such notice of resignation to the
     Noteholders, the resigning Trustee may petition any court of
     competent jurisdiction for the appointment of a successor trustee,
     or any Noteholder who has been a bona fide holder of a Note or
     Notes for at least six months may, subject to the provisions of
     Section 7.9, on behalf of himself and all others similarly
     situated, petition any such court for the appointment of a
     successor trustee.  Such court may thereupon, after such notice,
     if any, as it may deem proper and prescribe, appoint a successor
     trustee.

               (b)  In case at any time any of the following shall
     occur:

                    (1)  the Trustee shall fail to comply with Section
          8.8 after written request therefor by the Company or by any
          Noteholder who has been a bona fide holder of a Note or Notes
          for at least six months; or

                    (2)  the Trustee shall cease to be eligible in
          accordance with the provisions of Section 8.9 and shall fail
          to resign after written request therefor by the Company or by
          any such Noteholder; or

                    (3)  the Trustee shall become incapable of acting,
          or shall be adjudged a bankrupt or insolvent, or a receiver
          of the Trustee or of its property shall be appointed, or any
          public officer shall take charge or control of the Trustee or
          of its property or affairs for the purpose of rehabilitation,
          conservation or liquidation, 

     then, in any such case, the Company may remove the Trustee and
     appoint a successor trustee by written instrument, in duplicate,
     executed by order of the Board of Directors, one copy of which
     instrument shall be delivered to the Trustee so removed and one
     copy to the successor trustee or, subject to the provisions of
     Section 7.9, any Noteholder who has been a bona fide holder of a
     Note or Notes for at least six months may, on behalf of himself
     and all others similarly situated, petition any court of competent
     jurisdiction for the removal of the Trustee and the appointment of
     a successor trustee.  Such court may thereupon, after such notice,
     if any, as it may deem proper and prescribe, remove the Trustee
     and appoint a successor trustee.

               (c)  The holders of a majority in aggregate principal
     amount of the Notes at the time outstanding may at any time remove
     the Trustee and nominate a successor trustee which shall be deemed
     appointed as successor trustee unless within ten days after notice
     to the Company of such nomination the Company objects thereto, in
     which case the Trustee so removed or any Noteholder, upon the
     terms and conditions and otherwise as in Section 8.10(a) provided,
     may petition any court of competent jurisdiction for an
     appointment of a successor trustee.

               (d)  Any resignation or removal of the Trustee and
     appointment of a successor trustee pursuant to any of the
     provisions of this Section 8.10 shall become effective upon
     acceptance of appointment by the successor trustee as provided in
     Section 8.11.

               Section 8.11  Acceptance by Successor Trustee.  Any
     successor trustee appointed as provided in Section 8.10 shall
     execute, acknowledge and deliver to the Company and to its
     predecessor trustee an instrument accepting such appointment
     hereunder, and thereupon, the resignation or removal of the
     predecessor trustee shall become effective and such successor
     trustee, without any further act, deed or conveyance, shall become
     vested with all the rights, powers, duties and obligations of its
     predecessor hereunder, with like effect as if originally named as
     trustee herein; but, nevertheless, on the written request of the
     Company or of the successor trustee, the Trustee ceasing to act
     shall, upon payment of any amounts then due it pursuant to the
     provisions of Section 8.6, execute and deliver an instrument
     transferring to such successor trustee all the rights and powers
     of the Trustee so ceasing to act.  Upon request of any such
     successor trustee, the Company shall execute any and all
     instruments in writing for more fully and certainly vesting in and
     confirming to such successor trustee all such rights and powers. 
     Any Trustee ceasing to act shall, nevertheless, retain a lien upon
     all property and funds held or collected by such trustee as such,
     except for funds held in trust for the benefit of holders of
     particular Notes, to secure any amounts then due it pursuant to
     the provisions of Section 8.6.

               No successor trustee shall accept appointment as
     provided in this Section 8.11 unless at the time of such
     acceptance such successor trustee shall be qualified under the
     provisions of Section 8.8 and eligible under the provisions of
     Section 8.9.

               Upon acceptance of appointment by a successor trustee as
     provided in this Section 8.11, the Company shall mail or cause to
     be mailed notice of the succession of such Trustee hereunder to
     the holders of Notes at their addresses as they shall appear on
     the registry books of the Company.  If the Company fails to mail
     such notice within ten days after acceptance of appointment by the
     successor trustee, the successor trustee shall cause such notice
     to be mailed at the expense of the Company.

               Section 8.12  Successor, by Merger, Etc.  Any
     corporation into which the Trustee may be merged or converted or
     with which it may be consolidated, or any corporation resulting
     from any merger, conversion or consolidation to which the Trustee
     shall be a party, or any corporation succeeding to all or
     substantially all of the corporate trust business of the Trustee,
     shall be the successor to the Trustee hereunder, provided such
     corporation shall be qualified under the provisions of Section 8.8
     and eligible under the provisions of Section 8.9 without the
     execution or filing of any paper or any further act on the part of
     any of the parties hereto.

               Section 8.13  Limitation on Rights of Trustee as
     Creditor.  If and when the Trustee shall be or become a creditor
     of the Company (or any other obligor upon the Notes) and the Trust
     Indenture Act is applicable hereto, the Trustee shall be subject
     to the provisions of the Trust Indenture Act regarding the
     collection of the claims against the Company (or any such other
     obligor).

                                ARTICLE IX

                         CONCERNING THE NOTEHOLDERS

               Section 9.1  Action by Noteholders.  Whenever in this
     Indenture it is provided that the holders of a specified
     percentage in aggregate principal amount of the Notes may take any
     action (including the making of any demand or request, the giving
     of any notice, consent or waiver or the taking of any other
     action), the fact that at the time of taking any such action, the
     holders of such specified percentage have joined therein may be
     evidenced (a) by any instrument or any number of instruments of
     similar tenor executed by Noteholders in person or by agent or
     proxy appointed in writing (b) by the record of the holders of
     Notes voting in favor thereof at any meeting of Noteholders duly
     called and held in accordance with the provisions of Article X or
     (c) by a combination of such instrument or instruments and any
     such record of such a meeting of Noteholders.  Whenever the
     Company or the Trustee solicits the taking of any action by the
     holders of the Notes, the Company or the Trustee may fix in
     advance of such solicitation, a date as the record date for
     determining holders entitled to take such action.  The record date
     shall be not more than 15 days prior to the date of commencement
     of solicitation of such action.

               Section 9.2  Proof of Execution by Noteholders.  Subject
     to the provisions of Sections 8.1, 8.2 and 11.5, proof of the
     execution of any instrument by a Noteholder or his agent or proxy
     shall be sufficient if made in accordance with such reasonable
     rules and regulations as may be prescribed by the Trustee or in
     such manner as shall be satisfactory to the Trustee.  The holding
     of Notes shall be proved by the Note register or by a certificate
     of the Note registrar. 

               The record of any Noteholders' meeting shall be proved
     in the manner provided in Section 9.1.

               Section 9.3  Who Are Deemed Absolute Owners.  The
     Company, the Trustee, any paying agent, any conversion or exchange
     agent and any Note registrar may deem the person in whose name
     such Note shall be registered upon the books of the Company to be,
     and may treat him as, the absolute owner of such Note (whether or
     not such Note shall be overdue and notwithstanding any notation of
     ownership or other writing thereon) for the purpose of receiving
     payment of or on account of the principal of, premium, if any, and
     interest on such Note, for conversion or exchange of such Note and
     for all other purposes; and neither the Company nor the Trustee
     nor any paying agent nor any conversion or exchange agent nor any
     Note registrar shall be affected by any notice to the contrary. 
     All such payments so made to any holder for the time being, or
     upon his order, shall be valid and, to the extent of the sum or
     sums so paid, effectual to satisfy and discharge the liability for
     monies payable upon any such Note.

               The Depositary shall be deemed to be the owner of any
     Note in global form for all purposes, including receipt of notices
     to Noteholders and payment of principal of, premium, if any, and
     interest on the Notes.  None of the Company, the Trustee (in its
     capacity as Trustee), any paying agent or the Note registrar (or
     co-registrar) will have any responsibility for any aspect of the
     records relating to or payments made on account of beneficial
     interests of a Note in global form or for maintaining, supervising
     or reviewing any records relating to such beneficial ownership
     interests; provided, however, that the foregoing shall not apply
     to the Trustee or any other person acting in its capacity as
     Custodian.

               Section 9.4  Company-Owned Notes Disregarded.  In
     determining whether the holders of the requisite aggregate
     principal amount of Notes have concurred in any direction,
     consent, waiver or other action under this Indenture, Notes which
     are owned by the Company or any other obligor on the Notes or by
     any person directly or indirectly controlling or controlled by or
     under direct or indirect common control with the Company or any
     other obligor on the Notes shall be disregarded and deemed not to
     be outstanding for the purpose of any such determination; provided
     that for the purposes of determining whether the Trustee shall be
     protected in relying on any such direction, consent, waiver or
     other action, only Notes which a Responsible Officer knows are so
     owned shall be so disregarded.  Notes so owned which have been
     pledged in good faith may be regarded as outstanding for the
     purposes of this Section 9.4 if the pledgee shall establish to the
     satisfaction of the Trustee the pledger's right to vote such Notes
     and that the pledgee is not the Company, any other obligor on the
     Notes or a person directly or indirectly controlling or controlled
     by or under direct or indirect common control with the Company or
     any such other obligor.  In the case of a dispute as to such
     right, any decision by the Trustee taken upon the advice of
     counsel shall be full protection to the Trustee.  Upon request of
     the Trustee, the Company shall furnish to the Trustee promptly an
     Officers' Certificate listing and identifying all Notes, if any,
     known by the Company to be owned or held by or for the account of
     any of the above described persons; and subject to Section 8.1,
     the Trustee shall be entitled to accept such Officers' Certificate
     as conclusive evidence of the facts therein set forth and of the
     fact that all Notes not listed therein are outstanding for the
     purpose of any such determination.

               Section 9.5  Revocation of Consents, Future Holders
     Bound.  At any time prior to (but not after) the evidencing to the
     Trustee, as provided in Section 9.1, of the taking of any action
     by the holders of the percentage in aggregate principal amount of
     the Notes specified in this Indenture in connection with such
     action, any holder of a Note which is shown by the evidence to be
     included in the Notes the holders of which have consented to such
     action may, by filing written notice with the Trustee at its
     Corporate Trust Office and upon proof of holding as provided in
     Section 9.2, revoke such action so far as concerns such Note. 
     Except as aforesaid, any such action taken by the holder of any
     Note shall be conclusive and binding upon such holder and upon all
     future holders and owners of such Note and of any Notes issued in
     exchange or substitution therefor, irrespective of whether any
     notation in regard thereto is made upon such Note or any Note
     issued in exchange or substitution therefor.

                               ARTICLE X

                           NOTEHOLDERS MEETINGS

               Section 10.1  Purposes for Which Meetings May be Called. 
     A meeting of Noteholders may be called at any time and from time
     to time pursuant to the provisions of this Article X for any of
     the following purposes:

               (i)  to give any notice to the Company or to the
     Trustee, or to give any directions to the Trustee, or to consent
     to the waiving of any default hereunder and its consequences, or
     to take any other action authorized to be taken by Noteholders
     pursuant to any of the provisions of Article VII;

               (ii)  to remove the Trustee and appoint a successor
     trustee pursuant to the provisions of Article VIII;

               (iii)  consent to the execution of an indenture or
     indentures supplemental hereto pursuant to the provisions of
     Section 11.2; or

               (iv)  to take any other action authorized to be taken by
     or on behalf of the holders of any specified aggregate principal
     amount of the Notes under any other provisions of this Indenture
     or under applicable law.

               Section 10.2  Manner of Calling Meetings; Record Date. 
     The Trustee may at any time call a meeting of Noteholders to take
     any action specified in Section 10.1, to be held at such time and
     at such place in the City of Boston, Commonwealth of
     Massachusetts, as the Trustee shall determine.  Notice of every
     meeting of the Noteholders, setting forth the time and the place
     of such meeting and in general terms the action proposed to be
     taken at such meeting, shall be mailed not less than 30 nor more
     than 60 days prior to the date fixed for the meeting to such
     Noteholders at their addresses as such addresses appear in the
     Note Register.  For the purpose of determining Noteholders
     entitled to notice of any meeting of Noteholders, the Trustee
     shall fix in advance a date as the record date for such
     determination, such date to be a business day not more than ten
     days prior to the date of the mailing of such notice as
     hereinabove provided.  Only persons in whose name any Note shall
     be registered in the Note Register at the close of business on a
     record date fixed by the Trustee as aforesaid, or by the Company
     or the Noteholders as in Section 10.3 provided, shall be entitled
     to notice of the meeting of Noteholders with respect to which such
     record date was so fixed.

               Section 10.3  Call of Meeting by Company or Noteholders. 
     In case at any time the Company, pursuant to a resolution of its
     Board of Directors or the holders of at least ten percent in
     aggregate principal amount of the Notes then outstanding, shall
     have requested the Trustee to call a meeting of Noteholders to
     take any action authorized in Section 10.1 by written request
     setting forth in reasonable detail the action proposed to be taken
     at the meeting, and the Trustee shall not have mailed notice of
     such meeting within 20 days after receipt of such request, then
     the Company or the holders of Notes in the amount above specified,
     as the case may be, may fix the record date with respect to, and
     determine the time and the place in said City of Boston for, such
     meeting and may call such meeting to take any action authorized in
     Section 10.1, by mailing notice thereof as provided in Section
     10.2. The record date fixed as provided in the preceding sentence
     shall be set forth in a written notice to the Trustee and shall be
     a business day not less than 15 nor more than 20 days after the
     date on which such notice is sent to the Trustee.

               Section 10.4  Who may Attend and Vote at Meetings.  Only
     persons entitled to receive notice of a meeting of Noteholders and
     their respective proxies duly appointed by an instrument in
     writing shall be entitled to vote at such meeting.  The only
     persons who shall be entitled to be present or to speak at any
     meeting of Noteholders shall be the persons entitled to vote at
     such meeting and their counsel and any representatives of the
     Trustee and its counsel and any representatives of the Company and
     its counsel.  When a determination of Noteholders entitled to vote
     at any meeting of Noteholders has been made as provided in this
     Section, such determination shall apply to any adjournments
     thereof.

               Section 10.5  Manner of Voting at Meetings and Record to
     be Kept.  The vote upon any resolution submitted to any meeting of
     Noteholders shall be by written ballots on each of which shall be
     subscribed the signature of the Noteholder or proxy casting such
     ballot and the identifying number or numbers of the Notes held or
     represented in respect of which such ballot is cast.  The
     permanent chairman of the meeting shall appoint two inspectors of
     votes who shall count all votes cast at the meeting for or against
     any resolution and who shall make and file with the secretary of
     the meeting their verified written reports in duplicate of all
     votes cast at the meeting.  A record in duplicate of the
     proceedings of each meeting of Noteholders shall be prepared by
     the secretary of the meeting and there shall be attached to said
     record the original reports of the inspectors of votes on any vote
     by ballot taken thereat and affidavits by one or more persons
     having knowledge of the facts setting forth a copy of the notice
     of the meeting and showing that said notice was mailed as provided
     in Section 10.2. The record shall show the identifying numbers of
     the Notes voting in favor of or against any resolution.  Each
     counterpart of such record shall be signed and verified by the
     affidavits of the permanent chairman and secretary of the meeting
     and one of the counterparts shall be delivered to the Company and
     the other to the Trustee to be preserved by the Trustee.

               Any counterpart record so signed and verified shall be
     conclusive evidence of the matters therein stated and shall be the
     record referred to in clause (b) of Section 9.1.

               Section 10.6  Exercise of Rights of Trustee and
     Noteholders not to be Hindered or delayed.  Nothing in this
     Article X contained shall be deemed or construed to authorize or
     permit, by reason of any call of a meeting of Noteholders or any
     rights expressly or impliedly conferred hereunder to make such
     call, any hindrance or delay in the exercise of any right or
     rights conferred upon or reserved to the Trustee or to the
     Noteholders under any of the provisions of this Indenture or of
     the Notes.

                              ARTICLE XI

                          SUPPLEMENTAL INDENTURES

               Section 11.1  Supplemental Indentures Without Consent of
     Noteholders.  The Company, when authorized by a Board Resolution,
     and the Trustee may from time to time and at any time enter into
     an indenture or indentures supplemental hereto for one or more of
     the following purposes:

               (a)  to make provision with respect to the conversion
     rights of the holders of Notes pursuant to the requirements of
     Section 15.6;

               (b)  subject to Article IV, to convey, transfer, assign,
     mortgage or pledge to the Trustee as security for the Notes, any
     property or assets;

               (c)  to evidence the succession of another person to the
     Company, or successive successions, and the assumption by the
     Successor Company of the covenants, agreements and obligations of
     the Company pursuant to Article XII;

               (d)  to add to the covenants of the Company such further
     covenants, restrictions or conditions as the Board of Directors
     and the Trustee shall consider to be for the benefit of the
     holders of Notes and to make the occurrence, or the occurrence and
     continuance, of a default in any such additional covenants,
     restrictions or conditions a default or an Event of Default
     permitting the enforcement of all or any of the several remedies
     provided in this Indenture as herein set forth; provided, however,
     that in respect of any such additional covenant, restriction or
     condition, such supplemental indenture may provide for a
     particular period of grace after default (which period may be
     shorter or longer than that allowed in the case of other defaults)
     or may provide for an immediate enforcement upon such default or
     may limit the remedies available to the Trustee upon such default;

               (e)  to provide for the issuance under this Indenture of
     Notes in coupon form (including Notes registrable as to principal
     only) and to provide for exchangeability of such Notes with the
     Notes issued hereunder in fully registered form and to make all
     appropriate changes for such purpose;

               (f)  to cure any ambiguity or to correct or supplement
     any provision contained herein or in any supplemental indenture
     which may be defective or inconsistent with any other provision
     contained herein or in any supplemental indenture, or to make such
     other provisions in regard to matters or questions arising under
     this Indenture which shall not materially adversely affect the
     interests of the holders of the Notes;

               (g)  to evidence and provide for the acceptance of
     appointment hereunder by a successor Trustee with respect to the
     Notes;

               (h)  to modify, eliminate or add to the provisions of
     this Indenture to such extent as shall be necessary to effect the
     qualifications of this Indenture under the Trust Indenture Act (if
     applicable), or under any similar federal statute hereafter
     enacted (if applicable); or

               (i)  to modify, eliminate or add to the provisions of
     this Indenture to allow for the issuance of one or more Notes in
     global form, in addition to the global Note provided for herein,
     representing beneficial interests in Notes issued outside the
     United States in reliance on Regulation S under the Securities
     Act, with such transfer restrictions and legends as are consistent
     with such Regulation, and to add provisions relating to the
     exchange and transfer of beneficial interests in any Note or Notes
     represented by any such global Note or Notes, any definitive Note
     and any global Note referred to in Section 2.5(b) hereof.

               The Trustee is hereby authorized to join with the
     Company in the execution of any such supplemental indenture, to
     make any further appropriate agreements and stipulations which may
     be therein contained and to accept the conveyance, transfer and
     assignment of any property thereunder, but the Trustee shall not
     be obligated to, but may in its discretion, enter into any
     supplemental indenture which affects the Trustee's own rights,
     duties or immunities under this Indenture or otherwise.

               Any supplemental indenture authorized by the provisions
     of this Section 11.1 may be executed by the Company and the
     Trustee without the consent of the holders of any of the Notes at
     the time outstanding, notwithstanding any of the provisions of
     Section 11.2.

               Section 11.2  Supplemental Indentures with Consent of
     Noteholders.  With the consent (evidenced as provided in Article
     IX) of the holders of not less than a majority in aggregate
     principal amount of the Notes at the time outstanding, the
     Company, when authorized by a Board Resolution and the Trustee may
     from time to time and at any time enter into an indenture or
     indentures supplemental hereto for the purpose of adding any
     provisions to or changing in any manner or eliminating any of the
     provisions of this Indenture or any supplemental indenture or of
     modifying in any manner the rights of the holders of the Notes;
     provided, however, that no such supplemental indenture shall (i)
     extend the fixed maturity of any Note, or reduce the rate or
     extend the time of payment of interest thereon, or reduce the
     principal amount thereof or premium, if any, thereon or reduce any
     amount payable on redemption thereof, alter the obligation of the
     Company to redeem the Notes at the option of the holder upon the
     occurrence of a Change of Control or impair or affect the right of
     any Noteholder to institute suit for the payment thereof or make
     the principal thereof or interest or premium, if any, thereon
     payable in any coin or currency other than that provided in the
     Notes or impair the right to exchange the Notes for Preferred
     Stock or the right to convert the Notes into Common Stock subject
     to the terms set forth herein, including Sections 15.6 and 17.6,
     without the consent of the holder of each Note so affected or (ii)
     reduce the aforesaid percentage of Notes, the holders of which are
     required to consent to any such supplemental indenture, without
     the consent of the holders of all Notes then outstanding.

               Upon the request of the Company, accompanied by a copy
     of a Board Resolution certified by its Secretary or Assistant
     Secretary authorizing the execution of any such supplemental
     indenture, and upon the filing with the Trustee of evidence of the
     consent of Noteholders as aforesaid, the Trustee shall join with
     the Company in the execution of such supplemental indenture unless
     such supplemental indenture affects the Trustee's own rights,
     duties or immunities under this Indenture or otherwise, in which
     case the Trustee may in its discretion, but shall not be obligated
     to, enter into such supplemental indenture.

               It shall not be necessary for the consent of the
     Noteholders under this Section 11.2 to approve the particular form
     of any proposed supplemental indenture, but it shall be sufficient
     if such consent shall approve the substance thereof.

               Section 11.3  Effect of Supplemental Indentures.  Any
     supplemental indenture executed pursuant to the provisions of this
     Article XI shall comply with the Trust Indenture Act, as then in
     effect, if such supplemental indenture is then required to so
     comply.  Upon the execution of any supplemental indenture pursuant
     to the provisions of this Article XI, this Indenture shall be and
     be deemed to be modified and amended in accordance therewith and
     the respective rights, limitation of rights, obligations, duties
     and immunities under this Indenture of the Trustee, the Company
     and the holders of Notes shall thereafter be determined, exercised
     and enforced hereunder subject in all respects to such
     modifications and amendments and all the terms and conditions of
     any such supplemental indenture shall be and be deemed to be part
     of the terms and conditions of this Indenture for any and all
     purposes.

               Section 11.4  Notation on Notes.  Notes authenticated
     and delivered after the execution of any supplemental indenture
     pursuant to the provisions of this Article XI may bear a notation
     in form approved by the Trustee as to any matter provided for in
     such supplemental indenture.  If the Company or the Trustee shall
     so determine, new Notes so modified as to conform, in the opinion
     Of the Trustee and the Board of Directors, to any modification of
     this Indenture contained in any such supplemental indenture may,
     at the Company's expense, be prepared and executed by the Company,
     authenticated by the Trustee (or an authenticating agent duly
     appointed by the Trustee pursuant to Section 16.12) and delivered
     in exchange for the Notes then outstanding, upon surrender of such
     Notes then outstanding.

               Section 11.5  Evidence of Compliance of Supplemental
     Indenture to be Furnished Trustee.  The Trustee shall be furnished
     with and, subject to the provisions of Sections 8.1 and 8.2, may
     rely upon an Officers' Certificate and an Opinion of Counsel as
     conclusive evidence that any supplemental indenture executed
     pursuant hereto complies with the requirements of this Article XI.

                              ARTICLE XII

                   CONSOLIDATION, MERGER, SALE, CONVEYANCE,
                             TRANSFER AND LEASE

               Section 12.1  Company May Consolidate, Etc. on Certain
     Terms.  The Company shall not consolidate with or merge with or
     into, or convey, transfer or lease all or substantially all of its
     assets to any Person unless: (i) either the Company is the
     resulting, surviving or transferee person (the "Successor
     Company") or the Successor Company is a person organized and
     existing under the laws of the United States or any State thereof
     or the District of Columbia, and the Successor Company (if not the
     Company) expressly assumes by a supplemental indenture, executed
     and delivered to the Trustee, in form satisfactory to the Trustee,
     all the obligations of the Company under this Indenture and the
     Notes, including the rights pursuant to Article XV hereof; (ii)
     immediately after giving effect to such transaction, no Event of
     Default has happened and is continuing; and (iii) the Company
     delivers to the Trustee an Officer's Certificate and an Opinion of
     Counsel, each stating that such consolidation, merger or transfer
     and such supplemental indenture (if any) comply with this
     Indenture.

               Section 12.2  Successor Company to Be Substituted.  In
     case of any such consolidation, merger, sale, conveyance, transfer
     or lease and upon the assumption by the Successor Company, by
     supplemental indenture, executed and delivered to the Trustee and
     satisfactory in form to the Trustee, of the due and punctual
     payment of the principal of, premium, if any, and interest on all
     of the Notes and the due and punctual performance of all of the
     covenants and conditions of this Indenture to be performed by the-
     Company, such Successor Company shall succeed to and be
     substituted for the Company, with the same effect as if it had
     been named herein as the party of the first part.  Such Successor
     Company thereupon may cause to be signed, and may issue either in
     its own name or in the name of SoftKey International Inc. any or
     all of the Notes issuable hereunder which theretofore shall not
     have been signed by the Company and delivered to the Trustee; and,
     upon the order of such Successor Company instead of the Company
     and subject to all the terms, conditions and limitations in this
     Indenture prescribed, the Trustee shall authenticate and shall
     deliver, or cause to be authenticated and delivered, any Notes
     which previously shall have been signed and delivered by the
     officers of the Company to the Trustee for authentication, and any
     Notes which such Successor Company thereafter shall cause to be
     signed and delivered to the Trustee for that purpose.  All the
     Notes so issued shall in all respects have the same legal rank and
     benefit under this Indenture as the Notes theretofore or
     thereafter issued in accordance with the terms of this Indenture
     as though all of such Notes had been issued at the date of the
     execution hereof. In the event of any such consolidation, merger,
     sale, conveyance, transfer or lease, the person named as the
     "Company" in the first paragraph of this Indenture or any
     successor which shall thereafter have become such in the manner
     prescribed in this Article XII may be dissolved, wound up and
     liquidated at any time thereafter and such person shall be
     released from its liabilities as obligor and maker of the Notes
     and from its obligations under this Indenture.

               In case of any such consolidation, merger, sale,
     conveyance, transfer or lease, such changes in phraseology and
     form (but not in substance) may be made in the Notes thereafter to
     be issued as may be appropriate.

               Section 12.3  Opinion of Counsel to Be Given Trustee. 
     The Trustee subject to Sections 8.1 and 8.2, shall receive an
     Officers' Certificate and an Opinion of Counsel as conclusive
     evidence that any such consolidation, merger, sale, conveyance,
     transfer or lease and any such assumption complies with the
     provisions of this Article XII.

                             ARTICLE XIII

                   SATISFACTION AND DISCHARGE OF INDENTURE;
                             UNCLAIMED MONEYS

               Section 13.1  Legal Defeasance and Covenant Defeasance
     of the Notes.

               (a)  The Company may, at its option by Board Resolution,
     at any time, with respect to the Notes, elect to have either
     paragraph (b) or paragraph (c) below be applied to the outstanding
     Notes upon compliance with the conditions set forth in paragraph
     (d).

               (b)  Upon the Company's exercise under paragraph (a) of
     the option applicable to this paragraph (b), the Company shall be
     deemed to have been released and discharged from its obligations
     with respect to the outstanding Notes on the date the conditions
     set forth below are satisfied (hereinafter, "legal defeasance"). 
     For this purpose, such legal defeasance means that the Company
     shall be deemed to have paid and discharged the entire
     indebtedness represented by the outstanding Notes, which shall
     thereafter be deemed to be "outstanding" only for the purposes of
     the Sections of and matters under this Indenture referred to in
     (i) and (ii) below and to have satisfied all its other obligations
     under such Notes and this Indenture insofar as such Notes are
     concerned, except for the following which shall survive until
     otherwise terminated or discharged hereunder: (i) the rights of
     holders of outstanding Notes to receive solely from the trust fund
     described in paragraph (d) below and as more fully set forth in
     such paragraph, payments in respect of the principal of, premium,
     if any, and interest on such Notes when such payments are due,
     (ii) obligations listed in Section 13.3 and (iii) the obligations
     of the Company pursuant to Section 5.6.

               (c)  Upon the Company's exercise under paragraph (a) of
     the option applicable to this paragraph (c), the Company shall be
     released and discharged from its obligations under any covenant
     contained in Article XII and in Sections 3.5, 5.3, 5.4, 5.5 and
     5.7 with respect to the outstanding Notes on and after the date
     the conditions set forth in paragraph (d) are satisfied
     (hereinafter, "covenant defeasance"), and the Notes shall
     thereafter be deemed to be not "outstanding" for the purpose of
     any direction, waiver, consent or declaration or act of Holders
     (and the consequences of any thereof) in connection with such
     covenants, but shall continue to be deemed "outstanding" for all
     other purposes hereunder.  For this purpose, such covenant
     defeasance means that, with respect to the outstanding Notes, the
     Company may omit to comply with and shall have no liability in
     respect of any term, condition or limitation set forth in any such
     covenant, whether directly or indirectly, by reason of any
     reference elsewhere herein to any such covenant or by reason of
     any reference in any such covenant to any other provision herein
     or in any other document, and such omission to comply shall not
     constitute a Default or an Event of default under Section 7.1(c),
     but, except as specified above, the remainder of this Indenture
     and such Notes shall be unaffected thereby.

               (d)  The following shall be the conditions to
     application of either paragraph (b) or paragraph (c) above to the
     outstanding Notes:

                    (i)  The Company shall have irrevocably deposited
          in trust with the Trustee, pursuant to an irrevocable trust
          and security agreement in form and substance satisfactory to
          the Trustee, cash or U.S. Government Obligations maturing as
          to principal and interest at such times, or a combination
          thereof, in such amounts as are sufficient, without
          consideration of the reinvestment of such interest and after
          payment of all federal, state and local taxes or other
          charges or assessments in respect thereof payable by the
          Trustee, in the opinion of a nationally recognized firm of
          independent public accountants expressed in a written
          certification thereof (in form and substance reasonably
          satisfactory to the Trustee) delivered to the Trustee, to pay
          the principal of, premium, if any, and interest on the
          outstanding Notes on the dates on which any such payments are
          due and payable in accordance with the terms of this
          Indenture and of the Notes;

               (ii)  (A) No Event of Default shall have occurred or be
          continuing on the date of such deposit, and (B) no Default or
          Event of Default under Section 7.1(d) or 7.1(e) shall occur
          on or before the 123rd day after the date of such deposit;

               (iii)  Such deposit will not result in a Default under
          this Indenture or a breach or violation of, or constitute a
          default under, any other instrument or agreement to which the
          Company is a party or by which it or its property is bound;

               (iv) In the case of a legal defeasance under paragraph
          (b) above, the Company has delivered to the Trustee an
          Opinion of Counsel stating that (A) the Company has received
          from, or there has been published by, the Internal Revenue
          Service a ruling or (B) since the date of this Indenture,
          there has been a change in the applicable federal income tax
          law, in either case to the effect that, and based thereon
          such opinion shall confirm that, the holders of the Notes
          will not recognize income, gain or loss for federal income
          tax purposes as a result of such deposit, defeasance and
          discharge and will be subject to federal income tax on the
          same amounts and in the same manner and at the same times as
          would have been the case if such deposit, defeasance and
          discharge had not occurred; and, in the case of a covenant
          defeasance under paragraph (c) above, the Company shall
          deliver to the Trustee an Officers' Certificate and an
          Opinion of Counsel, in form and substance reasonably
          satisfactory to the Trustee, to the effect that holders of
          the Notes will not recognize income, gain or loss for federal
          income tax purposes as a result of such deposit and
          defeasance and will be subject to federal income tax on the
          same amounts, in the same manner and at the same times as
          would have been the case if such deposit and defeasance had
          not occurred;

               (v)  The holders shall have a perfected security
          interest under applicable law in the cash or U.S. Government
          Obligations deposited pursuant to Section 13(d)(i) above;

               (vi) The Company shall have delivered to the Trustee an
          Opinion of Counsel, in form and substance reasonably
          satisfactory to the Trustee, to the effect that, after the
          passage of 123 days following the deposit, the trust funds
          will not be subject to any applicable bankruptcy, insolvency,
          reorganization or similar law affecting creditors' rights
          generally;

               (vii) Such defeasance shall not cause the Trustee to
          have a conflicting interest with respect to any securities of
          the Company; and

               (viii)  The Company has delivered to the Trustee an
          Officers' Certificate and an Opinion of Counsel, each stating
          that all conditions precedent specified herein relating to
          the defeasance contemplated by this Section 13.1 have been
          complied with; 

     provided, however, that no deposit under clause (d)(i) above shall
     be effective to terminate the obligations of the Company under the
     Notes or this Indenture prior to 123 days following any such
     deposit.

               Section 13.2  Termination of Obligations upon
     Cancellation of the Notes.  In addition to the Company's rights
     under Section 13.1, the Company may terminate all of its
     obligations under this Indenture (subject to Section 13.3 and any
     obligations of the Company under Section 5.6 with respect to any
     Common Stock issued upon conversion of the Notes or any Preferred
     Stock issued upon exchange of the Notes) when:

               (a)  (i)  all Notes theretofore authenticated and
          delivered (other than Notes which have been destroyed, lost
          or stolen and which have been replaced or paid as provided in
          Section 2.6) have been delivered to the Trustee for
          cancellation;

               (ii) the Company has paid or caused to be paid all other
          sums payable hereunder and under the Notes by the Company;
          and

               (iii)  the Company has delivered to the Trustee an
          Officers' Certificate, stating that all conditions precedent
          specified herein relating to the satisfaction and discharge
          of this Indenture have been complied with; or

               (b)  (i) the Notes not previously delivered to the
          Trustee for cancellation will have become due and payable or
          are by their terms to become due and payable within one year
          or are to be called for redemption under arrangements
          satisfactory to the Trustee upon delivery of notice; (ii) the
          Company will have irrevocably deposited with the Trustee, as
          trust funds, cash, in an amount sufficient to pay principal
          of and interest on the outstanding Notes, to maturity or
          redemption, as the case may be; (iii) such deposit will not
          result in a breach or violation of, or constitute a default
          under, any agreement or instrument pursuant to which the
          Company is a party or by which it or its property is bound;
          and (iv) and the Company has delivered to the Trustee an
          Officers' Certificate and an Opinion of Counsel, each stating
          that all conditions related to such defeasance have been
          complied with.

               Section 13.3  Survival of Certain Obligations. 
     Notwithstanding the satisfaction and discharge of this Indenture
     and of the Notes referred to in Section 13.1 or 13.2, the
     respective obligations of the Company and the Trustee under
     Sections 2.3, 2.4, 2.5, 2.6, 2.8, 2.9, 5.2, 6.1, 7.4, 7.9, 8.6,
     8.10, 13.5, 13.6 and 13.7 shall survive until the Notes are no
     longer outstanding, and thereafter, the obligations of the Company
     and the Trustee under Sections 7.9, 8.6, 13.5, 13.6 and 13.7 shall
     survive.  Nothing contained in this Article XIII shall abrogate
     any of the rights, obligations or duties of the Trustee under this
     Indenture.

