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                                                                    EXHIBIT 10.5


                                     LEASE

       LANDLORD:         Teachers Realty Corporation
       
       
       
       TENANT:           Voicetek Corporation
       
       
       
       PREMISES:         19 Alpha Road 
                         Chelmsford, Massachusetts
       
       
       DATED:            As of May  25, 1993
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                                TABLE OF CONTENTS




ARTICLE CAPTION                                                                   PAGE
                                                                            
I.     BASIC LEASE PROVISIONS                                                     1

         1.1  Introduction                                                        1
         1.2  Basic Data                                                          1
         1.3  Additional Definitions                                              2

II.    PREMISES AND APPURTENANT RIGHTS                                            3

         2.1  Lease of Premises                                                   3
         2.2  Appurtenant Rights and Reservations                                 3

III.   BASIC RENT                                                                 4

         3.1  Payment                                                             4

IV.    COMMENCEMENT AND CONDITION                                                 5

         4.1  Commencement Date                                                   5
         4.2  Condition of the Premises                                           5

V.     USE OF PREMISES                                                            5

         5.1  Permitted Use                                                       5
         5.2  Installation and Alterations by Tenant                              6

VI.    ASSIGNMENT AND SUBLETTING                                                  9

         6.1  Prohibition                                                         9

VII.   RESPONSIBILITY FOR REPAIRS AND CONDITIONS                                  10
         OF PREMISES; SERVICES TO BE FURNISHED BY LANDLORD

         7.1  Landlord Repairs                                                    10
         7.2  Tenant's Agreement                                                  11
         7.3  Floor Load - Heavy Machinery                                        12
         7.4  Building Services                                                   12
         7.5  Electricity                                                         13

VIII.  REAL ESTATE TAXES                                                          17
 
         8.1  Payments on Account of Real                                         17
              Estate Taxes 
         8.2  Abatement                                                           18
         8.3  Alternate Taxes                                                     18


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                              ARTICLE CAPTION                                   PAGE

                                                                         
IX.   OPERATING EXPENSES                                                        18

       9.1 Definitions                                                          18
       9.2 Tenant's Payments                                                    19

X.    INDEMNITY AND PUBLIC LIABIITY INSURANCE                                   20

       10.1 Tenant's Indemnity                                                  20
       10.2 Public Liability Insurance                                          21
       10.3 Tenant's Risk                                                       21
       10.4 Injury Caused by Third Parties                                      22

XI.   LANDLORD'S ACCESS TO PREMISES                                             22

       11.1 Landlord's Rights                                                   22

XII.  FIRE, EMINENT DOMAIN, ETC.                                                22

       12.1 Abatement of Rent                                                   22
       12.2 Landlord's Right of Termination                                     23
       12.3 Restoration                                                         23
       12.4 Award                                                               23

XIII. DEFAULT                                                                   24

       13.1 Tenant's Default                                                    24
       13.2 Landlord's Default                                                  27

XIV.  MISCELLANEOUS PROVISIONS                                                  27

       14.1  Extra Hazardous Use                                                27
       14.2  Waiver                                                             28
       14.3  Covenant of Quiet Enjoyment                                        28
       14.4  Landlord's Liability                                               28
       14.5  Notice to Mortgagee or Ground Lessor                               29
       14.6  Assignment of Rents and Transfer                                   30
             of Title                                                           
       14.7  Rules and Regulations                                              30
       14.8  Additional Charges                                                 31
       14.9  Invalidity of Particular Provisions                                31
       14.10 Provisions Binding, Etc.                                           31
       14.11 Recording                                                          31
       14.12 Notices                                                            31
       14.13 When Lease Becomes Binding                                         32
       14.14 Paragraph Headings                                                 32
       14.15 Rights of Mortgagee or                                             32
             Ground Lessor                                                      
       14.16 Status Report                                                      33
       14.17 Security Deposit                                                   33

                                                                                
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                                   ARTICLE CAPTION                              PAGE
                                                                          
       14.18 Remedying Defaults                                                  34
       14.19 Holding Over                                                        34
       14.20 Waiver of Subrogation                                               34
       14.21 Surrender of Premises                                               35
       14.22 Substitute Space                                                    35
       14.23 Brokerage                                                           35
       14.24 Special Taxation Provisions                                         35
       14.25 Hazardous Materials                                                 36
       14.26 Governing Law                                                       37


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                                   L E A S E

                                    Preamble

THIS INSTRUMENT IS A LEASE, dated as of May 25, 1993 in which the Landlord and
the Tenant are the parties hereinafter named, and which relates to space in the
building (the "Building") known and numbered as 19 Alpha Road, Chelmsford,
Massachusetts. The parties to this instrument hereby agree with each other as
follows:

                                    ARTICLE I

                             BASIC LEASE PROVISIONS

1.1          INTRODUCTION. The following terms and provisions set forth basic
             data and, where appropriate, constitute definitions of the terms
             hereinafter listed:

1.2          BASIC DATA.

             Landlord:    Teachers Realty Corporation

             Landlord's Original Address: 
                     c/o Finard & Company, Inc.  
                     Three Burlington Woods Drive 
                     Burlington, MA 01803

             Tenant: Voicetek Corporation, a Massachusetts corporation

             Tenant's Original Address: 19 Alpha Road, Chelmsford, MA 01824

             Guarantor:  N/A

             Basic Rent: The sum of $89,464.50 ($4.50 per square foot of
             Premises Rentable Area) per annum.

             Premises Rentable Area: Approximately 19,881 square feet.

             Permitted Uses: Office and light manufacturing, but specifically
             excluding any use which would cause any portion of the Premises to
             be deemed a "place of public accommodation" as defined in the
             Americans with Disabilities Act of 1990, as amended.

             Escalation Factor: 32.57%, as computed in accordance with the
             Escalation Factor Computation.

             Initial Term: Three (3) years commencing on the Commencement Date
             and expiring at the close of the day immediately preceding the
             third anniversary of the
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             Commencement Date, except that if the Commencement Date shall be
             other than the first day of a calendar month the expiration of the
             Initial Term shall be at the close of the day on the last day of
             the calendar month on which such anniversary date shall fall.

             Security Deposit: $22,366.12.

1.3          ADDITIONAL DEFINITIONS.

             Manager: Finard & Company, Inc.

             Building Rentable Area: 64,250 rentable square feet.

             Business Days: All days except Saturday, Sunday, New Year's Day,
             Washington's Birthday, Patriot's Day, Memorial Day, Independence
             Day, Labor Day, Columbus Day, Veterans' Day, Thanksgiving Day,
             Christmas Day (and the following day when any such day occurs on
             Sunday).

             Commencement Date: As defined in Section 4. 1.

             Default of Tenant: As defined in Section 13.1.

             Escalation Charges: The amounts prescribed in Sections 8.1 and 9.2.

             Escalation Factor Computation: Premises Rentable Area divided by
             95% of the Building Rentable Area.

             Force Majeure: Collectively and individually, strike or other labor
             trouble, fire or other casualty, governmental preemption of
             priorities or other controls in connection with a national or other
             public emergency or shortages of, or inability to obtain, fuel,
             supplies or labor resulting therefrom, or any other cause, whether
             similar or dissimilar, beyond Landlord's reasonable control.

             Initial Public Liability Insurance: $1,000,000 per person;
             $3,000,000 per occurrence (combined single limit) for property
             damage, bodily injury or death.

             Operating Expenses: As set forth in Section 9.1.

             Operating Year: As defined in Section 9.1.

             Premises: A portion of the Building as shown on Exhibit A annexed
             hereto.

             Property: The Building and the land parcels on which it is located
             (including adjacent sidewalks). 

             Tax Year: As defined in Section 8.1.

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             Taxes: As determined in accordance with Section 8. 1.

             Tenants Removable Property: As defined in Section 5.2. 

             Term of this Lease: The Initial Term and any extension thereof in
             accordance with the provisions hereof.

             Utility Expenses: As defined in Section 9.1.

             Exhibits: The following Exhibits are annexed to this Lease and
             incorporated herein by this reference:

             Exhibit A  - Plan showing Premises
             Exhibit B  - Plan Showing location of "new loading dock area"
             Exhibit C  - Rules and Regulations
             Exhibit D  - Intentionally Omitted
             Exhibit E  - Operating Expenses
             Exhibit F  - Tenant's Janitorial Specifications

                                   ARTICLE II

                        PREMISES AND APPURTENANT RIGHTS.

2.1          LEASE OF PREMISES. Landlord hereby demises and leases to Tenant for
             the Term of this Lease and upon the terms and conditions
             hereinafter set forth, and Tenant hereby accepts from Landlord, the
             Premises.

2.2          APPURTENANT RIGHTS AND RESERVATIONS. (a) Tenant shall have, as
             appurtenant to the Premises, the non-exclusive right to use, and
             permit its invitees to use in common with others, public or common
             lobbies, hallways, and common walkways necessary for access to the
             Building, and if the portion of the Premises on any floor includes
             less than the entire floor, the common toilets, corridors and
             elevator lobby of such floor; but Tenant shall have no other
             appurtenant rights and all such rights shall always be subject to
             reasonable rules and regulations from time to time established by
             Landlord pursuant to Section 14.7 and to the right of Landlord to
             designate and change from time to time areas and facilities so to
             be used.

             (b) Excepted and excluded from the Premises are the ceiling, floor,
             perimeter walls and exterior windows, except the inner surfaces
             thereof, but the entry doors (and related glass and finish work) to
             the Premises are a part thereof; and Tenant agrees that Landlord
             shall have the right to place in the Premises (but in such manner
             as to reduce to a minimum interference with Tenant's use of the
             Premises) interior storm windows, subcontrol devices (by way of
             illustration, an electric sub panel, etc.), utility lines, pipes,
             equipment and the like, in, over

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             and upon the Premises. Tenant shall install and maintain, as
             Landlord may require, proper access panels in any hung ceilings or
             walls as may be installed by Tenant in the Premises to afford
             access to any facilities above the ceiling or within or behind the
             walls.

                                   ARTICLE III

                                   BASIC RENT

3.1          PAYMENT. (a) Tenant agrees to pay to Landlord, or as directed by
             Landlord, commencing on the Commencement Date without offset,
             abatement, deduction or demand, the Basic Rent and the monthly
             installment of the Reimbursement Rent. Such Basic Rent shall be
             payable in equal monthly installments, in advance, on the first day
             of each and every calendar month during the Term of this Lease, at
             Landlord's Original Address, or at such other place as Landlord
             shall from time to time designate by notice to Tenant, in lawful
             money of the United States. In the event that any installment of
             Basic Rent is not paid when due, Tenant shall pay, in addition to
             any Escalation Charges or other additional charges due under this
             Lease, an administrative fee equal to 5% of the overdue payment.

             (b) Basic Rent for any partial month shall be pro-rated on a daily
             basis, and if the first day on which Tenant must pay Basic Rent
             shall be other than the first day of a calendar month, the first
             payment which Tenant shall make to Landlord shall be equal to a
             proportionate part of the monthly installment of Basic Rent for the
             partial month from the first day on which Tenant must pay Basic
             Rent to the last day of the month in which such day occurs, plus
             the installment of Basic Rent for the succeeding calendar month.

             (c) As an Additional Charge hereunder, Tenant hereby covenants and
             agrees to pay the Landlord the amount of $25,000.00 over the three
             year Initial Term of this Lease (the "Reimbursement Rent"). The
             Reimbursement Rent represents payment of back due rents payable to
             Landlord as the result of use and occupancy of the Premises by
             Tenant, which amounts have been earned and are presently due and
             owing to Landlord notwithstanding any expiration or earlier
             termination of this Lease. The Reimbursement Rent shall be payable
             to Landlord as and when payments of Basic Rent are due and payable
             hereunder without offset, deduction, abatement or demand. The
             Reimbursement Rent shall be paid to Landlord in equal monthly
             installments of $694.44. Landlord shall have the same rights and
             remedies against Tenant for failure to pay any monthly installment
             of Reimbursement Rent as Landlord has against

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             Tenant for failure to pay Basic Rent when due, including, without
             limitation, all sums and charges prescribed in Section 14.18 of the
             Lease, the 5% administrative fee payable pursuant to the last
             sentence of Section 3.1(a) hereof and all rights and remedies
             reserved unto Landlord pursuant to Article XIII of this Lease.

