CSG SYSTEMS INTERNATIONAL INC
8-K, 1996-07-10
COMPUTER PROCESSING & DATA PREPARATION
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<PAGE>
 
                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549



                                    FORM 8-K



                                 CURRENT REPORT


PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934


         Date of Report    (Date of earliest event reported)
          July 10, 1996             (June 28, 1996)


                        CSG SYSTEMS INTERNATIONAL, INC.
            (Exact name of registrant as specified in its charter)

DELAWARE                            0-27512               47-0783182
(State or other jurisdiction     (Commission            (IRS Employer
of incorporation)                File Number)         Identification No.)
 

        5251 DTC Parkway, Suite 625, Englewood, Colorado 80111
         (Address of principal executive offices)   (Zip Code)



Registrant's telephone number, including area code:  (303) 796-2850
<PAGE>
 
ITEM 2.   ACQUISITION OR DISPOSITION OF ASSETS

On June 28, 1996, CSG Systems International, Inc. (the "Company") acquired all
of the capital stock of Bytel Limited, an English company ("Bytel"), from Cray
Systems Ltd. ("Cray") and Digital Equipment Company Ltd ("DEC"). The total
purchase price was approximately $4.7 million consisting of cash payments of
approximately $3.1 million and assumption of certain payables owing by Bytel to
DEC of approximately $1.6 million. The cash payments included payment of certain
receivables owing by Bytel to Cray and payments to Cray pursuant to an
Administration and Development Services Agreement between Bytel and Cray entered
into in connection with the acquisition. The cash portion of the purchase price
was paid out of corporate funds. Bytel provides customer management software
systems to the cable and telecommunications industries in the United Kingdom.


ITEM 7.   FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND
          EXHIBITS

(a)       Financial statements of businesses acquired.

          Audited financial statements of Bytel for the fiscal year ended April
          30, 1996 are currently not available and will be filed as soon as
          practicable, but no later than September 11, 1996.

(b)       Pro forma financial information.

          Pro forma financial information for the Company and Bytel is not
          currently available and will be filed as soon as practicable, but no
          later than September 11, 1996.

(c)       Exhibits.

          The following exhibits are included:

          2.16      Share Purchase Agreement among Cray Systems Ltd., Digital
                    Equipment Company Ltd. and CSG Systems International, Inc.
                    dated June 28, 1996

          2.17      Administration and Development Services Agreement between
                    Cray Systems Ltd. and Bytel Limited dated June 28, 1996

<PAGE>
 
SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.

                                       CSG SYSTEMS INTERNATIONAL, INC.


Dated: July 10, 1996                   By:      /s/ Randy Wiese 
      --------------                      --------------------------------
                                                    Randy Wiese     
                                                     Controller              
                                           (Principal Accounting Officer)
<PAGE>
 
                        CSG SYSTEMS INTERNATIONAL, INC.


                                 EXHIBIT INDEX



Exhibit
Number                            Description
- - - -------                           -----------  

2.16      Share Purchase Agreement among Cray Systems Ltd., Digital Equipment
          Company Ltd. and CSG Systems International, Inc. dated June 28, 1996

2.17      Administration and Development Services Agreement between Cray Systems
          Ltd. and Bytel Limited dated June 28, 1996

<PAGE>
 
                                                                    Exhibit 2.16

                    DATED                             1996
                    --------------------------------------



                             (1) CRAY SYSTEMS LTD.

                    (2)  DIGITAL EQUIPMENT COMPANY LTD. and

                      (3)  CSG SYSTEMS INTERNATIONAL, INC.



                          ____________________________

                            SHARE PURCHASE AGREEMENT
                         _____________________________



                                Baker & McKenzie
                             100 New Bridge Street
                                London EC4V 6JA
                             Tel:  (0171) 919 1000
                             Fax:  (0171) 919 1999
<PAGE>
 
                                  Ref:  MJEH/NRD
<PAGE>
 
                                     INDEX
                                     -----
<TABLE>
<CAPTION>
 
 
<S>        <C>                                   <C>
     1.    DEFINITIONS AND INTERPRETATION.................   1
           ------------------------------
 