               Section 13.4  Acknowledgment of Discharge by Trustee. 
     Subject to Section 13.7, after (i) the conditions of Section 13.1
     or 13.2 have been satisfied, (ii) the Company has paid or caused
     to be paid all other sums payable hereunder by the Company and
     (iii) the Company has delivered to the Trustee an Officers'
     Certificate and an Opinion of Counsel, each stating that all
     conditions precedent referred to in clause (i) above relating to
     the satisfaction and discharge of this Indenture have been
     complied with, the Trustee upon written request shall acknowledge
     in writing the discharge of the Company's obligations under this
     Indenture except for those surviving obligations specified in
     Section 13.3.

               Section 13.5  Application of Trust Assets.  The Trustee
     shall hold any cash or U.S. Government Obligations deposited with
     it in the irrevocable trust established pursuant to Section 13.1
     or 13.2, as the case may be.  The Trustee shall apply the
     deposited cash or the U.S. Government Obligations, together with
     earnings thereon in accordance with this Indenture and the terms
     of the irrevocable trust agreement established pursuant to Section
     13.1 or 13.2, as the case may be, to the payment of principal of,
     premium, if any, and interest on the Notes.  The cash or U.S.
     Government Obligations so held in trust and deposited with the
     Trustee in compliance with Section 13.1 or 13.2, as the case may
     be, shall not be part of the trust estate under this Indenture,
     but shall constitute a separate trust fund for the benefit of all
     holders entitled thereto.  Except as specifically provided herein,
     the Trustee shall not be requested to invest any amounts held by
     it for the benefit of the holders or pay interest on uninvested
     amounts to any holder.

               Section 13.6  Repayment to the Company; Unclaimed Money. 
     Upon termination of the trust established pursuant to Section 13.1
     or 13.2, as the case may be, the Trustee shall promptly pay to the
     Company upon request any excess cash or U.S. Government
     Obligations held by them.  Additionally, if amounts for the
     payment of principal, premium, if any, or interest remains
     unclaimed for six years, the Trustee will pay such amounts back to
     the Company forthwith.  Thereafter, all liability of the Trustee
     with respect to such amounts shall cease.

               Subject to applicable laws governing escheat of such
     property, the Trustee shall pay to the Company upon request, and,
     if applicable, in accordance with the irrevocable trust
     established pursuant to Section 13.1 or 13.2, any cash or U.S.
     Government Obligations held by them for the payment of principal
     of, premium, if any, or interest on the Notes that remain
     unclaimed for six years after the date on which such payment shall
     have become due.  After payment to the Company, Holders entitled
     to such payment must look to the Company for such payment as
     general creditors unless an applicable abandoned property law
     designates another person.

               Section 13.7  Reinstatement.  If the Trustee is unable
     to apply any cash or U.S. Government Obligations in accordance
     with Section 13.1 or 13.2 by reason of any legal proceeding or by
     reason of any order or judgment of any court or governmental
     authority enjoining, restraining or otherwise prohibiting such
     application, the Company's obligations under this Indenture and
     the Notes shall be revived and reinstated as though no deposit had
     occurred pursuant to Section 13.1 or 13.2 until such time as the
     Trustee is permitted to apply all such cash or U.S. Government
     Obligations in accordance with Section 13.1 or 13.2, as the case
     may be; provided that if the Company makes any payment of
     principal of, premium, if any, or interest on any Notes following
     the reinstatement of its obligations, the Company shall be
     subrogated to the rights of the Holders of such Notes to receive
     such payment from the amounts held by the Trustee.

                            ARTICLE XIV
                  IMMUNITY OF INCORPORATORS, STOCKHOLDERS,
                          OFFICERS AND DIRECTORS

               Section 14.1  Indenture and Notes Solely Corporate
     Obligations.  No recourse for the payment of the principal of, or
     premium, if any, or interest on any Note, or for any claim based
     thereon or otherwise in respect thereof, and no recourse under or
     upon any obligation, covenant or agreement of the Company in this
     Indenture or in any supplemental indenture or in any Note, or
     because of the creation of any indebtedness represented thereby,
     shall be had against any incorporator, stockholder, officer or
     director, as such, past, present or future, of the Company or of
     any successor entity, either directly or through the Company or
     any successor entity, whether by virtue of any constitution,
     statute or rule of law, or by the enforcement of any assessment or
     penalty or otherwise; it being expressly understood that all such
     liability is hereby expressly waived and released as a condition
     of, and as a consideration for, the execution of this Indenture
     and the issue of the Notes.

                               ARTICLE XV

                           CONVERSION OF NOTES

               Section 15.1  Right to Convert.  Subject to and upon
     compliance with the provisions of this Indenture, the holder of
     any Note shall have the right, at his option, at any time prior to
     the close of business on November 1, 2000 (except that, with
     respect to any Note or portion of a Note which shall be called for
     redemption or delivered for repurchase, such right shall
     terminate, except as provided in the fourth paragraph of Section
     15.2, at the close of business on the last Trading Day prior to
     the date fixed for redemption of such Note or portion of a Note
     unless the Company shall default in payment due upon redemption
     thereof) to convert the principal amount of any such Note, or any
     portion of such principal amount which is $1,000 or an integral
     multiple thereof, into that number of fully paid and nonassessable
     shares of Common Stock (as such shares shall then be constituted)
     obtained by dividing the principal amount of the Note or portion
     thereof surrendered for conversion by the Conversion Price in
     effect at such time, by surrender of the Note so to be converted
     in whole or in part in the manner provided in Section 15.2. A
     holder of Notes is not entitled to any rights of a holder of
     Common Stock until such holder has converted his Notes to Common
     Stock, and only to the extent such Notes are deemed to have been
     converted to Common Stock under this Article XV.

               Section 15.2  Exercise of Conversion Privilege; Issuance
     of Common Stock on Conversion; No Adjustment for Interest or
     Dividends.  In order to exercise the conversion privilege with
     respect to any Note in definitive form, the holder of any such
     Note to be converted in whole or in part shall surrender such
     Note, duly endorsed, at an office or agency maintained by the
     Company pursuant to Section 5.2, accompanied by the funds, if any,
     required by the penultimate paragraph of this Section 15.2, and
     shall give written notice of conversion in the form provided on
     the Notes (or such other notice which is acceptable to the
     Company) to the office or agency that the holder elects to convert
     such Note or the portion thereof specified in said notice.  Such
     notice shall also state the name or names (with address) in which
     the certificate or certificates for shares of Common Stock which
     shall be issuable on such conversion shall be issued and shall be
     accompanied by transfer taxes, if required pursuant to Section
     15.7. Each such Note surrendered for conversion shall, unless the
     shares issuable on conversion are to be issued in the same name as
     the registration of such Note, be duly endorsed by, or be
     accompanied by instruments of transfer in form satisfactory to the
     Company duly executed by, the holder or his duly authorized
     attorney.

               In order to exercise the conversion privilege with
     respect to any interest in a Note in global form, the beneficial
     holder must complete the appropriate instruction form for
     conversion pursuant to the Depositary's book-entry conversion
     program and follow the other procedures set forth in such program.

               As promptly as practicable after satisfaction of the
     requirements for conversion set forth above, subject to compliance
     with any restrictions on transfer if shares issuable on conversion
     are to be issued in a name other than that of the Noteholder (as
     if such transfer were a transfer of the Note or Notes (or portion
     thereof) so converted), the Company shall issue and shall deliver
     to such holder at the office or agency maintained by the Company
     for such purpose pursuant to Section 5.2, a certificate or
     certificates for the number of full shares issuable upon the
     conversion of such Note or portion thereof in accordance with the
     provisions of this Article XV and a check or cash in respect of
     any fractional interest in respect of a share of Common Stock
     arising upon such conversion, as provided in Section 15 1. In case
     any Note of a denomination greater than $1,000 shall be
     surrendered for partial conversion, and subject to Section 2.3,
     the Company shall execute and the Trustee shall authenticate and
     deliver to the holder of the Note so surrendered, without charge
     to him, a new Note or Notes in authorized denominations in an
     aggregate principal amount equal to the unconverted portion of the
     surrendered Note.

               Each conversion shall be deemed to have been effected as
     to any such Note (or portion thereof) on the date on which the
     requirements set forth above in this Section 15.2 have been
     satisfied as to such Note (or portion thereof), and the person in
     whose name any certificate or certificates for shares of Common
     Stock shall be issuable upon such conversion shall be deemed to
     have become on said date the holder of record of the shares
     represented thereby; provided, however, that any such surrender on
     any date when the stock transfer books of the Company shall be
     closed shall constitute the person in whose name the certificates
     are to be issued as the record holder thereof for all purposes on
     the next succeeding day on which such stock transfer books are
     open, but such conversion shall be at the Conversion Price in
     effect on the date upon which such Note shall have been
     surrendered.

               Any Note or portion thereof surrendered for conversion
     during the period from the close of business on the record date
     for any interest payment date through the close of business on the
     Trading Day next preceding such interest payment date shall
     (unless such Note or portion thereof being converted shall have
     been called for redemption on a date in such period) be
     accompanied by payment, in funds acceptable to the Company, of an
     amount equal to the interest otherwise payable on such interest
     payment date on the principal amount being converted; provided,
     however, that no such payment need be made if there shall exist at
     the time of conversion a default in the payment of interest on the
     Notes.  An amount equal to such payment shall be paid by the
     Company on such interest payment date to the holder of such Note
     at the close of business on such record date; provided, however,
     that if the Company shall default in the payment of interest on
     such interest payment date, such amount shall be paid to the
     person who made such required payment.  Except as provided above
     in this Section 15.2, no adjustment shall be made for interest
     accrued on any Note converted or for dividends on any shares
     issued upon the conversion of such Note as provided in this
     Article.

               Upon the conversion of an interest in a Note in global
     form, the Trustee, or the Custodian at the direction of the
     Trustee, shall make a notation on such Note in global form as to
     the reduction in the principal amount represented thereby.

               Section 15.3  Cash Payments in Lieu of Fractional
     Shares.  No fractional shares of Common Stock or scrip
     representing fractional shares shall be issued upon conversion of
     Notes.  If more than one Note shall be surrendered for conversion
     at one time by the same holder, the number of full shares which
     shall be issuable upon conversion shall be computed on the basis
     of the aggregate principal amount of the Notes (or specified
     portions thereof to the extent permitted hereby) so surrendered. 
     If any fractional share of stock would be issuable upon the
     conversion of any Note or Notes, the Company shall make an
     adjustment therefor in cash at the current market value thereof. 
     The current market value of a share of Common Stock shall be the
     Closing Price on the first Trading Day immediately preceding the
     day on which the Notes (or specified portions thereof) are deemed
     to have been converted and such Closing Price shall be determined
     as provided in Section 15.5(g).

               Section 15.4  Conversion Price.  The conversion price
     shall be as specified in the forms of Notes (herein called the
     "Conversion Price") attached as Exhibits A and B hereto, subject
     to adjustment as provided in this Article XV.

               Section 15.5  Adjustment of Conversion Price.  The
     Conversion Price shall be adjusted from time to time by the
     Company as follows:

               (a)  In case the Company shall hereafter pay a dividend
     or make a distribution to all holders of the outstanding Common
     Stock in shares of Common Stock, the Conversion Price in effect at
     the opening of business on the date following the date fixed for
     the determination of stockholders entitled to receive such
     dividend or other distribution shall be reduced by multiplying
     such Conversion Price by a fraction the numerator of which shall
     be the number of shares of Common Stock outstanding at the close
     of business on the Record Date (as defined in Section 15.5(g))
     fixed for such determination and the denominator of which shall be
     the sum of such number of shares and the total number of shares
     constituting such dividend or other distribution, such reduction
     to become effective immediately after the opening of business on
     the day following the Record Date.  The Company will not pay any
     dividend or make any distribution on shares of Common Stock held
     in the treasury of the Company.

               (b)  In case the Company shall issue rights or warrants
     to all holders of its outstanding shares of Common Stock entitling
     them (for a period expiring within 45 days after the date fixed
     for determination of stockholders entitled to receive such rights
     or warrants) to subscribe for or purchase shares of Common Stock
     at a price per share less than the Current Market Price (as
     defined in Section 15.5(g)) on the Record Date fixed for
     determination of stockholders entitled to receive such rights or
     warrants, the Conversion Price shall be adjusted so that the same
     shall equal the price determined by multiplying the Conversion
     Price in effect at the opening of business on the date after the
     Record Date by a fraction the numerator of which shall be the
     number of shares of Common Stock outstanding at the close of
     business on the Record Date plus the number of shares which the
     aggregate offering price of the total number of shares so offered
     would purchase at such Current Market Price, and the denominator
     of which shall be the number of shares of Common Stock outstanding
     on the close of business on the Record Date plus the total number
     of additional shares of Common Stock so offered for subscription
     or purchase.  Such adjustment shall become effective immediately
     after the opening of business on the day following the Record Date
     fixed for determination of stockholders entitled to receive such
     rights or warrants.  To the extent that shares of Common Stock are
     not delivered after the expiration or termination of such rights
     or warrants, the Conversion Price shall be readjusted to the
     Conversion Price which would then be in effect had the adjustments
     made upon the issuance of such rights or warrants been made on the
     basis of delivery of only the number of shares of Common Stock
     actually delivered.  In the event that such rights or warrants are
     not so issued, the Conversion Price shall again be adjusted to be
     the Conversion Price which would then be in effect if such date
     fixed for the determination of stockholders entitled to receive
     such rights or warrants had not been fixed.  In determining
     whether any rights or warrants entitle the holders to subscribe
     for or purchase shares of Common Stock at less than such Current
     Market Price, and in determining the aggregate offering price of
     such shares of Common Stock, there shall be taken into account any
     consideration received for such rights or warrants, the value of
     such consideration, if other than cash, to be determined by the
     Board of Directors.

               (c)  In case outstanding shares of Common Stock shall be
     subdivided into a greater number of shares of Common Stock, the
     Conversion Price in effect at the opening of business on the day
     following the day upon which such subdivision becomes effective
     shall be proportionately reduced, and conversely, in case
     outstanding shares of Common Stock shall be combined into a
     smaller number of shares of Common Stock, the Conversion Price in
     effect at the opening of business on the day following the day
     upon which such combination becomes effective shall be
     proportionately increased, such reduction or increase, as the case
     may be, to become effective immediately after the opening of
     business on the day following the day upon which such subdivision
     or combination becomes effective.

               (d)  In case the Company shall, by dividend or
     otherwise, distribute to all holders of its Common Stock shares of
     any class of capital stock of the Company (other than any
     dividends or distributions to which Section 15.5(a) applies) or
     evidences of its indebtedness or assets (including securities, but
     excluding any rights or warrants referred to in Section 15.5(b),
     and excluding any dividend or distribution (x) in connection with
     the liquidation, dissolution or winding-up of the Company, whether
     voluntary or involuntary, (y) exclusively in cash or (z) referred
     to in Section 15.5(a) (any of the foregoing hereinafter in this
     Section 15.5(d) called the "Securities"), then, in each such case,
     the Conversion Price shall be reduced so that the same shall be
     equal to the price determined by multiplying the Conversion Price
     in effect immediately prior to the close of business on the Record
     Date (as defined in Section 15.5(g)) with respect to such
     distribution by a fraction of which the numerator shall be the
     Current Market Price (determined as provided in Section 15.5(g))
     on such date less the fair market value (as determined by the
     Board of Directors, whose determination shall be conclusive and
     described in a Board Resolution) on such date of the portion of
     the Securities so distributed applicable to one share of Common
     Stock and the denominator shall be such Current Market Price, such
     redaction to become effective immediately prior to the opening of
     business on the day following the Record Date; provided, however,
     that in the event the then fair market value (as so determined) of
     the portion of the Securities so distributed applicable to one
     share of Common Stock is equal to or greater than the Current
     Market Price on the Record Date, in lieu of the foregoing
     adjustment, adequate provision shall be made so that each
     Noteholder shall have the right to receive upon conversion the
     amount of Securities such holder would have received had such
     holder converted each Note on such date.  In the event that such
     dividend or distribution is not so paid or made, the Conversion
     Price shall again be adjusted to be the Conversion Price which
     would then be in effect if such dividend or distribution had not
     been declared.  If the Board of Directors determines the fair
     market value of any distribution for purposes of this Section
     15.5(d) by reference to the actual or when issued trading market
     for any securities comprising all or part of such distribution, it
     must in doing so consider the prices in such market over the same
     period used in computing the Current Market Price pursuant to
     Section 15.5(g) to the extent possible.

               Notwithstanding the foregoing provisions of this Section
     15.5(d), no adjustment shall be made hereunder for any
     distribution of Securities if the Company makes proper provision
     so that each Noteholder who converts such Note (or any portion
     thereof) after the date fixed for determination of stockholders
     entitled to receive such distribution shall be entitled to receive
     upon such conversion, in addition to the shares of Common Stock
     issuable upon such conversion, the amount and kind of Securities
     that such holder would have been entitled to receive if such
     holder had, immediately prior to such determination date,
     converted such Note into Common Stock; provided that, with respect
     to any Securities that are convertible, exchangeable or
     exercisable, the foregoing provision shall only apply to the
     extent (and so long as) the Securities receivable upon conversion
     of such Note would be convertible, exchangeable or exercisable, as
     applicable, without any loss of rights or privileges for a period
     of at least 60 days following conversion of such Note.

               Rights or warrants distributed by the Company to all
     holders of Common Stock entitling the holders thereof to subscribe
     for or purchase shares of the Company's capital stock (either
     initially or under certain circumstances), which rights or
     warrants, until the occurrence of a specified event or events
     ("Trigger Event"): (i) are deemed to be transferred with such
     shares of Common Stock, (ii) are not exercisable and (iii) are
     also issued in respect of future issuances of Common Stock, shall
     not be deemed distributed for purposes of this Section 15.5(d)
     (and no adjustment to the Conversion Price under Section 15.5(d)
     will be required) until the occurrence of the earliest Trigger
     Event.  In addition, in the event of any distribution of rights or
     warrants, or any Trigger Event with respect thereto, that shall
     have resulted in an adjustment to the Conversion Price under this
     Section 15.5(d), (1) in the case of any such rights or warrants
     which shall all have been redeemed or repurchased without exercise
     by any holders thereof, the Conversion Price shall be readjusted
     upon such final redemption or repurchase to give effect to such
     distribution or Trigger Event, as the case may be, as though it
     were a cash distribution, equal to the per share redemption or
     repurchase price received by a holder of Common Stock with respect
     to such rights or warrants (assuming such holder had retained such
     rights or warrants), made to all holders of Common Stock as of the
     date of such redemption or repurchase, and (2) in the case of such
     rights or warrants all of which shall have expired or been
     terminated without exercise by any holder thereof, the Conversion
     Price shall be readjusted as if such issuance had not occurred.

               For purposes of this Section 15.5(d) and Sections
     15.5(a) and (b), any dividend or distribution to which this
     Section 15.5(d) is applicable that also includes shares of Common
     Stock, or rights or warrants to subscribe for or purchase shares
     of Common Stock (or both), shall be deemed instead to be (1) a
     dividend or distribution of the evidences of indebtedness, assets
     or shares of capital stock other than such shares of Common Stock
     or rights or warrants (and any Conversion Price reduction required
     by this Section 15.5(d) with respect to such dividend or
     distribution shall then be made) immediately followed by (2) a
     dividend or distribution of such shares of Common Stock or such
     rights or warrants (and any further Conversion Price reduction
     required by Sections 15.5(a) and (b) with respect to such dividend
     or distribution shall then be made, except (A) the Record Date of
     such dividend or distribution shall be substituted as "the date
     fixed for the determination of stockholders entitled to receive
     such dividend or other distribution" and "the date fixed for such
     determination" within the meaning of Sections 15.5(a) and (b) and
     (B) any shares of Common Stock included in such dividend or
     distribution shall not be deemed "outstanding at the close of
     business on the date fixed for such determination" within the
     meaning of Section 15.5(a).

               (e)  In case the Company shall, by dividend or
     otherwise, distribute to all holders of its Common Stock cash
     (excluding any cash that is distributed upon a merger or
     consolidation to which Section 15.6 applies or as part of a
     distribution referred to in Section 15.5(d)) in an aggregate
     amount that, combined together with (1) the aggregate amount of
     any other such distributions to all holders of its Common Stock
     made exclusively in cash within the twelve (12) months preceding
     the date of payment of such distribution, and in respect of which
     no adjustment pursuant to this Section 15.5(e) has been made, and
     (2) the aggregate of any cash plus the fair market value (as
     determined by the Board of Directors, whose determination shall be
     conclusive and described in a Board Resolution) of consideration
     payable in respect of any tender offer, by the Company or any of
     its subsidiaries for all or any portion of the Common Stock
     concluded within the twelve (12) months preceding the date of
     payment of such distribution, and in respect of which no
     adjustment pursuant to Section 15.5(f) has been made, exceeds
     20.0% of the product of the Current Market Price (determined as
     provided in Section 15.5(g)) on the Record Date with respect to
     such distribution times the number of shares of Common Stock
     outstanding on such date, then, and in each such case, immediately
     after the close of business on such date, unless the Company
     elects to reserve such cash for distribution to the holders of the
     Notes upon the conversion of the Notes so that any such holder
     converting Notes will receive upon such conversion, in addition to
     the shares of Common Stock to which such holder is entitled, the
     amount of cash which such holder would have received if such
     holder had, immediately prior to the Record Date for such
     distribution of cash, converted its Notes into Common Stock, the
     Conversion Price shall be reduced so that the same shall equal the
     price determined by multiplying the Conversion Price in effect
     immediately prior to the close of business on such date by a
     fraction (i) the numerator of which shall be equal to the Current
     Market Price on the Record Date less an amount equal to the
     quotient of (x) the excess of such combined amount over such 20.0%
     and (y) the number of shares of Common Stock outstanding on the
     Record Date and (ii) the denominator of which shall be equal to
     the Current Market Price on such date; provided, however, that in
     the event the portion of the cash so distributed applicable to one
     share of Common Stock is equal to or greater than the Current
     Market Price of the Common Stock on the Record Date, in lieu of
     the foregoing adjustment, adequate provision shall be made so that
     each Noteholder shall have the right to receive upon conversion
     the amount of cash such holder would have received had such holder
     converted each Note on the Record Date.  In the event that such
     dividend or distribution is not so paid or made, the Conversion
     Price shall again be adjusted to be the Conversion Price which
     would then be in effect if such dividend or distribution had not
     been declared.

               (f)  In case a tender offer made by the Company or any
     of its subsidiaries for all or any portion of the Common Stock
     shall expire and such tender offer (as amended upon the expiration
     thereof) shall require the payment to stockholders (based on the
     acceptance (up to any maximum specified in the terms of the tender
          offer) of Purchased Shares (as defined below)) of an aggregate
          consideration having a fair market value (as determined by the
          Board of Directors, whose determination shall be conclusive and
          described in a Board Resolution) that combined together with (1)
          the aggregate of the cash plus the fair market value (as
          determined by the Board of Directors, whose determination shall be
          conclusive and described in a Board Resolution), as of the
          expiration of such tender offer, of consideration payable in
          respect of any other tender offer, by the Company or any of its
          subsidiaries for all or any portion of the Common Stock expiring
          within the twelve (12) months preceding the expiration of such
          tender offer, and in respect of which no adjustment pursuant to
          this paragraph (f) has been made, and (2) the aggregate amount of
          any distributions to all holders of the Company's Common Stock
          made exclusively in cash within twelve (12) months preceding the
          expiration of such tender offer, and in respect of which no
          adjustment pursuant to paragraph (e) of this Section has been
          made, exceeds 20.0% of the product of the Current Market Price
          (determined as provided in paragraph (g) of this Section) as of
          the last time (the "Expiration Time") tenders could have been made
          pursuant to such tender offer (as it may be amended) times the
          number of shares of Common Stock outstanding (including any
          tendered shares) on the Expiration Time, then, and in each such
          case, immediately prior to the opening of business on the day
          after the date of the Expiration Time, the Conversion Price shall
          be adjusted so that the same shall equal the price determined by
          multiplying the Conversion Price in effect immediately prior to
          close of business on the date of the Expiration Time by a fraction
          of which the numerator shall be the number of shares of Common
          Stock outstanding (including any tendered shares) on the
          Expiration Time multiplied by the Current Market Price of the
          Common Stock on the Trading Day next succeeding the Expiration
          Time and the denominator shall be the sum of (x) the fair market
          value (determined as aforesaid) of the aggregate consideration
          payable to stockholders based on the acceptance (up to any maximum
          specified in the terms of the tender offer) of all shares validly
          tendered and not withdrawn as of the Expiration Time (the shares
          deemed so accepted, up to any such maximum, being referred to as
          the "Purchased Shares") and (y) the product of the number of
          shares of Common Stock outstanding (less any Purchased Shares) on
          the Expiration Time and the Current Market Price of the Common
          Stock on the Trading Day next succeeding the Expiration Time, such
          reduction to become effective immediately prior to the opening of
          business on the day following the Expiration Time.  In the event
          that the Company is obligated to purchase shares pursuant to any
          such tender offer, but the Company is permanently prevented by
          applicable law from effecting any such purchases or all such
          purchases are rescinded, the Conversion Price shall again be
          adjusted to be the Conversion Price which would then be in effect
          if such tender offer had not been made.

                    (g)  For purposes of this section 15.5, the following
          terms shall have the meaning indicated:

                    (1)  "Closing Price" with respect to any securities on
               any day shall mean the closing sale price regular way on such
               day or, in case no such sale takes place on such day, the
               average of the reported closing bid and asked prices, regular
               way, in each case on the New York Stock Exchange, or, if such
               security is not listed or admitted to trading on such
               Exchange, on the principal national security exchange or
               quotation system on which such security is quoted or listed
               or admitted to trading, or, if not quoted or listed or
               admitted to trading on any national securities exchange or
               quotation system, the average of the closing bid and asked
               prices of such security on the over-the-counter market on the
               day in question as reported by the National Quotation Bureau
               Incorporated, or a similar generally accepted reporting
               service, or if not so available, in such manner as furnished
               by any New York Stock Exchange member firm selected from time
               to time by the Board of Directors for that purpose, or a
               price determined in good faith by the Board of Directors
               whose determination shall be conclusive and described in a
               Board Resolution.

                    (2)  "Current Market Price" shall mean the average of
               the daily Closing Prices per share of Common Stock for the
               ten consecutive Trading Days immediately prior to the date in
               question; provided, however, that (1) if the "ex" date (as
               hereinafter defined) for any event (other than the issuance
               or distribution or Change of Control requiring such
               computation) that requires an adjustment to the Conversion
               Price pursuant to Section 15.5(a), (b), (c), (d), (e) or (f)
               occurs during such ten consecutive Trading Days, the Closing
               Price for each Trading Day prior to the "ex" date for such
               other event shall be adjusted by multiplying such Closing
               Price by the same fraction by which the Conversion Price is
               so required to be adjusted as a result of such other event,
               (2) if the "ex" date for any event (other than the issuance,
               distribution or Change of Control requiring such computation)
               that requires an adjustment to the Conversion Price pursuant
               to Section 15.5(a), (b), (c), (d), (e) or (f) occurs on or
               after the "ex" date for the issuance or distribution
               requiring such computation and prior to the day in question,
               the Closing Price for each Trading Day on and after the "ex"
               date for such other event shall be adjusted by multiplying
               such Closing Price by the reciprocal of the fraction by which
               the Conversion Price is so required to be adjusted as a
               result of such other event and (3) if the "ex" date for the
               issuance, distribution or Change of Control requiring such
               computation is prior to the day in question, after taking
               into account any adjustment required pursuant to clause (1)
               or (2) of this proviso, the Closing Price for each Trading
               Day on or after such "ex" date shall be adjusted by adding
               thereto the amount of any cash and the fair market value (as
               determined by the Board of Directors in a manner consistent
               with any determination of such value for purposes of Section
               15.5(d) or (f), whose determination shall be conclusive and
               described in a Board Resolution) of the evidences of
               indebtedness, shares of capital stock or assets being
               distributed applicable to one share of Common Stock as of the
               close of business on the day before such "ex" date.  For
               purposes of any computation under Section 15.5(f), the
               Current Market Price of the Common Stock on any date shall be
               deemed to be the average of the daily Closing Prices per
               share of Common Stock for such day and the next two
               succeeding Trading Days; provided, however, that if the "ex"
               date for any event (other than the tender or exchange offer
               requiring such computation) that requires an adjustment to
               the conversion Price pursuant to Section 15.5(a), (b), (c),
               (d), (e) or (f) occurs on or after the Expiration Time for
               the tender or exchange offer requiring such computation and
               prior to the day in question, the Closing Price for each
               Trading Day on and after the "ex" date for such other event
               shall be adjusted by multiplying such Closing Price by the
               reciprocal of the fraction by which the Conversion Price is
               so required to be adjusted as a result of such other event. 
               For purposes of this paragraph, the term "ex" date, (1) when
               used with respect to any issuance or distribution, means the
               first date on which the Common Stock trades regular way on
               the relevant exchange or in the relevant market from which
               the Closing Price was obtained without the right to receive
               such issuance or distribution, (2) when used with respect to
               any subdivision or combination of shares of Common Stock,
               means the first date on which the common Stock trades regular
               way on such exchange or in such market after the time at
               which such subdivision or combination becomes effective and
               (3) when used with respect to any tender or exchange offer
               means the first date on which the Common Stock trades regular
               way on such exchange or in such market after the expiration
               of such offer.  Notwithstanding the foregoing, whenever
               successive adjustments to the Conversion Price are called for
               pursuant to this Section 15.5, such adjustments shall be made
               to the Current Market Price as may be necessary or
               appropriate to effectuate the intent of this Section 15.5 and
               to avoid unjust or inequitable results as determined in good
               faith by the Board of Directors.

                    (3)  "fair market value" shall mean the amount which a
               willing buyer would pay a willing seller in an arm's-length
               transaction.

                    (4)  "Record Date" shall mean, with respect to any
               dividend, distribution or other transaction or event in which
               the holders of Common Stock have the right to receive any
               cash, securities or other property or in which the Common
               Stock (or other applicable security) is exchanged for or
               converted into any combination of cash, securities or other
               property, the date fixed for determination of stockholders
               entitled to receive such cash, securities or other property
               (whether such date is fixed by the Board of Directors or by
               statute, contract or otherwise).

                    (5)  "Trading Day" shall mean (x) if the applicable
               security is listed or admitted for trading on the New York
               Stock Exchange or another national security exchange, a day
               on which the New York Stock Exchange or that other national
               security exchange is open for business or (y) if the
               applicable security is quoted on the Nasdaq National Market,
               a day on which trades may be made thereon or (z) if the
               applicable security is not so listed, admitted for trading or
               quoted, any day other than a Saturday or Sunday or a day on
               which banking institutions in the State of New York are
               authorized or obligated by law or executive order to close.

                    (h)  The Company may make such reductions in the
          Conversion Price, in addition to those required by Sections
          15.5(a), (b), (c), (d), (e) and (f), as the Board of Directors
          considers to be advisable to avoid or diminish any income tax to
          holders of Common Stock or rights to purchase Common Stock
          resulting from any dividend or distribution of stock (or rights to
          acquire stock) or from any event treated as such for income tax
          purposes.  To the extent permitted by applicable law, the Company
          from time to time may reduce the Conversion Price by any amount
          for any period of time if the period is at least 20 days, the
          reduction is irrevocable during the period and the Board of
          Directors shall have made a determination that such reduction
          would be in the best interests of the Company, which determination
          shall be conclusive and described in a Board Resolution.  Whenever
          the Conversion Price is reduced pursuant to the preceding
          sentence, the Company shall mail to all holders of record of the
          Notes a notice of the reduction at least 15 days prior to the date
          the reduced Conversion Price takes effect, and such notice shall
          state the reduced Conversion Price and the period it will be in
          effect.

                    (i)  No adjustment in the Conversion Price shall be
          required unless such adjustment would require an increase or
          decrease of at least 1% in such price; provided, however, that any
          adjustments which by reason of this Section 15.5(i) are not
          required to be made shall be carried forward and taken into
          account in any subsequent adjustment.  All calculations under this
          Article XV shall be made by the Company and shall be made to the
          nearest cent or to the nearest one-hundredth of a share, as the
          case may be.

                    No adjustment need be made for rights to purchase Common
          Stock pursuant to a Company plan for reinvestment of dividends or
          interest.

                    No adjustment need be made for a change in the par
          value, or to or from no par value, of the Common Stock.

                    To the extent the Notes become convertible into cash,
          assets, property or securities (other than Common Stock of the
          Company), no adjustment need be made thereafter as to the cash,
          assets, property or such securities (except as such securities may
          otherwise by their terms provide), and interest shall not accrue
          on such cash.

                    (j)  Whenever the Conversion Price is adjusted as herein
          provided, the Company shall promptly file with the Trustee and any
          conversion agent other than the Trustee an Officers' Certificate
          setting forth the Conversion Price after such adjustment and
          setting forth a brief statement of the facts requiring such
          adjustment.  Promptly after delivery of such certificate, the
          Company shall prepare a notice of such adjustment of the
          Conversion Price setting forth the adjusted Conversion Price and
          the date on which each adjustment becomes effective and shall mail
          such notice of such adjustment of the Conversion Price to the
          holder of each Note at his last address appearing on the Note
          register provided for in Section 2.5 of this Indenture, within 20
          days after execution thereof.  Failure to deliver such notice
          shall not effect the legality or validity of any such supplemental
          indenture.

                    (k)  In any case in which this Section 15.5 provides
          that an adjustment shall become effective immediately after a
          Record Date for an event, the Company may defer until the
          occurrence of such event (i) issuing to the holder of any Note
          converted after such Record Date and before the occurrence of such
          event the additional shares of Common Stock issuable upon such
          conversion by reason of the adjustment required by such event over
          and above the Common Stock issuable upon such conversion before
          giving effect to such adjustment and (ii) paying to such holder
          any amount in cash in lieu of any fraction pursuant to Section
          15.3.

                    Section 15.6  Effect of Reclassification, Consolidation,
          Merger or Sale.  If any of the following events occur, namely (i)
          any reclassification or change of outstanding shares of Common
          Stock (other than a change in par value, or to or from no par
          value, as a result of a subdivision or combination), (ii) any
          consolidation, merger or combination of the Company with another
          corporation as a result of which holders of Common Stock shall be
          entitled to receive stock, securities or other property or assets
          (including cash) with respect to or in exchange for such Common
          Stock or (iii) any sale or conveyance of the properties and assets
          of the Company as, or substantially as, an entirety to any other
          corporation as a result of which holders of Common Stock shall be
          entitled to receive stock, securities or other property or assets
          (including cash) with respect to or in exchange for such Common
          Stock, then the Company or the successor or purchasing
          corporation, as the case may be, shall execute with the Trustee a
          supplemental indenture (which shall comply with the Trust
          Indenture Act as in force at the date of execution of such
          supplemental indenture if such supplemental indenture is then
          required to so comply) providing that such Note shall be
          convertible into the kind and amount of shares of stock and other
          securities or property or assets (including cash) receivable upon
          such reclassification, change, consolidation, merger, combination,
          sale or conveyance by a holder of a number of shares of Common
          Stock issuable upon conversion of such Notes (assuming, for such
          purposes, a sufficient number of authorized shares of Common Stock
          available to convert all such Notes) immediately prior to such
          reclassification, change, consolidation, merger, combination, sale
          or conveyance, assuming such holder of Common Stock did not
          exercise his rights of election, if any, as to the kind or amount
          of securities, cash or other property receivable upon such
          reclassification, change, consolidation, merger, combination, sale
          or conveyance (provided that, if the kind or amount of securities,
          cash or other property receivable upon such reclassification,
          change, consolidation, merger, combination, sale or conveyance is
          not the same for each share of Common Stock in respect of which
          such rights of election shall not have been exercised ("non-
          electing share"), then for the purposes of this Section 15.6 the
          kind and amount of securities, cash or other property receivable
          upon such reclassification, change, consolidation, merger,
          combination, sale or conveyance for each non-electing share shall
          be deemed to be the kind and amount so receivable per share by a
          plurality of the non-electing shares).  Such supplemental
          indenture shall provide for adjustments which shall be as nearly
          equivalent as may be practicable to the adjustments provided for
          in this Article XV.