                                   ARTICLE IV

                           COMMENCEMENT AND CONDITION


4.1          COMMENCEMENT DATE. The Commencement Date shall be the Date of
             execution of this Lease by the last party executing this Lease as
             evidenced on the signature page hereof.

4.2          CONDITION OF THE PREMISES. Tenant hereby acknowledges and agrees to
             accept the Premises on the Commencement Date in its then "as is"
             condition without representation or warranty of Landlord of any
             kind, either express or implied. Tenant is currently occupying the
             Premises under certain other arrangements with Landlord and
             therefore it is agreed and understood that Landlord shall not be
             required to make or pay for any improvements to the Premises at or
             prior to the Commencement Date. Notwithstanding the foregoing to
             the contrary, Landlord hereby agrees to demise the Premises from
             the immediately adjacent and currently vacant space and to cut an
             opening in the exterior wall of the building and install one 8'x8'
             overhead roll-up door in that portion, of the Premises identified
             as the "new loading dock area" on Exhibit B to this Lease. It is
             agreed and understood that the work required to be performed by
             Landlord hereunder may be performed after the Commencement Date and
             Tenant agrees to allow Landlord's contractor to enter the Premises
             for completing such work.

                                    ARTICLE V

                                 USE OF PREMISES

5.1          PERMITTED USE. (a) Tenant agrees that the Premises shall be
             used and occupied by Tenant only for Permitted Uses.

             (b) Tenant agrees to conform to the following provisions during the
             Term of this Lease:

                       (i) Tenant shall cause all freight to be delivered to or
             removed from the Building and the Premises in

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             accordance with reasonable rules and regulations established by
             Landlord therefor;

                       (ii) Tenant will not place on the exterior of the
             Premises (including both interior and exterior surfaces of doors
             and interior surfaces of windows) or on any part of the Building
             outside the Premises, any signs, symbol, advertisements or the like
             visible to public VIEW outside of the Premises. Landlord will not
             unreasonably withhold consent for signs or lettering on the entry
             doors to the Premises provided such signs conform to building
             standards adopted by Landlord and Tenant has submitted a sketch of
             the sign to be placed on such entry doors.

                       (iii) Tenant shall not perform any act or carry on any
             practice which may injure the Premises, or any other part of the
             Building, or cause offensive odors or loud noise or constitute a
             nuisance or menace to any other tenant or tenants or other persons
             in the Building;

                       (iv) Tenant shall, in its use of the Premises., comply
             with the requirements of all applicable governmental laws, rules
             and regulations including, without limitation, the Americans with
             Disabilities Act of 1990, as amended; and

                       (v) Tenant shall continuously throughout the Term of this
             Lease occupy the Premises for the Permitted Uses and for no other
             purposes.

5.2          INSTALLATION AND ALTERATIONS BY TENANT. (a) Tenant shall make no
             alterations, additions (including, for the purposes hereof,
             wall-to-wall carpeting), or improvements in or to the Premises
             without Landlord's prior written consent. Any such alterations,
             additions or improvements shall (i) be in accordance with complete
             plans and specifications prepared by Tenant and approved in advance
             by Landlord; (ii) be performed in a good and workmanlike manner and
             in compliance with all applicable laws; (iii) be performed and
             completed in the manner required in Section 5.2(d) hereof; (iv) be
             made at Tenant's sole expense and at such times as Landlord may 
             from time to time designate; and (v) become a part of the Premises 
             and the property of Landlord. It is agreed and understood that 
             Landlord shall have the right to review and approve all changes 
             to any plans which Landlord shall have approved pursuant to this 
             Section 5.2(a). It is also agreed and understood that Landlord 
             shall not be deemed to be unreasonable in denying its consent to 
             alterations, additions and improvements to the Premises which 
             affect "Base Building Systems" (as said term is hereafter defined).

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             As used herein, the term "Base Building Systems" shall mean (i) any
             mechanical, electrical or plumbing system or component of the
             Building (including the Premises) (ii) the exterior of the Building
             (iii) the Building HVAC distribution system (iii) any fire safety
             prevention/suppression system and (iv) any structural element or
             component of the Building.

             (b) All articles of personal property and all business fixtures,
             machinery and equipment and furniture owned or installed by Tenant
             solely at its expense in the Premises ("Tenant's Removable
             Property") shall remain the property of Tenant and may be removed
             by Tenant at any time prior to the expiration of this Lease,
             provided that Tenant, at its expense, shall repair any damage to
             the Building caused by such removal.

             (c) Notice is hereby given that Landlord shall not be liable for
             any labor or materials furnished or to be furnished to Tenant upon
             credit, and that no mechanic's or other lien for any such labor or
             materials shall attach to or affect the reversion or other estate
             or interest of Landlord in and to the Premises. Whenever and as
             often as any mechanic's lien shall have been filed against the
             Premises based upon any act or interest of Tenant or of anyone
             claiming through Tenant, Tenant shall forthwith take such actions
             by bonding, deposit or payment as will remove or satisfy the lien.

             (d) All of the Tenant's alterations, additions and installation of
             furnishings shall be coordinated with any work being performed by
             Landlord and in such manner as to maintain harmonious labor
             relations and not damage the Property or interfere with Building
             construction or operation and, except for installation of
             furnishings, shall be performed by Landlord's general contractor
             or, at Landlord's election, by contractors or workmen first
             approved by Landlord. Installation and moving of furnishings,
             equipment and the like shall be performed only with labor
             compatible with that being employed by Landlord for work in or to
             the Building and not to employ or permit the use of any labor or
             otherwise take any action which might result in a labor dispute
             involving personnel providing services in the Building. Except for
             work by Landlord's general contractor, Tenant before its work is
             started shall: secure all licenses and permits necessary therefor;
             deliver to Landlord a statement of the names of all its contractors
             and subcontractors and the estimated cost of all labor and material
             to be furnished by them; and cause each contractor to carry
             workmen's compensation insurance in statutory amounts covering all
             the contractor's and subcontractor's employees and comprehensive
             public liability insurance and property damage insurance with such
             limits as

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             Landlord may reasonably require but in no event less than a
             combined single limit of Two Million and No/100ths ($2,000,000.00)
             Dollars (all such insurance to be written in companies approved by
             Landlord and insuring Landlord and Tenant as well as the
             contractors), and to deliver to Landlord certificates of all such
             insurance. Tenant agrees to pay promptly when due the entire cost
             of any work done on the Premises by Tenant, its agents, employees,
             or independent contractors, and not to cause or permit any liens
             for labor or materials performed or furnished in connection
             therewith to attach to the Premises or the Property and immediately
             to discharge any such liens which may so attach and, at the request
             of Landlord to deliver to Landlord security satisfactory to
             Landlord against liens arising out of the furnishing of such labor
             and material. Upon completion of any work done on the Premises by
             Tenant, its agents, employees, or independent contractors, Tenant
             shall promptly deliver to Landlord original lien releases and
             waivers executed by each contractor, subcontractor, supplier,
             materialmen, architect, engineer or other party which furnished
             labor, materials or other services in connection with such work and
             pursuant to which all liens, claims and other rights of such party
             with respect to labor, material or services furnished in connection
             with such work are unconditionally released and waived. Tenant
             shall pay within fourteen (14) days after being billed therefor by
             Landlord, as an additional charge hereunder, one hundred percent
             (100%) of any increase in real estate taxes on the Property not
             otherwise billed to Tenant which shall, at any time after
             commencement of the Term, result from any alteration, addition or
             improvement to the Premises made by or on behalf of Tenant
             (including Tenant's original installation and Tenant's subsequent
             alterations, additions, substitutions and improvements), whether
             done prior to or after the commencement of the Term of this Lease.

             (e) In connection with the performance of any alterations,.
             improvements, changes or additions to the Premises as contemplated
             by Article IV or Section 5.2 of this Lease, in the event that any
             such improvement, alteration, change or addition to the Premises to
             be performed by Tenant ("Work') affects so-called "Base Building
             Building Systems" and to the extent that such Work is not performed
             by Landlord or a general contractor employed directly by Landlord,
             Tenant hereby agrees to use the services of a construction
             management firm designated by Landlord to oversee, coordinate and
             review all aspects of any such Work. The cost and expense of the
             services of such construction manager shall be borne by Tenant but
             only to the extent that such costs and expenses are comparable to
             and competitive with the costs and expenses charged by other firms
             engaged in

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             construction management and oversight services in the general
             geographic location of the Building for services of a similar scope
             and type.


                                   ARTICLE VI

                            ASSIGNMENT AND SUBLETTING


6.1          PROHIBITION. (a) Tenant covenants and agrees that whether
             voluntarily, involuntarily, by operation of law or otherwise,
             neither this Lease nor the term and estate hereby granted, nor any
             interest herein or therein, will be assigned, mortgaged, pledged,
             encumbered or otherwise transferred and that neither the Premises
             nor any part thereof will be encumbered in any manner by reason of
             any act or omission on the part of Tenant, or used or occupied, by
             anyone other than Tenant, or for any use or purpose other than a
             Permitted Use, or be sublet (which term, without limitation, shall
             include granting of concessions, licenses and the like) in whole or
             in part, or be offered or advertised for assignment or subletting.

             (b) The provisions of paragraph (a) of this Section shall apply to
             a transfer (by one or more transfers) of a majority of the stock or
             partnership interests, or other evidences of ownership of Tenant as
             if such transfer were an assignment of this Lease; but such
             provisions shall not apply to transactions with an entity into or
             with which Tenant is merged or consolidated or to which
             substantially all of Tenant's assets are transferred or to any
             entity which controls or is controlled by Tenant or is under common
             control with Tenant, provided that in any of such events (i) the
             successor to Tenant has a net worth computed in accordance with
             generally accepted accounting principles at least equal to the net
             worth of Tenant immediately prior to such merger, consolidation or
             transfer, (ii) proof satisfactory to Landlord of such net worth
             shall have been delivered to Landlord at least 10 days prior TO the
             effective date of any such transaction, and (iii) the assignee
             agrees directly with Landlord, by written instrument in form
             satisfactory to Landlord, to be bound by all the obligations of
             Tenant hereunder including, without limitation, the covenant
             against further assignment or subletting.

             (c) If this Lease be assigned, or if the Premises or any part
             thereof be sublet or occupied by anyone other than Tenant, Landlord
             may, at any time and from time to time, collect rent and other
             charges from the assignee, subtenant or occupant, and apply the net
             amount collected to the rent and other charges herein reserved, but
             no

                                       -9-
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             such assignment, subletting, occupancy, collection or modification
             of any provisions of this Lease shall be deemed a waiver of this
             covenant, or the acceptance of the assignee, subtenant or occupant
             as a tenant or a release of the original named Tenant from the
             further performance by the original named Tenant hereunder. No
             assignment or subletting hereunder shall relieve Tenant obligations
             hereunder and Tenant shall remain from its fully and primarily
             liable therefor. No assignment or subletting, or occupancy shall
             affect Permitted Uses.


