SECURITIES PURCHASE AGREEMENT




                                     Between




                          TRIBUNE COMPANY, as Purchaser




                                       and




                     SOFTKEY INTERNATIONAL, INC., as Issuer





                          Dated as of November 30, 1995






              5 1/2% Senior Convertible/Exchangeable Notes due 2000



                          $150,000,000 Principal Amount










                                                                           Page

                                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



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                                                                           Page

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




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                          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  hereto  fore
authorized the issuance and sale to the Purchaser  pursuant to this Agreement of
the  Company's  5 1/2%  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 5 1/2% Senior Convertible Notes due 2000 (the "Old Notes"). The shares
of the  Company's 5 1/2%  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 "Clos
ing") of the purchase and sale of the Notes contemplated hereby
shall take place on such date and at such time as agreed to by

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the Company and the Purchaser and upon which all of the condi tions 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:

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                  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.


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                  (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.

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(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

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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

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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

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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

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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

93610.01
                                      - 9 -





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

93610.01
                                     - 10 -





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

93610.01
                                     - 11 -





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

93610.01
                                     - 12 -





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  securi  ties  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 trans  actions  contemplated  hereby and to comply  with the
terms, conditions and provisions hereof.

                  The execution,  delivery and performance of this Agree ment by
the Purchaser has been duly authorized and approved by the Purchaser's  Board of
Directors  and does not  require  any fur ther  authorization  or consent of the
Purchaser or its stock holders.  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 inden ture, 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  author  ity,  except  for  filings  under the
Securities Act, the Exchange Act and the HSR Act.




93610.01
                                     - 13 -





                                    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

93610.01
                                     - 14 -





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

93610.01
                                     - 15 -





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  substan  tially in the
following form (in addition to the legend  required  under any applicable  state
securities laws):

                  THE [SHARES]  [NOTE]  REPRESENTED  BY THIS CERTIFI CATE [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 THERE FROM 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

93610.01
                                     - 16 -





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 con trary,
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;


93610.01
                                     - 17 -





                  (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 par ties 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

93610.01
                                     - 18 -





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  express  ly
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 counter part,  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

93610.01
                                     - 19 -





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.



93610.01
                                     - 20 -





                  IN WITNESS  WHEREOF,  each of the  undersigned  has caused the
foregoing Agreement to be executed by one of its duly author ized 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

93610.01
                                     - 21 -















                           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

























                                      -118-
0093773.0 1





                                TABLE OF CONTENTS



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

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

ARTICLE II - ISSUE, DESCRIPTION, EXECUTION, REGISTRATION
         AND 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


                                       -i-
0093773.0 1





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

                                      -ii-
0093773.0 1






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

                                      -iii-
0093773.0 1





         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

                                      -iv-
0093773.0 1




         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









                                       -v-
0093773.0 1





                  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:



0093773.0 1





                                    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.


                                       -2-
0093773.0 1





                  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.


                                       -3-
0093773.0 1





                  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.


                                       -4-
0093773.0 1





                  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.

                                       -5-
0093773.0 1





                  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

                                       -6-
0093773.0 1





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

                                       -7-
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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

                                       -8-
0093773.0 1





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

                                       -9-
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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.


                                      -10-
0093773.0 1





                  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

                                      -11-
0093773.0 1





(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

                                      -12-
0093773.0 1





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

                                      -13-
0093773.0 1





                  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.

                                      -14-
0093773.0 1





                  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,

                                      -15-
0093773.0 1





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

                                      -16-
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                  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

                                      -17-
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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,

                                      -18-
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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,

                                      -19-
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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

                                      -20-
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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

                                      -21-
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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.


                                      -22-
0093773.0 1





                  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

                                      -23-
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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.





                                      -24-
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                                   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

                                      -25-
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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.

                                      -26-
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                  (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).


                                      -27-
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                  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

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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

                                      -29-
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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

                                      -30-
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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

                                      -31-
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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

                                      -32-
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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

                                      -33-
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         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

                                      -34-
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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.