                    The Company shall cause notice of the execution of such
          supplemental indenture to be mailed to each holder of Notes, at
          his address appearing on the Note register provided for in Section
          2.5 of this Indenture, within 20 days after execution thereof. 
          Failure to deliver such notice shall not affect the legality or
          validity of such supplemental indenture.

                    The above provisions of this Section shall similarly
          apply to successive reclassifications, changes, consolidations,
          mergers, combinations, sales and conveyances.  

                    If this Section 15.6 applies to any event or occurrence,
          Section 15.5 shall not apply.

                    Section 15.7  Transfer or Similar Taxes on Shares
          Issued.  The issue of stock certificates on conversions of Notes
          shall be made without charge to the converting Noteholder for any
          transfer or similar tax in respect of the issue thereof.  The
          Company shall not, however, be required to pay any such tax which
          may be payable in respect of any transfer involved in the issue
          and delivery of stock in any name other than that of the holder of
          any Note converted, and the Company shall not be required to issue
          or deliver any such stock certificate unless and until the person
          or persons requesting the issue thereof shall have paid to the
          Company the amount of such tax or shall have established to the
          satisfaction of the Company that such tax has been paid.

                    Section 15.8  Reservation of Shares; Shares to Be Fully
          Paid; Listing of Common Stock.  The Company shall provide, free
          from preemptive rights, out of its authorized but unissued shares
          or shares held in treasury, sufficient shares to provide for the
          conversion of the Notes from time to time as such Notes are
          presented for conversion.

                    Before taking any action which would cause an adjustment
          reducing the Conversion Price below the then par value, if any, of
          the shares of Common Stock issuable upon conversion of the Notes,
          the Company will take all corporate action which may, in the
          opinion of its counsel, be necessary in order that the Company may
          validly and legally issue shares of such Common Stock at such
          adjusted Conversion Price.

                    The Company covenants that all shares of Common Stock
          which may be issued upon conversion of Notes will, upon issue, be
          fully paid and nonassessable by the Company and free from all
          transfer or similar taxes as described in Section 15.7, liens and
          charges with respect to the issue thereof.

                    The Company further covenants that, if at any time the
          Common Stock shall be listed on the New York Stock Exchange or any
          other national securities exchange, the Company will, if permitted
          by the rules of such exchange, list and keep listed, so long as
          the Common Stock shall be so listed on such exchange, all Common
          Stock issuable upon conversion of the Notes.

                    Section 15.9  Responsibility of Trustee.  The Trustee
          and any other conversion agent shall not at any time be under any
          duty or responsibility to any holder of Notes to determine whether
          any facts exist which may require any adjustment of the Conversion
          Price, or with respect to the nature or extent or calculation of
          any such adjustment when made, or with respect to the method
          employed, or herein or in any supplemental indenture provided to
          be employed, in making the same.  The Trustee and any other
          conversion agent shall not be accountable with respect to the
          validity or value (or the kind or amount) of any shares of Common
          Stock, or of any securities or property, which may at any time be
          issued or delivered upon the conversion of any Note; and the
          Trustee and any other conversion agent make no representations
          with respect thereto.  Subject to the provisions of Section 8.1,
          neither the Trustee nor any conversion agent shall be responsible
          for any failure of the Company to issue, transfer or deliver any
          shares of Common Stock or stock certificates or other securities
          or property or cash upon the surrender of any debenture for the
          purpose of conversion or to comply with any of the duties,
          responsibilities or covenants of the Company contained in this
          Article XV.  Without limiting the generality of the foregoing,
          neither the Trustee nor any conversion agent shall be under any
          responsibility to determine the correctness of any provisions
          contained in any supplemental indenture entered into pursuant to
          Section 15.6 relating either to the kind or amount of shares of
          stock or securities or property (including cash) receivable by
          Noteholders upon the conversion of their Notes after any event
          referred to in such Section 15.6 or to any adjustment to be made
          with respect thereto, but, subject to the provisions of Section
          8.1, may accept as conclusive evidence of the correctness of any
          such provisions, and shall be protected in relying upon, the
          Officers' Certificate (which the Company shall be obligated to
          file with the Trustee prior to the execution of any such
          supplemental indenture) with respect thereto.

                    Section 15.10  Notice to Holders Prior to Certain
          Actions.  In case:

                    (a)  the Company makes any distribution or dividend that
               would require an adjustment in the Conversion Price pursuant
               to Section 15.5; or

                    (b)  the Company takes any action that would require a
               supplemental indenture pursuant to Section 15.6; or

                    (c)  of the voluntary or involuntary dissolution,
               liquidation or winding-up of the Company, the Company shall
               cause to be filed with the Trustee and to be mailed to each
               holder of Notes at his address appearing on the Note register
               provided for in Section 2.5 of this Indenture, as promptly as
               possible but in any event at least 15 days prior to the
               applicable date hereinafter specified, a notice stating (x)
               the date on which a record date is to be taken for the
               purpose of such dividend, distribution, rights or warrants,
               or, if a record is not to be taken, the date as of which the
               holders of Common Stock of record to be entitled to such
               dividend, distribution, rights or warrants are to be
               determined or (y) the date on which such reclassification,
               change, consolidation, merger, sale, conveyance, transfer,
               dissolution, liquidation or winding-up is expected to become
               effective or occur and the date as of which it is expected
               that holders of record of Common Stock shall be entitled to
               exchange their Common Stock for securities or other property
               deliverable upon such reclassification, change consolidation,
               merger, sale, conveyance, transfer, dissolution, liquidation
               or winding-up.  Failure to give such notice, or any defect
               therein, shall not affect the legality or validity of such
               dividend, distribution, reclassification, change,
               consolidation, merger, sale, conveyance, transfer,
               dissolution, liquidation or winding-up.  Neither the failure
               to give such notice nor any defect therein shall affect the
               legality or validity of the proceedings referenced in clauses
               (a) through (c) of this Section 15.10.

                                     ARTICLE XVI

                               MISCELLANEOUS PROVISIONS

                    Section 16.1  Provisions Binding on Company's
          Successors.  All the covenants, stipulations, promises and
          agreements in this Indenture made by the Company shall bind its
          successors and assigns whether so expressed or not.

                    Section 16.2  Official Acts by Successor Company.  Any
          act or proceeding by any provision of this Indenture authorized or
          required to be done or performed by any board (including the Board
          of Directors), committee or officer of the Company shall and may
          be done and performed with like force and effect by the like
          board, committee or officer of any corporation that shall at the
          time be the lawful sole successor of the Company.

                    Section 16.3  Addresses for Notices, Etc.  Any notice or
          demand which by any provision of this Indenture is required or
          permitted to be given or served by the Trustee or by the holders
          of Notes on the Company shall be deemed to have been sufficiently
          given or made, for all purposes if given or served by being
          deposited postage prepaid by registered or certified mail in a
          post office letter box addressed (until another address is filed
          by the Company with the Trustee) to SoftKey International Inc.,
          One Athenaeum Street, Cambridge, MA 02142, Attention: Chief
          Financial Officer.  Any notice, direction, request or demand
          hereunder to or upon the Trustee shall be deemed to have been
          sufficiently given or made, for all purposes, if given or served
          by being deposited postage prepaid by registered or certified mail
          in a post office letter box addressed to the Corporate Trust
          Office of the Trustee, which office is, at the date as of which
          this Indenture is dated, located at 225 Franklin Street, Boston,
          MA 02110.

                    The Trustee, by notice to the Company, may designate
          additional or different addresses for subsequent notices or
          communications.

                    Any notice or communication mailed to a Noteholder shall
          be mailed to him by first class mail, postage prepaid, at his
          address as it appears on the Note register and shall be
          sufficiently given to him if so mailed within the time prescribed.

                    Failure to mail a notice or communication to a
          Noteholder or any defect in it shall not affect its sufficiency
          with respect to other Noteholders.  If a notice or communication
          is mailed in the manner provided above, it is duly given, whether
          or not the addressee receives it.

                    Section 16.4  Governing Law.  This Indenture and each
          Note shall be deemed to be a contract made under the substantive
          laws of New York and for all purposes shall be construed in
          accordance with the substantive laws of New York.

                    Section 16.5  Evidence of Compliance with Conditions
          Precedent; Certificates to Trustee.  Upon any application or
          demand by the Company to the Trustee to take any action under any
          of the provisions of this Indenture, the Company shall furnish to
          the Trustee an Officers' Certificate stating that all conditions
          precedent, if any, provided for in this Indenture relating to the
          proposed action have been complied with, and an Opinion of Counsel
          stating that, in the Opinion of such counsel, all such conditions
          precedent have been complied with.

                    Each certificate or opinion provided for in this
          Indenture and delivered to the Trustee with respect to compliance
          with a condition or covenant provided for in this Indenture shall
          include: (1) a statement that the person making such certificate
          or opinion has read such covenant or condition; (2) a brief
          statement as to the nature and scope of the examination or
          investigation upon which the statement or opinion contained in
          such certificate or opinion is based; (3) a statement that, in the
          opinion of such person, he has made such examination or
          investigation as is necessary to enable him to express an informed
          opinion as to whether or not such covenant or condition has been
          complied with; and (4) a statement as to whether or not, in the
          opinion of such person, such condition or covenant has been
          complied with.

                    Section 16.6  Legal Holidays.  In any case where the
          date of maturity of interest on or principal of the Notes or the
          date fixed for redemption of any Note will not be a Business Day,
          then payment of such interest on or principal of the Notes need
          not be made on such date, but may be made on the next succeeding
          Business Day with the same force and effect as if made on the date
          of maturity or the date fixed for redemption, and no interest
          shall accrue for the period from and after such date.

                    Section 16.7  No Security Interest Created.  Nothing in
          this Indenture or in the Notes, expressed or implied, shall be
          construed to constitute a security interest under the Uniform
          Commercial Code or similar legislation, as now or hereafter
          enacted and in effect, in any jurisdiction where property of the
          Company or its subsidiaries is located.

                    Section 16.8  Trust Indenture Act.  This Indenture is
          hereby made subject to, and shall be governed by, the provisions
          of the Trust Indenture Act required to be part of and to govern
          indentures qualified under the Trust Indenture Act; provided,
          however, that, notwithstanding the foregoing, this Indenture and
          the Notes issued hereunder shall not be subject to the provisions
          of subsections (a)(1), (a)(2) and (a)(3) of Section 314 of the
          Trust Indenture Act as now in effect or as hereafter amended or
          modified.

                    Section 16.9  Benefits of Indenture.  Nothing in this
          Indenture or in the Notes, expressed or implied, shall give to any
          person, other than the parties hereto, any paying agent, any
          authenticating agent, any Note registrar and their successors
          hereunder and the holders of Notes, any benefit or any legal or
          equitable right, remedy or claim under this Indenture.

                    Section 16.10  Table of Contents, Headings Etc.  The
          table of contents and the titles and headings of the articles and
          sections of this Indenture have been inserted for convenience of
          reference only, are not to be considered a part hereof, and shall
          in no way modify or restrict any of the terms or provisions
          hereof.

                    Section 16.11  Authenticating Agent.  The Trustee may
          appoint an authenticating agent which shall be authorized to act
          on its behalf and subject to its direction in the authentication
          and delivery of Notes in connection with the original issuance
          thereof and transfers and exchanges of Notes hereunder, including
          under Sections 2.4, 2.5, 2.6, 2.7 and 3.3, as fully to all intents
          and purposes as though the authenticating agent had been expressly
          authorized by this Indenture and those Sections to authenticate
          and deliver Notes.  For all purposes of this Indenture, the
          authentication and delivery of Notes by the authenticating agent
          shall be deemed to be authentication and delivery of such Notes
          "by the Trustee" and a certificate of authentication executed on
          behalf of the Trustee by an authenticating agent shall be deemed
          to satisfy any requirement hereunder or in the Notes for the
          Trustee's certificate of authentication.  Such authenticating
          agent shall at all times be a person eligible to serve as Trustee
          hereunder pursuant to Section 8.9.

                    Any corporation into which any authenticating agent may
          be merged or converted or with which it may be consolidated, or
          any corporation resulting from any merger, consolidation or
          conversion to which any authenticating agent shall be a party, or
          any corporation succeeding to the corporate trust business of any
          authenticating agent, shall be the successor of the authenticating
          agent hereunder, if such Successor Company is otherwise eligible
          under this Section, without the execution or filing of any paper
          or any further act on the part of the parties hereto or the
          authenticating agent or such Successor Company.

                    Any authenticating agent may at any time resign by
          giving written notice of resignation to the Trustee and to the
          Company.  The Trustee may at any time terminate the agency of any
          authenticating agent by giving written notice of termination to
          such authenticating agent and to the Company.  Upon receiving such
          a notice of resignation or upon such a termination, or in case at
          any time any authenticating agent shall cease to be eligible under
          this Section, the Trustee shall promptly appoint a successor
          authenticating agent (which may be the Trustee), shall give
          written notice of such appointment to the Company and shall mail
          notice of such appointment to all holders of Notes as the names
          and addresses of such holders appear on the Note register.

                    The Trustee agrees to pay to the authenticating agent
          from time to time reasonable compensation for its services, and
          the Trustee shall be entitled to be reimbursed for such payments,
          subject to Section 8.6.

                    The provisions of Sections 8.2, 8.3, 8.4, 9.3 and this
          Section 16.11 shall be applicable to any authenticating agent.

                    Section 16.12  Execution in Counterparts.  This
          Indenture may be executed in any number of counterparts, each of
          which shall be an original, but such counterparts shall together
          constitute but one and the same instrument.

                    Section 16.13  Pooling of Interests.  The Company
          desires to preserve its ability to account for acquisition and
          other business combination transactions using the pooling of
          interests method where appropriate, and the provisions of this
          Indenture shall be interpreted accordingly.

                                     ARTICLE XVII

                                   EXCHANGE OF NOTES

                    Section 17.1  Right to Exchange.  Subject to and upon
          compliance with the provisions of this Indenture, the holder of
          any Note shall have the right, at his option, at any time prior to
          the close of business on November 1, 2000 (except that, with
          respect to any Note or portion of a Note which shall be called for
          redemption or delivered for repurchase, such right shall
          terminate, except as provided in the fourth paragraph of Section
          17.2, at the close of business on the last Trading Day prior to
          the date fixed for redemption of such Note or portion of a Note
          unless the Company shall default in payment due upon redemption
          thereof) to exchange the principal amount of any such Note, or any
          portion of such principal amount which is $1,000 or an integral
          multiple thereof, into that number of fully paid and nonassessable
          shares of Preferred Stock (as such shares shall then be
          constituted) obtained by dividing the principal amount of the Note
          or portion thereof surrendered for exchange by the Exchange Price
          in effect at such time, by surrender of the Note so to be
          converted in whole or in part in the manner provided in Section
          17.2.  A holder of Notes is not entitled to any rights of a holder
          of Preferred Stock until such holder has converted his Notes to
          Preferred Stock, and only to the extent such Notes are deemed to
          have been exchanged for Preferred Stock under this Article XVII.

                    Section 17.2  Exercise of Exchange Privilege; Issuance
          of Preferred Stock on Exchange; Adjustment for Interest or
          Dividends.  In order to exercise the exchange privilege with
          respect to any Note in definitive form, the holder of any such
          Note to be converted in whole or in part shall surrender such
          Note, duly endorsed, at an office or agency maintained by the
          Company pursuant to Section 5.2, accompanied by the funds, if any,
          required by the penultimate paragraph of this Section 17.2, and
          shall give written notice of exchange in the form provided on the
          Notes (or such other notice which is acceptable to the Company) to
          the office or agency that the holder elects to exchange such Note
          or the portion thereof specified in said notice.  Such notice
          shall also state the name or names (with address) in which the
          certificate or certificates for shares of Preferred Stock which
          shall be issuable on such conversion shall be issued and shall be
          accompanied by transfer taxes, if required pursuant to Section
          17.7.  Each such Note surrendered for exchange shall, unless the
          shares issuable on exchange are to be issued in the same name as
          the registration of such Note, be duly endorsed by, or be
          accompanied by instruments of transfer in form satisfactory to the
          Company duly executed by, the holder or his duly authorized
          attorney.

                    In order to exercise the exchange privilege with respect
          to any interest in a Note in global form, the beneficial holder
          must complete the appropriate instruction form for exchange
          pursuant to the Depositary's book-entry exchange program and
          follow the other procedures set forth in such program.

                    As promptly as practicable after satisfaction of the
          requirements for exchange set forth above, subject to compliance
          with any restrictions on transfer if shares issuable on exchange
          are to be issued in a name other than that of the Noteholder (as
          if such transfer were a transfer of the Note or Notes (or portion
          thereof) so exchanged), the Company shall issue and shall deliver
          to such holder at the office or agency maintained by the Company
          for such purpose pursuant to Section 5.2, a certificate or
          certificates for the number of full shares issuable upon the
          exchange of such Note or portion thereof in accordance with the
          provisions of this Article XVII.  In case any Note of a
          denomination greater than $1,000 shall be surrendered for partial
          exchange, and subject to Section 2.3, the Company shall execute
          and the Trustee shall authenticate and deliver to the holder of
          the Note so surrendered, without charge to him, a new Note or
          Notes in authorized denominations in an aggregate principal amount
          equal to the exchanged portion of the surrendered Note.

                    Each exchange shall be deemed to have been effected as
          to any such Note (or portion thereof) on the date on which the
          requirements set forth above in this Section 17.2 have been
          satisfied as to such Note (or portion thereof), and the person in
          whose name any certificate or certificates for shares of Preferred
          Stock shall be issuable upon such exchange shall be deemed to have
          become on said date the holder of record of the shares represented
          thereby; provided, however, that any such surrender on any date
          when the stock transfer books of the Company shall be closed shall
          constitute the person in whose name the certificates are to be
          issued as the record holder thereof for all purposes on the next
          succeeding day on which such stock transfer books are open, but
          such exchange shall be at the Exchange Price in effect on the date
          upon which such Note shall have been surrendered.

                    Any Note or portion thereof surrendered for exchange
          during the period from the close of business on the record date
          for any interest payment date through the close of business on the
          Trading Day next preceding such interest payment date shall
          (unless such Note or portion thereof being converted shall have
          been called for redemption on a date in such period) be
          accompanied by payment, in funds acceptable to the Company, of an
          amount equal to the interest otherwise payable on such interest
          payment date on the principal amount being converted; provided,
          however, that no such payment need be made if there shall exist at
          the time of exchange a default in the payment of interest on the
          Notes.  An amount equal to such payment shall be paid by the
          Company on such interest payment date to the holder of such Note
          at the close of business on such record date; provided, however,
          that if the Company shall default in the payment of interest on
          such interest payment date, such amount shall be paid to the
          person who made such required payment.  In the case of any
          exchange, dividends on the Preferred Stock issuable upon such
          exchange will commence to accrue as of the most recent date as of
          which interest has been paid, or duly provided for, on the Notes
          unless no interest has been paid or duly provided for on the
          Notes, in which case from ____________, 1995.  Except as provided
          above in this Section 17.2, no adjustment shall be made for
          interest accrued on any Note converted or for dividends on any
          shares issued upon the exchange of such Note as provided in this
          Article.

                    Upon the exchange of an interest in a Note in global
          form, the Trustee, or the Custodian at the direction of the
          Trustee, shall make a notation on such Note in global form as to
          the reduction in the principal amount represented thereby.

                    Section 17.3  Cash Payments in Lieu of Fractional
          Shares.  No fractional shares of Preferred Stock or scrip
          representing fractional shares shall be issued upon exchange of
          Notes.  If more than one Note shall be surrendered for exchange at
          one time by the same holder, the number of full shares which shall
          be issuable upon exchange shall be computed on the basis of the
          aggregate principal amount of the Notes (or specified portions
          thereof to the extent permitted hereby) so surrendered.  If any
          fractional share of stock would be issuable upon the exchange of
          any Note or Notes, the Company shall make an adjustment therefor
          in cash at the current market value thereof.  The Current Market
          Value of a share of Preferred Stock shall be the greater of (i)
          the Liquidation Preference thereof or (ii) the current market
          value of that number of shares of Common Stock (including any
          fraction of a share) into which one share of Preferred Stock may
          then be converted.  The current market value of a share of Common
          Stock shall be the Closing Price on the first Trading Day
          immediately preceding the day on which the Notes (or specified
          portions thereof) are deemed to have been converted and such
          Closing Price shall be determined as provided in Section 15.5(g).

                    Section 17.4  Exchange Price.  The exchange price shall
          be $1000.00 (herein called the "Exchange Price").

                    Section 17.5  Adjustment of Exchange Price.  The
          Exchange Price shall be adjusted from time to time by the Company
          as follows:

                    (a)  In the event that the provisions of the Series C
          Preferred Stock as set forth in the Certificate of Designation
          attached as Exhibit C hereto shall at any time be amended in
          accordance with the provisions of the Certificate of Designation
          and this Indenture, to reduce the Liquidation Preference of, or
          the amount of dividends or other distributions payable with
          respect to, the Series C Preferred Stock, or to change the
          Conversion Price at which such Series C Preferred Stock is
          convertible into Common Stock pursuant to the provisions of the
          Certificate of Designation (or the manner in which such Conversion
          Price is adjusted as set forth in Section 8 thereof), the Exchange
          Price shall be adjusted in such manner as the Board of Directors
          of the Company shall determine is fair and equitable, which
          determination shall be conclusive and shall be set forth in a
          Board Resolution.

                    (b)  The Company may make such reductions in the
          Conversion Price, in addition to those required by Section
          17.5(a), as the Board of Directors considers to be advisable to
          avoid or diminish any income tax to holders of Preferred Stock or
          rights to purchase Preferred Stock resulting from any dividend or
          distribution of stock (or rights to acquire stock) or from any
          event treated as such for income tax purposes.  To the extent
          permitted by applicable law, the Company from time to time may
          reduce the Exchange Price by any amount for any period of time if
          the period is at least 20 days, the reduction is irrevocable
          during the period and the Board of Directors shall have made a
          determination that such reduction would be in the best interests
          of the Company, which determination shall be conclusive and
          described in a Board Resolution.  Whenever the Exchange Price is
          reduced pursuant to the preceding sentence, the Company shall mail
          to all holders of record of the Notes a notice of the reduction at
          least 15 days prior to the date the reduced Exchange Price takes
          effect, and such notice shall state the reduced conversion Price
          and the period it will be in effect.

                    (c)  No adjustment in the Exchange Price shall be
          required unless such adjustment would require an increase or
          decrease of at least 1% in such price; provided, however, that any
          adjustments which by reason of this Section 17.5(c) are not
          required to be made shall be carried forward and taken into
          account in any subsequent adjustment.  All calculations under this
          Article XVII shall be made by the Company and shall be made to the
          nearest cent or to the nearest one-hundredth of a share, as the
          case may be.

                    No adjustment need be made for a change in the par
          value, or to or from no par value, of the Preferred Stock.

                    To the extent the Notes become convertible into cash,
          assets, property or securities (other than Preferred Stock or
          Common Stock of the Company), no adjustment need be made
          thereafter as to the cash, assets, property or such securities
          (except as such securities may otherwise by their terms provide),
          and interest shall not accrue on such cash.

                    (d)  whenever the Exchange Price is adjusted as herein
          provided, the Company shall promptly file with the Trustee and any
          exchange agent other than the Trustee an Officers' Certificate
          setting forth the Exchange Price after such adjustment and setting
          forth a brief statement of the facts requiring such adjustment. 
          Promptly after delivery of such certificate, the Company shall
          prepare a notice of such adjustment of the Exchange Price setting
          forth the adjusted Exchange Price and the date on which each
          adjustment becomes effective and shall mail such notice of such
          adjustment of the Exchange Price to the holder of each Note at his
          last address appearing on the Note register provided for in
          Section 2.5 of this Indenture, within 20 days after execution
          thereof.  Failure to deliver such notice shall not effect the
          legality or validity of any such supplemental indenture.

                    (e)  In any case in which this Section 17.5 provides
          that an adjustment shall become effective immediately after a
          Record Date for an event, the Company may defer until the
          occurrence of such event (i) issuing to the holder of any Note
          converted after such Record Date and before the occurrence of such
          event the additional shares of Preferred Stock issuable upon such
          conversion by reason of the adjustment required by such event over
          and above the Preferred Stock issuable upon such conversion before
          giving effect to such adjustment and (ii) paying to such holder
          any amount in cash in lieu of any fraction pursuant to Section
          17.3.

                    Section 17.6  Effect of Reclassification, Consolidation,
          Merger or Sale.  If any of the following events occur, namely (i)
          any reclassification or change of outstanding shares of Preferred
          Stock (other than a change in par value, or to or from no par
          value, as a result of a subdivision or combination), (ii) any
          consolidation, merger or combination of the Company with another
          corporation as a result of which holders of Preferred Stock shall
          be entitled to receive stock, securities or other property or
          assets (including cash) with respect to or in exchange for such
          Preferred Stock or (iii) any sale or conveyance of the properties
          and assets of the Company as, or substantially as, an entirety to
          any other corporation as a result of which holders of Preferred
          Stock shall be entitled to receive stock, securities or other
          property or assets (including cash) with respect to or in exchange
          for such Preferred Stock, then the Company or the successor or
          purchasing corporation, as the case may be, shall execute with the
          Trustee a supplemental indenture (which shall comply with the
          Trust Indenture Act as in force at the date of execution of such
          supplemental indenture if such supplemental indenture is then
          required to so comply) providing that such Note shall be
          exchangeable into the kind and amount of shares of stock and other
          securities or property or assets (including cash) receivable upon
          such reclassification, change, consolidation, merger, combination,
          sale or conveyance by a holder of a number of shares of Preferred
          Stock issuable upon exchange of such Notes (assuming, for such
          purposes, a sufficient number of authorized shares of Preferred
          Stock available to exchange all such Notes) immediately prior to
          such reclassification, change, consolidation, merger, combination,
          sale or conveyance, assuming such holder of Preferred Stock did
          not exercise his rights of election, if any, as to the kind or
          amount of securities, cash or other property receivable upon such
          reclassification, change, consolidation, merger, combination, sale
          or conveyance (provided that, if the kind or amount of securities,
          cash or other property receivable upon such reclassification,
          change, consolidation, merger, combination, sale or conveyance is
          not the same for each share of Preferred Stock in respect of which
          such rights of election shall not have been exercised ("non-
          electing share"), then for the purposes of this Section 17.6 the
          kind and amount of securities, cash or other property receivable
          upon such reclassification, change, consolidation, merger,
          combination, sale or conveyance for each non-electing share shall
          be deemed to be the kind and amount so receivable per share by a
          plurality of the non-electing shares).  Such supplemental
          indenture shall provide for adjustments which shall be as nearly
          equivalent as may be practicable to the adjustments provided for
          in this Article XVII.

                    The Company shall cause notice of the execution of such
          supplemental indenture to be mailed to each holder of Notes, at
          his address appearing on the Note register provided for in Section
          2.5 of this Indenture, within 20 days after execution thereof. 
          Failure to deliver such notice shall not affect the legality or
          validity of such supplemental indenture.

                    The above provisions of this Section shall similarly
          apply to successive reclassifications, changes, consolidations,
          mergers, combinations, sales and conveyances.  

                    Section 17.7  Transfer or Similar Taxes on Shares
          Issued.  The issue of stock certificates on exchanges of Notes
          shall be made without charge to the exchanging Noteholder for any
          transfer or similar tax in respect of the issue thereof.  The
          Company shall not, however, be required to pay any such tax which
          may be payable in respect of any transfer involved in the issue
          and delivery of stock in any name other than that of the holder of
          any Note converted, and the Company shall not be required to issue
          or deliver any such stock certificate unless and until the person
          or persons requesting the issue thereof shall have paid to the
          Company the amount of such tax or shall have established to the
          satisfaction of the Company that such tax has been paid.

                    Section 17.8  Reservation of Stock; Shares to Be Fully
          Paid; Listing of Preferred Stock.  The Company shall provide, free
          from preemptive rights, out of its authorized but unissued shares
          or shares held in treasury, sufficient shares to provide for the
          exchange of the Notes from time to time as such Notes are
          presented for exchange. 

                    Before taking any action which would cause an adjustment
          reducing the Exchange Price below the then par value, if any, of
          the shares of Preferred Stock issuable upon exchange of the Notes,
          the Company will take all corporate action which may, in the
          opinion of its counsel, be necessary in order that the Company may
          validly and legally issue shares of such Preferred Stock at such
          adjusted Exchange Price.

                    The Company covenants that all shares of Preferred Stock
          which may be issued upon exchange of Notes will, upon issue, be
          fully paid and nonassessable by the Company and free from all
          transfer or similar taxes as described in Section 17.7, liens and
          charges with respect to the issue thereof.

                    The Company further covenants that, if at any time the
          Preferred Stock shall be listed on the New York Stock Exchange or
          any other national securities exchange, the Company will, if
          permitted by the rules of such exchange, list and keep listed, so
          long as the Preferred Stock shall be so listed on such exchange,
          all Preferred Stock issuable upon exchange of the Notes.

                    Section 17.9  Responsibility of Trustee.  The Trustee
          and any other exchange agent shall not at any time be under any
          duty or responsibility to any holder of Notes to determine whether
          any facts exist which may require any adjustment of the Exchange
          Price, or with respect to the nature or extent or calculation of
          any such adjustment when made, or with respect to the method
          employed, or herein or in any supplemental indenture provided to
          be employed, in making the same.  The Trustee and any other
          conversion agent shall not be accountable with respect to the
          validity or value (or the kind or amount) of any shares of
          Preferred Stock, or of any securities or property, which may at
          any time be issued or delivered upon the exchange of any Note; and
          the Trustee and any other exchange agent make no representations
          with respect thereto.  Subject to the provisions of Section 8.1,
          neither the Trustee nor any exchange agent shall be responsible
          for any failure of the Company to issue, transfer or deliver any
          shares of Preferred Stock or stock certificates or other
          securities or property or cash upon the surrender of any debenture
          for the purpose of exchange or to comply with any of the duties,
          responsibilities or covenants of the Company contained in this
          Article XVII, without limiting the generality of the foregoing,
          neither the Trustee nor any exchange agent shall be under any
          responsibility to determine the correctness of any provisions
          contained in any supplemental indenture entered into pursuant to
          Section 17.6 relating either to the kind or amount of shares of
          stock or securities or property (including cash) receivable by
          Noteholders upon the exchange of their Notes after any event
          referred to in such Section 17.6 or to any adjustment to be made
          with respect thereto, but, subject to the provisions of Section
          8.1, may accept as conclusive evidence of the correctness of any
          such provisions, and shall be protected in relying upon, the
          Officers' Certificate (which the Company shall be obligated to
          file with the Trustee prior to the execution of any such
          supplemental indenture) with respect thereto.

                    Section 17.10  Notice to Holders Prior to Certain
          Actions.  In case:

                    (a)  the Company takes any action that would require a
          supplemental indenture pursuant to Section 17.6; or

                    (b)  of the voluntary or involuntary dissolution,
          liquidation or winding-up of the Company, the Company shall cause
          to be filed with the Trustee and to be mailed to each holder of
          Notes at his address appearing on the Note register provided for
          in Section 2.5 of this Indenture, as promptly as possible but in
          any event at least 15 days prior to the applicable date
          hereinafter specified, a notice stating (x) the date on which a
          record date is to be taken for the purpose of such dividend,
          distribution, rights or warrants, or, if a record is not to be
          taken, the date as of which the holders of Preferred Stock of
          record to be entitled to such dividend, distribution, rights or
          warrants are to be determined or (y) the date on which such
          reclassification, change, consolidation, merger, sale, conveyance,
          transfer, dissolution, liquidation or winding-up is expected to
          become effective or occur and the date as of which it is expected
          that holders of record of Preferred Stock shall be entitled to
          exchange their Preferred Stock for securities or other property
          deliverable upon such reclassification, change consolidation,
          merger, sale, conveyance, transfer, dissolution, liquidation or
          winding-up.  Failure to give such notice, or any defect therein,
          shall not affect the legality or validity of such dividend,
          distribution, reclassification, change, consolidation, merger,
          sale, conveyance, transfer, dissolution, liquidation or winding-
          up.  Neither the failure to give such notice nor any defect
          therein shall affect the legality or validity of the proceedings
          referenced in clauses (a) through (b) of this Section 17.10.

                    State Street Bank and Trust Company hereby accepts the
          trusts in this Indenture declared and provided, upon the terms and
          conditions hereinabove set forth.

               IN WITNESS WHEREOF, the parties hereto have caused this
          Indenture to be duly signed, and their respective corporate seals
          to be hereunto affixed and attested, all as of the date first
          written above.

                                             SOFTKEY INTERNATIONAL INC.

                                             By:  
                                             Name:  
                                             Title: 

          Attest:

          ________________________

                                             STATE STREET BANK AND TRUST
                                             COMPANY, as Trustee

                                             By: ___________________
                                             Name: _________________
                                             Title:                 

          Attest:

          _______________________



                          EXHIBIT A - FORM OF DEFINITIVE NOTE

                              [FORM OF FACE OF NOTE]

          No. B-1                                           $_______________
                                                             CUSIP          
                                                                            

          SOFTKEY INTERNATIONAL INC.