                                         ARTICLE VII
 
                    RESPONSIBILITY FOR REPAIRS AND CONDITIONS OF PREMISES;

                             SERVICES TO BE FURNISHED BY LANDLORD


7.1          LANDLORD REPAIRS. (a) Except as otherwise provided in this Lease,
             Landlord agrees to keep in good order, condition and repair the
             roof, public areas, exterior walls (including exterior glass) and
             structure of the Building (including plumbing, mechanical and
             electrical systems installed by Landlord but excluding any systems
             installed specifically for Tenant's benefit or used exclusively by
             Tenant) and the HVAC system serving the Premises, all insofar as
             they affect the Premises, except that Landlord shall in no event be
             responsible to Tenant for the condition of glass in the Premises or
             for the doors (or related glass and finish work) leading to, the
             Premises, or for any condition in the Premises or the Building
             caused by any act or neglect of Tenant, its agents, employees,
             invitees or contractors. Landlord shall not be responsible to make
             any improvements or repairs to the Building other than as expressly
             in this Section 7.1 provided, unless expressly provided otherwise
             in this Lease. All costs and expenses incurred by Landlord in
             performing its obligations under this Section 7.1 shall be included
             in Operating Expenses (as said term is hereafter defined) except
             that Tenant shall, as an additional charge hereunder and within 15
             days of being invoiced by Landlord, reimburse Landlord directly for
             all costs and expenses incurred by Landlord in repairing or
             maintaining the roof top HVAC units servicing the Premises.

             (b) Landlord shall never be liable for any failure to make repairs
             which Landlord has undertaken to make under the provisions of this
             Section 7.1 or elsewhere in this Lease, unless Tenant has given
             notice to Landlord of the need to make such repairs, and Landlord
             has failed to commence to make such repairs within a reasonable
             time

                                      -10-
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             after receipt of such notice, or fails to proceed with reasonable
             diligence to complete such repairs.

             (c) Any services which Landlord is required to furnish pursuant to
             the provisions of this Lease may, at Landlord's option be furnished
             from time to time, in whole or in part, by employees of Landlord or
             by the Manager of the Property or by one or more third persons and
             Landlord further reserves the right to require Tenant to enter into
             agreements with such persons in form and content approved by
             Landlord for the furnishing of such services. Landlord shall cause
             the paved portions of the Property to be kept reasonably free and
             clear of snow, ice and refuse and shall cause the landscaped areas
             of the Property to be maintained in a reasonably attractive
             appearance.

7.2          TENANT'S AGREEMENT. (a) Tenant will keep neat and clean and
             maintain in good order, condition and repair the Premises and every
             part thereof, excepting only those repairs for which Landlord is
             responsible under the terms of this Lease, reasonable wear and tear
             of the Premises, and damage by fire or other casualty and as a
             consequence of the exercise of the power of eminent domain; and
             shall surrender the Premises, at the end of the Term, in such
             condition. Without limitation, Tenant shall continually during the
             Term of this Lease maintain the Premises in accordance with all
             laws, codes and ordinances from time to time in effect and all
             directions, rules and regulations of the proper officers of
             governmental agencies having jurisdiction, and of the Boston Board
             of Fire Underwriters, and shall, at Tenant's own expense, obtain
             all permits, licenses and the like required by applicable law.
             Notwithstanding the foregoing or the provisions of Article XII,
             Tenant shall be responsible for the cost of repairs which may be
             necessary by reason of damage to the Building caused by any act or
             neglect of Tenant or its agents, employees, contractors or invitees
             (including any damage by fire or any other casualty arising
             therefrom). Tenant shall be responsible for the payment of all
             charges for gas or other utilities used or consumed in the
             Premises. Tenant shall be responsible for the removal and disposal
             of all refuse and waste generated from the Premises and shall
             maintain a dumpster service contract with a reputable dumpster
             service company throughout the Term of this Lease. The location of
             such dumpster shall be subject to the reasonable approval of
             Landlord. In no event shall such dumpster be visable from the
             street or interfere with the use of the parking or loading areas on
             the Property and shall be in compliance with all applicable codes,
             by-laws and ordinances.

                                     - 11 -
   16
             (b) If repairs are required to be made by Tenant pursuant to the
             terms hereof, Landlord may demand that Tenant make the same
             forthwith, and if Tenant refuses or neglects to commence such
             repairs and complete the same with reasonable dispatch after such
             demand, Landlord may (but shall not be required to do so) make or
             cause such repairs to be made (the provisions of Section 14.18
             being applicable to the costs thereof) and shall not be responsible
             to Tenant for any loss or damage that may accrue to Tenant's stock
             or business by reason thereof. Notwithstanding the foregoing,
             Landlord may elect to take action hereunder immediately and without
             notice to Tenant if Landlord reasonably believes an emergency to
             exist.

7.3          FLOOR LOAD - HEAVY MACHINERY. (a) Tenant shall not place a load
             upon any floor in the Premises exceeding the floor load per square
             foot of area which such floor was designed to carry and which is
             allowed by law. Landlord reserves the right to prescribe the weight
             and position of all business machines and mechanical equipment,
             including safes, which shall be placed so as to distribute the
             weight. Business machines and mechanical equipment shall be placed
             and maintained by Tenant at Tenant's expense in settings
             sufficient, in Landlord's judgment, to absorb and prevent
             vibration, noise and annoyance. Tenant shall not move any safe,
             heavy machinery, heavy equipment, freight, bulky matter or fixtures
             into or out of the Building without Landlord's prior consent, which
             consent may include a requirement to provide insurance, naming
             Landlord as an insured, in such amounts as Landlord may deem
             reasonable.

             (b) If such safe, machinery, equipment, freight, bulky matter or
             fixtures requires special handling, Tenant agrees to employ only
             persons holding a Master Rigger's License to do such work, and that
             all work in connection therewith shall comply with applicable laws
             and regulations. Any such moving shall be at the sole risk and
             hazard of Tenant, and Tenant will exonerate, indemnity and save
             Landlord harmless against and from any liability, loss, injury,
             claim or suit resulting directly or indirectly from such moving.

7.4          BUILDING SERVICES. (a) Landlord shall also provide:

                       (i) Cold water (at temperatures supplied by the Town of
             Chelmsford) for drinking, lavatory and toilet purposes. If Tenant
             uses water for any purpose other than for ordinary lavatory and
             drinking purposes, Landlord may assess a reasonable charge for the
             additional water so used, or install a water meter and thereby
             measure Tenant's water consumption for all purposes. In the latter
             event, Tenant shall pay the cost of the meter and the cost of
             installation thereof and

                                     - 12 -
   17
             shall keep such meter and installation equipment in good working
             order and repair. Tenant agrees to pay for water consumed, as shown
             on such meter, together with the sewer charge based on such meter
             charges, as and when bills are rendered, and in default in making
             such payment Landlord may pay such charges and collect the same
             from Tenant as an additional charge.

                       (ii) Access to the Premises twenty-four hours per day,
             subject to reasonable security restrictions and restrictions based
             on emergency conditions and all other applicable provisions of this
             Lease.

             (b) Landlord reserves the right to curtail, suspend, interrupt
             and/or stop the supply of water, sewage, electrical current,
             cleaning, and other services, and to curtail, suspend, interrupt
             and/or stop use of entrances and/or lobbies serving access to the
             Building, without thereby incurring any liability to Tenant, when
             necessary by reason of accident or emergency, or for repairs,
             alterations, replacements or improvements in the judgment of
             Landlord desirable or necessary, or when prevented from supplying
             such services or use by strikes, lockouts, difficulty in obtaining
             materials, accidents or any other cause beyond Landlord's control,
             or by laws, orders or inability, by exercise of reasonable
             diligence, to obtain electricity, water, gas, steam, coal, oil or
             other suitable fuel or power. No diminution or abatement of rent or
             other compensation, nor any direct, indirect or consequential
             damages shall or will be claimed by Tenant as a result of, nor
             shall this Lease or any of the obligations of Tenant be affected or
             reduced by reason of, any such interruption, curtailment,
             suspension or stoppage in the furnishing of the foregoing services
             or use, irrespective of the cause thereof. Failure or omission on
             the part of Landlord to furnish any of the foregoing services or
             use shall not be construed as an eviction of Tenant, actual or
             constructive, nor entitle Tenant to an abatement of rent, nor to
             render the Landlord liable in damages, nor release Tenant from
             prompt fulfillment of any of its covenants under this Lease.

7.5          ELECTRICITY. (a) Landlord shall permit Landlord's existing wires,
             pipes, risers, conduits and other electrical equipment of Landlord
             to be used for the purpose of providing electrical service to the
             Premises. Tenant covenants and agrees that its electrical usage and
             consumption will not disproportionately "siphon off" electrical
             service necessary for other tenants of the Building and that its
             total connected load will not exceed the maximum load from time to
             time permitted by applicable governmental regulations nor the
             design criteria of the existing Building electrical capacity.

                                      -13-
   18
             Landlord shall not in any way be liable or responsible to Tenant
             for any loss or damage or expense which Tenant may sustain or incur
             if, during the Term of this Lease, either the quantity or character
             of electric current is changed or electric current is no longer
             available or suitable for Tenant's requirements due to a factor or
             cause beyond Landlord's control. Tenant shall purchase and install
             all lamps, tubes, bulbs, starters and ballasts. Tenant shall pay
             all charges for electricity, gas and other utilities used or
             consumed in the Premises. Tenant shall bear the cost of repair and
             maintenance of any electric or gas meter used or to be installed in
             (or serving) the Premises.

             (b) In order to insure that the foregoing requirements are not
             exceeded and to avert possible adverse affect on the Building's
             electrical system, Tenant shall not, without Landlord's prior
             consent, connect any fixtures, appliances or equipment to the
             Building's electrical distribution system, which operates on a
             voltage in excess of 120 volts nominal. If Landlord shall consent
             to the connection of any such fixtures, appliances or equipment,
             all additional risers or other electrical facilities or equipment
             required therefor shall be provided by Landlord and the cost
             thereof shall be paid by tenant upon Landlord's demand as
             Additional Rent. From time to time during the Term of this Lease,
             Landlord shall have the right to have an electrical consultant
             selected by Landlord make a survey of Tenant's electric usage, the
             result of which shall be conclusive and binding upon Landlord and
             Tenant. In the event that such survey shows that Tenant has
             exceeded the requirements set forth in paragraph (a), in addition
             to any other rights Landlord may have hereunder, Tenant shall, upon
             demand, reimburse Landlord for the costs of such survey.

             (c) Electricity and Gas Consumption.

             (i) Electricity and Natural Gas used and consummed in the Premises
             is measured by a single gas meter (the "Existing Gas Meter") and a
             single Electric Meter (the "Existing Electric Meter"). In addition
             to measuring consumption of Natural Gas and Electricity in the
             Premises, the Existing Gas Meter and Existing Electric Meter
             measure consumption of those utilities used and consumed in a
             portion of the Building which is immediately adjacent to the
             Premises and comprised of 13,619 rentable square feet (the
             "Adjacent Space"). The Adjacent Space is presently vacant and
             unoccupied and is not a portion of the Premises demised to Tenant
             under this Lease. The provisions of this paragraph 7.5(c) are
             intended to allocate certain responsibilities as to the payment of
             electricity and natural gas costs and expenses between Landlord
             (with respect to the Adjacent Space) and

                                      -14-
   19
             Tenant (with respect to the Premises) as measured by the Existing
             Gas Meter and the Existing Electric Meter.

                       (ii) Tenant hereby acknowledges that the Tenant is the
             current named billing party with respect to the Existing Gas
             Meter and the Existing Electricity Meter. Tenant hereby acknowleges
             and agrees that subject to the terms and provisions hereafter set
             forth and until receipt of written notice from the Landlord to the
             contrary, all electricity and natural gas used and consumed in the
             Adjacent Space shall be provided through the Existing Gas Meter and
             the Existing Electric Meter with the allocation of expenses
             resulting from such meters between Landlord and Tenant as
             hereafter provided. Landlord and Tenant hereby acknowledge and
             agree that the aggregate per square foot cost of providing natural
             gas and electric service to the Adjacent Space is $0.20 per
             rentable square foot contained in the Adjacent Space per annum.
             (hereafter the "Per Square Foot Utility Cost"). The Per Square Foot
             Utility Cost is based upon the assumption that the Adjacent Space
             is vacant and unoccupied and is comprised of $0.12 per rentable
             square foot per annum with respect to electricity and $0.08 per
             rentable square foot per annum with respect to natural gas. Until
             further written notice from Landlord as hereafter set forth, Tenant
             shall be responsible for payment of all costs and expenses for gas
             and electricity billed to the Existing Electric Meter and the
             Existing Gas Meter for such time as the Existing Electric Meter
             and/or the Existing Gas Meter shall remain in Tenant's name.