                                      -35-
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                  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

                                      -36-
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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;

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                           (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

                                      -38-
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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

                                      -39-
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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

                                      -40-
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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.


                                      -41-
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                  (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

                                      -42-
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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

                                      -43-
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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

                                      -44-
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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.

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                  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

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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

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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;

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                  (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

                                      -49-
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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

                                      -50-
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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

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                  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

                                      -52-
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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.

                                      -53-
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                  (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

                                      -54-
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         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

                                      -55-
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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

                                      -56-
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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

                                      -57-
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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

                                      -58-
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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

                                      -59-
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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

                                      -60-
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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.


                                      -61-
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                  (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

                                      -62-
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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

                                      -63-
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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

                                      -64-
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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

                                      -65-
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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

                                      -66-
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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,

                                      -67-
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         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

                                      -68-
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         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

                                      -69-
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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

                                      -70-
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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.


                                      -71-
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                  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

                                      -72-
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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

                                      -73-
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         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

                                      -74-
0093773.0 1





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

                                      -75-
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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

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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.


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                                  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

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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

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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

                                      -80-
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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

                                      -81-
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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,

                                      -82-
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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

                                      -83-
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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

                                      -84-
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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.


                                      -85-
0093773.0 1






                  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:


- -----------------------



                                      -86-
0093773.0 1





                       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

                                      -87-
0093773.0 1





         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

                                      -88-
0093773.0 1





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


                                      -89-
0093773.0 1






                     [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

                                      -90-
0093773.0 1





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.


                                      -91-
0093773.0 1





                  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

                                      -92-
0093773.0 1





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.



                                      -93-
0093773.0 1






                                                         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.












                                      -94-
0093773.0 1






                           [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





                                      -95-
0093773.0 1







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) $___________________






                                      -96-
0093773.0 1





                            [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



                                      -97-
0093773.0 1





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) $______________






                                      -98-
0093773.0 1





                       [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):
                                                       $-------------------










                                      -99-
0093773.0 1







                              (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

                                      -100-
0093773.0 1





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.

                                      -101-
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                         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

                                      -102-
0093773.0 1





         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

                                      -103-
0093773.0 1





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

                                      -104-
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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


                                      -105-
0093773.0 1





                      [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






                                      -106-
0093773.0 1





                            [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

                                      -107-
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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.



                                      -108-
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                     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

                                      -109-
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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

                                      -110-
0093773.0 1





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.




                                      -111-
0093773.0 1






                           [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





                                      -112-
0093773.0 1







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) $___________________






                                      -113-
0093773.0 1





                            [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




                                      -114-
0093773.0 1







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) $___________________






                                      -115-
0093773.0 1







                       [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): $__________________









                                      -116-
0093773.0 1







                                    EXHIBIT C

                                    [FORM OF
                           CERTIFICATE OF DESIGNATION]


                                      -117-
0093773.0 1








                                                                      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

93845.01
                                      - 1 -





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

93845.01
                                      - 2 -





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

93845.01
                                      - 3 -





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

93845.01
                                      - 4 -





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

93845.01
                                      - 5 -





         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

93845.01
                                      - 6 -





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

93845.01
                                      - 7 -





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

93845.01
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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

93845.01
                                      - 9 -





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

93845.01
                                     - 10 -





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

93845.01
                                     - 11 -





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

93845.01
                                     - 12 -





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

93845.01
                                     - 13 -





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,

93845.01
                                     - 14 -





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.


93845.01
                                     - 15 -





                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,

93845.01
                                     - 16 -





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

93845.01
                                     - 17 -





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

93845.01
                                     - 18 -





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

93845.01
                                     - 19 -





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

93845.01
                                     - 20 -





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

93845.01
                                     - 21 -





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

93845.01
                                     - 22 -





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

93845.01
                                     - 23 -





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

93845.01
                                     - 24 -





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.

93845.01
                                     - 25 -





               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:


93845.01
                                     - 26 -





         (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

93845.01
                                     - 27 -





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

93845.01
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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

93845.01
                                     - 29 -




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).



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