          5 1/2% Senior Convertible/Exchangeable Note Due 2000

               THE NOTE EVIDENCED HEREBY HAS NOT BEEN REGISTERED UNDER THE
               U.S. SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES
               ACT"), OR ANY STATE SECURITIES LAWS, AND MAY NOT BE OFFERED
               OR SOLD WITHIN THE UNITED STATES OR TO, OR FOR THE ACCOUNT OR
               BENEFIT OF, U.S. PERSONS EXCEPT AS SET FORTH IN THE FOLLOWING
               SENTENCE.  BY ACQUISITION HEREOF, THE HOLDER (1) REPRESENTS
               THAT (A) IT IS A "QUALIFIED INSTITUTIONAL BUYER" (AS DEFINED
               IN RULE 144A UNDER THE SECURITIES ACT) OR (B) IT IS AN
               INSTITUTIONAL "ACCREDITED INVESTOR" (AS DEFINED IN RULE
               501(A) (1), (2), (3) OR (7) UNDER THE SECURITIES ACT)
               ("INSTITUTIONAL ACCREDITED INVESTOR",) OR (C) IT IS NOT A
               U.S. PERSON AND IS ACQUIRING THE NOTE EVIDENCED HEREBY IN AN
               OFFSHORE TRANSACTION; (2) AGREES THAT IT WILL NOT PRIOR TO
               THE DATE THAT IS THREE YEARS AFTER THE LATER OF THE ORIGINAL
               ISSUANCE OF THE NOTE EVIDENCED HEREBY AND THE LAST DATE ON
               WHICH SOFTKEY INTERNATIONAL INC. (THE "COMPANY") OR ANY
               "AFFILIATE" (AS DEFINED IN RULE 144 UNDER THE SECURITIES ACT)
               OF THE COMPANY WAS THE OWNER OF THE NOTE (THE "RESTRICTION
               TERMINATION DATE") RESELL OR OTHERWISE TRANSFER THE NOTE
               EVIDENCED HEREBY OR THE PREFERRED STOCK ISSUABLE UPON
               EXCHANGE OF SUCH NOTE OR THE COMMON STOCK ISSUABLE UPON
               CONVERSION OF SUCH NOTE EXCEPT (A) TO THE COMPANY OR ANY
               SUBSIDIARY THEREOF, (B) TO A QUALIFIED INSTITUTIONAL BUYER IN
               COMPLIANCE WITH RULE 144A UNDER THE SECURITIES ACT, (C) TO AN
               INSTITUTIONAL ACCREDITED INVESTOR THAT, PRIOR TO SUCH
               TRANSFER, FURNISHES TO STATE STREET BANK AND TRUST COMPANY,
               AS TRUSTEE, A SIGNED LETTER CONTAINING CERTAIN
               REPRESENTATIONS AND AGREEMENTS RELATING TO THE RESTRICTIONS
               ON TRANSFER OF THE NOTE EVIDENCED HEREBY (THE FORM OF WHICH
               LETTER CAN BE OBTAINED FROM SUCH TRUSTEE), (D) OUTSIDE THE
               UNITED STATES IN COMPLIANCE WITH RULE 904 UNDER THE
               SECURITIES ACT OR (E) PURSUANT TO THE EXEMPTION FROM
               REGISTRATION PROVIDED BY RULE 144 UNDER THE SECURITIES ACT
               (IF AVAILABLE); AND (3) AGREES THAT IT WILL DELIVER TO EACH
               PERSON TO WHOM THE NOTE EVIDENCED HEREBY IS TRANSFERRED A
               NOTICE SUBSTANTIALLY TO THE EFFECT OF THIS LEGEND.  IN
               CONNECTION WITH ANY TRANSFER OF THE NOTE EVIDENCED HEREBY
               BEFORE THE RESTRICTION TERMINATION DATE, THE HOLDER MUST
               CHECK THE APPROPRIATE BOX SET FORTH ON THE REVERSE HEREOF
               RELATING TO THE MANNER OF SUCH TRANSFER AND SUBMIT THIS
               CERTIFICATE TO STATE STREET BANK AND TRUST COMPANY, AS
               TRUSTEE.  IF THE PROPOSED TRANSFER IS PURSUANT TO CLAUSE (C),
               (D) OR (E) ABOVE, THE HOLDER MUST, PRIOR TO SUCH TRANSFER,
               FURNISH TO STATE STREET BANK AND TRUST COMPANY, AS TRUSTEE,
               SUCH CERTIFICATIONS, LEGAL OPINIONS OR OTHER INFORMATION AS
               THE COMPANY MAY REASONABLY REQUIRE TO CONFIRM THAT SUCH
               TRANSFER IS BEING MADE PURSUANT TO AN EXEMPTION FROM, OR IN A
               TRANSACTION NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS OF
               THE SECURITIES ACT.  THIS LEGEND WILL BE REMOVED UPON THE
               RESTRICTION TERMINATION DATE.  AS USED HEREIN, THE TERMS
               "OFFSHORE TRANSACTION, "UNITED STATES", "U.S. PERSON" HAVE
               THE MEANINGS GIVEN TO THEM BY REGULATION S UNDER THE
               SECURITIES ACT.

                    SOFTKEY INTERNATIONAL INC., a corporation duly organized
          and validly existing under the laws of the State of Delaware
          (herein) called the "Company"), which term includes any Successor
          Company under the Indenture referred to on the reverse hereof, 
          for value received hereby promises to pay to
          __________________________ or registered assigns, the principal
          sum of _________ Dollars on November 1, 2000, at the office or
          agency of the Company maintained for that purpose in the Borough
          of Manhattan, The City of New York, or, at the option of the
          holder of this Note, at the Corporate Trust Office of the Trustee,
          in such coin or currency of the United States of America as at the
          time of payment shall be legal tender for the payment of public
          and private debts, and to pay interest, semi-annually on May 1 and
          November 1 of each year, commencing May 1, 1996, on said principal
          sum at said office or agency, in like coin or currency, at the
          rate per annum specified in the title of this Note, from the May 1
          or November 1, as the case may be, next preceding the date of this
          Note to which interest has been paid or duly provided for, unless
          the date hereof is a date to which interest has been paid or duly
          provided for, in which case from the date of this Note, or unless
          no interest has been paid or duly provided for on the Notes, in
          which case from _____________, 1995, until payment of said
          principal sum has been made or duly provided for.  Notwithstanding
          the foregoing, if the date hereof is after any April 15 or October
          15, as the case may be, and before the following May 1 or November
          1 other than October 15, 1995, this Note shall bear interest from
          such May 1 or November 1, respectively; provided, however, that if
          the Company shall default in the payment of interest due on such
          May 1 or November 1, then this Note shall bear interest from the
          next preceding May 1 or November 1 to which interest has been paid
          or duly provided for or, if no interest has been paid or duly
          provided for on such Note, from ____________, 1995.  The interest
          so payable on any May 1 or November 1 will be paid to the person
          in whose name this Note (or one or more Predecessor Notes) is
          registered at the close of business on the record date, which
          shall be the April 15 or October 15 (whether or not a Business
          Day) next preceding such May 1 or November 1, respectively;
          provided that any such interest not punctually paid or duly
          provided for shall be payable as provided in the Indenture. 
          Interest may, at the option of the Company, be paid by check
          mailed to the registered address of such person. 

                    Reference is made to the further provisions of this Note
          set forth an the reverse hereof, including, without limitation,
          provisions giving the holder of this Note the right to convert
          this Note into Common Stock and to exchange this Note for
          Preferred Stock of the Company on the terms and subject to the
          limitations referred to on the reverse hereof and as more fully
          specified in the Indenture.  Such further provisions shall for all
          purposes have the same effect as though set forth at this place.

                    This Note shall be deemed to be a contract made under
          the laws of the State of New York, and for all purposes shall be
          construed in accordance with and governed by the laws of said
          State.

                    This Note shall not be valid or become obligatory for
          any purpose until the certificate of authentication hereon shall
          have been manually signed by the Trustee or a duly authorized
          authenticating agent under the Indenture.

                    IN WITNESS WHEREOF, the Company has caused this Note to
          be duly executed under its corporate seal.

                                        SOFTKEY INTERNATIONAL INC.

                                        By:                             
                                        Name:                           
                                        Title:                     

          Dated:              

          Attest:

          _____________________
          Secretary




                        [FORM OF CERTIFICATE OF AUTHENTICATION]

          CERTIFICATE OF AUTHENTICATION

                    This is one of the Notes described in the within-named
          Indenture.

                                             STATE STREET BANK AND TRUST
                                             COMPANY, as Trustee

                                             By:                          
                                                  Authorized officer
                                                  As Authenticating Agent
                                                  (if different from
                                                  Trustee)

          By:
          Authorized Officer

          [FORM OF REVERSE OF NOTE]

          SOFTKEY INTERNATIONAL INC.

          5 1/2% Senior Convertible/Exchangeable Note Due 2000

                    This Note is one of a duly authorized issue of Notes in
          the Company, designated as its 5 1/2% Senior Convertible/Ex-
          changeable Notes due 2000 (herein called the "Notes"), limited to
          the aggregate principal amount of $150,000,000 all issued or to be
          issued under and pursuant to an indenture dated as of
          _____________ (herein called the "Indenture"), between the Company
          and State Street Bank and Trust Company (herein called the
          "Trustee"), to which Indenture and all indentures supplemental
          thereto reference is hereby made for a description of the rights,
          limitations of rights, obligations, duties and immunities
          thereunder of the Trustee, the Company and the holders of the
          Notes.

                    In case an Event of Default, as defined in the
          Indenture, shall have occurred and be continuing, the principal of
          and accrued interest on all Notes may be declared, and upon said
          declaration shall become, due and payable, in the manner, with the
          effect and subject to the conditions provided in the Indenture.

                    The Indenture contains provisions permitting the Company
          and the Trustee, with the consent of the holders of not less than
          a majority in aggregate principal amount of the Notes at the time
          outstanding, evidenced as in the Indenture provided to execute
          supplemental indentures adding any provisions to or changing in
          any manner or eliminating any of the provisions of the Indenture
          or of any supplemental indenture or modifying in any manner the
          rights of the holders of the Notes; provided, however, that no
          such supplemental indenture shall (i) extend the fixed maturity of
          any Note, or reduce the rate or extend the time of payment of
          interest thereon, or reduce the principal amount thereof or
          premium, if any, thereon, or reduce any amount payable on
          redemption thereof, alter the obligation of the Company to redeem
          the Notes at the option of the holders upon the occurrence of a
          Change of Control or impair or affect the right of any Noteholder
          to institute suit for the payment thereof, or make the principal
          thereof or interest or premium, if any, thereon payable in any
          coin or currency other than that provided in the Notes or impair
          the right to exchange the Notes for Preferred Stock or to convert
          the Notes into Common Stock subject to the terms set forth in the
          Indenture, including Sections 15.6 and 17.6 thereof, without the
          consent of the holder of each Note so affected or (ii) reduce the
          aforesaid percentage of Notes, the holders of which are required
          to consent to any such supplemental indenture, without the consent
          of the holders of all Notes then outstanding.  It is also provided
          in the Indenture that, prior to any declaration accelerating the
          maturity of the Notes, the holders of a majority in aggregate
          principal amount of the Notes at the time outstanding may on
          behalf of the holders of all of the Notes waive any past default
          or Event of Default under the Indenture and its consequences
          except a default in the payment of interest or any premium on or
          the principal of any of the Notes, a failure by the Company to
          convert any Notes into Common Stock of the Company or to exchange
          any Notes for Preferred Stock of the Company or a default in
          respect of a covenant or provision of the Indenture which under
          Article XI thereof cannot be modified or amended without the
          consent of the holders of all Notes then outstanding.  Any such
          consent or waiver by the holder of this Note (unless revoked as
          provided in the Indenture) shall be conclusive and binding upon
          such holder and upon all future holders and owners of this Note
          and any Notes which may be issued in exchange or substitution
          hereof, irrespective of whether or not any notation thereof is
          made upon this Note or such other Notes.

                    No reference herein to the Indenture and no provision of
          this Note or of the Indenture shall alter or impair the obligation
          of the Company, which is absolute and unconditional, to pay the
          principal of and any premium and interest on this Note at the
          place, at the respective times, at the rate and in the coin or
          currency herein prescribed.

                    Interest on the Notes shall be computed on the basis of
          a year of twelve 30-day months.

                    The Notes are issuable in registered form without
          coupons in denominations of $1,000 principal amount and integral
          multiples thereof.  At the office or agency of the Company
          referred to on the face hereof, and in the manner and subject to
          the limitations provided in the Indenture, without payment of any
          service charge but with payment of a sum sufficient to cover any
          tax or other governmental charge that may be imposed in connection
          with any registration or exchange of Notes, Notes may be exchanged
          for a like aggregate principal amount of Notes of other authorized
          denominations.

                    The Notes will not be redeemable at the option of the
          Company prior to November 2, 1998.  On or after such date and
          prior to maturity the Notes may be redeemed at the option of the
          Company as a whole, or from time to time in part, upon mailing a
          notice of such redemption not less than 30 nor more than 60 days
          before the date fixed for redemption to the holders of Notes at
          their last registered addresses, all as provided in the Indenture,
          at the following optional redemption prices (expressed as
          percentages of the principal amount), together in each case with
          accrued interest to the date fixed for redemption.

          If redeemed during the 12-month period beginning:

                    Date                             Percentage
               November 2, 1998                        102.2%
               November 1, 1999                        101.1% 

          and 100% at November 1, 2000; provided that if the date fixed for
          redemption is a May 1 or November 1, then the interest payable on
          such date shall be paid to the holder of record on the next
          preceding April 15 or October 15, respectively.

                    If a Change of Control (as defined in the Indenture)
          shall occur at any time, then each holder of Notes shall have the
          right to require that the Company purchase such holder's Notes in
          whole or in part in integral multiples of $1,000, at a purchase
          price in cash in an amount equal to 101% of the principal amount
          of such Notes, plus accrued and unpaid interest, if any, on the
          repurchase date pursuant to an offer to be made by the Company and
          in accordance with the procedures set forth in the Indenture.

                    Subject to the provisions of the Indenture, the holder
          hereof has the right, at its option, at any time after 60 days
          following the latest date of original issuance of the Notes and
          prior to the close of business on November 1, 2000, or, as to all
          or any portion hereof called for redemption, prior to the close of
          business on the Business Day next preceding the date fixed for
          redemption (unless the Company shall default in payment due upon
          redemption thereof), to exchange the principal amount hereof or
          any portion of such principal which is $1,000 or an integral
          multiple thereof, into that number of fully paid and non-
          assessable shares of the Company's Preferred Stock obtained by
          dividing the principal amount of this Note, or portion thereof to
          be exchanged by the exchange price of $1000.00, or such exchange
          price as adjusted from time to time as provided in the Indenture,
          or to convert the principal hereof or any portion of such
          principal which is $1,000 or an integral multiple thereof, into
          that number of fully paid and non-assessable shares of Company's
          Common Stock, as said shares shall be constituted at the date of
          conversion, obtained by dividing the principal amount of this Note
          or portion thereof to be converted by the conversion price of
          $53.00 or such conversion price as adjusted from time to time as
          provided in the Indenture, in either case, upon surrender of this
          Note, together with any conversion or exchange notice, as the case
          may be, as provided in the Indenture, to the Company at the office
          or agency of the Company maintained for that purpose in the
          Borough of Manhattan, The City of New York, or at the option of
          such holder, the Corporate Trust Office of the Trustee, and,
          unless the shares issuable on conversion or exchange are to be
          issued in the same name as this Note, duly endorsed by, or
          accompanied by instruments of transfer in form satisfactory to the
          Company duly executed by, the holder or by his duly authorized
          attorney.  In the case of any exchange, dividends on the Preferred
          Stock issuable upon such exchange will commence to accrue as of
          the most recent date as of which interest has been paid, or duly
          provided for, on the Notes unless no interest has been paid or
          duly provided for on the Notes, in which case from ____________,
          1995 and no further adjustment will be made with regard to
          interest due on the Note, or portions thereof, so exchanged.  No
          adjustment in respect of interest or dividends will be made upon
          any conversion; provided, however, that if this Note shall be
          surrendered for conversion or exchange during the period from the
          close of business on any record date for the payment of interest
          through the close of business on the Business Day next preceding
          the following interest payment date, this Note (unless it or the
          portion being converted or exchanged shall have been called for
          redemption on a date in such period) must be accompanied by an
          amount, in funds acceptable to the Company, equal to the interest
          payable on such interest payment date on the principal amount
          being converted or exchanged.  No fractional shares will be issued
          upon any conversion or exchange, but an adjustment in cash will be
          made, as provided in the Indenture, in respect of any fraction of
          a share which would otherwise be issuable upon the surrender of
          any Note or Notes for conversion or exchange.

                    Any Notes called for redemption, unless surrendered for
          exchange or conversion on or before the close of business on the
          date fixed for redemption, may be deemed to be purchased from the
          holder of such Notes in an amount equal to the applicable
          redemption price, together with accrued interest to the date fixed
          for redemption, by one or more investment bankers or other
          purchasers who may agree with the Company to purchase such Notes
          from the holders thereof and convert them into Common Stock or
          exchange them for Preferred Stock of the Company and to make
          payment for such Notes as aforesaid to the Trustee in trust for
          such holders.

                    Upon due presentment for registration of transfer of
          this Note at the office or agency of the Company in the Borough of
          Manhattan, The City of New York, or at the option of the holder of
          this Note, at the Corporate Trust office of the Trustee, a new
          Note or Notes of authorized denominations for an equal aggregate
          principal amount will be issued to the transferee in exchange
          thereof, subject to the limitations provided in the Indenture,
          without charge except for any tax or other governmental charge
          imposed in connection therewith.

                    The Company, the Trustee, any authenticating agent, any
          paying agent, exchange or any conversion agent and any Note
          registrar may deem and treat the registered holder hereof as the
          absolute owner of this Note (whether or not this Note shall be
          overdue and notwithstanding any notation of ownership or other
          writing hereon made by anyone other than the Company or any Note
          registrar), for the purpose of receiving payment hereof, or on
          account hereof, for the exchange or conversion hereof and for all
          other purposes, and neither the Company nor the Trustee nor any
          other authenticating agent nor any paying agent nor any other
          exchange or conversion agent nor any Note registrar shall be
          affected by any notice to the contrary.  All payments made to or
          upon the order of such registered holder shall, to the extent of
          the sum or sums paid, satisfy and discharge liability for monies
          payable on this Note.

                    No recourse for the payment of the principal of or any
          premium or interest on this Note, or for any claim based hereon or
          otherwise in respect hereof, and no recourse under or upon any
          obligation, covenant or agreement of the Company in the Indenture
          or any indenture supplemental thereto or in any Note, or because
          of the creation of any indebtedness represented thereby, shall be
          had against any incorporator, stockholder, officer or director, as
          such, past, present or future, of the Company or of any Successor
          Company, either directly or through the Company or any Successor
          Company, whether by virtue of any constitution, statute or rule of
          law or by the enforcement of any assessment or penalty or
          otherwise, all such liability being, by the acceptance hereof and
          as part of the consideration for the issue hereof, expressly
          waived and released.

                    Terms used in this Note and defined in the Indenture are
          used herein as therein defined.

           
                                   ABBREVIATIONS

               The following abbreviations, when used in the inscription of the
          face of this Note, shall be construed as though they were written out
          in full according to applicable laws or regulations:

          TEN COM - as tenants in common     UNIF GIFT MIN ACT
          TEN ENT - as tenants by the        ____________________ Custodian
                    entireties                    (Cust)
          JT TEN  - as joint tenants with    ____________________ under
                    right of survivorship         (minor)
                    and not as tenants in
                    common
                                             Uniform Gifts to
                                             minors Act ___________________
                                                            (State)

          Additional abbreviations may also be used
          though not in the above list.

           
                              [FORM OF CONVERSION NOTICE]

                                   CONVERSION NOTICE

          TO:  SoftKey International Inc.

                    The undersigned registered owner of this Note hereby
          irrevocably exercises the option to convert this Note, or the
          portion hereof (which is $1,000 principal amount or an integral
          multiple thereof) below designated, into shares of Common Stock,
          par value $.01 per share, of the Company in accordance with the
          terms of the Indenture referred to in this Note, and directs that
          the shares issuable and deliverable upon such conversion, and any
          Notes representing any unconverted principal amount hereof, be
          issued and delivered to the registered holder hereof unless a
          different name has been indicated below.  If shares or any portion
          of this Note not converted are to be issued in the name of a
          person other than the undersigned, the undersigned will check the
          appropriate box below and pay all transfer taxes payable with
          respect thereto.  Any amount required to be paid to the
          undersigned on account of interest accompanies this Note.

          Dated: _______________________

                                        __________________________________

                                        __________________________________
                                        Signature(s)

          Signature(s) must be guaranteed by an eligible Guarantor
          Institution (banks, stock brokers, savings and loan associations
          and credit unions) with membership in an approved signature
          guarantee medallion program pursuant to Securities and Exchange
          Commission Rule 17Ad-15 if shares of Common Stock are to be
          issued, or Notes to be delivered, other than to and in the name of
          the registered holder.

          _____________________________________
          Signature Guarantee

          Fill in for registration of shares if to
          be issued, and Notes if to be delivered,
          other than to and in the name of the
          registered holder:

          _______________________________
          (Name)

          _______________________________
          (Street Address)

          _______________________________
          (City, State and Zip Code)

          Please print name and address

                                                  __________________________
                                                  Social Security or other
                                                  Taxpayer Identification
                                                  Number

                                                  Principal amount to be
                                                  converted (if less than
                                                  all) $___________________



                               [FORM OF EXCHANGE NOTICE]
                                    EXCHANGE NOTICE

          TO:  SoftKey International Inc.

               The undersigned registered owner of this Note hereby
          irrevocably exercises the option to exchange this Note, or the
          portion hereof (which is $1,000 principal amount or an integral
          multiple thereof) below designated, into shares of Preferred
          Stock, par value $.01 per share, of the Company in accordance with
          the terms of the Indenture referred to in this Note, and directs
          that the shares issuable and deliverable upon such exchange, and
          any Notes representing any unexchanged principal amount hereof, be
          issued and delivered to the registered holder hereof unless a
          different name has been indicated below.  If shares or any portion
          of this Note not exchanged are to be issued in the name of a
          person other than the undersigned, the undersigned will check the
          appropriate box below and pay all transfer taxes payable with
          respect thereto.  Any amount required to be paid to the
          undersigned on account of interest accompanies this Note.

          Dated: ___________

                                                       ____________________

                                                       ____________________
                                                       Signature(s)

          Signature(s) must be guaranteed by an eligible Guarantor
          institution (banks, stock brokers, savings and loan associations
          and credit unions) with membership in an approved signature
          guarantee medallion program pursuant to Securities and Exchange
          Commission Rule 17Ad-15 if shares of Preferred Stock are to be
          issued, or Notes to be delivered, other than to and in the name of
          the registered holder.

          _____________________________________
          Signature Guarantee


          Fill in for registration of shares if to
          be issued, and Notes if to be delivered,
          other than to and in the name of the
          registered holder:

          _______________________________
          (Name)

          _______________________________
          (Street Address)

          _______________________________
          (City, State and Zip Code)

          Please print name and address

                                                  __________________________
                                                  Social Security or other
                                                  Taxpayer Identification
                                                  Number

                                                  Principal amount to be
                                                  exchanged (if less than
                                                  all) $______________



                          [FORM OF OPTION TO ELECT REPAYMENT
                               UPON A CHANGE OF CONTROL]

          To:  SoftKey International Inc.

                    The undersigned registered owner of this Note hereby
          irrevocably acknowledges receipt of a notice from SoftKey
          International Inc. (the "Company") as to the occurrence of a
          Change of Control with respect to the Company and requests and
          instructs the Company to repay the entire principal amount of this
          Note, or the portion thereof (which is $1,000 principal amount or
          an integral multiple thereof) below designated, in accordance with
          the terms of the Indenture referred to in this Note, together with
          accrued interest to such date, to the registered holder hereof.

          Dated:________________                  ____________________

                                                  ____________________
                                                  Signature(s)

                                                  ____________________
                                                  Social Security or Other
                                                  Taxpayer Identification
                                                  Number

                                                  Principal amount to be
                                                  repaid (if less than all): 
                                                  $___________________




           (FORM OF ASSIGNMENT)

                    For value received _________________________ hereby
          sell(s), assign(s) and transfer(s) unto ___________________
          (Please insert social security or other identifying number of
          assignee) the within Note, and hereby irrevocably constitutes and
          appoints ____________________ attorney to transfer the said Note
          on the books of the Company, with full power of substitution in
          the premises.

                    In connection with any transfer of the within Note (or
          any issuance of shares of Common Stock, par value $.Ol per share,
          or shares of Preferred Stock, par value $.01 per share, of SoftKey
          International Inc. upon conversion or exchange of the within Note)
          occurring prior to the third anniversary of the date of original
          issuance of such Note, the undersigned confirms that such Note (or
          shares of Common Stock or Preferred Stock, as the case may be) are
          being transferred:

          ( )  To SoftKey International Inc. or a subsidiary thereof; or

          ( )  Pursuant to and in compliance with Rule 144A under the
               Securities Act of 1933, as amended; or

          ( )  To an institutional Accredited investor pursuant to and in
               compliance with the Securities Act of 1933, as amended; or

          ( )  Pursuant to and in compliance with Regulation S under the
               Securities Act of 1933, as amended; or

          ( )  Pursuant to and in compliance with Rule 144 under the
               Securities Act of 1933, as amended.

                    Unless one of the boxes above is checked, the Trustee
          will refuse to register any of the within Notes (or such shares of
          Common Stock or Preferred Stock, as the case may be) in the name
          of any person other than the registered holder thereof (or
          hereof); provided, however, that the Trustee may, in its sole
          discretion, register the transfer of such Notes (or such shares of
          Common Stock or Preferred Stock, as the case may be) if it has
          received such certifications, legal opinions and/or other
          information as the Company has reasonably requested to confirm
          that such transfer is being made pursuant to an exemption from, or
          in a transaction not subject to, the registration requirements of
          the Securities Act of 1933, as amended.

                    In addition, if the transferee is an institutional
          accredited investor or a purchaser who is not a U.S. person, the
          holder must furnish to the Trustee (i) in the case of an
          institutional accredited investor, a signed letter containing
          certain representations and agreements relating to the
          restrictions on transfer of the security evidenced hereby and (ii)
          such other certifications, legal opinions or other information as
          it may reasonably require to confirm that such transfer is being
          made pursuant to an exemption from, or in a transaction not
          subject to, the registration requirements of the Securities Act of
          1933, as amended.



          Dated: ________________

          _______________________

          _______________________
          Signature(s)

          Signature(s) must be
          guaranteed by an eligible
          Guarantor institution (banks,
          stock brokers, savings and
          loan associations and credit
          unions) with membership in an
          approved signature guarantee
          medallion program pursuant to
          Securities and Exchange
          Commission Rule 17Ad-15.

          _______________________
          Signature Guarantee

          NOTICE:  The signature on the conversion notice or the exchange
          notice, the option to elect payment upon a Change of Control or
          the assignment must  correspond with the name as written upon the
          face of the Note in every particular without alteration or
          enlargement or any change whatever.



                            EXHIBIT B - FORM OF GLOBAL NOTE

          [FORM OF FACE OF NOTE]

          No. A-1                                    $____________________  
                                                     CUSIP_______________  

          SOFTKEY INTERNATIONAL INC.

                    5 1/2% Senior Convertible/Exchangeable Note Due 2000

               UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR
               NOTES IN DEFINITIVE FORM, THIS NOTE MAY NOT BE TRANSFERRED
               EXCEPT AS A WHOLE BY THE DEPOSITARY TO A NOMINEE OF THE
               DEPOSITARY OR BY A NOMINEE OF THE DEPOSITARY TO THE
               DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY OR BY THE
               DEPOSITARY OR ANY SUCH NOMINEE TO A SUCCESSOR DEPOSITARY OR A
               NOMINEE OF SUCH SUCCESSOR DEPOSITARY.  UNLESS THIS
               CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF
               THE DEPOSITARY TRUST COMPANY, A NEW YORK CORPORATION ("DTC"),
               TO THE ISSUER OR ITS AGENT FOR REGISTRATION OF TRANSFER,
               EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED
               IN THE NAME OF CEDE & CO.  OR SUCH OTHER NAME AS REQUESTED BY
               AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE
               TO CEDE & CO.  OR SUCH OTHER ENTITY AS IS REQUESTED BY AN
               AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR
               OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON
               IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE &
               CO., HAS AN INTEREST HEREIN.

               THE NOTE EVIDENCED HEREBY HAS NOT BEEN REGISTERED UNDER THE
               SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), OR
               ANY STATE SECURITIES LAWS, AND MAY NOT BE OFFERED OR SOLD
               WITHIN THE UNITED STATES OR TO, OR FOR THE ACCOUNT OR BENEFIT
               OF, U.S. PERSONS EXCEPT AS SET FORTH IN THE FOLLOWING
               SENTENCE.  BY ACQUISITION HEREOF, THE HOLDER (1) REPRESENTS
               THAT (A) IT IS A "QUALIFIED INSTITUTIONAL BUYER" (AS DEFINED
               IN RULE 144A UNDER THE SECURITIES ACT) OR (B) IT IS AN
               INSTITUTIONAL "ACCREDITED INVESTOR" (AS DEFINED IN RULE
               501(A)(1), (2), (3) OR (7) UNDER THE SECURITIES ACT)
               ("INSTITUTIONAL ACCREDITED INVESTOR") OR (C) IT IS NOT A U.S.
               PERSON AND IS ACQUIRING THE NOTE EVIDENCED HEREBY IN AN
               OFFSHORE TRANSACTION; (2) AGREES THAT IT WILL NOT PRIOR TO
               THE DATE THAT IS THREE YEARS AFTER THE LATER OF THE ORIGINAL
               ISSUANCE OF THE NOTE EVIDENCED HEREBY AND THE LAST DATE ON
               WHICH SOFTKEY INTERNATIONAL INC. (THE "COMPANY") OR ANY
               "AFFILIATE" (AS DEFINED IN RULE 144 UNDER THE SECURITIES ACT)
               OF THE COMPANY WAS THE OWNER OF THE NOTE (THE "RESTRICTION
               TERMINATION DATE") RESELL OR OTHERWISE TRANSFER THE NOTE
               EVIDENCED HEREBY OR THE COMMON STOCK ISSUABLE UPON CONVERSION
               OR EXCHANGE OF SUCH NOTE EXCEPT (A) TO THE COMPANY OR ANY
               SUBSIDIARY THEREOF, (B) TO A QUALIFIED INSTITUTIONAL BUYER IN
               COMPLIANCE WITH RULE 144A UNDER THE SECURITIES ACT, (C) TO AN
               INSTITUTIONAL ACCREDITED INVESTOR THAT, PRIOR TO SUCH
               TRANSFER, FURNISHES TO STATE STREET BANK AND TRUST COMPANY,
               AS TRUSTEE, A SIGNED LETTER CONTAINING CERTAIN
               REPRESENTATIONS AND AGREEMENTS RELATING TO THE RESTRICTIONS
               ON TRANSFER OF THE NOTE EVIDENCED HEREBY (THE FORM OF WHICH
               LETTER CAN BE OBTAINED FROM SUCH TRUSTEE), (D) OUTSIDE THE
               UNITED STATES IN COMPLIANCE WITH RULE 904 UNDER THE
               SECURITIES ACT OR (E) PURSUANT TO THE EXEMPTION FROM
               REGISTRATION PROVIDED BY RULE 144 UNDER THE SECURITIES ACT
               (IF AVAILABLE); AND (3) AGREES THAT IT WILL DELIVER TO EACH
               PERSON TO WHOM THE NOTE EVIDENCED HEREBY IS TRANSFERRED A
               NOTICE SUBSTANTIALLY TO THE EFFECT OF THIS LEGEND.  IN
               CONNECTION WITH ANY TRANSFER OF THE NOTE EVIDENCED HEREBY
               BEFORE THE RESTRICTION TERMINATION DATE, THE HOLDER MUST
               CHECK THE APPROPRIATE BOX SET FORTH ON THE REVERSE HEREOF
               RELATING TO THE MANNER OF SUCH TRANSFER AND SUBMIT THIS
               CERTIFICATE TO STATE STREET BANK AND TRUST COMPANY, AS
               TRUSTEE.  IF THE PROPOSED TRANSFER IS PURSUANT TO CLAUSE (C),
               (D) OR (E) ABOVE, THE HOLDER MUST PRIOR TO SUCH TRANSFER,
               FURNISH TO STATE STREET BANK AND TRUST COMPANY, AS TRUSTEE,
               SUCH CERTIFICATIONS, LEGAL OPINIONS OR OTHER INFORMATION AS
               THE COMPANY MAY REASONABLY REQUIRE TO CONFIRM THAT SUCH
               TRANSFER IS BEING MADE PURSUANT TO AN EXEMPTION FROM, OR IN A
               TRANSACTION NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS OF
               THE SECURITIES ACT.  THIS LEGEND WILL BE REMOVED UPON THE
               RESTRICTION TERMINATION DATE.  AS USED HEREIN, THE TERMS
               "OFFSHORE TRANSACTION "UNITED STATES" AND "U.S. PERSON" HAVE
               THE MEANINGS GIVEN TO THEM BY REGULATION S UNDER THE
               SECURITIES ACT.

                    SOFTKEY INTERNATIONAL INC., a corporation duly organized
          and validly existing under the laws of the State of Delaware
          (herein called the "Company"), which term includes any Successor
          Company under the Indenture referred to on the reverse hereof, for
          value received hereby promises to pay to _________________________
          ____________________________________________________________
          ____________________________________________________________, or
          registered assigns, the principal sum of __________________
          ___________________________________________________________
          Dollars (subject to adjustment as set forth in the next paragraph
          hereof) on November 1, 2000, at the office or agency of the
          Company maintained for that purpose in the Borough of Manhattan,
          The City of New York, or, at the option of the holder of this
          Note, at the Corporate Trust office of the Trustee, in such coin
          or currency of the United States of America as at the time of
          payment shall be legal tender for the payment of public and
          private debts, and to pay interest, semi-annually on May 1 and
          November 1 of each year, commencing May 1, 1996, on said principal
          sum at said office or agency, in like coin or currency, at the
          rate per annum specified in the title of this Note, from the May 1
          or November 1, as the case may be, next preceding the date of this
          Note to which interest has been paid or duly provided for, unless
          the date hereof is a date to which interest has been paid or duly
          provided for, in which case from the date of this Note, or unless
          no interest has been paid or duly provided for on the Notes, in
          which case from ___________, 1995, until payment of said principal
          sum has been made or duly provided for.  Notwithstanding the
          foregoing, if the date hereof is after any April 15 or October 15,
          as the case may be, and before the following May 1 or November 1
          other than October 15, 1995, this Note shall bear interest from
          such May 1 or November 1, respectively; provided, however, that if
          the Company shall default in the payment of interest due on such
          May 1 or November 1, then this Note shall bear interest from the
          next preceding May 1 or November 1 to which interest has been paid
          or duly provided for or, if no interest has been paid or duly
          provided for on such Note, from __________, 1995.  The interest so
          payable on any May 1 or November 1 will be paid to the person in
          whose name this Note (or one or more Predecessor Notes) is
          registered at the close of business on the record date, which
          shall be the April 15 or October 15 (whether or not a Business
          Day) next preceding such May 1 or November 1, respectively;
          provided that any such interest not punctually paid or duly
          provided for shall be payable as provided in the Indenture. 
          Interest may, at the option of the Company, be paid by check
          mailed to the registered address of such person.