                       In order to reimburse Tenant for the cost of electricity
             and gas used and consumed in the Adjacent Space, Landlord shall
             pay Tenant an amount (the "Landlord's Utility Cost") equal to the
             number of rentable square feet contained in the Adjacent Space
             which shall from time to time be vacant (as designated by Landlord
             in a "Landlord's Utility Statement" as hereafter defined)
             multiplied by the Per Square Foot Utility Cost. Tenant shall from
             time to time, but not more often than once every three full
             calendar months while all or any portion of the Adjacent Space
             shall remain unoccupied (or until further notice from Landlord)
             invoice Landlord for the Landlord's Utility Cost attributable to
             the three full calendar month period setting forth the number of of
             such invoice (provided that the LST, such invoice shall be
             applicable only to the three full calendar month period immediately
             following the Commencement Date hereunder). Upon the written
             request of Tenant, or at any time at the Landlord's election,
             Landlord shall provide Tenant with a written calculation of the
             Landlord's Utility Costs applicable to any such three full-calendar
             month period setting forth the number of rentable square feet of
             the Adjacent Space which was

                                      -15-
   20
             unoccupied during such three month period and the actual number of
             days of vacancy ("Landlord's Utility Statement"). Landlord's
             Utility Statement shall be conclusive and binding upon Landlord and
             Tenant. At Landlord's option, Landlord shall be entitled to offset
             Landlord's Utility Costs against and apply amounts owing to Tenant
             hereunder against obligations of Tenant to Landlord under this
             Lease. Any failure by Tenant to pay amounts due and owing to the
             applicable utilities for gas and electricity billed to the Existing
             Gas Meter and/or the Existing Electric Meter shall entitle Landlord
             to the same rights and remedies against Tenant as Landlord has for
             a failure by Tenant to pay Basic Rent when due under this Lease.

                       (iii) Notwithstanding the terms and provisions contained
             in paragraphs (i) and (ii) of this paragraph (c) to the contrary,
             at such time as Landlord shall procure a tenant to occupy all or
             any portion of the Adjacent Space, Landlord's obligation to pay
             Landlord's Utility Costs with respect to the portion of the
             Adjacent Space occupied by such third party shall cease and come to
             an end. At Landlord's option, Landlord shall be entitled to
             continue paying Landlord's Utility Cost with respect to any portion
             of the Adjacent Space which would then remain unoccupied based upon
             the number of rentable square feet contained in the Adjacent Space
             as shall then be unoccupied and the provisions of paragraphs (i)
             and (ii) of this paragraph (c) shall remain in force and effect and
             shall be applicable to such portions of the Adjacent Space as
             remain vacant.

                       (iv) Tenant hereby acknowledges and agrees, and Landlord
             hereby reserves unto Landlord the right, exercisable by Landlord at
             any time and from time to time during the Term of this Lease to
             cause the Existing Electric Meter and the Existing Gas Meter (or
             either of them) to be placed in Landlord's name for billing
             purposes. In the event Landlord shall elect to implement the
             procedure described in the first sentence of this paragraph (iv),
             Landlord shall provide Tenant with written notice of such election 
             and Tenant hereby agrees to execute such documents and instruments 
             as may be required in order to effect a change of the named 
             billing party on the Existing Electric Meter and the Existing Gas 
             Meter (or either of them) to Landlord's name. The change of named 
             party provided herein shall be deemed effective as of the date 
             such change is made effective by the applicable utility (the 
             "Change Date"). Tenant shall be responsible for all bills for the 
             applicable utility being changed to Landlord's name prior to the 
             Change Date. From and after the Change Date, Landlord shall have 
             the right to cause electricity and natural gas used and consummed 
             in the Premises to be check-metered off of

                                      -16-
   21
             the Existing Gas Meter and/or the Existing Electric Meter, as
             applicable. As an additional charge hereunder, Tenant shall
             reimburse Landlord for the cost of electricty and/or gas used and
             consummed in the Premises as measured by the applicable check meter
             within 15 days after being billed therefor by Landlord. Landlord
             shall have the right to collect from Tenant monthly estimated
             payments of the amounts Landlord reasonably estimates will be
             sufficient to pay Tenant's electricity and/or gas bills resulting
             from the Existing Gas Meter and the Existing Electric Meter
             pursuant to this paragraph (iv).

                                  ARTICLE VIII

                                REAL ESTATE TAXES

8.1          PAYMENTS ON ACCOUNT OF REAL ESTATE TAXES. (a) For the purposes of
             this Article, the term "Tax Year" shall mean the twelve-month
             period commencing on the July 1 immediately preceding the
             Commencement Date and each twelve-month period thereafter
             commencing during the Term of this Lease; and the term "Taxes"
             shall mean all real estate taxes, special assessments and
             betterment assessments assessed with respect to the Property for
             any Tax Year.

             (b) Tenant shall pay to Landlord, as an Escalation Charge, an
             amount equal to (i) Taxes for each Tax Year (or partial Tax Year)
             falling within the Term of this Lease, multiplied by (ii) the
             Escalation Factor, such amount to be apportioned for any fraction
             of a Tax Year in which the Commencement Date falls or the Term of
             this Lease ends.

             (c) Estimated payments by Tenant on account of Taxes shall be made
             monthly and at the time and in the fashion herein provided for the
             payment of Basic Rent. The monthly amount so to be paid to Landlord
             shall be sufficient to provide Landlord by the time real estate
             tax payments are due a sum equal to Tenant's required payments, as
             estimated by Landlord from time to time, on account of Taxes for
             the then current Tax Year. Promptly after receipt by Landlord of
             bills for such Taxes, Landlord shall advise Tenant of the amount
             thereof and the computation of Tenant's payment on account thereof.
             If estimated payments theretofore made by Tenant for the Tax Year
             covered by such bills exceed the required payments on account
             thereof for such Year, Landlord shall credit the amount of
             overpayment against subsequent obligations of Tenant on account of
             Taxes (or refund such overpayment if the Term of this Lease has
             ended and Tenant has no further obligation to Landlord); but if the

                                      -17-
   22
             required payments on account thereof for such Year are greater than
             estimated payments theretofore made on account thereof for such
             Year, Tenant shall make payment to Landlord within 30 days after
             being so advised by Landlord. Landlord shall have the same rights
             and remedies for the non-payment by Tenant of any payments due on
             account of Taxes as Landlord has hereunder for the failure of
             Tenant to pay Basic Rent.

8.2          ABATEMENT. If Landlord shall receive any tax refund or
             reimbursement of Taxes or sum in lieu thereof with respect to any
             Tax Year which is not due to vacancies in the Building, then out of
             any balance remaining thereof after deducting Landlord's expenses
             reasonably incurred in obtaining such refund, Landlord shall,
             provided there does not then exist a Default of Tenant, credit an
             amount equal to such refund or reimbursement or sum in lieu thereof
             (exclusive of any interest) multiplied by the Escalation Factor
             against the obligations of Tenant next falling due under this
             Article VIII; provided, that in no event shall Tenant be entitled
             to receive a credit equal to more than the payments made by Tenant
             on account of real estate tax increases for such Year pursuant to
             paragraph (b) of Section 8.1 or to receive any payments or
             abatement of Basic Rent if Taxes for any Year are less than Base
             Taxes or Base Taxes are abated.

8.3          ALTERNATE TAXES. (a) If some method or type of taxation shall
             replace the current method of assessment of real estate taxes in
             whole or in part, or the type thereof, or if additional types of
             taxes are imposed upon the Property or Landlord relating to the
             Property, Tenant agrees that Tenant shall pay a proportionate share
             of the same as an additional charge computed in a fashion
             consistent with the method of computation herein provided, to the
             end that Tenant's share thereof shall be, to the maximum extent
             practicable, comparable to that which Tenant would bear under the
             foregoing provisions.

             (b) If a tax (other than Federal or State net income tax) is
             assessed on account of the rents or other charges payable by
             Tenant to Landlord under this Lease, Tenant agrees to pay the 
             same as an additional charge within ten (10) days after billing
             therefor, unless applicable law prohibits the payment of such tax 
             by Tenant.


                                   ARTICLE IX

                               OPERATING EXPENSES

9.1          DEFINITIONS. For the purposes of this Article, the following terms
             shall have the following respective meanings:

                                     - 18 -
   23
                       (i) Operating Year: Each calendar year in which any part
             of the Term of this Lease shall fall.

                       (ii) Operating Expenses: The aggregate costs or expenses
             reasonably incurred by Landlord with respect to the operation,
             administration, cleaning, repair, maintenance and management of the
             Property (but specifically excluding Utility Expenses) all as set
             forth in Exhibit E annexed hereto, provided that, if during any
             portion of the Operating Year for which Operating Expenses are
             being computed, less than all of Building Rentable Area was
             occupied by tenants or if Landlord is not supplying all tenants
             with the services being supplied hereunder, actual Operating
             Expenses incurred shall be reasonably extrapolated by Landlord on
             an item by item basis to the estimated Operating Expenses that
             would have been incurred if the Building were fully occupied for
             such Year and such services were being supplied to all tenants, and
             such extrapolated amount shall, for the purposes hereof, be deemed
             to be the Operating Expenses for such Year.

                       (iii) Utility Expenses: The aggregate costs or expenses
             reasonably incurred by Landlord with respect to supplying
             electricity (other than electricity supplied to those portions of
             the Building leased to tenants), oil, steam, gas, water and sewer
             and other utilities supplied to the Property and not paid for
             directly by tenants, provided that, if during any portion of the
             Operating Year for which Utility Expenses are being computed, less
             than all Building Rentable Area was occupied by tenants or if
             Landlord is not supplying all tenants with the utilities being
             supplied hereunder, actual utility expenses incurred shall be
             reasonably extrapolated by Landlord on an item-by-item basis to the
             estimated Utility Expenses that would have been incurred if the
             Building were fully occupied for such Year and such utilities were
             being supplied to all tenants, and such extrapolated amount shall,
             for the purposes hereof, be deemed to be the Utility Expenses for
             such Year.

9.2          TENANT'S PAYMENTS. (a) Tenant shall pay to Landlord, as an
             Escalation Charge, an amount equal to (i) Operating Expenses for
             each Operating Year (or partial Operating Year) falling within in
             the Term of this Lease multiplied by (ii) the Escalation Factor,
             such amount to be apportioned for any partial Operating Year in
             which the Commencement Date falls or the Term of this Lease ends.

             (b) Tenant shall pay to Landlord, as an Escalation Charge, an
             amount equal to (i) Utility Expenses for each Operating Year (or
             partial Operating Year) falling within the Term of this Lease
             multiplied by (ii) the Escalation Factor, such amount to be
             apportioned for any partial

                                      -19-
   24
             Operating Year in which the Commencement Date falls or the Term of
             this Lease ends.

             (c) Estimated payments by Tenant on account of Operating Expenses
             shall be made monthly and at the time and in the fashion herein
             provided for the payment of Basic Rent. The monthly amount so to be
             paid to Landlord shall be sufficient to provide Landlord by the end
             of each Operating Year a sum equal to Tenant's required payments,
             as estimated by Landlord from time to time during each Operating
             Year, on account of Operating Expenses and Utility Expenses for
             such Operating Year. After the end of each Operating Year, Landlord
             shall submit to Tenant a reasonably detailed accounting of
             Operating Expenses and Utility Expenses for such Year, and Landlord
             shall certify to the accuracy thereof. If estimated payments
             theretofore made for such Year by Tenant exceed Tenant's required
             payment on account thereof for such Year, according to such
             statement, Landlord shall credit the amount of overpayment against
             subsequent obligations of Tenant with respect to Operating Expenses
             and Utility Expenses (or refund such overpayment if the Term of
             this Lease has ended and Tenant has no further obligation to
             Landlord), but, if the required payments on account thereof for
             such Year are greater than the estimated payments (if any)
             theretofore made on account thereof for such Year, Tenant shall
             make payment to Landlord within thirty (30) days after being so
             advised by Landlord. Landlord shall have the same rights and
             remedies for the nonpayment by Tenant of any payments due on
             account of Operating Expenses and Utility Expenses as Landlord has
             hereunder for the failure of Tenant to pay Basic Rent.