               The aggregate principal amount of the Note in global form
          represented hereby may from time to time be reduced or increased
          to reflect exchanges of a part of this Note in global form for
          definitive Notes or exchanges of definitive Notes for a part of
          this Note in global form or exchanges or conversions or
          redemptions of a part of this Note in global form or cancellations
          of a part of this Note in global form or transfers of definitive
          Notes in return for a part of this Note in global form or
          transfers of a part of this Note in global form effected by
          delivery of definitive Notes, in each case, and in any such case,
          by means of notations on the Schedule of Exchanges, Conversions,
          Redemptions, Cancellations and Transfers on the last page hereof. 
          Notwithstanding any provision of this Note to the contrary, (i)
          exchanges of a part of this Note in global form for definitive
          Notes, (ii) exchanges of definitive Notes for a part of this Note
          in global form, (iii) conversions, exchanges or redemptions of a
          part of this Note in global form, (iv) cancellations of a part of
          this Note in global form, (v) transfers of definitive Notes in
          return for a part of this Note in global form and (vi) transfers
          of a part of this Note in global form effected by delivery of
          definitive Notes may be effected without the surrendering of this
          Note in global form, provided that appropriate notations on the
          Schedule of Exchanges, Conversions, Redemptions, Cancellations and
          Transfers are made by the Trustee, or the Custodian at the
          direction of the Trustee, to reflect the appropriate reduction or
          increase, as the case may be, in the aggregate principal amount of
          this Note in global form resulting therefrom or as a consequence
          thereof.

               Reference is made to the further provisions of this Note set
          forth on the reverse hereof, including, without limitation,
          provisions giving the holder of this Note the right to convert
          this Note into Common Stock and exchange this Note for Preferred
          Stock of the Company on the terms and subject to the limitations
          referred to on the reverse hereof and as more fully specified in
          the Indenture.  Such further provisions shall for all purposes
          have the same effect as though fully set forth at this place.

               This Note shall be deemed to be a contract made under the
          laws of the State of New York, and for all purposes shall be
          construed in accordance with and governed by the laws of said
          State.

               This Note shall not be valid or become obligatory for any
          purpose until the certificate of authentication hereon shall have
          been manually signed by the Trustee or a duly authorized
          authenticating agent under the Indenture.

               IN WITNESS WHEREOF, the Company has caused this Note to be
          duly executed under its corporate seal.


                                        SOFTKEY INTERNATIONAL INC.

                                        By:________________________________
                                           Name:
                                           Title:

          Dated: _______________________

          Attest:

          ______________________________
                    Secretary




          [FORM OF CERTIFICATE AUTHENTICATION]

          CERTIFICATE OF AUTHENTICATION

               This is one of the Notes Described in the within-named
          Indenture.

                                           STATE STREET BANK AND TRUST      
                                             COMPANY, as Trustee            

                                           By: _____________________________
                                               Authorized Officer           
                                               As Authenticating Agent      
                                               (if different from Trustee)  

                                           By: _____________________________
                                               Authorized Officer           



          [FORM OF REVERSE OF NOTE]

          SoftKey International Inc.

          5 1/2% Senior Convertible/Exchangeable Note Due 2000

               This Note is one of a duly authorized issue of Notes of the
          Company, designated as its 5 1/2% Senior Convertible/Exchangeable
          Notes due 2000 (herein called the "Notes"), limited to the
          aggregate principal amount of $150,000,000 all issued or to be
          issued under and pursuant to an Indenture dated as of __________,
          1995 (herein called the "Indenture"), between the Company and
          State Street Bank and Trust Company (herein called the "Trustee"),
          to which Indenture and all indentures supplemental thereto
          reference is hereby made for a description of the rights,
          limitations to rights, obligations, duties and immunities
          thereunder of the Trustee, the Company and the holders of the
          Notes.

               In case an Event of Default, as defined in the Indenture,
          shall have occurred and be continuing, the principal of and
          accrued interest on all Notes may be declared, and upon said
          declaration shall become, due and payable, in the manner, with the
          effect and subject to the conditions provided in the Indenture.

               The Indenture contains provisions permitting the Company and
          the Trustee, with the consent of the holders of not less than a
          majority in aggregate principal amount of the Notes at the time
          outstanding, evidenced as in the Indenture provided, to execute
          supplemental indentures adding any provisions to or changing in
          any manner or eliminating any of the provisions of the Indenture
          or of any supplemental indenture or modifying in any manner the
          rights of the holders of the Notes; provided, however, that no
          such supplemental indenture shall (i) extend the fixed maturity of
          any Note, or reduce the rate or extend the time of payment of
          interest thereon, or reduce the principal amount thereof or
          premium, if any, thereon, or reduce any amount payable on
          redemption thereof, alter the obligation of the Company to redeem
          the Notes at the option of the holders upon the occurrence of a
          Change of Control or impair or affect the right of any Noteholder
          to institute suit for the payment thereof, or make the principal
          thereof or interest or premium, if any, thereon payable in any
          coin or currency other than that provided in the Notes or impair
          the right to exchange the Notes for Preferred Stock or to convert
          the Notes into Common Stock subject to the terms set forth in the
          Indenture, including Sections 15.6 and 17.6 thereof, without the
          consent of the holder of each Note so affected or (ii) reduce the
          aforesaid percentage of Notes, the holders of which are required
          to consent to any such supplemental indenture, without the consent
          of the holders of all Notes then outstanding.  It is also provided
          in the Indenture that, prior to any declaration accelerating the
          maturity of the Notes, the holders of a majority in aggregate
          principal amount of the Notes at the time outstanding may on
          behalf of the holders of all of the Notes waive any past default
          or Event of Default under the Indenture and its consequences
          except a default in the payment of interest or any premium on or
          the principal of any of the Notes, a failure by the Company to
          exchange the Notes for Preferred Stock or to convert any Notes
          into Common Stock of the Company or a default in respect of a
          covenant or provision of the Indenture which under Article XI
          thereof cannot be modified or amended without the consent of the
          holders of all Notes then outstanding.  Any such consent or waiver
          by the holder of this Note (unless revoked as provided in the
          Indenture) shall be conclusive and binding upon such holder and
          upon all future holders and owners of this Note and any Notes
          which may be issued in exchange or substitution hereof,
          irrespective of whether or not any notation thereof is made upon
          this Note or such other Notes.

               No reference herein to the Indenture and no provision of this
          Note or of the Indenture shall alter or impair the obligation of
          the Company, which is absolute and unconditional, to pay the
          principal of and any premium and interest on this Note at the
          place, at the respective times, at the rate and in the coin or
          currency herein prescribed.

               Interest on the Notes shall be computed on the basis of a
          year of twelve 30-day months.

               The Notes are issuable in registered form without coupons in
          denominations of $1,000 principal amount and integral multiples
          thereof.  At the office or agency of the Company referred to on
          the face hereof, and in the manner and subject to the limitations
          provided in the Indenture, without payment of any service charge
          but with payment of a sum sufficient to cover any tax or other
          governmental charge that may be imposed in connection with any
          registration or exchange of Notes, Notes may be exchanged for a
          like aggregate principal amount of Notes of other authorized
          denominations.

               The Notes will not be redeemable at the option of the Company
          prior to November 2, 1998.  On or after such date and prior to
          maturity the Notes may be redeemed at the option of the Company as
          a whole, or from time to time in part, upon mailing a notice of
          such redemption not less than 30 nor more than 60 days before the
          date fixed for redemption to the holders of Notes at their last
          registered addresses, all as provided in the Indenture, at the
          following optional redemption prices (expressed as percentages of
          the principal amount), together in each case with accrued interest
          to the date fixed for redemption.

          If redeemed during the 12-month period beginning:

                    Date                          Percentage

                    November 2, 1998                102.2%
                    November 1, 1999                101.1%

          and 100% at November 1, 2000; provided that if the date fixed for
          redemption is a May 1 or November 1, then the interest payable on
          such date shall be paid to the holder of record on the next
          preceding April 15 or October 15, respectively.

                    If a Change of Control (as defined in the Indenture)
          shall occur at any time, then each holder of Notes shall have the
          right to require that the Company purchase such holder's Notes in
          whole or in part in integral multiples of $1,000, at a purchase
          price in cash in an amount equal to 101% of the principal amount
          of such Notes, plus accrued and unpaid interest, if any, to the
          repurchase date pursuant to an offer to be made by the Company and
          in accordance with the procedures set forth in the Indenture.

                    Subject to the provisions of the Indenture, the holder
          hereof has the right, at its option, at any time after 60 days
          following the latest date of original issuance of the Notes and
          prior to the close of business on November 1, 2000, or, as to all
          or any portion hereof called for redemption, prior to the close of
          business on the Business Day next preceding the date fixed for
          redemption (unless the Company shall default in payment due upon
          redemption thereof), exchange the principal amount hereof or any
          portion of such principal which is $1,000 or an integral multiple
          thereof, into that number of fully paid and non-assessable shares
          of the Company's Preferred Stock obtained by dividing the
          principal amount of this Note, or portion thereof to be exchanged,
          by the exchange price of $1000.00 or such exchange price as
          adjusted from time to time as provided in the Indenture, or to
          convert the principal hereof or any portion of such principal
          which is $1,000 or an integral multiple thereof, into that number
          of fully paid and non-assessable shares of Company's Common Stock,
          as said shares shall be constituted at the date of conversion,
          obtained by dividing the principal amount of this Note or portion
          thereof to be converted by the conversion price of $53.00 or such
          conversion price as adjusted from time to time as provided in the
          Indenture, in either case, upon surrender of this Note, together
          with an exchange notice or a conversion notice, as the case may
          be, as provided in the Indenture, to the Company at the office or
          agency of the Company maintained for that purpose in the Borough
          of Manhattan, The City of New York, or at the option of such
          holder, the Corporate Trust Office of the Trustee, and, unless the
          shares issuable on conversion or exchange are to be issued in the
          same name as this Note, duly endorsed by, or accompanied by
          instruments of transfer in form satisfactory to the Company duly
          executed by the holder or by his duly authorized attorney.  In the
          case of any exchange, dividends on the Preferred Stock issuable
          upon such exchange will commence to accrue as of the most recent
          date as of which interest has been paid, or duly provided for, on
          the Notes unless no interest has been paid or duly provided for on
          the Notes, in which case from ____________, 1995 and no further
          adjustment will be made with regard to interest due on the Note,
          or portions thereof, so exchanged.  No adjustment in respect of
          interest or dividends will be made upon any conversion; provided,
          however, that if this Note shall be surrendered for conversion or
          exchange during the period from the close of business on any
          record date for the payment of interest through the close of
          business on the Business Day next preceding the following interest
          payment date, this Note (unless it or the portion being converted
          or exchanged shall have been called for redemption on a date in
          such period) must be accompanied by an amount, in funds acceptable
          to the Company, equal to the interest payable on such interest
          payment date on the principal amount being converted or exchanged. 
          No fractional shares will be issued upon any conversion or
          exchange, but an adjustment in cash will be made, as provided in
          the Indenture, in respect of any fraction of a share which would
          otherwise be issuable upon the surrender of any Note or Notes for
          conversion or exchange.

               Any Notes called for redemption, unless surrendered for
          conversion or exchange on or before the close of business on the
          date fixed for redemption, may be deemed to be purchased from the
          holder of such Notes at an amount equal to the applicable
          redemption price, together with accrued interest to the date fixed
          for redemption, by one or more investment bankers or other
          purchasers who may agree with the Company to purchase such Notes
          from the holders thereof and convert them into Common Stock or
          exchange them for Preferred Stock of the Company and to make
          payment for such Notes as aforesaid to the Trustee in trust for
          such holders.

               Upon due presentment for registration of transfer of this
          Note at the office or agency of the Company in the Borough of
          Manhattan, The City of New York, or at the option of the holder of
          this Note, at the Corporate Trust office of the Trustee, a new
          Note or Notes of authorized denominations for an equal aggregate
          principal amount will be issued to the transferee in exchange
          thereof, subject to the limitations provided in the Indenture,
          without charge except for any tax or other governmental charge
          imposed in connection therewith.

               The Company, the Trustee, any authenticating agent, any
          paying agent, any exchange or conversion agent and any Note
          registrar may deem and treat the registered holder hereof as the
          absolute owner of this Note (whether or not this Note shall be
          overdue and notwithstanding any notation of ownership or other
          writing hereon made by anyone other than the Company or any Note
          registrar), for the purpose of receiving payment hereof, or on
          account hereof, for the exchange or conversion hereof and for all
          other purposes, and neither the Company nor the Trustee nor any
          other authenticating agent nor any paying agent nor any other
          exchange or conversion agent nor any Note registrar shall be
          affected by any notice to the contrary.  All payments made to or
          upon the order of such registered holder shall, to the extent of
          the sum or sums paid, satisfy and discharge liability for monies
          payable on this Note.

               No recourse for the payment of the principal of or any
          premium or interest on this Note, or for any claim based hereon or
          otherwise in respect hereof, and no recourse under or upon any
          obligation, covenant or agreement of the Company in the Indenture
          or any indenture supplemental thereto or in any Note, or because
          of the creation of any indebtedness represented thereby, shall be
          had against any incorporator, stockholder, officer or director, as
          such, past, present or future, of the Company or of any Successor
          Company, either directly or through the Company or any Successor
          Company, whether by virtue of any constitution, statute or rule of
          law or by the enforcement of any assessment or penalty or
          otherwise, all such liability being, by the acceptance hereof and
          as part of the consideration for the issue hereof, expressly
          waived and released.

               Terms used in this Note and defined in the Indenture are used
          herein as therein defined.



           
                              [FORM OF CONVERSION NOTICE]

                                   CONVERSION NOTICE

          TO:  SoftKey International Inc.

                    The undersigned registered owner of this Note hereby
          irrevocably exercises the option to convert this Note, or the
          portion hereof (which is $1,000 principal amount or an integral
          multiple thereof) below designated, into shares of Common Stock,
          par value $.01 per share, of the Company in accordance with the
          terms of the Indenture referred to in this Note, and directs that
          the shares issuable and deliverable upon such conversion, and any
          Notes representing any unconverted principal amount hereof, be
          issued and delivered to the registered holder hereof unless a
          different name has been indicated below.  If shares or any portion
          of this Note not converted are to be issued in the name of a
          person other than the undersigned, the undersigned will check the
          appropriate box below and pay all transfer taxes payable with
          respect thereto.  Any amount required to be paid to the
          undersigned on account of interest accompanies this Note.

          Dated: _______________________

                                        __________________________________

                                        __________________________________
                                        Signature(s)

          Signature(s) must be guaranteed by an eligible Guarantor
          Institution (banks, stock brokers, savings and loan associations
          and credit unions) with membership in an approved signature
          guarantee medallion program pursuant to Securities and Exchange
          Commission Rule 17Ad-15 if shares of Common Stock are to be
          issued, or Notes to be delivered, other than to and in the name of
          the registered holder.

          _____________________________________
          Signature Guarantee


          Fill in for registration of shares if to
          be issued, and Notes if to be delivered,
          other than to and in the name of the
          registered holder:

          _______________________________
          (Name)

          _______________________________
          (Street Address)

          _______________________________
          (City, State and Zip Code)

          Please print name and address

                                                  __________________________
                                                  Social Security or other
                                                  Taxpayer Identification
                                                  Number

                                                  Principal amount to be
                                                  converted (if less than
                                                  all) $___________________


          [FORM OF EXCHANGE NOTICE)

          EXCHANGE NOTICE

               To:   SoftKey International Inc.

                    The undersigned registered owner of this Note hereby
          irrevocably exercises the option to exchange this Note, or the
          portion hereof (which is $1,000 principal amount or an integral
          multiple thereof) below designated, into shares of Preferred
          Stock, par value $.01 per share, of the Company in accordance with
          the terms of the Indenture referred to in this Note, and directs
          that the shares issuable and deliverable upon such exchange, and
          any Notes representing any unconverted principal amount hereof, be
          issued and delivered to the registered holder hereof unless a
          different name has been indicated below.  If shares or any portion
          of this Note not exchanged are to be issued in the name of a
          person other than the undersigned, the undersigned will check the
          appropriate box below and pay all transfer taxes payable with
          respect thereto.  Any amount required to be paid to the
          undersigned on account of interest accompanies this Note.

          Dated:                           

                                           

          _________________________________
          Signature(s)

          Signature(s) must be guaranteed by an eligible Guarantor
          institution (banks, stock brokers, savings and loan associations
          and credit unions) with membership in an approved signature
          guarantee medallion program pursuant to Securities and Exchange
          Commission Rule 17Ad-15 if shares of Common Stock are to be
          issued, or Notes to be delivered, other than to and in the name of
          the registered holder.

          ________________________________
          Signature Guarantee


          Fill in for registration of shares if to
          be issued, and Notes if to be delivered,
          other than to and in the name of the
          registered holder:

          _______________________________
          (Name)

          _______________________________
          (Street Address)

          _______________________________
          (City, State and Zip Code)

          Please print name and address

                                                  __________________________
                                                  Social Security or other
                                                  Taxpayer Identification
                                                  Number

                                                  Principal amount to be
                                                  exchanged (if less than
                                                  all) $___________________



          [FORM OF OPTION TO ELECT REPAYMENT]
          UPON A CHANGE OF CONTROL)

     To:  SoftKey International Inc.

               The undersigned registered owner of this Note hereby
          irrevocably acknowledges receipt of a notice from SoftKey
          International Inc. (the "Company") as to the occurrence of a
          Change of Control with respect to the Company and requests and
          instructs the Company to repay the entire principal amount of this
          Note, or the portion thereof (which is $1,000 principal amount or
          an integral multiple thereof) below designated, in accordance with
          the terms of the Indenture referred to in this Note, together with
          accrued interest to such date, to the registered holder hereof.

          Dated:________________________

                                        ___________________________________

                                        ___________________________________
                                        Signature(s)

                                        ___________________________________
                                        Social Security or Other Taxpayer
                                        Identification Number

                                        ___________________________________
                                        Principal amount to be repaid (if
                                        less than all): $__________________



                                       EXHIBIT C

                                       [FORM OF
                              CERTIFICATE OF DESIGNATION]




                                                                           

                              SOFTKEY INTERNATIONAL INC.

                                         AND

                             STATE STREET BANK AND TRUST COMPANY

                                        TRUSTEE

                                        INDENTURE

                              DATED AS OF _____________, 1995

                    5 1/2% SENIOR CONVERTIBLE/EXCHANGEABLE NOTES DUE 2000


                                                                           


                                   TABLE OF CONTENTS

          ARTICLE I - DEFINITIONS . . . . . . . . . . . . . . . . . . . .  2

               Section 1.1  Definitions . . . . . . . . . . . . . . . . .  2

          ARTICLE II - ISSUE, DESCRIPTION, EXECUTION, REGISTRATIONAND
               EXCHANGE OF NOTES  . . . . . . . . . . . . . . . . . . . .  7

               Section 2.1 Designation, Amount and Issue of Notes . . . .  7
               Section 2.2 Form of Notes  . . . . . . . . . . . . . . . .  8
               Section 2.3  Date and Denomination of Notes; 
                    Payments of Interest  . . . . . . . . . . . . . . . .  8
               Section 2.4  Execution of Notes  . . . . . . . . . . . . . 10
               Section 2.5  Exchange and Registration of Transfer 
                    of Notes; Restrictions on Transfer; Depositary  . . . 11
               Section 2.6   Mutilated, Destroyed, Lost or Stolen 
                    Notes . . . . . . . . . . . . . . . . . . . . . . . . 19
               Section 2.7  Temporary Notes . . . . . . . . . . . . . . . 20
               Section 2.8  Cancellation of Notes Paid, Etc . . . . . . . 20
               Section 2.9  Ranking . . . . . . . . . . . . . . . . . . . 21

          ARTICLE III - REDEMPTION OF NOTES . . . . . . . . . . . . . . . 21

               Section 3.1  Redemption Prices . . . . . . . . . . . . . . 21
               Section 3.2  Notice of Redemption, Selection of Notes  . . 21
               Section 3.3  Payment of Notes Called for Redemption  . . . 23
               Section 3.4  Conversion/Exchange Arrangement on 
                    Call for Redemption . . . . . . . . . . . . . . . . . 24
               Section 3.5  Purchase of Notes Upon a Change of Control  . 25

          ARTICLE IV - [RESERVED] . . . . . . . . . . . . . . . . . . . . 26

          ARTICLE V - PARTICULAR COVENANTS OF THE COMPANY . . . . . . . . 26

               Section 5.1  Payment of Principal, Premium and Interest  . 26
               Section 5.2  Maintenance of Office or Agency . . . . . . . 26
               Section 5.3  Appointments to Fill Vacancies in 
                    Trustee's office  . . . . . . . . . . . . . . . . . . 27
               Section 5.4  Provisions as to Paying Agent . . . . . . . . 27
               Section 5.5  Corporate Existence . . . . . . . . . . . . . 28
               Section 5.6  Rule 144A Information Requirement . . . . . . 28
               Section 5.7  Stay, Extension and Usury Laws  . . . . . . . 29
               Section 5.8  Amendments to Series C Preferred Stock  . . . 29

          ARTICLE VI - NOTEHOLDERS' LISTS AND REPORTS BY THE COMPANY  . . 29

               Section 6.1  Noteholders' Lists  . . . . . . . . . . . . . 29
               Section 6.2  Reports by Company  . . . . . . . . . . . . . 29

          ARTICLE VII - DEFAULTS AND REMEDIES . . . . . . . . . . . . . . 30

               Section 7.1  Events of Default . . . . . . . . . . . . . . 30
               Section 7.2  Payments of Notes on Default; Suit 
                    Therefor  . . . . . . . . . . . . . . . . . . . . . . 32
               Section 7.3  Application of Monies Collected by Trustee  . 34
               Section 7.4  Proceedings by Noteholder . . . . . . . . . . 35
               Section 7.5  Proceedings by Trustee  . . . . . . . . . . . 36
               Section 7.6  Remedies Cumulative and Continuing  . . . . . 36
               Section 7.7  Direction of Proceedings and Waiver 
                    of Defaults by Majority of Noteholders  . . . . . . . 37
               Section 7.8  Notice of Defaults  . . . . . . . . . . . . . 37
               Section 7.9  Undertaking to Pay Costs  . . . . . . . . . . 37

          ARTICLE VIII - CONCERNING THE TRUSTEE . . . . . . . . . . . . . 38

               Section 8.1  Duties and Responsibilities of Trustee  . . . 38
               Section 8.2  Reliance on Documents, Opinions, Etc  . . . . 39
               Section 8.3  No Responsibility for Recitals, Etc . . . . . 40
               Section 8.4  Trustee, Paying Agents, Exchange Agents,
                    Conversion Agents or Registrar May own Notes  . . . . 40
               Section 8.5  Monies to Be Held in Trust  . . . . . . . . . 41
               Section 8.6  Compensation and Expenses of Trustee  . . . . 41
               Section 8.7  Officers' Certificate as Evidence . . . . . . 41
               Section 8.8  Conflicting Interests of Trustee  . . . . . . 42
               Section 8.9  Eligibility of Trustee  . . . . . . . . . . . 42
               Section 8.10  Resignation or Removal of Trustee  . . . . . 42
               Section 8.11  Acceptance by Successor Trustee  . . . . . . 43
               Section 8.12  Successor, by Merger, Etc  . . . . . . . . . 44
               Section 8.13  Limitation on Rights of Trustee as 
                    Creditor  . . . . . . . . . . . . . . . . . . . . . . 44

          ARTICLE IX - CONCERNING THE NOTEHOLDERS . . . . . . . . . . . . 45

               Section 9.1  Action by Noteholders . . . . . . . . . . . . 45
               Section 9.2  Proof of Execution by Noteholders . . . . . . 45
               Section 9.3  Who Are Deemed Absolute Owners  . . . . . . . 45
               Section 9.4  Company-Owned Notes Disregarded . . . . . . . 46
               Section 9.5  Revocation of Consents, Future 
                    Holders Bound . . . . . . . . . . . . . . . . . . . . 47
          ARTICLE X - NOTEHOLDERS MEETINGS  . . . . . . . . . . . . . . . 47

               Section 10.1  Purposes for Which Meetings May be Called  . 47
               Section 10.2  Manner of Calling Meetings; Record Date  . . 47
               Section 10.3  Call of Meeting by Company or Noteholders  . 48
               Section 10.4  Who may Attend and Vote at Meetings  . . . . 48
               Section 10.5  Manner of Voting at Meetings and 
                    Record to be Kept . . . . . . . . . . . . . . . . . . 48
               Section 10.6  Exercise of Rights of Trustee and 
                    Noteholders not to be Hindered or delayed . . . . . . 49

          ARTICLE XI - SUPPLEMENTAL INDENTURES  . . . . . . . . . . . . . 49

               Section 11.1  Supplemental Indentures Without 
                    Consent of Noteholders  . . . . . . . . . . . . . . . 49
               Section 11.2  Supplemental Indentures with Consent of
                    Noteholders . . . . . . . . . . . . . . . . . . . . . 51
               Section 11.3  Effect of Supplemental Indentures  . . . . . 52
               Section 11.4  Notation on Notes  . . . . . . . . . . . . . 52
               Section 11.5  Evidence of Compliance of Supplemental
                    Indenture to be Furnished Trustee . . . . . . . . . . 52

          ARTICLE XII - CONSOLIDATION, MERGER, SALE, CONVEYANCE,TRANSFER AND
               LEASE  . . . . . . . . . . . . . . . . . . . . . . . . . . 53

               Section 12.1  Company May Consolidate, Etc. on 
                    Certain Terms . . . . . . . . . . . . . . . . . . . . 53
               Section 12.2  Successor Company to Be Substituted  . . . . 53
               Section 12.3  Opinion of Counsel to Be Given Trustee . . . 54

          ARTICLE XIII - SATISFACTION AND DISCHARGE OF INDENTURE;UNCLAIMED
               MONEYS . . . . . . . . . . . . . . . . . . . . . . . . . . 54

               Section 13.1  Legal Defeasance and Covenant 
                    Defeasance of the Notes . . . . . . . . . . . . . . . 54
               Section 13.2  Termination of Obligations upon 
                    Cancellation of the Notes . . . . . . . . . . . . . . 57
               Section 13.3  Survival of Certain Obligations  . . . . . . 57
               Section 13.4  Acknowledgment of Discharge by Trustee . . . 58
               Section 13.5  Application of Trust Assets  . . . . . . . . 58
               Section 13.6  Repayment to the Company; Unclaimed Money  . 58
               Section 13.7  Reinstatement  . . . . . . . . . . . . . . . 59

          ARTICLE XIV - IMMUNITY OF INCORPORATORS, STOCKHOLDERS,OFFICERS AND
               DIRECTORS  . . . . . . . . . . . . . . . . . . . . . . . . 59

               Section 14.1  Indenture and Notes Solely Corporate
                    Obligations . . . . . . . . . . . . . . . . . . . . . 59

          ARTICLE XV - CONVERSION OF NOTES  . . . . . . . . . . . . . . . 59

               Section 15.1  Right to Convert . . . . . . . . . . . . . . 59
               Section 15.2  Exercise of Conversion Privilege; 
                    Issuance of Common Stock on Conversion; 
                    No Adjustment for Interest or Dividends . . . . . . . 60
               Section 15.3  Cash Payments in Lieu of Fractional 
                    Shares  . . . . . . . . . . . . . . . . . . . . . . . 62
               Section 15.4  Conversion Price . . . . . . . . . . . . . . 62
               Section 15.5  Adjustment of Conversion Price . . . . . . . 62
               Section 15.6  Effect of Reclassification, 
                    Consolidation, Merger or Sale . . . . . . . . . . . . 72
               Section 15.7  Transfer or Similar Taxes on Shares Issued . 73
               Section 15.8  Reservation of Shares; Shares to Be 
                    Fully Paid; Listing of Common Stock . . . . . . . . . 73
               Section 15.9  Responsibility of Trustee  . . . . . . . . . 74
               Section 15.10  Notice to Holders Prior to Certain 
                    Actions . . . . . . . . . . . . . . . . . . . . . . . 74

          ARTICLE XVI - MISCELLANEOUS PROVISIONS  . . . . . . . . . . . . 75

               Section 16.1  Provisions Binding on Company's 
                    Successors  . . . . . . . . . . . . . . . . . . . . . 75
               Section 16.2  Official Acts by Successor Company . . . . . 75
               Section 16.3  Addresses for Notices, Etc . . . . . . . . . 75
               Section 16.4  Governing Law  . . . . . . . . . . . . . . . 76
               Section 16.5  Evidence of Compliance with Conditions
                    Precedent; Certificates to Trustee  . . . . . . . . . 76
               Section 16.6  Legal Holidays . . . . . . . . . . . . . . . 77
               Section 16.7  No Security Interest Created . . . . . . . . 77
               Section 16.8  Trust Indenture Act  . . . . . . . . . . . . 77
               Section 16.9  Benefits of Indenture  . . . . . . . . . . . 77
               Section 16.10  Table of Contents, Headings Etc . . . . . . 77
               Section 16.11  Authenticating Agent  . . . . . . . . . . . 77
               Section 16.12  Execution in Counterparts . . . . . . . . . 78
               Section 16.13  Pooling of Interests  . . . . . . . . . . . 78

          ARTICLE XVII - EXCHANGE OF NOTES  . . . . . . . . . . . . . . . 79

               Section 17.1  Right to Exchange  . . . . . . . . . . . . . 79
               Section 17.2  Exercise of Exchange Privilege; 
                    Issuance of Preferred Stock on Exchange; 
                    Adjustment for Interest or Dividends  . . . . . . . . 79
               Section 17.3  Cash Payments in Lieu of Fractional Shares . 81
               Section 17.4  Exchange Price . . . . . . . . . . . . . . . 81
               Section 17.5  Adjustment of Exchange Price . . . . . . . . 81
               Section 17.6  Effect of Reclassification, Consolidation,
                    Merger or Sale  . . . . . . . . . . . . . . . . . . . 83
               Section 17.7  Transfer or Similar Taxes on Shares Issued . 84
               Section 17.8  Reservation of Stock; Shares to Be 
                    Fully Paid; Listing of Preferred Stock  . . . . . . . 84
               Section 17.9  Responsibility of Trustee  . . . . . . . . . 85
               Section 17.10  Notice to Holders Prior to Certain 
                    Actions . . . . . . . . . . . . . . . . . . . . . . . 86

               EXHIBIT A - FORM OF DEFINITIVE NOTE  . . . . . . . . . . . 88
               CERTIFICATE OF AUTHENTICATION  . . . . . . . . . . . . . . 91
               ABBREVIATIONS  . . . . . . . . . . . . . . . . . . . . . . 96
               FORM OF CONVERSION NOTICE] CONVERSION NOTICE . . . . . . . 97
               FORM OF EXCHANGE NOTICE] EXCHANGE NOTICE . . . . . . . . . 99
               OPTION TO ELECT REPAYMENT UPON A CHANGE OF CONTROL . . .  101
               FORM OF ASSIGNMENT . . . . . . . . . . . . . . . . . . .  102
               EXHIBIT B - FORM OF GLOBAL NOTE  . . . . . . . . . . . .  104
               FORM OF CERTIFICATE AUTHENTICATION . . . . . . . . . . .  108
               FORM OF REVERSE OF NOTE  . . . . . . . . . . . . . . . .  109
               CONVERSION NOTICE  . . . . . . . . . . . . . . . . . . .  114
               FORM OF EXCHANGE NOTICE  . . . . . . . . . . . . . . . .  116
               FORM OF OPTION TO ELECT REPAYMENT] UPON 
                    A CHANGE OF CONTROL . . . . . . . . . . . . . . . .  118
               EXHIBIT C FORM OF CERTIFICATE OF DESIGNATION . . . . . .  119


____________________________________________________________________________




                  SECURITIES RESALE REGISTRATION RIGHTS AGREEMENT

                          DATED AS OF NOVEMBER 30, 1995

                                 BY AND AMONG

                                TRIBUNE COMPANY

                                    AND

                          SOFTKEY INTERNATIONAL INC.


              SECURITIES RESALE REGISTRATION RIGHTS AGREEMENT

               This SECURITIES RESALE REGISTRATION RIGHTS AGREEMENT
     (this "Agreement") is made and entered into as of November 30,
     1995 by and among SOFTKEY INTERNATIONAL INC., a Delaware
     corporation (the "Company"), and TRIBUNE COMPANY, a Delaware
     corporation (the "Purchaser"), which Purchaser (i) has agreed to
     purchase from the Company $150,000,000 principal amount of 51/2%
     Senior Convertible/ Exchangeable Notes due 2000 (the "Notes")
     pursuant to the Purchase Agreement (as defined below) and (ii)
          will acquire shares of Common Stock (as defined below) pursuant
     to the Merger Agreement (as defined below).

               This Agreement is made pursuant to (i) the Securities
     Purchase Agreement dated as of November 30, 1995 (the "Purchase
     Agreement") by and among the Company and the Purchaser and (ii)
     the Agreement and Plan of Merger dated as of November 30, 1995
     providing for two separate reverse subsidiary mergers of wholly
     owned subsidiaries of the Company with and into wholly owned
     subsidiaries of the Purchaser (the "Merger Agreement").  In order
     to induce the Purchaser to purchase the Notes, the Company has
     agreed to provide the registration rights set forth in this
     Agreement.  The execution and delivery of this Agreement is
     provided for in the Purchase Agreement.

               The parties hereby agree as follows:

     SECTION 1.  DEFINITIONS

               As used in this Agreement, the following capitalized
     terms shall have the following meanings:

               Act:  Securities Act of 1933, as amended.
               Agreement:  As defined in the preamble hereto.

               Broker-Dealer:  Any broker or dealer registered under
     the Exchange Act (as hereinafter defined).

               Certificate of Designation:  The Certificate of
     Designation for the Preferred Shares.

               Closing Date:  The earliest to occur of (a) the closing
     of the transactions contemplated by the Merger Agreement and (b)
     the purchase and sale of the Notes to the Purchaser.

               Commission:  Securities and Exchange Commission.

               Common Stock:  Common Stock of the Company, par value
     $.01 per share.

               Company:  As defined in the preamble hereto.

               Effectiveness Target Date:  As defined in Section 3
     hereof.

               Exchange Act:  Securities Exchange Act of 1934, as
     amended.
               Exempt Resales:  Any transaction exempt from the
     registration requirements of the Act in which the Purchaser sells
     the Notes, including without limitation sales (i) to "qualified
     institutional buyers," as such term is defined in Rule 144A under
     the Act ("QIBs"), (ii) to institutional "accredited investors,"
     as such term is defined in Rule 501(a)(1), (2), (3) or (7) of
     Regulation D under the Act ("Accredited Institutions") and (iii)
     outside the United States, to certain persons in offshore
     transactions in reliance on Regulation S under the Act.

               Holder:  As defined in Section 2(b) hereof.

               Indemnified Holder:  As defined in Section 6(a) hereof.

               Indenture:  The Indenture by and among the Company and
     State Street Bank and Trust Company, as trustee (the "Trustee"),
     pursuant to which the Notes are to be issued, as such Indenture
     as amended, modified or supplemented from time to time in
     accordance with the terms thereof.

               Interest Payment Date:  As defined in the Indenture and
     the Notes.

               NASD:  National Association of Securities Dealers, Inc.

               Person:  An individual, partnership, corporation,
     trust, unincorporated organization or a government, agency or
     political subdivision thereof.

               Preferred Shares:  The Company's 51/2% Series C
     Convertible Preferred Stock into which the Notes are exchangeable
     at the option of the Holders thereof.

               Prospectus:  The prospectus included in the
     Registration Statement, as amended or supplemented including
     without limitation by any post-effective amendments thereto, and
     all material incorporated by reference into such prospectus.

               Purchase Agreement:  As defined in the preamble hereto.

               Purchaser:  As defined in the preamble hereto.

               Registrable Securities:  As defined in Section 3(a)(i)
     hereto.

               Registration Statement:  The continuous registration
     statement of the Company which is filed pursuant to Rule 415
     under the Act, including the Prospectus included therein, all
     amendments and supplements thereto (including any post-effective
     amendments) and all exhibits and material incorporated by
     reference therein.

               Shelf Filing Deadline:  As defined to Section 3 hereof.

               TIA:  The Trust Indenture Act of 1939 (15 U.S.C.
     Section 77aaa-77bbbb), as amended and in effect on the date of
     the Indenture.

               Transfer Restricted Securities:  Each Note, each
     Preferred Share and each share of Common Stock (i) issuable upon
     conversion of the Notes or Preferred Shares and (ii) issuable to
     Purchaser under the Merger Agreement held by the Purchaser or,
     except in the case of shares of Common Stock issuable to
     Purchaser under the Merger Agreement, its transferee until the
     date on which such Note, Preferred Share or share of Common
     Stock, as the case may be, has been registered under the Act and
     disposed of in accordance with an effective Registration
     Statement.

               Underwritten Registration or Underwritten Offering:  A
     registration in which securities of the Company are sold to an
     underwriter for reoffering to the public.

     SECTION 2.  SECURITIES SUBJECT TO THIS AGREEMENT

               (a)  Transfer Restricted Securities:  The securities
     entitled to the benefits of this Agreement are the Transfer
     Restricted Securities and, more particularly, the Registrable
     Securities.
               (b)  Holders of Transfer Restricted Securities.  A
     Person is deemed to be a holder of Transfer Restricted Securities
     (each, a "Holder") whenever such Person owns Transfer Restricted
     Securities of record.

     SECTION 3. REGISTRATION

               (a)  Shelf Registration.  The Company hereby agrees to:

               (i)  use its best efforts to file or cause to be filed
          the Registration Statement on or prior to the 90th day after
          the Closing Date (the "Shelf Filing Deadline"), which
          Registration Statement shall provide for resales of all
          Transfer Restricted Securities except (A) Transfer
          Restricted Securities held by transferees of any Holder who
          or which becomes a Holder after the Registration Statement
          is declared effective and (B) Transfer Restricted Securities
          held by the transferee of any Holder who or which holds less
          than $5,000,000 in principal amount of the Notes or the
          equivalent (on an "as exchanged" or "as converted" basis) in
          Preferred Shares or shares of Common Stock (such Transfer
          Restricted Securities being hereinafter referred to as the
          "Registrable Securities"), provided that the Holders thereof
          shall have provided the information required pursuant to
          Section 3(b) hereof; and

               (ii) use all reasonable efforts to cause the
          Registration Statement to be declared effective by the
          Commission as promptly as practicable after the Closing Date
          (the "Effectiveness Target Date").

     Subject to any notice by the Company in accordance with Section
     4(b) hereof of the existence of any fact or event of the kind
     described in Section 4(b)(iii)(D) hereof, the Company shall use
     all reasonable efforts to keep the Registration Statement
     continuously effective, supplemented and amended as required by
     the provisions of Sections 4(a) and (b) hereof to the extent
     necessary to ensure that it is available for resales of Transfer
     Restricted Securities by the Holders of Transfer Restricted
     Securities entitled to the benefit of this Section 3(a) and to
     ensure that the Registration Statement conforms to the
     requirements of this Agreement, the Act and the policies, rules
     and regulations of the Commission as announced from time to time
     thereunder for a period of at least three years following the
     Closing Date. 

               (b)  Certificated Securities; Provision by Holders of
     Certain Information in Connection with the Registration
     Statement.  No Holder of Registrable Securities may include any
     of its Transfer Restricted Securities in the Registration
     Statement pursuant to this Agreement unless (i) such Holder holds
     such Transfer Restricted Securities in the form of physical
     certificates and (ii) until such Holder furnishes to the Company
     in writing, within 20 business days after receipt of a request
     therefor, such information as the Company may reasonably request
     for use in connection with the Registration Statement or any
     Prospectus or preliminary Prospectus included therein.  In
     connection with all such requests for information from Holders of
     Registrable Securities, the Company shall notify such Holders of
     the requirements set forth in the preceding sentence.  Each
     Holder as to which the Registration Statement is being effected
     agrees to furnish promptly to the Company all information
     required to be disclosed in order to make the information
     previously furnished to the Company by such Holder not materially
     misleading.

     SECTION 4.  REGISTRATION PROCEDURES

               (a)  In connection with the Registration Statement, the
     Company shall comply with all the provisions of Section 4(b)
     below and shall use all reasonable efforts to effect such
     registration to permit the resale of the Registrable Securities
     being sold in accordance with the intended method or methods of
     distribution thereof.

               (b)  In connection with the Registration Statement and
     any Prospectus required by this Agreement, the Company shall:  

               (i)  subject to Section 4(b)(xv) hereof, use all
          reasonable efforts to keep the Registration Statement
          continuously effective and provide all requisite financial
          statements for the period specified in Section 3 of this
          Agreement; upon the occurrence of any event that would cause
          the Registration Statement or the Prospectus contained
          therein (A) to contain a material misstatement or omission
          or (B) not to be effective and usable for resales of
          Registrable Securities during the period required by this
          Agreement, the Company shall file promptly an appropriate
          amendment to the Registration Statement correcting any such
          misstatement or omission, and, in the case of either clause
          (A) or (B), except as set forth in Section 4(b)(xv) below,
          use all reasonable efforts to cause such amendment to be
          declared effective and the Registration Statement and the
          related Prospectus to become usable for their intended
          purpose(s) as soon as practicable thereafter;

               (ii) prepare and file with the Commission such
          amendments and post-effective amendments to the Registration
          Statement as may be necessary to keep the Registration
          Statement effective for the applicable period set forth in
          Section 3 hereof, or such shorter period as will terminate
          when all Registrable Securities covered by the Registration
          Statement have been sold; cause the Prospectus to be
          supplemented by any required Prospectus supplement, and as
          so supplemented, cause the Prospectus to be filed pursuant
          to Rule 424 under the Act and to comply fully with the
          applicable provisions of Rules 424 and 430A under the Act in
          a timely manner; and comply with the provisions of the Act
          with respect to the disposition of all securities covered by
          the Registration Statement during the applicable period in
          accordance with the intended method or methods of
          distribution by the sellers thereof set forth in the
          Registration Statement or supplement to the Prospectus;

          (iii) advise the underwriter(s), if any, and selling
          Holders promptly and, if requested by such Persons, to
          confirm such advice in writing, (A) when the Prospectus or
          any Prospectus supplement or post-effective amendment to the
          Registration Statement has been filed, and, with respect to
          the Registration Statement or any post-effective amendment
          thereto, when the same has become effective, (B) of any
          request by the Commission for amendments to the Registration
          Statement or amendments or supplements to the Prospectus or
          for additional information relating thereto, (C) of the
          issuance by the Commission of any stop order suspending the
          effectiveness of the Registration Statement under the Act or
          of the suspension by any state securities commission of the
          qualification of the Registrable Securities for offering or
          sale in any jurisdiction or of the initiation of any
          proceeding for any of the preceding purposes, (D) of the
          existence of any fact or the happening of any event
          (including without limitation pending negotiations relating
          to, or the consummation of, a transaction or the occurrence
          of any which would require additional disclosure of
          material, nonpublic information by the Company in the
          Registration Statement as to which the Company has a bona
          fide business purpose for preserving confidentiality or
          which renders the Company unable to comply with Commission
          requirements) that makes untrue any statement of a material
          fact made in the Registration Statement, the Prospectus, any
          amendment or supplement thereto or any document incorporated
          by reference therein, or that requires the making of any
          additions to or changes in the Registration Statement or the
          Prospectus in order to make the statements therein not
          misleading.  If at any time the Commission shall issue any
          stop order suspending the effectiveness of the Registration
          Statement, or any state securities commission or other
          regulatory authority shall issue an order suspending the
          qualification or exemption from qualification of the
          Registrable Securities under state securities or Blue Sky
          laws, the Company shall use its best efforts to obtain the
          withdrawal or lifting of such order at the earliest possible
          time;

               (iv)  furnish to each of the selling Holders, upon
          request, and to each of the underwriter(s), if any, before
          filing with the Commission, copies of the Registration
          Statement or any Prospectus included therein and any
          amendments or supplements thereto (including all documents
          incorporated by reference prior to the effectiveness of the
          Registration Statement), which documents, other than
          documents incorporated by reference, will be subject to the
          review of such Holders and underwriter(s), if any, for a
          period of at least five business days, and the Company shall
          not file the Registration Statement or Prospectus or any
          amendment or supplement to the Registration Statement or
          Prospectus to which a selling Holder of Registrable 
          Securities covered by the Registration Statement or the
          underwriter(s), if any, shall reasonably object within five
          business days after the receipt thereof; a selling Holder or
          underwriter(s), if any, shall be deemed to have reasonably
          objected to such filing only if the Registration Statement,
          amendment, Prospectus or supplement, as applicable, as
          proposed to be filed, contains a material misstatement or
          omission;

               (v)  if practicable, promptly prior to the filing of
          any document that is to be incorporated by reference into
          the Registration Statement or Prospectus subsequent to the
          effectiveness thereof, and in any event no later than the
          date such document is filed with the Commission, provide
          copies of such document to the selling Holders, if
          requested, and to the underwriter(s), if any, make
          representatives of the Company available for discussion of
          such document and other customary due diligence matters, and
          include such information in such document prior to the
          filing thereof as such selling Holders or underwriter(s), if
          any, reasonably may request;

               (vi)  make available at reasonable times for inspection
          by the selling Holders, any underwriter(s) participating in
          any disposition pursuant to the Registration Statement and
          any attorney or accountant retained by such selling Holders
          or any of the underwriter(s), all financial and other
          records, pertinent corporate documents and properties of the
          Company and cause the officers, directors and employees of
          the Company to supply all information reasonably requested
          by any such Holder, underwriters, attorney or accountant in
          connection with the Registration Statement subsequent to the
          filing thereof and prior to its effectiveness;

               (vii)  if requested by any selling Holders or the
          underwriters, if any, promptly incorporate in the
          Registration Statement or any Prospectus, pursuant to a
          supplement or post-effective amendment if necessary, such
          information as such selling Holders and underwriters, if
          any, may reasonably request to have included therein,
          including, without limitation, information relating to the
          "Plan of Distribution" of the Registrable Securities,
          information with respect to the principal amount or number
          of shares of Registrable Securities being sold to such
          underwriter(s), the purchase price being paid therefor and
          any other terms of the offering of the Registrable
          Securities to be sold in such offering and make all required
          filings of any such Prospectus supplement or post-effective
          amendment as soon as practicable after the Company is
          notified of the matters to be incorporated in such
          Prospectus supplement or post-effective amendment;

               (viii)  cause the Notes or Preferred Shares covered by
               the Registration Statement to be rated with the appropriate
          rating agencies, if so requested by the Holders of a
          majority in aggregate principal amount of Notes, in the case
          of the Notes, or a majority of the Preferred Shares, in the
          case of the Preferred Shares, or the underwriter(s) for any
          Underwritten Offering of such Notes or Preferred Shares, if
          any;

               (ix)  [Intentionally omitted]

               (x)  deliver to each selling Holder and each of the
          underwriter(s), if any, without charge, as many copies of
          each Prospectus (including each preliminary prospectus
          intended for public distribution) and any amendment or
          supplement thereto as such Persons reasonably may request;
          the Company hereby consents to the use of each Prospectus
          and any amendment or supplement thereto by each of the
          selling Holders and each of the underwriter(s), if any, in
          connection with the offering and the sale of the Transfer
          Restricted  Securities covered by any Prospectus or any
          amendment or supplement thereto;

               (xi)  enter into such customary agreements (including
          an underwriting agreement), and make such customary
          representations and warranties, and, subject to Section
          4(b)(xv) hereof, take all such other customary actions in
          connection therewith in order to expedite or facilitate the
          disposition of the Registrable Securities pursuant to the
          Registration Statement contemplated by this Agreement, all
          to such extent as may be requested by the Purchaser or by
          any Holder of Registrable Securities or underwriter in
          connection with any sale or resale pursuant to the
          Registration Statement contemplated by this Agreement; and
          whether or not an underwriting agreement is entered into and
          whether or not the registration is an Underwritten
          Registration, the Company shall:

                    (A)  furnish to the Purchaser, each selling Holder
               and each underwriter, if any (including any Broker-
               Dealer who may be deemed to be an underwriter),
               officers' certificates, legal opinions and comfort
               letters, in such substance and scope as they may
               request and as are customarily made by issuers to
               underwriters in primary underwritten offerings, upon
               the date of the effectiveness of the Registration
               Statement;

                    (B) set forth in full or incorporate by reference
               in the underwriting agreement, if any, indemnification
               provisions and procedures substantially in the form of
               those set forth in Section 6 hereof with respect to all
               parties required to be indemnified pursuant to said
               Section 6; and

                    (C)  deliver such other documents and certificates
               as may be reasonably requested by such parties to
               evidence compliance with clause (A) above and with any
               customary conditions contained in the underwriting
               agreement or other agreement entered into by the
               Company pursuant to this clause (xi), if any.

               (xii)  prior to any public offering of Registrable 
          Securities, cooperate with the selling Holders, the
          underwriter(s), if any, and their respective counsel in
          connection with the registration and qualification of the
          Registrable Securities under the securities or Blue Sky laws
          of such jurisdictions as the selling Holders or
          underwriter(s) may request; and do any and all other acts or
          things necessary or advisable to enable the disposition in
          such jurisdictions of the Registrable Securities covered by
          the Registration Statement; provided, however, that the
          Company shall not be required to register or qualify as a
          foreign corporation where it is not now so qualified or to
          take any action that would subject it to service of process
          in suits or to taxation, other than as to matters and
          transactions relating to the Registration Statement, in any
          jurisdiction where it is not now so subject;

               (xiii) cooperate with the selling Holders and the
          underwriter(s), if any, to facilitate the timely preparation
          and delivery of certificates representing Transfer
          Restricted Securities to be sold and not bearing any
          restrictive legends; and enable such Registrable Securities
          to be in such denominations and registered in such names as
          the Holders or the underwriter(s), if any, may request at
          least two business days prior to any sale of Registrable 
          Securities made by such underwriter(s);

               (xiv)  use all reasonable efforts to cause the Transfer
          Restricted Securities covered by the Registration Statement
          to be registered with or approved by such other governmental
          agencies or authorities as may be necessary to enable the
          seller or sellers thereof or the underwriter(s), if any, to
          consummate the disposition of such Registrable Securities,
          subject to the proviso contained in clause (xii) above;

               (xv)  as soon as reasonably practicable after the
          occurrence of any fact or event of the kind described in
          clause (b)(iii)(D) above, prepare a supplement or post-
          effective amendment to the Registration Statement or related
          Prospectus or any document incorporated therein by reference
          or file any other required document so that, as thereafter
          delivered to the purchasers of Transfer Restricted
          Securities, the Prospectus will not contain an untrue
          statement of a material fact or omit to state any material
          fact necessary, in light of the circumstances in which it
          was made, to make the statements therein not misleading,
          provided, however, that notwithstanding anything to the
          contrary herein, the Company shall not be required to
          prepare and file such a supplement or post-effective
          amendment or document if the fact no longer exists; and
          provided further however, that, in the event of a material
          business transaction (including without limitation pending
          negotiations relating to such transaction) which based upon
          the advice of outside counsel reasonably acceptable to the
          Purchaser, would require disclosure by the Company in the
          Registration Statement of material, nonpublic information
          which the Company has a bona fide business purpose for not
          disclosing, then for so long as such circumstances and such
          business purpose continue to exist (provided that such
          period may not exceed 120 days in any calendar year), the
          Company shall not be required to prepare and file a
          supplement or post-effective amendment hereunder;

               (xvi)  provide a CUSIP number for all Transfer
          Restricted Securities not later than the effective date of
          the Registration Statement and provide the Trustee under the
          Indenture with printed certificates for the Transfer
          Restricted Securities which are in a form eligible for
          deposit with The Depositary Trust Company;

               (xvii)  cooperate in any filings required to be made
          with the NASD and in the performance of any due diligence
          investigation by any underwriter (including any "qualified
          independent underwriter") that is required to be retained in
          accordance with the rules and regulations of the NASD, and
          use all reasonable efforts to cause the Registration
          Statement to become effective and be approved by such
          governmental agencies or authorities as may be necessary to
          enable the Holders selling Registrable Securities to
          consummate the disposition of such Transfer Restricted 
          Securities;

               (xviii)  otherwise use its reasonable efforts to comply
          with all applicable rules and regulations of the Commission,
          and make generally available to its security holders, as
          soon as practicable, a consolidated earnings statement
          meeting the requirements of Rule 158 (which need not be
          audited) for the twelve-month period (A) commencing at the
          end of any fiscal quarter in which Transfer Restricted 
          Securities are sold to underwriters in a firm commitment or
          best efforts Underwritten Offering or (B) if not sold to
          underwriters in such an offering, beginning with the first
          month of the Company's first fiscal quarter, as applicable,
          commencing after the effective date of the Registration
          Statement;

               (xix)  cause the Indenture to be qualified under the
          TIA not later than the effective date of the Registration
          Statement, and, in connection therewith:  cooperate with the
          Trustee and the Holders of Notes to effect such changes to
          the Indenture as may be required for such Indenture to be so
          qualified in accordance with the terms of the TIA; and
          execute and use all reasonable efforts to cause the Trustee
          to execute, all documents that may be required to effect
          such changes and all other forms and documents required to
          be filed with the Commission to enable such Indenture to be
          so qualified in a timely manner;

               (xx) cause all Registrable  Securities covered by the
          Registration Statement to be listed on any securities
          exchange on which similar securities issued by the Company
          are then listed if requested by the Holders of a majority in
          aggregate principal amount of Notes, the Holders of a
          majority of shares of the Preferred Shares, or the managing
          underwriter(s), if any; and

               (xxi)  provide promptly to each Holder upon request any
          document filed with the Commission pursuant to the
          requirements of Section 13 and Section 15 of the Exchange
          Act.

             Each Holder agrees by acquisition of a Transfer
     Restricted Security that, upon receipt of any notice from the
     Company of the existence of any fact or event of the kind
     described in Section 4(b)(iii)(D) hereof, such Holder will
     forthwith discontinue disposition of Registrable Securities
     pursuant to the applicable Registration Statement until such
     Holder's receipt of the copies of a supplemented or amended
     Prospectus as contemplated by Section 4(b)(xv) hereof, or until
     it is advised in writing (the "Advice) by the Company that the
     use of the Prospectus may be resumed, and, has received copies of
     any additional or supplemental filings that are incorporated by
     reference in the Prospectus.  If so directed by the Company, each
     Holder will deliver to the Company (at the expense of the
     Company) all copies, other than permanent file copies then in
     such Holder's possession, of the Prospectus covering such
     Registrable Securities that was current at the time of receipt of
     such notice.  In the event the Company shall give any such
     notice, the time period regarding the effectiveness of the
     Registration Statement set forth in Section 3 hereof shall be
     extended by the number of days during the period from and
     including the date of the giving of such notice pursuant to
     Section 4(b)(iii)(D) hereof to and including the date when each
     selling Holder covered by the Registration Statement shall have
     received the copies of the supplemented or amended prospectus
     contemplated by Section 4(b)(xv) hereof or shall have received
     the Advice.

             Each Holder, by acquisition of a Transfer Restricted
     Security, agrees that, to the extent that (A) such Holder is
     deemed to be an "affiliate" of the Company for purposes of the
     Securities Act or Accounting Series 130 and 135 of the Commission
     and (B) (i) the Company has entered into a business combination
     transaction intended to be accounted for as a pooling of
     interests and (ii) such accounting treatment requires affiliates
     of the Company to not dispose of or otherwise reduce such
     affiliate's risk with respect to any Common Stock of the Company
     during the period beginning 30 days prior to the effective date
     of the transaction and until after such time as results covering
     at least 30 days of combined operations of the combined entity
     have been published, such Holder shall deliver to the Company an
     "affiliate letter" in reasonable and customary form and
     reasonably satisfactory to the Company.

     SECTION 5. REGISTRATION EXPENSES

             (a) All expenses incident to the Company's performance of
     or compliance with this Agreement will be borne by the Company
     regardless of whether the Registration Statement becomes
     effective, including without limitation:  (i) all registration
     and filing fees and expenses (including, if applicable, the fees
     and expenses of any "qualified independent underwriter" and its
     counsel that may be required by the rules and regulations of the
     NASD); (ii) all fees and expenses associated with compliance with
     federal securities and state Blue Sky or securities laws; (iii)
     all expenses of printing (including printing of any certificates
     evidencing the Notes and Preferred Shares and printing of
     Prospectuses), messenger and delivery services and telephone
     charges; (iv) all fees and disbursements of counsel for the
     Company and, as provided for in Section 5(b) below, the Holders
     of Registrable Securities; (v) all application and filing fees in
     connection with listing any securities on a national securities
     exchange or automated quotation system pursuant to the
     requirements hereof; and (vi) all fees and disbursements of
     independent certified public accountants of the Company
     (including the expenses of any special audit and comfort letters
     required by or incident to such performance).

             The Company will, in any event, bear its own internal
     expenses (including, without limitation, all salaries and
     expenses of its officers and employees performing legal or
     accounting duties), the expenses of any annual audit and the fees
     and expenses of any Person, including special experts, retained
     by the Company.

             (b)  In connection with the Registration Statement
     required by this Agreement, the Company agrees to reimburse the
     Purchaser and the Holders of Transfer Restricted  Securities
     being registered pursuant to the Registration Statement for the
     reasonable fees and disbursements of not more than one counsel,
     who shall be Sidley & Austin or such other counsel as may be
     chosen by the Holders of a majority in principal amount or a
     majority of the shares of the Registrable Securities for whose
     benefit the Registration Statement is being prepared.

     SECTION 6. INDEMNIFICATION

             (a)  The Company agrees to indemnify and hold harmless
     (i)each Holder and (ii) each person, if any, who controls (within
     the meaning of Section 15 of the Act or Section 20 of the
     Exchange Act) any Holder (any of the persons referred to in this
     clause (ii) being hereinafter referred to as a "controlling
     person") and (iii) the respective officers, directors, partners,
     employees, representatives and agents of any Holder or any
     controlling person (any person referred to in clause (i), (ii) or
     (iii) may hereinafter be referred to as an "Indemnified Holder"),
     to the fullest extent lawful, from and against any and all
     losses, claims, damages, liabilities, judgments, costs and
     expenses ("Losses") (including, without limitation and as
     incurred, reimbursement of all costs of investigating, preparing,
     pursuing or defending any claim or action, or any investigation
     or proceeding by any governmental agency or body, commenced or
     threatened, including the reasonable fees and expenses of counsel
     to any Indemnified Holder) directly or indirectly caused by,
     related to, based upon, arising out of or in connection with any
     untrue statement or alleged untrue statement of a material fact
     contained in the Registration Statement or any Prospectus (or any
     amendment or supplement thereto) or any omission or alleged
     omission to state therein a material fact required to be stated
     therein or necessary to make the statements therein, in the light
     of the circumstances under which they were made, not misleading,
     except insofar as such Losses are caused by an untrue statement
     or omission or alleged untrue statement or omission that is made
     in reliance upon and in conformity with information relating to
     any of the Holders furnished in writing to the Company by any of
     the Holders for use therein.  The Company shall notify the
     Holders promptly of the institution, threat or assertion of any
     claim, proceeding (including any governmental investigation) or
     litigation in connection with the matters addressed by this
     Agreement which involves the Company or any Indemnified Holder.

             (b)  In case any action or proceeding (including, without
     limitation, any governmental or regulatory investigation or
     proceeding) shall be brought or asserted against any of the
     Indemnified Holders with respect to which indemnity may be sought
     against the Company, such Indemnified Holder (or the Indemnified
     Holder controlled by such controlling person) shall promptly
     notify the Company in writing (provided that the failure to give
     such notice shall not relieve the Company of its obligations
     pursuant to this Agreement).  Any Indemnified Holder shall have
     the right to employ separate counsel in any such action and
     participate in the defense thereof, but the fees and expenses of
     such counsel shall be at the expense of such Indemnified Holder,
     provided, however, that the fees and expenses of such counsel
     shall be at the expense of the Company if (i) the Company has
     failed to assume the defense and employ counsel reasonably
     satisfactory to the Holders or (ii) the named parties to any such
     action (including impleaded parties) include such Indemnified
     Holder and the Company and such Indemnified Holder shall have
     reasonably concluded that there may be one or more legal defenses
     available to it that are different from or in addition to those
     available to the Company; provided further that the Company shall
     not in such event be responsible hereunder for the fees and
     expenses of more than one firm of separate counsel, which firm
     shall be designated by the Holders, in connection with any action
     in the same jurisdiction, in addition to any local counsel.  The
     Company shall not be liable for any settlement of any such action
     or proceeding effected with its prior written consent, which
     consent shall not be unreasonably withheld or delayed, and the
     Company agrees to indemnify and hold harmless any Indemnified
     Holder from and against any Loss by reason of any settlement of
     any action effected with its written consent.  The Company shall
     not, without the prior written consent of each Indemnified
     Holder, settle or compromise or consent to the entry of a
     judgment in or otherwise seek to terminate any pending or
     threatened action, claim, litigation or proceeding in respect of
     which indemnification or contribution may be sought hereunder
     (whether or not any Indemnified Holder is a party thereto) unless
     such settlement, compromise, consent or termination includes an
     unconditional release of each Indemnified Holder from all
     liability arising out of such action, claim, litigation or
     proceeding.

             (c)  Each Holder of Transfer Restricted  Securities
     agrees, severally and not jointly, to indemnify and hold harmless
     the Company, its directors, its officers, and any person
     controlling (within the meaning of Section 15 of the Act or
     Section 20 of the Exchange Act) the Company, and the respective
     officers, directors, partners, employees, representatives and
     agents of each such person, to the same extent as the foregoing
     indemnity from the Company to each of the Indemnified Holders,
     but only with respect to claims and actions based on information
     relating to such Holder furnished in writing by such Holder for
     use in the Registration Statement or any Prospectus.  In case any
     action or proceeding shall be brought against any of the Company
     or its directors or officers or any such controlling person in
     respect of which indemnity may be sought against a Holder of
     Transfer Restricted  Securities, such Holder shall have the
     rights and duties given the Company, and each of the Company or
     its directors or officers of such controlling person shall have
     the rights and duties given to each Holder by the proceeding
     paragraph.  In no event shall the liability of any selling Holder
     hereunder be greater in amount than the dollar amount of the
     proceeds received by such Holder upon the sale of the securities
     registered pursuant to provisions hereof giving rise to such
     indemnification obligation.

             (d)  If the indemnification provided for in this Section
     6 is unavailable to a party entitled to indemnification in
     respect of any Losses referred to herein, then each indemnifying
     party, in lieu of indemnifying such indemnified party, shall
     contribute to the amount paid or payable by such indemnified
     party as a result of such Losses (i) in such proportion as is
     appropriate to reflect the relative benefits received by the
     Company on the one hand and the Holders on the other hand from
     their sale of Transfer Restricted  Securities or (ii) if such
     allocation is not permitted by applicable law, the relative fault
     of the Company on the one hand and of the indemnified Holder on
     the other in connection with the statements or omissions which
     resulted in the Losses as well as any relevant equitable
     considerations.  The relative fault of the Company on the one
     hand and of the Indemnified Holder on the other shall be
     determined by reference to, among other things, whether the
     untrue or alleged untrue statement of a material fact or the
     omission or alleged omission to state a material fact relates to
     information supplied by the Company or by the Indemnified Holder
     and the parties' relative intent, knowledge, access to
     information and opportunity to correct or prevent such statement
     or omission.  The indemnity and contribution obligations of each
     indemnifying party set forth herein shall be in addition to any
     liability or obligation such indemnifying party may otherwise
     have to any indemnified party.

             The Company and each Holder of Transfer Restricted 
     Securities agree that it would not be just and equitable if
     contribution pursuant to this Section 6(d) were determined by pro
     rata allocation (even if Holders were treated as one entity for
     such purpose) or by any other method of allocation which does not
     take account of the equitable considerations referred to in the
     immediately preceding paragraph.  The amount paid or payable by
     an indemnified party as a result of the Losses referred to in the
     immediately preceding paragraph shall be deemed to include,
     subject to the limitations set forth above, any legal or other
     expenses reasonably incurred by such indemnified party in
     connection with investigating or defending any such action or
     claim.  Notwithstanding the provisions of this Section 6, none of
     the Holders (and their related Indemnified Holders) shall be
     required to contribute, in the aggregate, any amount in excess of
     the amount by which the total proceeds received by such Holder
     with respect to the Notes exceeds the amount of any damages which
     such Holder has otherwise been required to pay by reason of such
     untrue or alleged untrue statement or omission or alleged
     omission.  No person guilty of fraudulent misrepresentation
     (within the meaning of Section 11(f) of the Act) shall be
     entitled to contribution from any person who was not guilty of
     such fraudulent misrepresentation.  The Holders' obligations to
     contribute pursuant to this Section 6(d) are several in
     proportion to the respective principal amount of Notes held by
     each of the Holders hereunder and not joint.

     SECTION 7. RULE 144A

             The Company hereby agrees with each Holder, for so long
     as any Transfer Restricted Securities remain outstanding, to make
     available to any Holder or beneficial owner of Transfer
     Restricted  Securities in connection with any sale thereof and
     any prospective purchase of such Transfer Restricted  Securities
     from such Holder or beneficial owner, any information required to
     be supplied to a Holder by Rule 144A(d)(4) under the Act in order
     to permit offers and sales of such Transfer Restricted Securities
     pursuant to Rule 144A.

     SECTION 8. PARTICIPATION IN UNDERWRITTEN REGISTRATIONS

             No Holder may participate in any Underwritten
     Registration hereunder unless such Holder (a) agrees to sell such
     Holder's Transfer Restricted Securities on the basis provided in
     any underwriting arrangements approved by the Persons entitled
     hereunder to approve such arrangements and (b) completes and
     executes all reasonable questionnaires, powers of attorney,
     indemnities, underwriting agreements, lock-up letters and other
     documents required under the terms of such underwriting
     arrangements.

     SECTION 9. SELECTION OF UNDERWRITERS

             The Holders of Registrable Securities covered by the
     Registration Statement who desire to do so may sell such
     Registrable Securities in an Underwritten Offering.  In any such
     Underwritten Offering, the investment banker or investment
     bankers and manager or managers that will administer the offering
     will be selected by the Holders of a majority in aggregate
     principal amount or a majority of the shares of the Registrable 
     Securities included in such offering; provided that such
     investment bankers and managers must be reasonably satisfactory
     to the Company.

     SECTION 10. MISCELLANEOUS

              (a)  Remedies.  The Company agrees that monetary damages
     would not be adequate compensation for any loss incurred by
     reason of a breach by it of the provisions of this Agreement and
     hereby agrees to waive the defense in any action for specific
     performance that a remedy at law would be adequate.

              (b)  No Inconsistent Agreements.  The Company will not,
     on or after the date of this Agreement, enter into any agreement
     with respect to its securities that is inconsistent with the
     rights granted to the Holders in this Agreement or otherwise
     conflicts with the provisions hereof.  The rights granted to the
     Holders hereunder are not inconsistent with the rights granted to
     the holders of the Company's securities under any agreement in
     effect on the date hereof.

              (c)  Amendments and Waivers.  The provisions of this
     Agreement may not be amended, modified or supplemented, and
     waivers or consents to or departures from the provisions hereof
     may not be given, unless the Company has obtained the written
     consent of Holders of a majority of the outstanding principal
     amount or a majority of the shares of Transfer Restricted 
     Securities.

              (d)  Notices.  All notices and other communications
     provided for or permitted hereunder shall be made in writing by
     hand-delivery, first-class mail (registered or certified, return
     receipt requested), telex, telecopier or courier guaranteeing 
     overnight deliver;

               (i)  if to a Holder, at the address set forth on the
          records of the Registrar under the Indenture, with a copy to
          the Registrar under the Indenture; and

               (ii)  if to the Company:

                         SoftKey International Inc.
                         One Athenaeum Street
                         Cambridge, Massachusetts 02142
                         Attention:  General Counsel

                    with a copy to:

                         Skadden, Arps, Slate, Meagher & Flom
                         One Beacon Street, 31st Floor
                         Boston, Massachusetts 02108
                         Attention:  Louis A. Goodman

               All such notices and communications shall be deemed to
     have been duly given: at the time delivered by hand, if
     personally delivered; five business days after being deposited in
     the mail, postage prepaid, if mailed; when answered back, if
     telexed; when receipt is acknowledged, if telecopied; and on the
     next business day, if timely delivered to a courier guaranteeing
     overnight delivery.

               Copies of all such notices, demands or other
     communications shall be concurrently delivered by the Person
     giving the same to the Trustee at the address specified in the
     Indenture.

               (e)  Successors and Assigns.  This Agreement shall, to
     the extent provided for herein, inure to the benefit of and be
     binding upon the successors and assigns of each of the parties,
     including without limitation and without the need for an express
     assignment, subsequent Holders of Transfer Restricted 
     Securities; provided, however, that this Agreement shall not
     inure to the benefit of or be binding upon a successor or assign
     of a Holder unless and to the extent such successor or assign
     acquired Transfer Restricted  Securities from such Holder.

               (f)  Counterparts.  This Agreement may be executed in
     any number of counterparts and by the parties hereto in separate
     counterparts, each of which when so executed shall be deemed to
     be an original and all of which taken together shall constitute
     one and the same agreement.

               (g)  Headings.  The headings in this Agreement are for
     convenience of reference only and shall not limit or otherwise
     affect the meaning hereof.

               (h)  Governing Law.  THIS AGREEMENT SHALL BE GOVERNED
     BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW
     YORK, WITHOUT REGARD TO THE CONFLICT OF LAW RULES THEREOF.

               (i)  Severability.  In the event that any one or more
     of the provisions contained herein, or the application thereof in
     any circumstance, is held invalid, illegal or unenforceable, the
     validity, legality and enforceability of any such provision in
     every other respect and the remaining provisions contained herein
     shall not be affected or impaired thereby.

               (j)  Entire Agreement.  This Agreement, together with
     the other Transaction Documents (as defined in the Purchase
     Agreement) and the Merger Agreement, is intended by the parties
     as a final expression of their agreement and intended to be a
     complete and exclusive statement of the agreement and
     understanding of the parties hereto in respect of the subject
     matter contained herein.  There are no restrictions, promises,
     warranties or undertakings, other than those set forth or
     referred to herein or therein with respect to the registration
     rights granted by the Company with respect to the Transfer
     Restricted Securities.  This Agreement supersedes all prior
     agreements and understandings between the parties with respect to
     such subject matter.


               IN WITNESS WHEREOF, the parties have executed this
     Agreement as of the date first written above.

                                       SOFTKEY INTERNATIONAL INC.

                                       By:_______________________
                                          Name:
                                          Title:

                                       TRIBUNE COMPANY

                                       By:_______________________
                                          Name:
                                          Title:



____________________________________________________________________________


                                                            EXHIBIT C 

                         SoftKey International Inc.