                                    ARTICLE X

                    INDEMNITY AND PUBLIC LIABILITY INSURANCE


10.1         TENANT'S INDEMNITY. To the maximum extent this agreement may be
             made effective according to law, Tenant agrees to defend, 
             indemnify and save harmless Landlord from and against all claims,
             loss, liability, costs and damages of whatever nature arising 
             from any default by Tenant under this Lease and the following: (i) 
             from any accident, injury, death or damage whatsoever to any 
             person, or to the property of any person, occurring in or about 
             the Premises; (ii) from any accident, injury, death or damage 
             occurring outside of the Premises but on the Property, where such 
             accident, damage or injury results or is claimed to have resulted 
             from an act or omission on the part of Tenant or Tenant's agents, 
             employees, invitees or independent contractors; or (iii) in 
             connection with the conduct or management of the Premises or of 
             any business

                                      -20-
   25

         therein, or any thing or work whatsoever done, or any condition created
         (other than by Landlord) in or about the Premises; and, in any case,
         occurring after the date of this Lease, until the end of the Term of
         this Lease, and thereafter so long as Tenant is in occupancy of the
         Premises. This indemnity and hold harmless agreement shall include
         indemnity against all costs, expenses and liabilities incurred in, or
         in connection with, any such claim or proceeding brought thereon, and
         the defense thereof, including, without limitation, reasonable
         attorneys' fees and costs at both the trial and appellate levels. The
         provisions of this Section 10.1 shall survive the expiration or any
         earlier termination of this Lease.

10.2     PUBLIC LIABILITY INSURANCE. Tenant agrees to maintain in full force
         from the date upon which Tenant first enters the Premises for any
         reason, throughout the Term of this Lease, and thereafter so long as
         Tenant is in occupancy of any part of the Premises, a policy of general
         liability and property damage insurance (including broad form
         contractual liability, independent contractor's hazard and completed
         operations coverage) under which Landlord, Manager (and such other
         persons as are in privity of estate with Landlord as may be set out in
         notice from time to time) and Tenant are named as insureds, and under
         which the insurer agrees to defend, indemnify and hold Landlord,
         Manager, and those in privity of estate with Landlord, harmless from
         and against all cost, expense and/or liability arising out of or based
         upon any and all claims, accidents, injuries and damages set forth in
         Section 10.1. Each such policy shall be non-cancellable and
         non-amendable with respect to Landlord, Manager and Landlord's said
         designees without thirty (30) days' prior notice to Landlord and shall
         be in at least the amounts of the Initial Public Liability Insurance
         specified in Section 1.3 or such greater amounts as Landlord shall from
         time to time request, and a duplicate original or certificate thereof
         shall be delivered to Landlord.

10.3     TENANT'S RISK. To the maximum extent this agreement may be made
         effective according to law, Tenant agrees to use and occupy the
         Premises and to use such other portions of the Property as Tenant is
         herein given the right to use at Tenant's own risk; and Landlord shall
         have no responsibility or liability for any loss of or damage to
         Tenant's Removable Property or for any inconvenience, annoyance,
         interruption or injury to business arising from Landlord's making any
         repairs or changes which Landlord is permitted by this Lease or
         required by law to make in or to any portion of the Premises or other
         sections of the Property, or in or to the fixtures, equipment or
         appurtenances thereof. Tenant shall carry


                                     - 21 -
   26
         "all-risk" property insurance on a "replacement cost" basis (including
         so-called improvements and betterments), and provide a waiver of
         subrogation as required in Section 14.20. The provisions of this
         Section 10.3 shall be applicable from and after the execution of this
         Lease and until the end of the Term of this Lease, and during such
         further period as Tenant may use or be in occupancy of any part of the
         Premises or of the Building.

10.4     INJURY CAUSED BY THIRD PARTIES. To the maximum extent this agreement
         may be made effective according to law, Tenant agrees that Landlord
         shall not be responsible or liable to Tenant, or to those claiming by,
         through or under Tenant, for any loss or damage that may be occasioned
         by or through the acts or omissions of persons occupying adjoining
         premises or any part of the premises adjacent to or connecting with the
         Premises or any part of the Property or otherwise. The provisions of
         this Section 10.4 shall survive the expiration or any earlier
         termination of this Lease.


                                   ARTICLE XI

                          LANDLORD'S ACCESS TO PREMISES

11.1     LANDLORD'S RIGHTS. Landlord shall have the right to enter the Premises
         at all reasonable hours for the purpose of inspecting or making repairs
         to the same, and Landlord shall also have the right to make access
         available at all reasonable hours to prospective or existing
         mortgagees, purchasers or tenants of any part of the Property.


                                   ARTICLE XII

                            FIRE, EMINENT DOMAIN, ETC.


12.1     ABATEMENT OF RENT. If the Premises shall be damaged by fire or
         casualty, Basic Rent and Escalation Charges payable by Tenant shall
         abate proportionately for the period in which, by reason of such
         damage, there is substantial interference with Tenant's use of the
         Premises, having regard to the extent to which Tenant may be required
         to discontinue Tenant's use of all or a portion of the Premises, but
         such abatement or reduction shall end if and when Landlord shall have
         substantially restored the Premises (excluding any alterations,
         additions or improvements made by Tenant pursuant to Section 5.2) to
         the condition in which they were prior to such damage. If the Premises
         shall be affected by any


                                      -22-
   27
         exercise of the power of eminent domain, Basic Rent and Escalation
         Charges payable by Tenant shall be justly and equitably abated and
         reduced according to the nature and extent of the loss of use thereof
         suffered by Tenant. In no event shall Landlord have any liability for
         damages to Tenant for inconvenience., annoyance, or interruption of
         business arising from such fire, casualty or eminent domain.

12.2     LANDLORD'S RIGHT OF TERMINATION. If the Premises or the Building are
         substantially damaged by fire or casualty (the term "substantially
         damaged" meaning damage of such a character that the same cannot, in
         ordinary course, reasonably be expected to be repaired within sixty
         (60) days from the time the repair work would commence), or if any part
         of the Building is taken by any exercise of the right of eminent
         domain, then Landlord shall have the right to terminate this Lease
         (even if Landlord's entire interest in the Premises may have been
         divested) by giving notice of Landlord's election so to do within 90
         days after the occurrence of such casualty or the effective date of
         such taking, whereupon this Lease shall terminate thirty (30) days
         after the date of such notice with the same force and effect as if such
         date were the date originally established as the expiration date
         hereof.

12.3     RESTORATION, If this Lease shall not be terminated pursuant to Section
         12.2, Landlord shall thereafter use due diligence to restore the
         Premises (excluding any alterations, additions or improvements made by
         Tenant) to proper condition for Tenant's use and occupation, provided
         that Landlord's obligation shall be limited to the amount of insurance
         proceeds available therefor. If, for any reason, such restoration shall
         not be substantially completed within six months after the expiration
         of the 90-day period referred to in Section 12.2 (which six-month
         period may be extended for such periods of time as Landlord is
         prevented from proceeding with or completing such restoration for any
         cause beyond Landlord's reasonable control, but in no event for more
         than an additional three months), Tenant shall have the right to
         terminate this Lease by giving notice to Landlord thereof within thirty
         (30) days after the expiration of such period (as so extended). Upon
         the giving of such notice, this Lease shall cease and come to an end
         without further liability or obligation on the part of either party
         unless, within such 30-day period, Landlord substantially completes
         such restoration. Such right of termination shall be Tenant's sole and
         exclusive remedy at law or in equity for Landlord's failure so to
         complete such restoration.

12.4     AWARD. Landlord shall have and hereby reserves and excepts, and Tenant
         hereby grants and assigns to



                                      -23-
   28
         Landlord, all rights to recover for damages to the Property and the
         leasehold interest hereby created, and to compensation accrued or
         hereafter to accrue by reason of such taking, damage or destruction,
         and by way of confirming the foregoing, Tenant hereby grants and
         assigns, and covenants with Landlord to grant and assign to Landlord,
         all rights to such damages or compensation. Nothing contained herein
         shall be construed to prevent Tenant from, at its sole cost and
         expense, prosecuting a separate condemnation proceeding with respect to
         a claim for the value of any of Tenant's Removable Property installed
         in the Premises by Tenant at Tenant's expense and for relocation
         expenses, provided that such action shall not affect the amount of
         compensation otherwise recoverable by Landlord from the taking
         authority.

                                  ARTICLE XIII
                                     DEFAULT

13.1     TENANT'S DEFAULT. (a) If at any time subsequent to the date of this
         Lease any one or more of the following events (herein referred to as a
         "Default of Tenant") shall happen:

                  (i) Tenant shall fail to pay the Basic Rent, Reimbursement
         Rent, Escalation Charges or other sums payable as additional charges
         hereunder when due; or

                  (ii) Tenant shall neglect or fail to perform or observe any
         other covenant herein contained on Tenant's part to be performed or
         observed, or Tenant shall desert or abandon the Premises or the
         Premises shall become, or appear to have become vacant (regardless
         whether the keys shall have been surrendered or the rent and all other
         sums due shall have been paid), and Tenant shall fail to remedy the
         same within thirty (30) days after notice to Tenant specifying such
         neglect or failure, or if such failure is of such a nature that Tenant
         cannot reasonably remedy the same within such thirty (30) day period,
         Tenant shall fail to commence promptly to remedy the same and to
         prosecute such remedy to completion with diligence and continuity; or

                  (iii) Tenant's leasehold interest in the Premises shall be
         taken on execution or by other process of law directed against Tenant;
         or

                  (iv) Tenant shall make an assignment for the benefit of
         creditors or shall file a voluntary petition in bankruptcy or shall be
         adjudicated bankrupt or insolvent, or shall file any petition or answer
         seeking



                                      -24-
   29
         any reorganization, arrangement, composition, readjustment,
         liquidation, dissolution or similar relief for itself under any present
         or future Federal, State or other statute, law or regulation for the
         relief of debtors, or shall seek or consent to or acquiesce in the
         appointment of any trustee, receiver or liquidator of Tenant or of all
         or any substantial part of its properties, or shall admit in writing
         its inability to pay its debts generally as they become due; or

                  (v) A petition shall be filed against Tenant in bankruptcy or
         under any other law seeking any reorganization, arrangement,
         composition, readjustment, liquidation, dissolution, or similar relief
         under any present or future Federal, State or other statute, law or
         regulation and shall remain undismissed or unstayed for an aggregate of
         sixty (60) days (whether or not consecutive), or if any debtor in
         possession (whether or not Tenant) trustee, receiver or liquidator of
         Tenant or of all or any substantial part of its properties or of the
         Premises shall be appointed without the consent or acquiescence of
         Tenant and such appointment shall remain unvacated or unstayed for an
         aggregate of sixty (60) days (whether or not consecutive); or

                  (vi) If a Default of Tenant of the kind set forth in clauses
         (i) or (ii) above shall occur and if either (a) Tenant shall cure such
         Default within the applicable grace period or (b) Landlord shall, in
         its sole discretion , permit Tenant to cure such Default after the
         applicable grace period has expired, and an event which would
         constitute a similar Default if not cured within the applicable grace
         period shall occur more than once within the next 365 days, whether or
         not such event is cured within the applicable grace period;

then in any such case (1) if such Default of Tenant shall occur prior to the
Commencement Date, this Lease shall ipso facto, and without further act on the
part of Landlord, terminate, and (2) if such Default of Tenant shall occur after
the Commencement Date, Landlord may terminate this Lease by notice to Tenant,
and thereupon this Lease shall come to an end as fully and completely as if such
date were the date herein originally fixed for the expiration of the Term of
this Lease, and Tenant will then quit and surrender the Premises to Landlord,
but Tenant shall remain liable as hereinafter provided.

(b) If this Lease shall be terminated as provided in this Article, or if any
execution or attachment shall be issued against Tenant or any of Tenant's
property whereupon the Premises shall be taken or occupied by someone other than
Tenant, then Landlord may, without notice, re-enter the Premises, either by
force, summary



                                      -25-
   30
proceedings, ejectment or otherwise, and remove and dispossess Tenant and all
other persons and any and all property from the same, as if this Lease had not
been made, and Tenant hereby waives the service of notice of intention to
re-enter or to institute legal proceedings to that end.

(c) in the event of any termination, Tenant shall pay the Basic Rent, Escalation
Charges and other sums payable hereunder up to the time of such termination, and
thereafter Tenant, until the end of what would have been the Term of this Lease
in the absence of such termination, and whether or not the Premises shall have
been relet, shall be liable to Landlord for, and shall pay to Landlord, as
liquidated current damages, the Basic Rent, Escalation Charges and other sums
which would be payable hereunder if such termination had not occurred, less the
net proceeds, if any, of any reletting of the Premises, after deducting all
expenses in connection with such reletting, including, without limitation, all
repossession costs, brokerage commissions, legal expenses, attorneys' fees,
advertising, expenses of employees, alteration costs and expenses of preparation
for such reletting. Tenant shall pay such current damages to Landlord monthly on
the days which the Basic Rent would have been payable hereunder if this Lease
had not been terminated.

(d) At any time after such termination, whether or not Landlord shall have
collected any such current damages, as liquidated final damages and in lieu of
all such current damages beyond the date of such demand, at Landlord's election
Tenant shall pay to Landlord and amount equal to the excess, if any, of the
Basic Rent, Escalation Charges and other sums as hereinbefore provided which
would be payable hereunder from the date of such demand (assuming that, for the
purposes of this paragraph, annual payments by Tenant on account of Taxes,
Utility Expenses and Operating Expenses would be the same as the payments
required for the immediately preceding Operating or Tax Year) for what would be
the then unexpired Term of this Lease if the same had remained in effect, over
the then fair net rental value of the Premises for the same period.

(e) In the case of any Default by Tenant, re-entry, expiration and dispossession
by summary proceeding or otherwise, Landlord may (i) re-let the Premises or any
part or parts thereof, either in the name of Landlord or otherwise, for a term
or terms which may at Landlord's option be equal to or less than or exceed the
period which would otherwise have constituted the balance of the Term of this
Lease and may grant concessions or free rent to the extent that Landlord
considers advisable and



                                      -26-
   31
         necessary to re-let the same and (ii) may make such reasonable
         alterations, repairs and decorations in the Premises as Landlord in its
         sole judgment considers advisable and necessary for the purpose of
         reletting the Premises; and the making of such alterations, repairs and
         decorations shall not operate or be construed to release Tenant from
         liability hereunder as aforesaid. Landlord shall in no event be liable
         in any way whatsoever for failure to re-let the Premises, or, in the
         event that the Premises are re-let, for failure to collect the rent
         under such re-letting. Tenant hereby expressly waives any and, all
         rights of redemption granted by or under any present or future laws in
         the event of Tenant being evicted or dispossessed, or in the event of
         Landlord obtaining possession of the Premises, by reason of the
         violation by Tenant of any of the covenants and conditions of this
         Lease.

         (f) If a Guarantor of this Lease is named in Section 1.2, the happening
         of any of the events described in paragraphs (a)(iv) or (a)(v) of this
         Section 13.1 with respect to the Guarantor shall constitute a Default
         of Tenant hereunder.

         (g) The specified remedies to which Landlord may resort hereunder are
         not intended to be exclusive of any remedies or means of redress to
         which Landlord may at any time be entitled to lawfully, and Landlord
         may invoke any remedy (including the remedy of specific performance)
         allowed at law or in equity as if specific remedies were not herein
         provided for.

         (h) All costs and expenses incurred by or on behalf of Landlord
         (including, without limitation, attorneys' fees and expenses) in
         enforcing its rights hereunder or occasioned by any Default of Tenant
         shall be paid by Tenant.

13.2     LANDLORD'S DEFAULT. Landlord shall in no event be in default of the
         performance of any of Landlord's obligations hereunder unless and until
         Landlord shall have unreasonably failed to perform such obligation
         within a period of time reasonably required to correct any such
         default, after notice by Tenant to Landlord specifying wherein Landlord
         has failed TO perform any such obligations.


                                   ARTICLE XIV

                            MISCELLANEOUS PROVISIONS


14.1     EXTRA HAZARDOUS USE. Tenant covenants and agrees that Tenant will
         not do or permit anything to be done in or


                                      -27-
   32
         upon the Premises, or bring in anything or keep anything therein, which
         shall increase the rate of property or liability insurance on the
         Premises or of the Building above the standard rate applicable to
         premises being occupied for Permitted Uses; and Tenant further agrees
         that, in the event that Tenant shall do any of the foregoing, Tenant
         will promptly pay to Landlord, on demand, any such increase resulting
         therefrom, which shall be due and payable as an additional charge
         hereunder.

14.2     WAIVER. (a) Failure on the part of Landlord or Tenant to complain of
         any action or non-action on the part of the other, no matter how long
         the same may continue, shall never be a waiver by Tenant or Landlord,
         respectively, of any of the other's rights hereunder. Further, no
         waiver at any time of any of the provisions hereof by Landlord or
         Tenant shall be construed as a waiver of any of the other provisions
         hereof, and a waiver at any time of any of the provisions hereof shall
         not be construed as a waiver at any subsequent time of the same
         provisions. The consent or approval of Landlord or Tenant to or of any
         action by the other requiring such consent or approval shall not be
         construed to waive or render unnecessary Landlord's or Tenant's consent
         or approval to or of any subsequent similar act by the other.

         (b) No payment by Tenant, or acceptance by Landlord, of a lesser amount
         than shall be due from Tenant to Landlord shall be treated otherwise
         than as a payment on account of the earliest installment of any payment
         due from Tenant under the provisions hereof. The acceptance by Landlord
         of a check for a lesser amount with an endorsement or statement
         thereon, or upon any letter accompanying such check, that such lesser
         amount is payment in full, shall be given no effect, and Landlord may,
         accept such check without prejudice to any other rights or remedies
         which Landlord may have against Tenant.

14.3     COVENANT OF QUIET ENJOYMENT. Tenant, subject to the terms and
         provisions of this Lease, on payment of the Basic Rent and Escalation
         Charges and observing, keeping and performing all of the other terms
         and provisions of this Lease on Tenant's part to be observed, kept and
         performed, shall lawfully, peaceably and quietly have, hold, occupy
         and enjoy the Premises during the term hereof, without hindrance or
         ejection by any persons lawfully claiming under Landlord to have title
         to the Premises superior to Tenant; the foregoing covenant of quiet
         enjoyment is in lieu of any other covenant, express or implied.

14.4     LANDLORD'S LIABILITY. (a) Tenant specifically agrees to look solely to
         Landlord's then equity interest in the



                                      -28-
   33
         Property at the time owned, for recovery of any judgment from Landlord;
         it being specifically agreed that Landlord (original or successor)
         shall never be personally liable for any such judgment, or for the
         payment of any monetary obligation to Tenant. The provision contained
         in the foregoing sentence is not intended to, and shall not, limit any
         right that Tenant might otherwise have to obtain injunctive relief
         against Landlord or Landlord's successors in interest, or to take any
         action not involving the personal liability of Landlord (original or
         successor) to respond in monetary damages from Landlord's assets other
         than Landlord's equity interest in the Property.

         (b) With respect to any services or utilities to be furnished by
         Landlord to Tenant, Landlord shall in no event be liable for failure to
         furnish the same when prevented from doing so by Force Majeure, strike,
         lockout, breakdown, accident, order or regulation of or by any
         governmental authority, or failure of supply, or inability by the
         exercise of reasonable diligence to obtain supplies, parts or employees
         necessary to furnish such services, or because of war or other
         emergency, or for any cause beyond Landlord's reasonable control, or
         for any cause due to any act or neglect of Tenant or Tenant's servants,
         agents, employees, licensees or any person claiming by, through or
         under Tenant; nor shall any such failure give rise to any claim in
         Tenant's favor that Tenant has been evicted, either constructively or
         actually, partially or wholly.


         (c) In no event shall Landlord ever be liable to Tenant for any loss of
         business or any other indirect or consequential damages suffered by
         Tenant from whatever cause.

         (d) With respect to any repairs or restoration which are required or
         permitted to be made by Landlord, the same may be made during normal
         business hours and Landlord shall have no liability for damages to
         Tenant for inconvenience, annoyance or interruption of business arising
         therefrom.

14.5     NOTICE TO MORTGAGEE OR GROUND LESSOR.  After receiving notice from any
         person, firm or other entity that it holds a mortgage or a ground
         lease which includes the Premises, no notice from Tenant to Landlord
         alleging any default by Landlord shall be effective unless and until a
         copy of the same is given to such holder or ground lessor (provided
         Tenant shall have been furnished with the name and address of such
         holder or ground lessor), and the curing of any of Landlord's defaults
         by such holder or ground lessor shall be treated as performance by
         Landlord.




                                      -29-
   34
14.6     ASSIGNMENT OF RENTS AND TRANSFER OF TITLE. (a) With reference to any
         assignment by Landlord of Landlord's interest in this Lease, or the
         rents payable hereunder, conditional in nature or otherwise, which
         assignment is made to the holder of a mortgage on property which
         includes the Premises, Tenant agrees that the execution thereof by
         Landlord, and the acceptance thereof by the holder of such mortgage,
         shall never be treated as an assumption by such holder of any of the
         obligations of Landlord hereunder unless such holder shall, by notice
         sent to Tenant, specifically otherwise elect and that, except as
         aforesaid, such holder shall be treated as having assumed Landlord's
         obligations hereunder only upon foreclosure of such holder's mortgage
         and the taking of possession of the Premises.

         (b) In no event shall the acquisition of Landlord's interest in the
         Property by a purchaser which, simultaneously therewith, leases
         Landlord's entire interest in the Property back to the seller thereof
         be treated as an assumption by operation of law or otherwise, of
         Landlord's obligations hereunder, but Tenant shall look solely to such
         seller-lessee, and its successors from time to time in title, for
         performance of Landlord's obligations hereunder. In any such event,
         this Lease shall be subject and subordinate to the lease to such
         purchaser. For all purposes, such seller-lessee, and its successors in
         title, shall be the Landlord hereunder unless and until Landlord's
         position shall have been assumed by such purchaser-lessor.

         (c) Except as provided in paragraph (b) of this Section, in the event
         of any transfer of title to the Property by Landlord, Landlord shall
         thereafter be entirely freed and relieved from the performance and
         observance of all covenants and obligations hereunder.

14.7     RULES AND REGULATIONS. Tenant shall abide by rules and regulations set
         forth in Exhibit C attached hereto and those rules and regulations from
         time to time established by Landlord, it being agreed that such rules
         and regulations will established and applied by Landlord in a non-
         discriminatory fashion, such that all rules and regulations shall be
         generally applicable to other tenants of the Building of similar nature
         to the Tenant named herein. Landlord agrees to use reasonable efforts
         to insure that any such rules and regulations are uniformly enforced,
         but Landlord shall not be liable to Tenant for violation of the same by
         any other tenant or occupant of the Building, or persons having
         business with them. In the event that there shall be any conflict
         between such rules and regulations and the provisions of this Lease,
         the provisions of this Lease shall control.




                                      -30-
   35
14.8     ADDITIONAL CHARGES. If Tenant shall fail to pay when due any sums under
         this Lease designated or payable as an additional charge, Landlord
         shall have the same rights and remedies as Landlord has hereunder for
         failure to pay Basic Rent.