                         CERTIFICATE OF DESIGNATION
                       OF 5-1/2% SERIES C CONVERTIBLE
                 PREFERRED STOCK SETTING FORTH THE POWERS,
                    PREFERENCES, RIGHTS, QUALIFICATIONS,
                      LIMITATIONS AND RESTRICTIONS OF
                       SUCH SERIES OF PREFERRED STOCK

               Pursuant to Section 151 of the General Corporation Law
     of the State of Delaware, SoftKey International Inc. (the
     "Company"), a corporation organized and existing under the
     General Corporation Law of the State of Delaware, in accordance
     with the provisions of Section 103 thereof, DOES HEREBY CERTIFY:

               That pursuant to the authority conferred upon the Board
     of Directors of the Company (the "Board of Directors") by Article
     4.2.2 of the Restated Certificate of Incorporation of the
     Company, as amended, and in accordance with the provisions of
     Section 151 of the General Corporation Law of the State of
     Delaware, the Board of Directors on ___________, 1995, adopted
     the following resolution authorizing and creating a series of
     Preferred Stock designated as 5-1/2% Series C Convertible
     Preferred Stock:

               RESOLVED that, pursuant to the authority vested in the
     Board of Directors in accordance with the provisions of the
     Restated Certificate of Incorporation, as amended, a series of
     the class of authorized Preferred Stock, par value $.01 per
     share, of the Company is hereby authorized and created and that
     the designation and number of shares thereof and the voting
     powers, preferences and relative, participating, optional and
     other special rights of the shares of such series, and the
     qualifications, limitations and restrictions thereof are as
     follows:

               Section 1.  Designation and Number.  

               Section 1.1  Designation.  The shares of such series
     shall be designated as "5-1/2% Series C Convertible Preferred
     Stock" (the "Series C Preferred Stock").  The maximum number of
     shares of Series C Preferred Stock hereby authorized shall be
     150,000 shares.

               Section 1.2  Priority.  The Series C Preferred Stock
     shall, with respect to the payment of dividends and the
     distribution of assets on liquidation, dissolution or winding up,
     (i) rank prior to the Common Stock, par value $0.01 per share, of
     the Company (the "Common Stock") and (ii) rank on a parity with
     any other series of Preferred Stock hereinafter issued by the
     Company.

               Section 2.  Dividends and Distributions.  

               Section 2.1  Dividends.  The holders of shares of
     Series C Preferred Stock, in preference to the holders of shares
     of Common Stock and of any shares of other capital stock of the
     Company ranking junior to the Series C Preferred Stock as to
     payment of dividends, shall be entitled to receive, when, as and
     if declared by the Board of Directors, out of the assets of the
     Company legally available therefor, dividends in the amount per
     share equal to 5-1/2% per annum of the Liquidation Preference (as
     defined herein) of such share payable or accrued semi-annually on
     May 1 and November 1 in each year commencing May 1, 1996 (each
     such date a "Dividend Payment Date") to the persons in whose
     names the Series C Preferred Stock is registered at the close of
     business on the April 15 and October 15 immediately preceding
     such Dividend Payment Date, as the case may be.  Such dividends
     shall begin to accrue on outstanding shares of Series C Preferred
     Stock from the date of issuance of such shares of Series C
     Preferred Stock; provided, in the case of any Series C Preferred
     Stock issued upon exchange for the Company's $150 million
     principal amount of 5-1/2% Senior Convertible/Exchangeable Notes
     due 2000 (the "Notes"), such dividend shall begin to accrue and
     accumulate from the date on which interest was last paid or duly
     provided for on such Notes, or if no interest has been paid or
     duly provided for prior to the date of such exchange, from
     __________, 1995.  Dividends payable for any partial dividend
     period shall be computed on the basis of a 360-day year of twelve
     30-day months.  Dividends on the Series C Preferred Stock shall
     accrue on a daily basis whether or not funds shall be legally
     available for the payment thereof.  Accrued but unpaid dividends
     on the Series C Preferred Stock shall cumulate as of the Dividend
     Payment Date on which they first become payable, and any and all
     such accrued dividends shall be paid as provided in this Section
     2, Section 5 and Section 7.

               Section 2.2  No Additional Dividends.  The holders of
     shares of Series C Preferred Stock shall not be entitled to
     receive any dividends or other distributions except as provided
     herein.

               Section 3.  Voting Rights.  In addition to any voting
     rights provided by law, the holders of shares of Series C
     Preferred Stock shall have the following voting rights:

               Section 3.1  With Common Stock.  So long as the Series
     C Preferred Stock is outstanding, each share of Series C
     Preferred Stock shall entitle the holder thereof to vote on all
     matters voted on by holders of Common Stock voting together as a
     single class with other shares entitled to vote at all meetings
     of the stockholders of the Company.  With respect to any such
     vote, each share of Series C Preferred Stock shall entitle the
     holder thereof to cast the number of votes equal to the number of
     votes which could be cast in such vote by a holder of the shares
     of capital stock of the Company into which such share of Series C
     Preferred Stock is convertible on the record date for such vote.

               Section 3.2  As a Class.  The affirmative vote of the
     holders of at least 66-2/3% of the outstanding shares of Series C
     Preferred Stock, in person or by proxy, at a special or annual
     meeting of stockholders called for the purpose, shall be
     necessary to (i) authorize, increase the authorized number of
     shares of, or issue (including on conversion or exchange of any
     convertible or exchangeable securities or by reclassification),
     any shares of any class or classes of the Company's capital stock
     ranking prior to (either as to dividends or upon voluntary or
     involuntary liquidation, dissolution or winding up) the Series C
     Preferred Stock; (ii) increase the authorized number of shares
     of, or issue (including on conversion or exchange of any
     convertible or exchangeable securities or by reclassification)
     any shares of, Series C Preferred Stock, except in connection
     with the exchange of the Notes; (iii) authorize, adopt or approve
     an amendment to the Restated Certificate of Incorporation of the
     Company which would decrease the aggregate number of authorized
     shares of Series C Preferred Stock, increase or decrease the par
     value of the shares of Series C Preferred Stock, or alter or
     change the powers, preferences or special rights of the shares of
     Series C Preferred Stock so as to affect such shares of Series C
     Preferred Stock adversely; (iv) authorize or issue shares of any
     class or series of stock not authorized herein having any
     preference or priority as to dividends or assets superior to any
     such preference or priority of the Series C Preferred Stock; or
     (v) reclassify any shares of Common Stock or any other shares of
     capital stock of the Company other than the Series C Preferred
     Stock (such shares other than (A) shares of capital stock of the
     Company ranking senior (either as to dividends or upon
     liquidation, dissolution or winding up of the Company) to the
     Series C Preferred Stock and (B) Parity Stock (as hereinafter
     defined) are hereinafter referred to as "Junior Stock") into
     shares having any preference or priority as to dividends or
     liquidation superior to or on a parity with any such preference
     or priority of the Series C Preferred Stock; provided that Parity
     Stock may be reclassified into a different series of Parity Stock
     without the approval of the holders of Series C Preferred Stock.

               Section 3.3  Right to Elect Directors as a Class.  If
     on any date dividends payable on the Series C Preferred Stock
     shall have been in arrears and not paid in full for three semi-
     annual periods, whether or not consecutive, the number of
     directors constituting the Board of Directors shall, without
     further action, be increased by two and the holders of shares of
     Series C Preferred Stock shall have, in addition to the other
     voting rights set forth herein, the exclusive right, voting
     separately as a single class or as a class with the holders of
     shares of Parity Stock (as hereinafter defined), if such holders
     are then entitled to elect additional directors pursuant to any
     provision of the Certificate of Designation for such stock that
     is similar to this Section 3.3 ("Defaulted Parity Stock"), to
     elect the directors of the Company to fill such newly created
     directorships, the remaining directors to be elected by the other
     classes of stock entitled to vote therefor (including the Series
     C Preferred Stock in accordance with Section 3.1), at each
     meeting of stockholders held for the purpose of electing
     directors.  Such additional directors shall continue as directors
     and such additional voting right shall continue until such time
     as all dividends accumulated on the Series C Preferred Stock have
     been paid in full or all necessary funds have been set aside for
     payment, as the case may be, at which time such additional
     directors shall cease to be directors and such additional voting
     right of the holders of Series C Preferred Stock shall terminate
     subject to revesting in the event of each and every subsequent
     event of the character indicated above.  In no event shall the
     holders of Series C Preferred Stock and/or the holders of Parity
     Stock voting separately or together as a class be entitled to
     elect a total of more than two directors to the Board of
     Directors of the Company pursuant to this Section 3.3 and/or any
     similar provision of the Certificate of Designation for any
     Parity Stock.

               Section 3.4.1  Exercise.  The foregoing rights of
     holders of shares of Series C Preferred Stock to take any actions
     as provided in this Section 3 may be exercised at any annual
     meeting of stockholders or at a special meeting of stockholders
     held for such purpose as hereinafter provided or at any
     adjournment thereof, or by the written consent, delivered to the
     Secretary of the Company, of the holders of the minimum number of
     shares required to take such action.

               So long as such right to vote continues (and unless
     such right has been exercised by written consent of the minimum
     number of shares required to take such action), the Chairman of
     the Board of the Company may call, and, upon the written request
     of holders of record of 20% of the outstanding shares of Series C
     Preferred Stock, if the holders of Series C Preferred Stock are
     to vote separately as a single class, or the holders of record of
     20% of the outstanding shares of Series C Preferred Stock and
     Defaulted Parity Stock, if the holders of shares of Series C
     Preferred Stock are to vote as a class with the holders of shares
     of any Defaulted Parity Stock, addressed to the Secretary of the
     Company at the principal office of the Company, shall call a
     special meeting of the holders of shares entitled to vote as
     provided herein.  Such meeting shall be held within 30 days after
     delivery of such request to the Secretary, at the place and upon
     the notice provided by law and in the By-laws of the Company for
     the holding of meetings of stockholders.

               Section 3.4.2  Quorum.  At each meeting of stockholders
     at which the holders of shares of Series C Preferred Stock shall
     have the right, voting separately as a single class or as a class
     with the holders of shares of any Defaulted Parity Stock, to
     elect directors of the Company as provided in this Section 3 or
     to take any action, the presence in person or by proxy of the
     holders of record of one-third of the total number of shares of
     Series C Preferred Stock, if the holders of shares of Series C
     Preferred Stock are to vote separately as a single class, or the
     holders of record of one-third of the total number of shares of
     Series C Preferred Stock and Defaulted Parity Stock, if the
     holders of shares of Series C Preferred Stock are to vote as a
     class with the holders of shares of any Parity Stock, then
     outstanding and entitled to vote on the matter shall be necessary
     and sufficient to constitute a quorum.  At any such meeting or at
     any adjournment thereof:

               (i) the absence of a quorum of the holders of
          shares of Series C Preferred Stock, if the holders of
          Series C Preferred Stock are to vote separately as a
          single class, or the holders of shares of Series C
          Preferred Stock and Defaulted Parity Stock, if the
          holders of shares of Series C Preferred Stock are to
          vote as a class with the holders of shares of any
          Parity Stock, shall not prevent the election of
          directors other than those to be elected by the holders
          of shares of Series C Preferred Stock or the holders of
          shares of Series C Preferred Stock and Defaulted Parity
          Stock, as the case may be, and the absence of a quorum
          of the holders of shares of any other class or series
          of capital stock shall not prevent the election of
          directors to be elected by the holders of shares of
          Series C Preferred Stock or the holders of shares of
          Series C Preferred Stock and Defaulted Parity Stock, as
          the case may be, or the taking of any action as
          provided in this Section 3; and

               (ii) in the absence of a quorum of the holders of
          shares of Series C Preferred Stock, if the holders of
          Series C Preferred Stock are to vote separately as a
          single class, or the holders of shares of Series C
          Preferred Stock and Defaulted Parity Stock, if the
          holders of Series C Preferred Stock are to vote as a
          class with the holders of shares of any Defaulted
          Parity Stock, a majority of the holders of such shares
          present in person or by proxy shall have the power to
          adjourn the meeting as to the actions to be taken by
          the holders of shares of Series C Preferred Stock or
          the holders of shares of Series C Preferred Stock and
          Defaulted Parity Stock, as the case may be, from time
          to time and place to place without notice other than
          announcement at the meeting until a quorum shall be
          present.

               Section 3.4.3  Votes.  For the taking of any action as
     provided in Sections 3.2 and 3.3 by the holders of shares of
     Series C Preferred Stock or the holders of shares of Series C
     Preferred Stock and Defaulted Parity Stock, as the case may be,
     each such holder shall have one vote for each share of such stock
     standing in his name on the transfer books of the Company as of
     any record date fixed for such purpose or, if no such date be
     fixed, at the close of business on the Business Day (as defined
     in Section 11) next preceding the day on which notice is given,
     or if notice is waived, at the close of business on the Business
     Day next preceding the day on which the meeting is held.

               Section 3.4.4  Directors.  Each director elected by the
     holders of shares of Series C Preferred Stock or the holders of
     shares of Series C Preferred Stock and Defaulted Parity Stock, as
     the case may be, as provided in Section 3.3 shall, unless his
     term shall expire earlier, hold office until the annual meeting
     of stockholders next succeeding his election or until his
     successor, if any, is elected and qualified.

               In case any vacancy shall occur among the directors
     elected by the holders of shares of Series C Preferred Stock or
     the holders of shares of Series C Preferred Stock and Defaulted
     Parity Stock, as the case may be, as provided in Section 3.3,
     such vacancy may be filled for the unexpired portion of the term
     by vote of the remaining director theretofore elected by such
     holders (if there is a remaining director), or such director's
     successor in office.  If any such vacancy is not so filled within
     20 days after the creation thereof or if both directors so
     elected by the holders of Series C Preferred Stock or the holders
     of Series C Preferred Stock and Defaulted Parity Stock, as the
     case may be, shall cease to serve as directors before their terms
     shall expire, the holders of the Series C Preferred Stock or the
     holders of Series C Preferred Stock and Defaulted Parity Stock,
     as the case may be, then outstanding and entitled to vote for
     such directors may, by written consent as herein provided, or at
     a special meeting of such holders called as provided herein,
     elect successors to hold office for the unexpired terms of the
     directors whose places shall be vacant.

               Any director elected by the holders of shares of Series
     C Preferred Stock voting separately as a single class or the
     holders of shares of Series C Preferred Stock voting as a class
     with the holders of shares of Defaulted Parity Stock may be
     removed from office with or without cause by the vote or written
     consent of the holders of at least a majority of the outstanding
     shares of Series C Preferred Stock or a majority of the
     outstanding shares of Series C Preferred Stock and Defaulted
     Parity Stock, as the case may be.  A special meeting of the
     holders of shares of Series C Preferred Stock or the holders of
     shares of Series C Preferred Stock and Defaulted Parity Stock, as
     the case may be, may be called in accordance with the procedures
     set forth in Section 3.4.1.

               Section 3.4.5  Parity Stock.  "Parity Stock" shall mean
     any capital stock of the Company ranking on a parity (either as
     to dividends or upon liquidation, dissolution or winding up of
     the Company) with the Series C Preferred Stock.

               Section 4.  Certain Restrictions.

               Section 4.1  Restrictions on Dividends.  Whenever
     dividends payable on shares of Series C Preferred Stock as
     provided in Section 2 are not paid in full, thereafter and until
     all unpaid dividends payable, whether or not declared, on the
     outstanding shares of Series C Preferred Stock shall have been
     paid in full or declared and set apart for payment, until all
     necessary funds have been set apart for payment, the Company
     shall not:  (A) declare or pay dividends, or make any other
     distributions, on any shares of Junior Stock (as defined in
     Section 3.2), other than dividends or distributions payable in
     Junior Stock; or (B) declare or pay dividends, or make any other
     distributions, on any shares of Parity Stock, except (1)
     dividends or distributions payable in Junior Stock and (2)
     dividends or distributions paid ratably on the Series C Preferred
     Stock and all Parity Stock on which dividends are payable or in
     arrears, in proportion to the total amounts to which the holders
     of all shares of the Series C Preferred Stock and such Parity
     Stock are then entitled; provided, however, that in the case of
     clause (2) the holders of at least 66-2/3% of the outstanding
     shares of Series C Preferred Stock, voting separately as a single
     class, or the holders of at least 66-2/3% of the outstanding
     shares of Series C Preferred Stock and of any Parity Stock the
     approval of holders of which is required for such a pro rata
     dividend or distribution pursuant to any similar provision of the
     Certificate of Designation for such stock, voting together as a
     class, shall have approved the payment of such dividend or
     distribution; and provided, further, that the restrictions of
     this Section 4.1 shall not apply upon the affirmative vote of the
     holders of 66-2/3% of the outstanding shares of Series C
     Preferred Stock.

               Section 4.2  Restrictions on Redemption or Purchase. 
     Whenever dividends payable on shares of Series C Preferred Stock
     as provided in Section 2 are not paid in full, thereafter and
     until all unpaid dividends payable, whether or not declared, on
     the outstanding shares of Series C Preferred Stock shall have
     been paid in full or declared and set apart for payment, until
     all necessary funds have been set apart for payment, the Company
     shall not:  (A) redeem, purchase or otherwise acquire for
     consideration any shares of Junior Stock or Parity Stock;
     provided that (1) the Company may at any time redeem, purchase or
     otherwise acquire shares of Junior Stock or Parity Stock in
     exchange for any shares of Junior Stock, (2) the Company may
     accept shares of any Parity Stock for conversion and (3) the
     Company may at any time redeem, purchase or otherwise acquire
     shares of any Parity Stock pursuant to any mandatory redemption,
     put, sinking fund or other similar obligation, pro rata with the
     Series C Preferred Stock in proportion to the total amount then
     required to be applied by it to repurchase or otherwise acquire
     shares of Series C Preferred Stock and shares of such Parity
     Stock; provided, however, that in the case of clause (3) the
     holders of at least 66-2/3% of the outstanding shares of Series C
     Preferred Stock, voting separately as a single class, or the
     holders of at least 66-2/3% of the outstanding shares of Series C
     Preferred Stock and of any Parity Stock the approval of holders
     of which is required for such a pro rata repurchase or other
     acquisition pursuant to any similar provision of the Certificate
     of Designation for such stock, voting together as a class, shall
     have approved such repurchase or other acquisition; or (B) redeem
     or purchase or otherwise acquire for consideration any shares of
     Series C Preferred Stock; provided that the Company (1) may
     accept shares of Series C Preferred Stock surrendered for
     conversion into shares of capital stock of the Company pursuant
     to Section 8, or (2) may redeem shares of Series C Preferred
     Stock pro rata pursuant to Section 5.2; and provided, further,
     that the restrictions of this Section 4.2 shall not apply upon
     the affirmative vote of the holders of 66-2/3% of the outstanding
     shares of Series C Preferred Stock.

               Section 4.3  Purchase by Subsidiary.  The Company shall
     not permit any subsidiary of the Company to purchase or otherwise
     acquire for consideration any shares of capital stock of the
     Company unless the Company could, pursuant to Section 4.2,
     purchase such shares at such time and in such manner.

               Section 5.  Redemption.  

               Section 5.1  Redemption Prices.  The Company may, at
     its option, redeem all or from time to time any part of the
     Series C Preferred Stock on any date, upon notice as set forth in
     Section 5.2, and at the redemption prices set forth below,
     provided, however, that no such redemption shall be effected
     before November 2, 1998; provided, further, that, notwithstanding
     the foregoing, on November 1, 2000 the Company shall redeem all
     of the Series C Preferred Stock then outstanding.  The redemption
     prices (expressed as percentages of the liquidation value of
     $1,000.00), together in each case with accrued and unpaid
     dividends thereon, whether or not declared, to the date of
     redemption, payable in cash, shall be as follows:

               If redeemed during the 12-month period beginning:

               Date                          Percentage

               November 1, 1998              102.2%
               November 1, 1999              101.1%

     and 100% on and after November 1, 2000.

               Section 5.2  Notice of Redemption, Selection of Series
     C Preferred Stock.  In case the Company shall desire to exercise
     the right to redeem all or, as the case may be, any part of the
     Series C Preferred Stock pursuant to Section 5.1, it shall fix a
     date for redemption and, in the case of any redemption pursuant
     to Section 5.1, it shall mail or cause to be mailed a notice of
     such redemption at least 30 and not more than 60 days prior to
     the date fixed for redemption to the holders of Series C
     Preferred Stock so to be redeemed as a whole or in part at their
     last addresses as the same appear on the books of the Company. 
     Such mailing shall be by first class mail.  The notice, if mailed
     in the manner herein provided, shall be conclusively presumed to
     have been duly given, whether or not the holder receives such
     notice.  In any case, failure to give such notice by mail or any
     defect in the notice to the holder of any Series C Preferred
     Stock designated for redemption as a whole or in part shall not
     affect the validity of the proceedings for the redemption of any
     other shares of Series C Preferred Stock.

               Each such notice of redemption shall specify the
     aggregate number of shares of Series C Preferred Stock to be
     redeemed, the date fixed for redemption, the redemption price at
     which Series C Preferred Stock is to be redeemed, the place or
     places of payment, that payment will be made upon presentation
     and surrender of certificates representing such Series C
     Preferred Stock, that dividends accrued to the date fixed for
     redemption will be paid as specified in said notice and that on
     and after said date, dividends thereon or on the portion thereof
     to be redeemed will cease to accrue.  Such notice shall also
     state the current Conversion Price (as defined below) and the
     date on which the right to convert such Series C Preferred Stock
     into Common Stock will expire.  If fewer than all the Series C
     Preferred Stock is to be redeemed, the notice of redemption shall
     identify the Series C Preferred Stock to be redeemed.

               On or prior to the Business Day prior to the redemption
     date specified in the notice of redemption given as provided in
     this Section, the Company will deposit with one or more paying
     agents (or, if the Company is acting as its own paying agent, set
     aside, segregate and hold in trust) an amount of money sufficient
     to redeem on the redemption date all the Series C Preferred Stock
     so called for redemption (other than those shares theretofore
     surrendered for conversion into Common Stock) at the appropriate
     redemption price, together with accrued dividends to the date
     fixed for redemption.  If any shares of Series C Preferred Stock
     called for redemption are converted pursuant hereto, any money
     deposited with any paying agent or so segregated and held in
     trust for the redemption of such shares of Series C Preferred
     Stock shall be paid to the Company upon its request or, if then
     held by the Company, shall be discharged from such trust.

               If fewer than all the shares of Series C Preferred
     Stock are to be redeemed, the Company shall select the shares of
     Series C Preferred Stock to be redeemed by lot or, in its sole
     discretion, on a pro rata basis. 

               Section 5.3  Payment of Series C Preferred Stock Called
     for Redemption.  If notice of redemption has been given as above
     provided, the Series C Preferred Stock with respect to which such
     notice has been given shall, unless converted into Common Stock
     pursuant to the terms hereof, become due and payable on the date
     and at the place or places stated in such notice at the
     applicable redemption price, together with dividends thereon
     accrued to the date fixed for redemption, and on and after said
     date (unless the Company shall default in the payment of such
     redemption price, together with dividends thereon accrued to said
     date), dividends on the Series C Preferred Stock so called for
     redemption shall cease to accrue, and such Series C Preferred
     Stock shall cease after the close of business on the Business Day
     next preceding the date fixed for redemption to be convertible
     into Common Stock and the holders thereof shall have no right in
     respect of such shares of Series C Preferred Stock except the
     right to receive the redemption price thereof and dividends
     thereon to the date fixed for redemption.  On presentation and
     surrender of Series C Preferred Stock at a place of payment in
     said notice specified, the said Series C Preferred Stock shall be
     paid and redeemed by the Company at the applicable redemption
     price, together with dividends accrued thereon to the date fixed
     for redemption.

               Section 5.4  Conversion Arrangement on Call for
     Redemption.  In connection with any redemption of Series C
     Preferred Stock, the Company may arrange for the purchase and
     conversion of any Series C Preferred Stock by an agreement with
     one or more investment bankers or other purchasers to purchase
     such Series C Preferred Stock by paying to the Company or a
     paying agent designated by the Company in trust for the holders
     of Series C Preferred Stock, on or before the date fixed for
     redemption, an amount not less than the applicable redemption
     price, together with dividends accrued to the date fixed for
     redemption, of such Series C Preferred Stock.  Notwithstanding
     anything to the contrary contained in this Section 5, the
     obligation of the Company to pay the redemption price of such
     Series C Preferred Stock, together with dividends accrued to the
     date fixed for redemption, shall be deemed to be satisfied and
     discharged to the extent such amount is so paid by such
     purchasers.  If such an agreement is entered into, any Series C
     Preferred Stock not duly surrendered for conversion by the
     holders thereof may, at the option of the Company, be deemed, to
     the fullest extent permitted by law, acquired by such purchasers
     from such holders and (notwithstanding anything to the contrary
     contained in Section 8) surrendered by such purchasers for
     conversion, all as of immediately prior to the close of business
     on the date fixed for redemption (and the right to convert any
     such Series C Preferred Stock shall be deemed to have been
     extended through such time), subject to payment of the above
     amount as aforesaid.  At the direction of the Company, any
     payment agent appointed by the Company shall hold and dispose of
     any such amount paid to it in the same manner as it would monies
     deposited with it by the Company for the redemption of Series C
     Preferred Stock.

               Section 5.5.  Purchase of Series C Preferred Stock Upon
     a Change of Control.

               Section 5.5.1  If a Change of Control (as defined in
     Section 11) shall occur at any time, then each holder of Series C
     Preferred Stock shall have the right to require that the Company
     purchase, to the extent that the Company shall have funds legally
     available therefor, such holder's shares of Series C Preferred
     Stock in whole or in part at a purchase price (the "Change of
     Control Purchase Price") in cash in an amount equal to 101% of
     the Liquidation Preference of such Series C Preferred Stock, plus
     accrued and unpaid dividends thereon, if any, to the repurchase
     date (the "Change of Control Purchase Date") pursuant to the
     offer described below (the "Change of Control Offer") and in
     accordance with the other procedures set forth herein.

               Section 5.5.2  Within 30 days following any Change of
     Control, the Company shall give written notice of such Change of
     Control to each holder of Series C Preferred Stock, by first-
     class mail, postage prepaid, at his address appearing on the
     books of the Company, stating, among other things:  that a Change
     of Control has occurred; the Change of Control Purchase Price and
     the Change of Control Purchase Date (which shall be a Business
     Day no earlier than 30 days nor later than 60 days from the date
     such notice is mailed, or such later date as is necessary to
     comply with requirements under the Exchange Act); that any shares
     of Series C Preferred Stock not tendered will continue to accrue
     dividends; that, unless the Company defaults in the payment of
     the Change of Control Purchase Price, any shares of Series C
     Preferred Stock accepted for payment pursuant to the Change of
     Control Offer shall cease to accrue dividends after the Change of
     Control Purchase Date; and certain other procedures that a holder
     of Series C Preferred Stock must follow to accept a Change of
     Control Offer or to withdraw such acceptance.

               Section 5.5.3  The Company will comply with the
     applicable tender offer rules, including Rule 13e-4 under the
     Exchange Act, and any other applicable securities laws or
     regulations in connection with a Change of Control Offer.

               Section 5.5.4  The Company will not, and will not
     permit any subsidiary to, create or permit to exist or become
     effective any restriction that would materially impair the
     ability of the Company to make a Change of Control Offer to
     purchase the Series C Preferred Stock or, if such Change of
     Control Offer is made, to pay for the Series C Preferred Stock
     tendered for purchase.

               Section 6.  Reacquired Shares.  Any shares of Series C
     Preferred Stock converted, redeemed, purchased or otherwise
     acquired by the Company in any manner whatsoever shall be retired
     and canceled promptly after the acquisition thereof.  All such
     shares of Series C Preferred Stock shall upon their cancellation,
     and upon the filing of an appropriate certificate with the
     Secretary of State of the State of Delaware, become authorized
     but unissued shares of Preferred Stock, par value $.01 per share,
     of the Company, undesignated as to series, and may be reissued as
     part of another series of Preferred Stock, par value $.01 per
     share, of the Company subject to the conditions or restrictions
     on issuance set forth herein.

               Section 7.  Liquidation, Dissolution or Winding Up. 

               Section 7.1  Bankruptcy or Insolvency.  If the Company
     shall commence a voluntary case under the Federal bankruptcy laws
     or any other applicable Federal or State bankruptcy, insolvency
     or similar law, or consent to the entry of an order for relief in
     an involuntary case under any such law or to the appointment of a
     receiver, liquidator, assignee, custodian, trustee, sequestrator
     (or other similar official) of the Company or of any substantial
     part of its property, or make an assignment for the benefit of
     its creditors, or admit in writing its inability to pay its debts
     generally as they become due, or if a decree or order for relief
     in respect of the Company shall be entered by a court having
     jurisdiction in the premises in an involuntary case under the
     Federal bankruptcy laws or any other applicable Federal or State
     bankruptcy, insolvency or similar law, or appointing a receiver,
     liquidator, assignee, custodian, trustee, sequestrator (or other
     similar official) of the Company or any substantial part of its
     property, or ordering the winding up or liquidation of its
     affairs, and any such decree or order shall be unstayed and in
     effect for a period of 90 consecutive days and on account of any
     such event the Company shall liquidate, dissolve or wind up, or
     if the Company shall otherwise liquidate, dissolve or wind up, no
     distribution shall be made (i) to the holders of shares of Junior
     Stock unless, prior thereto, the holders of shares of Series C
     Preferred Stock, subject to Section 8, shall have received the
     Liquidation Preference with respect to each share, or (ii) to the
     holders of shares of Parity Stock, except distributions made
     ratably on the Series C Preferred Stock and all Parity Stock in
     proportion to the total amounts to which the holders of all
     shares of the Series C Preferred Stock and Parity Stock are
     entitled upon such liquidation, dissolution or winding up. 
     "Liquidation Preference" shall mean $1,000.00 per share of Series
     C Preferred Stock, plus an amount equal to all accrued and unpaid
     dividends thereon.  After payment of the full amount to which the
     holders of Series C Preferred Stock are entitled as provided in
     this Section 7.1, such holders shall have no further right or
     claim to any of the remaining assets of the Company.

               Section 7.2  Consolidation or Merger.  Neither the
     consolidation, merger or other business combination of the
     Company with or into any other person or persons nor the sale,
     lease, exchange or other transfer of all or substantially all the
     assets of the Company shall be deemed to be a liquidation,
     dissolution or winding up of the Company for purposes of this
     Section 7.

               Section 7.3  Proportionate Amount.  The Liquidation
     Preference with respect to each fractional share of Series C
     Preferred Stock outstanding shall be equal to a ratably
     proportionate amount of the Liquidation Preference with respect
     to each outstanding share of Series C Preferred Stock.

                                 SECTION 8.

                     CONVERSION OF SERIES C PREFERRED STOCK

              Section 8.1  Right to Convert.  Subject to and upon
     compliance with the provisions of this Certificate of
     Designation, the holder of any share of Series C Preferred Stock
     shall have the right, at his option, at any time (except that,
     with respect to any shares of Series C Preferred Stock which
     shall be called for redemption or delivered for repurchase, such
     right shall terminate, except as provided in the third paragraph
     of Section 8.2, at the close of business on the last Trading Day
     prior to the date fixed for redemption of such shares of Series C
     Preferred Stock unless the Company shall default in payment due
     upon redemption thereof) to convert any such share into that
     number of fully paid and nonassessable shares of Common Stock (as
     such shares shall then be constituted) obtained by dividing
     $1,000.00 for each such share so converted by the Conversion
     Price in effect at such time, by surrender of the shares so to be
     converted in the manner provided in Section 8.2.  A holder of
     Series C Preferred Stock is not entitled to any rights of a
     holder of Common Stock until such holder has converted his Series
     C Preferred Stock to Common Stock, and only to the extent such
     Series C Preferred Stock is deemed to have been converted to
     Common Stock under this Section 8.

              Section 8.2  Exercise of Conversion Privilege; Issuance
     of Common Stock on Conversion; No Adjustment for Dividends.  In
     order to exercise the conversion privilege with respect to any
     Series C Preferred Stock, the holder of any such share of Series
     C Preferred Stock to be converted in whole or in part shall
     surrender such share of Series C Preferred Stock, duly endorsed,
     at the principal office of the Company or with the Transfer Agent
     for the Common Stock, and shall give written notice of conversion
     in the form provided on the share of Series C Preferred Stock (or
     such other notice which is acceptable to the Company) to the
     office or agency that the holder elects to convert such shares
     specified in said notice.  Such notice shall also state the name
     or names (with address) in which the certificate or certificates
     for shares of Common Stock which shall be issuable on such
     conversion shall be issued and shall be accompanied by transfer
     taxes, if required pursuant to Section 8.7.  Each such share
     surrendered for conversion shall, unless the shares issuable on
     conversion are to be issued in the same name as the registration
     of such share of Series C Preferred Stock, be duly endorsed by,
     or be accompanied by instruments of transfer in form satisfactory
     to the Company duly executed by, the holder or his duly
     authorized attorney.

              As promptly as practicable after satisfaction of the
     requirements for conversion set forth above, subject to
     compliance with any restrictions on transfer if shares issuable
     on conversion are to be issued in a name other than that of the
     shareholder (as if such transfer were a transfer of the shares so
     converted), the Company shall issue and shall deliver to such
     holder at the address designated in the notice of conversion, a
     certificate or certificates for the number of full shares
     issuable upon the conversion of such shares in accordance with
     the provisions of this Section 8 and a check or cash in respect
     of any fractional interest in respect of a share of Common Stock
     arising upon such conversion, as provided in Section 8.  In case
     any certificate shall be surrendered for partial conversion, the
     Company shall issue and deliver to the holder of the certificate
     so surrendered, without charge to him, a new certificate or
     certificates in an aggregate share amount equal to the
     unconverted portion of the surrendered certificate.

              Each conversion shall be deemed to have been effected as
     to any such certificate on the date on which the requirements set
     forth above in this Section 8.2 have been satisfied as to such
     certificate, and the person in whose name any certificate or
     certificates for shares of Common Stock shall be issuable upon
     such conversion shall be deemed to have become on said date the
     holder of record of the shares represented thereby; provided,
     however, that any such surrender on any date when the stock
     transfer books of the Company shall be closed shall constitute
     the person in whose name the certificates are to be issued as the
     record holder thereof for all purposes on the next succeeding day
     on which such stock transfer books are open, but such conversion
     shall be at the Conversion Price in effect on the date upon which
     such Series C Preferred Stock shall have been surrendered.

              Section 8.3  Cash Payments in Lieu of Fractional Shares. 
     No fractional shares of Common Stock or scrip representing
     fractional shares shall be issued upon conversion of Series C
     Preferred Stock.  If more than one certificate for shares of
     Preferred Stock shall be surrendered for conversion at one time
     by the same holder, the number of full shares which shall be
     issuable upon conversion shall be computed on the basis of the
     aggregate shares of Series C Preferred Stock (or specified
     portions thereof to the extent permitted hereby) so surrendered. 
     If any fractional share of stock would be issuable upon the
     conversion of any Series C Preferred Stock, the Company shall
     make an adjustment therefor in cash at the current market value
     thereof.  The current market value of a share of Common Stock
     shall be the Closing Price on the first Trading Day immediately
     preceding the day on which the Series C Preferred Stock is deemed
     to have been converted and such Closing Price shall be determined
     as provided in Section 8.5.7.