14.9     INVALIDITY OF PARTICULAR PROVISIONS. If any term or provision of this
         Lease, or the application thereof to any person or circumstance shall,
         to any extent, be invalid or unenforceable, the remainder of this
         Lease, or the application of such term or provision to persons or
         circumstances other than those as to which it is held invalid or
         unenforceable, shall not be affected thereby, and each term and
         provision of this Lease shall be valid and be enforced to the fullest
         extent permitted by Law.

14.10    PROVISIONS BINDING, ETC. Except as herein otherwise provided, the terms
         hereof shall be binding upon and shall inure to the benefit of the
         successors and assigns, respectively, of Landlord and Tenant and, if
         Tenant shall be an individual, upon and to his heirs, executors,
         administrators, successors and assigns. Each term and each provision of
         this Lease to be performed by Tenant shall be construed to be both a
         covenant and a condition. The reference contained to successors and
         assigns of Tenant is not intended to constitute a consent to assignment
         by Tenant, but has reference only to those instances in which Landlord
         may later give consent to a particular assignment as required by those
         provisions of Article VI hereof.

14.11    RECORDING. Tenant agrees not to record this Lease, but each party
         hereto agrees, on the request of the other, to execute a so-called
         notice of lease in form recordable and complying with applicable law
         and reasonably satisfactory to Landlord's attorneys. In no event shall
         such document set forth the rent or other charges payable by Tenant
         under this Lease; and any such document shall expressly state that it
         is executed pursuant to the provisions contained in this Lease, and is
         not intended to vary the terms and conditions of this Lease.

 14.12   NOTICES. Whenever, by the terms of this Lease, notices, consents or
         approvals shall or may by given either to Landlord or to Tenant, such
         notices, consents or approvals shall be in writing and shall be sent by
         registered or certified mail, return receipt requested, postage
         prepaid:

         If intended for Landlord, addressed to Landlord at Landlord's Original
         Address with a copy Addressed to Landlord at 730 Third Avenue, New
         York, New York 10017 Attention: Douglas Lawrence (or to such other
         address as




                                      -31-
   36
         may from time to time hereafter by designated by Landlord by like
         notice).

         If intended for Tenant, addressed to Tenant at Tenant's original
         Address until the Commencement Date and thereafter to the Premises (or
         to such other address or addresses as may from time to time hereafter
         be designated by Tenant by like notice.)

         All such notices shall be effective when deposited in the United States
         Mail within the Continental United States, provided that the same are
         received in ordinary course at the address to which the same were sent.

14.13    WHEN LEASE BECOMES BINDING. The submission of this document for
         examination and negotiation does not constitute an offer to lease, or a
         reservation of, or option for, the Premises, and this document shall
         become effective and binding only upon the execution and delivery
         hereof by both Landlord and Tenant. All negotiations, considerations,
         representations and understandings between Landlord and Tenant are
         incorporated herein and this Lease expressly supersedes any proposals
         or other written documents relating hereto. this Lease may be modified
         or altered only by written agreement between Landlord and Tenant, and
         no act or omission of any employee or agent of Landlord shall alter,
         change or modify any of the provisions hereof.

14.14    PARAGRAPH HEADINGS. The paragraph headings throughout this instrument
         are for convenience and reference only, and the words contained therein
         shall in no way be held to explain, modify, amplify or aid in the
         interpretation, construction, or meaning of the provisions of this
         Lease.

14.15    RIGHTS OF MORTGAGEE OR GROUND LESSOR. This Lease shall be subordinate
         to any mortgage or ground lease from time to time encumbering the
         Premises, whether executed and delivered prior to or subsequent to the
         date of this Lease, if the holder of such mortgage or ground lease
         shall so elect. If this Lease is subordinate to any mortgage or ground
         lease and the holder thereof (or successor) shall succeed to the
         interest of Landlord, at the election of such holder (or successor)
         Tenant shall attorn to such holder and this Lease shall continue in
         full force and effect between such holder (or successor) and Tenant.
         Tenant agrees to execute such instruments of subordination or
         attornment in confirmation of the foregoing agreement as such holder
         may request, and Tenant hereby appoints such holder as Tenant's
         attorney-in-fact to execute such subordination or attornment agreement
         upon default of Tenant in complying with such holder's request.




                                      -32-
   37
14.16    STATUS REPORT. Recognizing that both parties may find it necessary to
         establish to third parties, such as accountants, banks, mortgagees,
         ground lessors, or the like, the then current status of performance
         hereunder, either party, on the request of the other made from time to
         time, will promptly furnish to Landlord, or the holder of any mortgage
         or ground lease encumbering the Premises, or to Tenant, as the case may
         be, a statement of the status of any matter pertaining to this Lease,
         including, without limitation, acknowledgement that (or the extent to
         which) each party is in compliance with its obligations under the terms
         of this Lease.

14.17    SECURITY DEPOSIT. Concurrently with the execution and delivery of this
         Lease, Tenant shall deposit the Security Deposit specified in Section
         1.2 hereof and that Landlord shall hold the same throughout the Term of
         this Lease as security for the performance by Tenant of all obligations
         on the part of Tenant hereunder. Landlord shall have the right from
         time to time without prejudice to any other remedy Landlord may have on
         account thereof, to apply such deposit, or any part thereof, to
         Landlord's damages arising from, or to cure, any Default of Tenant. If
         Landlord shall so apply any or all of such deposit, Tenant shall
         immediately deposit with Landlord the amount so applied to be held as
         security hereunder. There then existing no Default of Tenant, Landlord
         shall return the deposit, or so much thereof as shall theretofore not
         been applied in accordance with the terms of this Section 14.17, to
         Tenant on the expiration or earlier termination of the Term of this
         Lease and surrender of possession of the Premises by Tenant to
         Landlord at such time. While Landlord holds such deposit, Landlord
         shall have no obligation to pay interest on the same and shall have the
         right to commingle the same with Landlord's other funds. If Landlord
         conveys Landlord's interest under this Lease, the deposit, or any part
         thereof not previously applied, may be turned over by Landlord to
         Landlord's grantee, and, if so turned over, Tenant agrees to look
         solely to such grantee for proper application of the deposit in
         accordance with the terms of this Section 14.17, and the return thereof
         in accordance therewith. The holder of a mortgage shall not be
         responsible to Tenant for the return or application of any such
         deposit, whether or not it succeeds to the position of Landlord
         hereunder, unless such deposit shall have been received in hand by such
         holder.

         Provided that Tenant is not otherwise in default in the performance or
         observance of any term, covenant, condition or agreement to be
         performed or observed by Tenant hereunder, Tenant shall be permitted to
         apply a portion (namely $7,455.37) of the Security Deposit held by
         Landlord hereunder against the Basic Rent obligation



                                      -33-
   38
         for and with respect to the last month of the Initial Term.

14.18    REMEDYING DEFAULTS. Landlord shall have the right, but shall not be
         required, to pay such sums or to do any act which requires the
         expenditure of monies which may be necessary or appropriate by reason
         of the failure or neglect of Tenant to perform any of the provisions of
         this Lease, and in the event of the exercise of such right by Landlord,
         Tenant agrees to pay to Landlord forthwith upon demand all such sums,
         together with interest thereon at a rate equal to 3% over the prime
         rate in effect from time to time at the Bank of Boston (but in no event
         less than 18% per annum), as an additional charge. Any payment of Fixed
         Rent, Escalation Charges or other sums payable hereunder not paid when
         due shall, at the option of Landlord, bear interest at a rate equal to
         3% over the prime rate in effect from time to time at the Bank of
         Boston (but in no event less than 18% per annum) from the due date
         thereof and shall be payable forthwith on demand by Landlord, as an
         additional charge.

14.19    HOLDING OVER. Any holding over by Tenant after the expiration of the
         Term of this Lease shall be treated as a daily tenancy at sufferance at
         a rate equal to the then fair rental value of the Premises but in no
         event less twice the sum of (i) Fixed Rent and (ii) Escalation Charges
         in effect on the expiration date. Tenant shall also pay to Landlord all
         damages, direct and/or indirect (including any loss of a tenant or
         rental income), sustained by reason of any such holding over.
         Otherwise, such holding over shall be on the terms and conditions set
         forth in this Lease as far as applicable. The Landlord may, but shall
         not be required to, and only on written notice to Tenant after the
         expiration of the Term hereof, elect to treat such holding over as an
         extension of the Term of this Lease for a period of up to one (1) year,
         as designated by Landlord, such extension to be on the terms and
         conditions set forth in this Section 14.19.

14.20    WAIVER OF SUBROGATION. Insofar as, and to the extent that, the
         following provision shall not make it impossible to secure insurance 
         coverage obtainable from responsible insurance companies doing 
         business in the locality in which the Property is located (even though 
         extra premium may result therefrom) Landlord and Tenant mutually agree 
         that any property damage insurance carried by either shall provide 
         for the waiver by the insurance carrier of any right of subrogation 
         against the other, and they further mutually agree that, with respect 
         to any damage to property, the loss from which is covered by insurance 
         then being carried by them, respectively, the one carrying such 
         insurance and suffering such loss releases the other of and from any 
         and all claims with

                              -34- 
   39
         respect to such loss to the extent of the insurance proceeds paid with
         respect thereto.

4.21     SURRENDER OF PREMISES. Upon the expiration or earlier termination of
         the Term of this Lease, Tenant shall peaceably quit and surrender to
         Landlord the Premises in neat and clean condition and in good order,
         condition and repair, together with all alterations, additions and
         improvements which may have been made or installed in, on or to the
         Premises prior to or during the Term of this Lease, excepting only
         ordinary wear and use and damage by fire or other casualty for which,
         under other provisions of this Lease, Tenant has no responsibility of
         repair and restoration. Tenant shall remove all of Tenant's Removable
         Property and, to the extent specified by Landlord, all alterations and
         additions made by Tenant and all partitions wholly within the Premises;
         and shall repair any damage to the Premises or the Building caused by
         such removal. Any Tenant's Removable Property which shall remain in the
         Building or on the Premises after the expiration or termination of the
         Term of this Lease shall be deemed conclusively to have been abandoned,
         and either may be retained by Landlord as its property or may be
         disposed of in such manner as Landlord may see fit, at Tenant's sole
         cost and expense.

14.22    SUBSTITUTE SPACE. If Landlord so requests, Tenant shall vacate the
         Premises and relinquish its rights with respect to the same provided
         that Landlord shall provide to Tenant substitute space in the Building,
         such space to be reasonably comparable in size, layout, finish and
         utility to the Premises, and further provided that Landlord shall, at
         its sole cost and expense, move Tenant and its Removable Property from
         the Premises to such new space in such manner as will minimize, to the
         greatest extent practicable, undue interference with the business or
         operation of Tenant. Any such substitute space shall, from and after
         such relocation, be treated as the Premises demised under this Lease,
         and shall be occupied by Tenant under the same terms, provisions and
         conditions as are set forth in this Lease.

14.23    BROKERAGE. Tenant warrants and represents that Tenant has dealt with no
         broker in connection with the consummation of this Lease and, in the
         event of any brokerage claims against Landlord predicated upon prior
         dealings with Tenant, Tenant agrees to defend the same and indemnify
         Landlord against any such claim (except any claim by the Broker).

14.24    SPECIAL TAXATION PROVISIONS. Landlord shall have the right at any time
         and from time to time, to unilaterally amend the provisions of this
         Lease if Landlord is advised by its Counsel that all or any portion of
         the monies paid



                                      -35-
   40
         by Tenant to Landlord hereunder are, or may be deemed to be, unrelated
         business income within the meaning of the United States Internal
         Revenue Code, or regulation issued thereunder, and Tenant agrees that
         it will execute all documents or instruments necessary to effect such
         amendment or amendments, provided that no such amendment shall result
         in Tenant having to pay in the aggregate more money on account of its
         occupancy of the demised premises under the provisions of this Lease as
         so amended and provided further, that no such amendment or amendments
         shall result in Tenant receiving under the provisions of this Lease
         less services than it is entitled to receive nor services of a lesser
         quality. Anything contained in the foregoing provisions of this Lease
         (including, without limitation, Article VI hereof) to the contrary
         notwithstanding, neither Tenant nor any other person having an interest
         in the possession, use, occupancy or utilization of the Premises, shall
         enter into any lease, sublease, license, concession or other agreement
         for use, occupancy, utilization of space in the Premises which provides
         for rental or other payment for such use, occupancy or utilization of
         space, in whole or in part, on the net income or profits derived by any
         person from the Premises leased, used, occupied or utilized (other than
         an amount based on a fixed percentage or percentage of receipts for
         sales) and any such recorded lease, sublease, license, concession or
         other agreement shall be absolutely void and ineffective as a
         conveyance of any right or interest in the possession, use, occupancy
         or utilization of any part of the Premises.

14.25    HAZARDOUS MATERIALS. Tenant shall not (either with or without
         negligence) cause or permit the escape, disposal, release or threat of
         release of any biologically or chemically active or other Hazardous
         Materials (as said term is hereafter defined) on, in, upon or under the
         Property or the Premises. Tenant shall not allow the generation,
         storage, use or disposal of such Hazardous Materials in any manner not
         sanctioned by law or by the highest standards prevailing in the
         industry for the generation, storage, use and disposal of such
         Hazardous Materials, nor allow to be brought into the Property any such
         Hazardous Materials except for use in the ordinary course of Tenant's
         business, and then only after written notice is given to Landlord of
         the identity of such Hazardous Materials. Hazardous Materials shall
         include, without limitation, any material or substance which is (i)
         petroleum, (ii) asbestos, (iii) designated as a "hazardous substance"
         pursuant to Section 311 of the Federal Water Pollution Control Act, 33
         U.S.C. SS 1251 et seq. (33 U.S.C. SS 1321) or listed pursuant to SS 307
         of the Federal Water Pollution Control Act (33 U.S.C. SS 1317), (iv)
         defined as a "hazardous waste" pursuant to



                                      -36-
   41
         Section 1004 of the Resource Conservation and Recovery Act, 42 U.S.C.
         SS 6901 et seq. (42 U.S.C. SS 6903), (v) defined as a "hazardous
         substance" pursuant to Section 101 of the Comprehensive Environmental
         Response, Compensation, and Liability Act, 42 U.S.C. SS 9601 et seq.
         (42 U.S.C. SS 9601), as amended, or (vi) defined as "oil" or a
         "hazardous waste", a "hazardous substance", a "hazardous material" or a
         "toxic material" under any other law, rule or regulation applicable to
         the Property, including, without limitation, Chapter 21E of the
         Massachusetts General Laws, as amended. If any lender or governmental
         agency shall ever require testing to ascertain whether or not there has
         been any release of Hazardous Materials, then the reasonable costs
         thereof shall be reimbursed by Tenant to Landlord upon demand as
         additional charges but only if such requirement applies to the Premises
         or may be the result of the acts or omissions of Tenant. In addition,
         Tenant shall execute affidavits, representations and the like, from
         time to time, at Landlord's request concerning Tenant's best knowledge
         and belief regarding the presence of Hazardous Materials on the
         Premises. In all events, Tenant shall indemnify and save Landlord
         harmless from any release on threat of release on the presence or
         existence of Hazardous Materials on the Premises occurring while Tenant
         is in possession, or elsewhere on the Property if caused by Tenant or
         persons acting under Tenant. The within covenants and indemnity shall
         survive the expiration or earlier termination of the Term of this
         Lease. Landlord expressly reserves the right to enter the Premises to
         perform regular inspections.

14.26    GOVERNING LAW. This Lease shall be governed exclusively by the
         provisions hereof and by the laws of the Commonwealth of Massachusetts,
         as the same may from time to time exist.

         IN WITNESS WHEREOF, Landlord and Tenant have caused this Lease to be
duly executed, under seal, by persons hereunto duly

                                      -37-
   42
authorized, in multiple copies, each to be considered an original hereof, as of
the date first set forth above.

                                                TENANT:
                                                VOICETEK CORPORATION

Dated:  May 25, 1993                            By: /s/ Stephen A. Gorgal
        ---------------                            -----------------------------
                                                Its:  Treasurer
                                                   -----------------------------

                                                LANDLORD:

                                                TEACHERS REALTY CORPORATION

Dated: May 25, 1993                             By: /s/ Richard J. Usas
       ---------------                            -----------------------------
                                                Its: Director
                                                    ----------------------------
   43
                                   EXHIBIT A

                             [VOICETEK FLOOR PLAN]
   44
                                  EXHIBIT B 

                         [VOICETEK PARTIAL FLOOR PLAN]

         
   45
                                    EXHIBIT C

                              RULES AND REGULATIONS


         1. The sidewalks, paved and/or landscaped areas shall not be obstructed
or encumbered by Tenant or used for any purpose other than ingress and egress to
and from the demised premises.

         2. No sign, advertisement, notice or other lettering shall be
exhibited, inscribed, painted or affixed by Tenant on any part of the demised
premises or Building so as to be visible from outside the demised premises
without the prior written consent of Landlord, which will not be unreasonably
withheld or delayed


                           In the event of the violation of this paragraph,
Landlord may remove same without any liability, and may charge the expense
incurred in such removal to Tenant, as additional rent.

         3. No awnings, curtains, blinds, shades, screens or other projections
shall be attached to or hung in, or used in connection with, any window of the
demised premises or any outside wall of the Building without the prior written
consent of Landlord, which will not be unreasonably withheld or delayed so long
as said awning or other item conforms to similar items installed in or upon
other portions of the Building. Such awnings, curtains, blinds, shades, screens
or other projections must be of a quality, type, design and color, and attached
in the manner, approved by Landlord. If any portion of the demised premises
which is not used for office purposes shall have windows, such windows shall be
equipped with curtains, blinds or shades approved by Landlord, and curtains,
blinds or shades shall be kept closed said at all times.


         4. The water and wash closets and other plumbing fixtures shall not be
used for any purposes other than those for which they were designed and
constructed, and no sweepings, rubbish, rags, acids, chemicals, process water,
cooling water or like substances shall be deposited therein. Said plumbing
fixtures and the plumbing system of the Building shall be used only for the
discharge of so-called sanitary waste. All damage resulting from any misuse of
said fixtures and/or plumbing system by Tenant or anyone claiming under Tenant
shall be borne by Tenant.

         5. Tenant must, upon the termination of its tenancy, return to Landlord
all locks, cylinders and keys to the demised premises and any offices therein.

         6. Tenant shall keep any sidewalks and planters in front of the demised
premises reasonably free and clear of litter and refuse, regardless of the
source thereof.

         7. Tenant shall, at Tenant's expense, provide artificial light and
electric current for the employees of Landlord and/or Landlord's contractors
while making repairs or alterations in the demised premises.
   46
         8. Tenant shall not make, or permit to be made, any unseemly or
disturbing odors or noises or disturb or interfere with occupants of the
Building or those having business with them, whether by use, of any musical
instrument, radio, machine, or in any other way.

         9. Canvassing, soliciting, and peddling in the Building are prohibited
and Tenant shall cooperate to prevent the same.

         10. Tenant shall keep the demised premises free at all time of pests,
rodents and other vermin, and Tenant shall keep all trash and rubbish stored in
containers of a type approved by Landlord, such containers to be kept at
locations designated by Landlord. Tenant shall cause such containers to be
emptied whenever necessary to prevent them from overflowing or from producing
any objectionable odors.

         11. Landlord reserves the right to rescind, alter, waive and/or
establish any reasonable rules and regulations of uniform application to all
tenants which, in its judgment, are necessary, desirable or proper for its best
interests and the best interests of the occupants of the Building.

         12. The access roads, driveways, entrances and exits shall not be
obstructed or encumbered by Tenant or used for any purpose other than ingress
and egress.
   47
                                    EXHIBIT E

                          (ITEMS INCLUDED IN BUILDING/
                      UTILITY COSTS AND OPERATING EXPENSES)



A.    Without limitation, Building Energy/Utility Costs shall include:

         Costs for electricity, fuel, oil, gas, steam, water and sewer use
         charges and other utilities supplied to the Property and not paid for
         directly by tenants.

B.      Without limitation, Operating Expenses shall include:

         1.       All expenses incurred by Landlord or Landlord's agents which
                  shall be directly related to employment of personnel,
                  including amounts incurred for wages, salaries and other
                  compensation for services, payroll, social security,
                  unemployment and similar taxes, workmen's compensation
                  insurance, disability benefits, pensions, hospitalization,
                  retirement plans and group insurance, uniforms and working
                  clothes and the cleaning thereof, and expenses imposed on
                  Landlord or Landlord's agents in connection with the
                  operation, repair, maintenance, cleaning, and protection of
                  the Property, and its mechanical systems including, without
                  limitation, day and night supervisors, janitors, carpenters,
                  engineers, mechanics, electricians and plumbers and personnel
                  engaged in supervision of any of the persons mentioned above:
                  provided that, if any such employee is also employed on other
                  property of Landlord, such compensation shall be suitably
                  allocated by Landlord among the Property and such other
                  properties.

         2.       The cost of services, materials and supplies furnished or used
                  in the operation, repair, maintenance, cleaning, and
                  protection of the Property including, without limitation, fees
                  and assessments, if any, imposed upon Landlord, or charged to
                  the Property, by any governmental agency or authority or other
                  duly authorized private or public entity on account of public
                  safety services, transit, housing, police, fire, sanitation or
                  other services or purported benefits.

         3.       The cost of replacements for tools and other similar equipment
                  used in the repair, maintenance, cleaning and protection of
                  the Property, provided that, in the case of any such equipment
                  used jointly on other property of Landlord, such costs shall
                  be allocated by Landlord among the Property and such other
                  properties.

         4.       Premiums for insurance against damage or loss to the Building
                  from such hazards as shall from time to time be generally
                  required by institutional mortgagees in the Boston area for
                  similar properties, including, but not by way of limitation,
                  insurance covering loss of rent attributable to any such
                  hazards, and public liability insurance.
   48
                                    EXHIBIT F
                       TENANT'S JANITORIAL SPECIFICATIONS



EACH VISIT

 1.      Empty all trash.

 2.      Replace liners as needed.

 3.      Empty and wash all ashtrays.

 4.      Dust all flat surfaces and cleared desks.

 5.      Clean glass doors.

 6.      Clean kitchen and coffee areas.

 7.      Thoroughly clean restrooms; and restock with soap and paper supplies.

 8.      Vacuum all carpeting.

 9.      Dust mop tile floors.

 10.     Damp mop tile floors.

 11.     Spray buff tile floors: as needed.

 12.     Turn off all lights, lock doors and leave premises in orderly
         condition.


The above services are done on Tuesday, Thursday and Saturday of each week.
   49
 5.      Intentionally Omitted.

 6.      If, during the Term of this Lease, Landlord shall make a capital
         expenditure, the total cost of which is not properly includable in
         Operating Expenses for the Operating Year in which it was made, there
         shall nevertheless be included in such Operating Expenses for the
         Operating Year in which it was made and in Operating Expenses for each
         succeeding Operating Year, an annual charge-off of such capital
         expenditure. The annual charge-off shall be determined by dividing the
         original capital expenditure plus an interest factor, reasonably
         determined by Landlord, as being the interest rate then being charged
         for long-term mortgages, by institutional lenders on like properties
         within the locality in which the Building is located, by the number of
         years of useful life of the capital expenditure, and the useful life
         shall be determined reasonably by Landlord in accordance with generally
         accepted accounting principles and practices in effect at the time of
         making such expenditure.

 7.      Betterment or special assessments provided the same are apportioned
         equally over the longest period permitted by law.

 8.      Amounts paid to independent contractors for services, materials and
         supplies furnished for the operation, repair, maintenance, cleaning and
         protection of the Property.
     
 9.      Management Fees payable to contractors or managers for operation and
         management of the Building.