              Section 8.4  Conversion Price.  The conversion price
     shall be $53.00 (herein called the "Conversion Price") subject to
     adjustment as provided in this Section 8.

              Section 8.5 Adjustment of Conversion Price.  The
     Conversion Price shall be adjusted from time to time by the
     Company as follows:

              Section 8.5.1  In case the Company shall hereafter pay a
     dividend or make a distribution to all holders of the outstanding
     Common Stock in shares of Common Stock, the Conversion Price in
     effect at the opening of business on the date following the date
     fixed for the determination of stockholders entitled to receive
     such dividend or other distribution shall be reduced by
     multiplying such Conversion Price by a fraction the numerator of
     which shall be the number of shares of Common Stock outstanding
     at the close of business on the Record Date (as defined in
     Section 8.5.7) fixed for such determination and the denominator
     of which shall be the sum of such number of shares and the total
     number of shares constituting such dividend or other
     distribution, such reduction to become effective immediately
     after the opening of business on the day following the Record
     Date.  The Company will not pay any dividend or make any
     distribution on shares of Common Stock held in the treasury of
     the Company.

              Section 8.5.2  In case the Company shall issue rights or
     warrants to all holders of its outstanding shares of Common Stock
     entitling them (for a period expiring within 45 days after the
     date fixed for determination of stockholders entitled to receive
     such rights or warrants) to subscribe for or purchase shares of
     Common Stock at a price per share less than the Current Market
     Price (as defined in Section 8.5.7) on the Record Date fixed for
     determination of stockholders entitled to receive such rights or
     warrants, the Conversion Price shall be adjusted so that the same
     shall equal the price determined by multiplying the Conversion
     Price in effect at the opening of business on the date after the
     Record Date by a fraction the numerator of which shall be the
     number of shares of Common Stock outstanding at the close of
     business on the Record Date plus the number of shares which the
     aggregate offering price of the total number of shares so offered
     would purchase at such Current Market Price, and the denominator
     of which shall be the number of shares of Common Stock
     outstanding on the close of business on the Record Date plus the
     total number of additional shares of Common Stock so offered for
     subscription or purchase.  Such adjustment shall become effective
     immediately after the opening of business on the day following
     the Record Date fixed for determination of stockholders entitled
     to receive such rights or warrants.  To the extent that shares of
     Common Stock are not delivered after the expiration or
     termination of such rights or warrants, the Conversion Price
     shall be readjusted to the Conversion Price which would then be
     in effect had the adjustments made upon the issuance of such
     rights or warrants been made on the basis of delivery of only the
     number of shares of Common Stock actually delivered.  In the
     event that such rights or warrants are not so issued, the
     Conversion Price shall again be adjusted to be the Conversion
     Price which would then be in effect if such date fixed for the
     determination of stockholders entitled to receive such rights or
     warrants had not been fixed.  In determining whether any rights
     or warrants entitle the holders to subscribe for or purchase
     shares of Common Stock at less than such Current Market Price,
     and in determining the aggregate offering price of such shares of
     Common Stock, there shall be taken into account any consideration
     received for such rights or warrants, the value of such
     consideration, if other than cash, to be determined by the Board
     of Directors.

              Section 8.5.3  In case outstanding shares of Common
     Stock shall be subdivided into a greater number of shares of
     Common Stock, the Conversion Price in effect at the opening of
     business on the day following the day upon which such subdivision
     becomes effective shall be proportionately reduced, and
     conversely, in case outstanding shares of Common Stock shall be
     combined into a smaller number of shares of Common Stock, the
     Conversion Price in effect at the opening of business on the day
     following the day upon which such combination becomes effective
     shall be proportionately increased, such reduction or increase,
     as the case may be, to become effective immediately after the
     opening of business on the day following the day upon which such
     subdivision or combination becomes effective.

              Section 8.5.4  In case the Company shall, by dividend or
     otherwise, distribute to all holders of its Common Stock shares
     of any class of capital stock of the Company (other than any
     dividends or distributions to which Section 8.5.1 applies) or
     evidences of its indebtedness or assets (including securities,
     but excluding any rights or warrants referred to in Section
     8.5.2, and excluding any dividend or distribution (x) in
     connection with the liquidation, dissolution or winding-up of the
     Company, whether voluntary or involuntary, (y) exclusively in
     cash or (z) referred to in Section 8.5.1 (any of the foregoing
     hereinafter in this Section 8.5.4 called the "Securities")),
     then, in each such case, the Conversion Price shall be reduced so
     that the same shall be equal to the price determined by
     multiplying the Conversion Price in effect immediately prior to
     the close of business on the Record Date (as defined in Section
     8.5.7) with respect to such distribution by a fraction of which
     the numerator shall be the Current Market Price (determined as
     provided in Section 8.5.7) on such date less the fair market
     value (as determined by the Board of Directors, whose
     determination shall be conclusive and described in a resolution
     of such board) on such date of the portion of the Securities so
     distributed applicable to one share of Common Stock and the
     denominator shall be such Current Market Price, such reduction to
     become effective immediately prior to the opening of business on
     the day following the Record Date; provided, however, that in the
     event the then fair market value (as so determined) of the
     portion of the Securities so distributed applicable to one share
     of Common Stock is equal to or greater than the Current Market
     Price on the Record Date, in lieu of the foregoing adjustment,
     adequate provision shall be made so that each holder of Series C
     Preferred Stock shall have the right to receive upon conversion
     the amount of Securities such holder would have received had such
     holder converted each Series C Preferred Stock on such date.  In
     the event that such dividend or distribution is not so paid or
     made, the Conversion Price shall again be adjusted to be the
     Conversion Price which would then be in effect if such dividend
     or distribution had not been declared.  If the Board of Directors
     determines the fair market value of any distribution for purposes
     of this Section 8.5.4 by reference to the actual or when issued
     trading market for any securities comprising all or part of such
     distribution, it must in doing so consider the prices in such
     market over the same period used in computing the Current Market
     Price pursuant to Section 8.5.7 to the extent possible.

             Notwithstanding the foregoing provisions of this Section
     8.5.4, no adjustment shall be made hereunder for any distribution
     of Securities if the Company makes proper provision so that each
     holder of Series C Preferred Stock who converts such Series C
     Preferred Stock after the date fixed for determination of
     stockholders entitled to receive such distribution shall be
     entitled to receive upon such conversion, in addition to the
     shares of Common Stock issuable upon such conversion, the amount
     and kind of Securities that such holder would have been entitled
     to receive if such holder had, immediately prior to such
     determination date, converted such Series C Preferred Stock into
     Common Stock; provided that, with respect to any Securities that
     are convertible, exchangeable or exercisable, the foregoing
     provision shall only apply to the extent (and so long as) the
     Securities receivable upon conversion of such Series C Preferred
     Stock would be convertible, exchangeable or exercisable, as
     applicable, without any loss of rights or privileges for a period
     of at least 60 days following conversion of such Series C
     Preferred Stock.

             Rights or warrants distributed by the Company to all
     holders of Common Stock entitling the holders thereof to
     subscribe for or purchase shares of the Company's capital stock
     (either initially or under certain circumstances), which rights
     or warrants, until the occurrence of a specified event or events
     ("Trigger Event"): (i) are deemed to be transferred with such
     shares of Common Stock, (ii) are not exercisable and (iii) are
     also issued in respect of future issuances of Common Stock, shall
     not be deemed distributed for purposes of this Section 8.5.4 (and
     no adjustment to the Conversion Price under Section 8.5.4 will be
     required) until the occurrence of the earliest Trigger Event.  In
     addition, in the event of any distribution of rights or warrants,
     or any Trigger Event with respect thereto, that shall have
     resulted in an adjustment to the Conversion Price under this
     Section 8.5.4, (1) in the case of any such rights or warrants
     which shall all have been redeemed or repurchased without
     exercise by any holders thereof, the Conversion Price shall be
     readjusted upon such final redemption or repurchase to give
     effect to such distribution or Trigger Event, as the case may be,
     as though it were a cash distribution, equal to the per share
     redemption or repurchase price received by a holder of Common
     Stock with respect to such rights or warrants (assuming such
     holder had retained such rights or warrants), made to all holders
     of Common Stock as of the date of such redemption or repurchase,
     and (2) in the case of such rights or warrants all of which shall
     have expired or been terminated without exercise by any holder
     thereof, the Conversion Price shall be readjusted as if such
     issuance had not occurred.

              For purposes of this Section 8.5.4 and Sections 8.5.1
     and 8.5.2, any dividend or distribution to which this Section
     8.5.4 is applicable that also includes shares of Common Stock, or
     rights or warrants to subscribe for or purchase shares of Common
     Stock (or both), shall be deemed instead to be (1) a dividend or
     distribution of the evidences of indebtedness, assets or shares
     of capital stock other than such shares of Common Stock or rights
     or warrants (and any Conversion Price reduction required by this
     Section 8.5.4 with respect to such dividend or distribution shall
     then be made) immediately followed by (2) a dividend or
     distribution of such shares of Common Stock or such rights or
     warrants (and any further Conversion Price reduction required by
     Sections 8.5.1 and 8.5.2 with respect to such dividend or
     distribution shall then be made, except (A) the Record Date of
     such dividend or distribution shall be substituted as "the date
     fixed for the determination of stockholders entitled to receive
     such dividend or other distribution" and "the date fixed for such
     determination" within the meaning of Sections 8.5.1 and 8.5.2 and
     (B) any shares of Common Stock included in such dividend or
     distribution shall not be deemed "outstanding at the close of
     business on the date fixed for such determination" within the
     meaning of Section 8.5.1).

               Section 8.5.5  In case the Company shall, by dividend
     or otherwise, distribute to all holders of its Common Stock cash
     (excluding any cash that is distributed upon a merger or
     consolidation to which Section 8.6 applies or as part of a
     distribution referred to in Section 8.5.4) in an aggregate amount
     that, combined together with (1) the aggregate amount of any
     other such distributions to all holders of its Common Stock made
     exclusively in cash within the twelve (12) months preceding the
     date of payment of such distribution, and in respect of which no
     adjustment pursuant to this Section 8.5.5 has been made, and (2)
     the aggregate of any cash plus the fair market value (as
     determined by the Board of Directors, whose determination shall
     be conclusive and described in a resolution of such board) of
     consideration payable in respect of any tender offer, by the
     Company or any of its subsidiaries for all or any portion of the
     Common Stock concluded within the twelve (12) months preceding
     the date of payment of such distribution, and in respect of which
     no adjustment pursuant to Section 8.5.6 has been made, exceeds
     20.0% of the product of the Current Market Price (determined as
     provided in Section 8.5.7) on the Record Date with respect to
     such distribution times the number of shares of Common Stock
     outstanding on such date, then, and in each such case,
     immediately after the close of business on such date, unless the
     Company elects to reserve such cash for distribution to the
     holders of the Series C Preferred Stock upon the conversion of
     the Series C Preferred Stock so that any such holder converting
     Series C Preferred Stock will receive upon such conversion, in
     addition to the shares of Common Stock to which such holder is
     entitled, the amount of cash which such holder would have
     received if such holder had, immediately prior to the Record Date
     for such distribution of cash, converted its Series C Preferred
     Stock into Common Stock, the Conversion Price shall be reduced so
     that the same shall equal the price determined by multiplying the
     Conversion Price in effect immediately prior to the close of
     business on such date by a fraction (i) the numerator of which
     shall be equal to the Current Market Price on the Record Date
     less an amount equal to the quotient of (x) the excess of such
     combined amount over such 20.0% and (y) the number of shares of
     Common Stock outstanding on the Record Date and (ii) the
     denominator of which shall be equal to the Current Market Price
     on such date; provided, however, that in the event the portion of
     the cash so distributed applicable to one share of Common Stock
     is equal to or greater than the Current Market Price of the
     Common Stock on the Record Date, in lieu of the foregoing
     adjustment, adequate provision shall be made so that each Series
     C Preferred Stock shareholder shall have the right to receive
     upon conversion the amount of cash such holder would have
     received had such holder converted each share of Series C
     Preferred Stock on the Record Date.  In the event that such
     dividend or distribution is not so paid or made, the Conversion
     Price shall again be adjusted to be the Conversion Price which
     would then be in effect if such dividend or distribution had not
     been declared.

              Section 8.5.6  In case a tender offer made by the
     Company or any of its subsidiaries for all or any portion of the
     Common Stock shall expire and such tender offer (as amended upon
     the expiration thereof) shall require the payment to stockholders
     (based on the acceptance (up to any maximum specified in the
     terms of the tender offer) of Purchased Shares (as defined
     below)) of an aggregate consideration having a fair market value
     (as determined by the Board of Directors, whose determination
     shall be conclusive and described in a resolution of such board)
     that combined together with (1) the aggregate of the cash plus
     the fair market value (as determined by the Board of Directors,
     whose determination shall be conclusive and described in a
     resolution of such board), as of the expiration of such tender
     offer, of consideration payable in respect of any other tender
     offer, by the Company or any of its subsidiaries for all or any
     portion of the Common Stock expiring within the twelve (12)
     months preceding the expiration of such tender offer, and in
     respect of which no adjustment pursuant to this Section 8.5.6 has
     been made, and (2) the aggregate amount of any distributions to
     all holders of the Company's Common Stock made exclusively in
     cash within twelve (12) months preceding the expiration of such
     tender offer, and in respect of which no adjustment pursuant to
     Section 8.5.5 has been made, exceeds 20.0% of the product of the
     Current Market Price (determined as provided in Section 8.5.7) as
     of the last time (the "Expiration Time") tenders could have been
     made pursuant to such tender offer (as it may be amended) times
     the number of shares of Common Stock outstanding (including any
     tendered shares) on the Expiration Time, then, and in each such
     case, immediately prior to the opening of business on the day
     after the date of the Expiration Time, the Conversion Price shall
     be adjusted so that the same shall equal the price determined by
     multiplying the Conversion Price in effect immediately prior to
     close of business on the date of the Expiration Time by a
     fraction of which the numerator shall be the number of shares of
     Common Stock outstanding (including any tendered shares) on the
     Expiration Time multiplied by the Current Market Price of the
     Common Stock on the Trading Day next succeeding the Expiration
     Time and the denominator shall be the sum of (x) the fair market
     value (determined as aforesaid) of the aggregate consideration
     payable to stockholders based on the acceptance (up to any
     maximum specified in the terms of the tender offer) of all shares
     validly tendered and not withdrawn as of the Expiration Time (the
     shares deemed so accepted, up to any such maximum, being referred
     to as the "Purchased shares") and (y) the product of the number
     of shares of Common Stock outstanding (less any Purchased Shares)
     on the Expiration Time and the Current Market Price of the Common
     Stock on the Trading Day next succeeding the Expiration Time,
     such reduction to become effective immediately prior to the
     opening of business on the day following the Expiration Time.  In
     the event that the Company is obligated to purchase shares
     pursuant to any such tender offer, but the Company is permanently
     prevented by applicable law from effecting any such purchases or
     all such purchases are rescinded, the Conversion Price shall
     again be adjusted to be the Conversion Price which would then be
     in effect if such tender offer had not been made.

              Section 8.5.7  For purposes of this section 8.5, the
     following terms shall have the meaning indicated:

              (1)  "Closing Price" with respect to any securities on
     any day shall mean the closing sale price regular way on such day
     or, in case no such sale takes place on such day, the average of
     the reported closing bid and asked prices, regular way, in each
     case on the New York Stock Exchange, or, if such security is not
     listed or admitted to trading on such Exchange, on the principal
     national security exchange or quotation system on which such
     security is quoted or listed or admitted to trading, or, if not
     quoted or listed or admitted to trading on any national
     securities exchange or quotation system, the average of the
     closing bid and asked prices of such security on the over-the-
     counter market on the day in question as reported by the National
     Quotation Bureau Incorporated, or a similar generally accepted
     reporting service, or if not so available, in such manner as
     furnished by any New York Stock Exchange member firm selected
     from time to time by the Board of Directors for that purpose, or
     a price determined in good faith by the Board of Directors, whose
     determination shall be conclusive and described in a resolution
     of such board.

              (2)  "Current Market Price" shall mean the average of
     the daily Closing Prices per share of Common Stock for the ten
     consecutive Trading Days immediately prior to the date in
     question; provided, however, that (1) if the "ex" date (as
     hereinafter defined) for any event (other than the issuance or
     distribution or Change of Control requiring such computation)
     that requires an adjustment to the Conversion Price pursuant to
     Section 8.5.1, 8.5.2, 8.5.3, 8.5.4, 8.5.5 or 8.5.6 occurs during
     such ten consecutive Trading Days, the Closing Price for each
     Trading Day prior to the "ex" date for such other event shall be
     adjusted by multiplying such Closing Price by the same fraction
     by which the Conversion Price is so required to be adjusted as a
     result of such other event, (2) if the "ex" date for any event
     (other than the issuance, distribution or Change of Control
     requiring such computation) that requires an adjustment to the
     Conversion Price pursuant to Section 8.5.1, 8.5.2, 8.5.3, 8.5.4,
     8.5.5 or 8.5.6 occurs on or after the "ex" date for the issuance
     or distribution requiring such computation and prior to the day
     in question, the Closing Price for each Trading Day on and after
     the "ex" date for such other event shall be adjusted by
     multiplying such Closing Price by the reciprocal of the fraction
     by which the Conversion Price is so required to be adjusted as a
     result of such other event and (3) if the "ex" date for the
     issuance, distribution or Change of Control requiring such
     computation is prior to the day in question, after taking into
     account any adjustment required pursuant to clause (1) or (2) of
     this proviso, the Closing Price for each Trading Day on or after
     such "ex" date shall be adjusted by adding thereto the amount of
     any cash and the fair market value (as determined by the Board of
     Directors in a manner consistent with any determination of such
     value for purposes of Section 8.5.4 or 8.5.6, whose determination
     shall be conclusive and described in a resolution of such board)
     of the evidences of indebtedness, shares of capital stock or
     assets being distributed applicable to one share of Common Stock
     as of the close of business on the day before such "ex" date. 
     For purposes of any computation under Section 8.5.6, the Current
     Market Price of the Common Stock on any date shall be deemed to
     be the average of the daily Closing Prices per share of Common
     Stock for such day and the next two succeeding Trading Days;
     provided, however, that if the "ex" date for any event (other
     than the tender or exchange offer requiring such computation)
     that requires an adjustment to the Conversion Price pursuant to
     Section 8.5.1, 8.5.2, 8.5.3, 8.5.4, 8.5.5 or 8.5.6 occurs on or
     after the Expiration Time for the tender or exchange offer
     requiring such computation and prior to the day in question, the
     Closing Price for each Trading Day on and after the "ex" date for
     such other event shall be adjusted by multiplying such Closing
     Price by the reciprocal of the fraction by which the Conversion
     Price is so required to be adjusted as a result of such other
     event.  For purposes of this paragraph, the term "ex" date, (1)
     when used with respect to any issuance or distribution, means the
     first date on which the Common Stock trades regular way in the
     relevant exchange or in the relevant market from which the
     Closing Price was obtained without the right to receive such
     issuance or distribution, (2) when used with respect to any
     subdivision or combination of shares of Common Stock, means the
     first date on which the Common Stock trades regular way on such
     exchange or in such market after the time at which such
     subdivision or combination becomes effective and (3) when used
     with respect to any tender or exchange offer means the first date
     on which the Common Stock trades regular way on such exchange or
     in such market after the expiration of such offer. 
     Notwithstanding the foregoing, whenever successive adjustments to
     the Conversion Price are called for pursuant to this Section 8.5,
     such adjustments shall be made to the Current Market Price as may
     be necessary or appropriate to effectuate the intent of this
     Section 8.5 and to avoid unjust or inequitable results as
     determined in good faith by the Board of Directors.

              (3)  "fair market value" shall mean the amount which a
     willing buyer would pay a willing seller in an arm's-length
     transaction.

              (4)  "Record Date" shall mean, with respect to any
     dividend, distribution or other transaction or event in which the
     holders of Common Stock have the right to receive any cash,
     securities or other property or in which the Common Stock (or
     other applicable security) is exchanged for or converted into any
     combination of cash, securities or other property, the date fixed
     for determination of stockholders entitled to receive such cash,
     securities or other property (whether such date is fixed by the
     Board of Directors or by statute, contract or otherwise).

              (5)  "Trading Day" shall mean (x) if the applicable
     security is listed or admitted for trading on the New York Stock
     Exchange or another national security exchange, a day on which
     the New York Stock Exchange or that other national security
     exchange is open for business or (y) if the applicable security
     is quoted on the Nasdaq National Market, a day on which trades
     may be made thereon or (z) if the applicable security is not so
     listed, admitted for trading or quoted, any day other than a
     Saturday or Sunday or a day on which banking institutions in the
     State of New York are authorized or obligated by law or executive
     order to close.

              Section 8.5.8  The Company may make such reductions in
     the Conversion Price, in addition to those required by Sections
     8.5.1, 8.5.2, 8.5.3, 8.5.4, 8.5.5 and 8.5.6 as the Board of
     Directors considers to be advisable to avoid or diminish any
     income tax to holders of Common Stock or rights to purchase
     Common Stock resulting from any dividend or distribution of stock
     (or rights to acquire stock) or from any event treated as such
     for income tax purposes.  To the extent permitted by applicable
     law, the Company from time to time may reduce the Conversion
     Price by any amount for any period of time if the period is at
     least 20 days, the reduction is irrevocable during the period and
     the Board of Directors shall have made a determination that such
     reduction would be in the best interests of the Company, which
     determination shall be conclusive and described in a resolution
     of such board.  Whenever the Conversion Price is reduced pursuant
     to the preceding sentence, the Company shall mail to all holders
     of record of the Series C Preferred Stock a notice of the
     reduction at least 15 days prior to the date the reduced
     Conversion Price takes effect, and such notice shall state the
     reduced Conversion Price and the period it will be in effect.

              Section 8.5.9  No adjustment in the Conversion Price
     shall be required unless such adjustment would require an
     increase or decrease of at least 1% in such price; provided,
     however, that any adjustments which by reason of this Section
     8.5.9 are not required to be made shall be carried forward and
     taken into account in any subsequent adjustment.  All
     calculations under this Section 8 shall be made by the Company
     and shall be made to the nearest cent or to the nearest one one-
     hundredth of a share, as the case may be.

             No adjustment need be made for rights to purchase Common
     Stock pursuant to a Company plan for reinvestment of dividends or
     interest.

             No adjustment need be made for a change in the par value,
     or to or from no par value, of the Common Stock.

             To the extent the Series C Preferred Stock becomes
     convertible into cash, assets, property or securities (other than
     Common Stock of the Company), no adjustment need be made
     thereafter as to the cash, assets, property or such securities
     (except as such securities may otherwise by their terms provide),
     and interest shall not accrue on such cash.

             Section 8.5.10  In any case in which this Section 8.5
     provides that an adjustment shall become effective immediately
     after a Record Date for an event, the Company may defer until the
     occurrence of such event (i) issuing to the holder of any Series
     C Preferred Stock converted after such Record Date and before the
     occurrence of such event the additional shares of Common Stock
     issuable upon such conversion by reason of the adjustment
     required by such event over and above the Common Stock issuable
     upon such conversion before giving effect to such adjustment and
     (ii) paying to such holder any amount in cash in lieu of any
     fraction pursuant to Section 8.3.

             Section 8.6  Effect of Reclassification, Consolidation,
     Merger or Sale.  If any of the following events occur, namely (i)
     any reclassification or change of outstanding shares of Common
     Stock (other than a change in par value, or to or from no par
     value, as a result of a subdivision or combination), (ii) any
     consolidation, merger, or combination of the Company with another
     corporation as a result of which holders of Common Stock shall be
     entitled to receive stock, securities or other property or assets
     (including cash) with respect to or in exchange for such Common
     Stock or (iii) any sale or conveyance of the properties and
     assets of the Company as, or substantially as, an entirety to any
     other corporation as a result of which holders of Common Stock
     shall be entitled to receive stock, securities or other property
     or assets (including cash) with respect to or in exchange for
     such Common Stock, (each of the foregoing being referred to as a
     "Transaction"), each share of Series C Preferred Stock then
     outstanding shall thereafter be convertible into the kind and
     amount of shares of stock and other securities or property or
     assets (including cash) receivable upon such reclassification,
     change, consolidation, merger, combination, sale or conveyance by
     a holder of a number of shares of Common Stock issuable upon
     conversion of such share of Series C Preferred Stock (assuming,
     for such purposes, a sufficient number of authorized shares of
     Common Stock available to convert all such Series C Preferred
     Stock) immediately prior to such reclassification, change,
     consolidation, merger, combination, sale or conveyance, assuming
     each holder of Common Stock did not exercise his rights of
     election, if any, as to the kind or amount of securities, cash or
     other property receivable upon such reclassification, change,
     consolidation, merger, combination, sale or conveyance (provided
     that, if the kind or amount of securities, cash or other property
     receivable upon such reclassification, change, consolidation,
     merger, combination, sale or conveyance is not the same for each
     share of Common Stock in respect of which such rights of election
     shall not have been exercised ("non-electing share"), then for
     the purposes of this Section 8.6 the kind and amount of
     securities, cash or other property receivable upon such
     reclassification, change, consolidation, merger, combination,
     sale or conveyance for each non-electing share shall be deemed to
     be the kind and amount so receivable per share by a plurality of
     the non-electing shares).

             Notwithstanding anything contained herein to the
     contrary, the Company will not effect any Transaction unless,
     prior to the consummation thereof, (i) the Surviving Person
     thereof shall assume, by written instrument mailed to each holder
     of shares of Series C Preferred Stock if such shares are held by
     50 or fewer holders or groups of affiliated holders or to each
     Transfer Agent for the shares of Series C Preferred Stock if such
     shares are held by a greater number of holders, the obligation to
     deliver to such holder such stock, securities or other property
     or assets (including cash) with respect to or in exchange for
     Common Stock to which, in accordance with the foregoing
     provisions, such holder is entitled and (ii) proper provision is
     made to ensure that the holders of shares of Series C Preferred
     Stock will be entitled to receive the benefits afforded by
     Section 8.6.  Such written instrument should provide for
     adjustments which shall be as nearly as equivalent as may be
     practicable to the adjustments provided for in this Section 8.6.

             The above provisions of this Section shall similarly
     apply to successive reclassifications, changes, consolidations,
     mergers, combinations, sales and conveyances.  

             If this Section 8.6 applies to any event or occurrence,
     Section 8.5 shall not apply.

             Section 8.7  Transfer or Similar Taxes on Shares Issued. 
     The issue of stock certificates on conversions of Series C
     Preferred Stock shall be made without charge to the converting
     holder of Series C Preferred Stock for any transfer or similar
     tax in respect of the issue thereof.  The Company shall not,
     however, be required to pay any such tax which may be payable in
     respect of any transfer involved in the issue and delivery of
     stock in any name other than that of the holder of any Series C
     Preferred Stock converted, and the Company shall not be required
     to issue or deliver any such stock certificate unless and until
     the person or persons requesting the issue thereof shall have
     paid to the Company the amount of such tax or shall have
     established to the satisfaction of the Company that such tax has
     been paid.

             Section 8.8  Reservation of Shares; Shares to Be Fully
     Paid; Listing of Common Stock.  The Company shall provide, free
     from preemptive rights, out of its authorized but unissued shares
     or shares held in treasury, sufficient shares to provide for the
     conversion of the Series C Preferred Stock from time to time as
     such Series C Preferred Stock is presented for conversion.

             Before taking any action which would cause an adjustment
     reducing the Conversion Price below the then par value, if any,
     of the shares of Common Stock issuable upon conversion of the
     Series C Preferred Stock, the Company will take all corporate
     action which may, in the opinion of its counsel, be necessary in
     order that the Company may validly and legally issue shares of
     such Common Stock at such adjusted Conversion Price.

             The Company covenants that all shares of Common Stock
     which may be issued upon conversion of Series C Preferred Stock
     will, upon issue, be fully paid and nonassessable by the Company
     and free from all transfer or similar taxes as described in
     Section 8.7, liens and charges with respect to the issue thereof.

             The Company further covenants that, if at any time the
     Common Stock shall be listed on the New York Stock Exchange or
     any other national securities exchange, the Company will, if
     permitted by the rules of such exchange, list and keep listed, so
     long as the Common Stock shall be so listed on such exchange, all
     Common Stock issuable upon conversion of the Series C Preferred
     Stock.

             Section 8.9  Notice to Stockholders Prior to Certain
     Actions.  In case:

          (a)  the Company makes any distribution or dividend that
     would require an adjustment in the Conversion Price pursuant to
     Section 8.5; or

          (b)  the Company takes any action that would result in a
     Transaction as defined in Section 8.6; or

          (c)  of the voluntary or involuntary dissolution,
     liquidation or winding-up of the Company,

     the Company shall cause to be mailed to each holder of Series C
     Preferred Stock at his address appearing on the books of the
     Company, as promptly as possible but in any event at least 15
     days prior to the applicable date hereinafter specified, a notice
     stating (x) the date on which a record date is to be taken for
     the purpose of such dividend, distribution, rights or warrants,
     or, if a record is not to be taken, the date as of which the
     holders of Common Stock of record to be entitled to such
     dividend, distribution, rights or warrants are to be determined
     or (y) the date on which such reclassification, change,
     consolidation, merger, sale, conveyance, transfer, dissolution,
     liquidation or winding-up is expected to become effective or
     occur and the date as of which it is expected that holders of
     record of Common Stock shall be entitled to exchange their Common
     Stock for securities or other property deliverable upon such
     reclassification, change consolidation, merger, sale, conveyance,
     transfer, dissolution, liquidation or winding-up.  Failure to
     give such notice, or any defect therein, shall not affect the
     legality or validity of such dividend, distribution,
     reclassification, change, consolidation, merger, sale,
     conveyance, transfer, dissolution, liquidation or winding-up. 
     Neither the failure to give such notice nor any defect therein
     shall affect the legality or validity of the proceedings
     referenced in clauses (a) through (c) of this Section 8.9.

               Section 9.  Reports as to Adjustments.  Upon any
     adjustment of the Conversion Price then in effect and any
     increase or decrease in the number of shares of Common Stock
     issuable upon the operation of the conversion set forth in
     Section 8, then, and in each such case, the Company shall
     promptly deliver to the Transfer Agent for the Series C Preferred
     Stock and the Transfer Agent for the Common Stock, a certificate
     signed by the President or a Vice President and by the Treasurer
     or an Assistant Treasurer or the Secretary or an Assistant
     Secretary of the Company setting forth in reasonable detail the
     event requiring the adjustment and the method by which such
     adjustment was calculated and specifying the Conversion Price
     then in effect following such adjustment and the increased or
     decreased number of shares issuable upon the conversion set forth
     in Section 8.  The Company shall also promptly after the making
     of such adjustment give written notice to the registered holders
     of the Series C Preferred Stock at the address of each holder as
     shown on the books of the Company maintained by the Transfer
     Agent thereof, which notice shall state the Conversion Price then
     in effect, as adjusted, and the increased or decreased number of
     shares issuable upon the exercise of the right of conversion
     granted by Section 8, and shall set forth in reasonable detail
     the method of calculation of each with a brief statement of the
     facts requiring such adjustment.  Where appropriate, such notice
     to holders of the Series C Preferred Stock may be given in
     advance and included as part of the notice required under the
     provisions of Section 8.9.

               Section 10.  Certain Covenants.  Any registered holder
     of Series C Preferred Stock may proceed to protect and enforce
     its rights and the rights of such holders by any available remedy
     by proceeding at law or in equity to protect and enforce any such
     rights, whether for the specific enforcement of any provision in
     this Certificate of Designation or in aid of the exercise of any
     power granted herein, or to enforce any other proper remedy.

               Section 11.  Definitions.  For the purposes of this
     Certificate of Designation of Series C Preferred Stock, the
     following terms shall have the meanings indicated:

               "Acquisition Prices" shall mean the volume weighted
     average of the per share prices paid by a specified person or
     group in acquiring Voting Stock.

               "Affiliate" and "Associate" shall have the respective
     meanings ascribed to such terms in Rule 12b-2 of the General
     Rules and Regulations under the Exchange Act.

               "Business Day" shall mean a day, other than a Saturday,
     a Sunday or other day on which the banking institutions in the
     State of New York, the State of California or the Commonwealth of
     Massachusetts are authorized or obligated by law or executive
     order to close or a day which is declared a national or New York,
     California or Massachusetts state holiday.

               "Change in Control" shall mean an event or series of
     events pursuant to which (i) any "person" or "group" (as such
     terms are used in Sections 13(d) and 14(d) of the Exchange Act)
     acquires beneficial ownership (as determined in accordance with
     Rule 13d-3 under the Exchange Act), directly or indirectly, of
     more than 50% of the total Voting Stock of the Company at an
     Acquisition Price less than the Conversion Price then in effect
     with respect to the Series C Preferred Stock and (ii) holders of
     Common Stock receive consideration which is not all or
     substantially all common stock that is (or upon consummation of
     or immediately following such event or events will be) listed on
     a United States national securities exchange or approved for
     quotation on the Nasdaq National Market or any similar United
     States system of automated dissemination of quotations of
     securities prices; provided, however, that any such person or
     group shall not be deemed to be the beneficial owner of, or to
     beneficially own, any Voting Stock tendered into a tender offer
     until such tendered Voting Stock is accepted for purchase under
     the tender offer.

               Commission:  The term "Commission" shall mean the
     Securities and Exchange Commission.

               Company:  The term "Company" shall mean SoftKey
     International Inc., a Delaware corporation.

               Conversion Price:  The term "Conversion Price" shall
     have the meaning specified in Section 8.4.

               Exchange Act:  The term "Exchange Act" means the
     Securities Exchange Act of 1934, as amended, and the rules and
     regulations promulgated thereunder.

               Junior Stock:  The term "Junior Stock" shall have the
     meaning set forth in Section 3.2.

               Parity Stock:  The term "Parity Stock" shall have the
     meaning set forth in Section 3.4.5.

               person:  The terms "person" shall mean a corporation,
     an association, a partnership, an individual, a joint venture, a
     joint stock company, a trust, an unincorporated organization or a
     government or an agency or a political subdivision thereof.

               subsidiary:  The term "subsidiary" of any specified
     person shall mean (i) a corporation a majority of whose capital
     stock with voting power under ordinary circumstances, to elect
     directors is at the time directly or indirectly owned by such
     person or (ii) any other person (other than a corporation) in
     which such person or a subsidiary or subsidiaries of such person
     directly or indirectly, at the date of determination thereof, has
     at least majority ownership.

               Surviving Person shall mean the continuing or surviving
     person of a merger, consolidation or other corporate combination,
     the person receiving a transfer of all or substantially all of
     the properties and assets of the Company, or the person
     consolidating with or merging into the Company in a merger,
     consolidation or other combination in which the Company is the
     continuing or surviving person, but in connection with which
     Series C Preferred Stock or Common Stock of the Company is
     exchanged, converted or reinstated into the securities of any
     other person or cash or any other property.

               Voting Stock:  The term "Voting Stock" means stock of
     the class or classes pursuant to which the holders thereof have
     the general voting power under ordinary circumstances to elect at
     least a majority of the board of directors, managers or trustees
     of a corporation (irrespective of whether or not at the time
     stock of any other class or classes shall have or might have
     voting power by reason of the happening of any contingency).