     2.    SALE OF SALE SHARES............................   5
           -------------------
 
     3.    PREEMPTION RIGHTS..............................   6
           -----------------
 
     4.    CONSIDERATION..................................   6
           -------------
 
     5.    COMPLETION.....................................   6
           ----------
 
     6.    RESTRICTION OF VENDORS AND PURCHASER...........   8
           ------------------------------------
 
     7.    WARRANTIES.....................................  11
           ----------
 
     8.    VENDOR LIMITATION..............................  13
           -----------------
 
     9.    COVENANT IN RESPECT OF TAX.....................  17
           --------------------------     

     10.   DEC AND CRAY TRADE RECEIVABLES, TRADE CREDITORS  24
           -----------------------------------------------
 
     11.   RESTRICTION ON ANNOUNCEMENTS...................  26
           ----------------------------
 
     12.   COSTS..........................................  26
           -----
 
     13.   GENERAL........................................  26
           -------
 
     14.   NOTICES........................................  28
           -------
 
     15.   GOVERNING LAW AND SUBMISSION TO JURISDICTION...  28
           --------------------------------------------
 
 
     SCHEDULE 1...........................................  30
     ----------   
           Details of the Company.........................  30
 
     SCHEDULE 2...........................................  31
     ----------  
           Cray Invoices..................................  31
 
     SCHEDULE 3...........................................  32
     ----------  
           Warranties.....................................  32
 
     SCHEDULE 4...........................................  38
     ----------  
           The Vendors....................................  38
</TABLE>
<PAGE>

DATE:                 1996

PARTIES:

(1)  CRAY SYSTEMS LIMITED,  a company incorporated in England with registered
     number 1721900 whose principal place of business is at 5 Genesis Business
     Park, Albert Drive, Woking, Surrey  GU21 5RW ("Cray").

(2)  DIGITAL EQUIPMENT CO LIMITED,  a company incorporated in England with
     registered number 800905 whose principal place of business is at Digital
     Park, Imperial Way, Reading, Berkshire RG2 0TE England ("DEC").

(3)  CSG SYSTEMS INTERNATIONAL, INC., a corporation organized under the laws of
     the State of Delaware, USA whose principal place of business is at 5251 DTC
     Parkway, Suite 625, Englewood, Colorado 80111, USA (the "Purchaser").

RECITALS:

(A)  The Vendors are together the registered holders and beneficial owners of
     all of the issued shares in the capital of Bytel Limited ("the Company").
     Particulars of the Company are set out in Schedule 1.

(B)  The Vendors wish to sell and the Purchaser wishes to purchase the said
     shares on the terms and conditions set out in this Agreement.

TERMS AGREED:

1.   DEFINITIONS AND INTERPRETATION
     ------------------------------

1.1  In this Agreement where the context so admits the following words and
     expressions shall have the following meanings:

     "Accounting Date"       April 30, 1996;

                                       1
<PAGE>
 
     "Accounts"                  the audited financial statements of the Company
                                 for the accounting reference period which ended
                                 on the Accounting Date (each such financial
                                 statement comprising a balance sheet, profit
                                 and loss account, notes and directors' and
                                 auditors' report) and the profit and loss
                                 account and balance sheet of the Company as at
                                 and for the period ending on the Accounting
                                 Date;

     "Administration and         the agreement in the approved terms for the
     Development Services        provision by Cray of specified administration
     Agreement"                  and development services to the Company;

     "Associated Companies"      in relation to any company, any company which
                                 is its holding company or a subsidiary of it or
                                 of its holding company, as those terms are
                                 defined in Section 736, as supplemented by
                                 Section 736A of the Companies Act 1985;

     "Auditors"                  Arthur Andersen, 1 Surrey Street, London WC2R
                                 2PS;

     "Companies Acts"            the Companies Act 1985 and the Companies Act
                                 1989;

     "Company"                   Bytel Limited details of which are set out in
                                 Schedule 1;

     "Completion"                completion of the sale and purchase of the Sale
                                 Shares as specified in Clause 5;

     "Completion Date"           the date of this Agreement (or such later date
                                 as the parties may agree);

     "Consideration"             the total consideration for the Sale Shares
                                 being the sum specified in Clause 4;

                                       2
<PAGE>
 
     "Continuing Director"       Mr Chris Musgrave;

     "Cray Loan Assignment"      an assignment of the Cray Shareholder Loan in
                                 the agreed form;

     "Cray Shareholder Loan"     the amount of (Pounds)740,000 provided to the
                                 Company as a loan and which is currently due
                                 and owing to Cray;

     "Cray Trade Receivables"    the trade debts owed by the Company to Cray for
                                 goods, facilities and services provided prior
                                 to the Completion Date;

     "DEC Loan Assignment"       an assignment of the DEC Shareholder Loan in
                                 the agreed form;

     "DEC Shareholder Loan"      the amount of (Pounds)740,000 provided to the
                                 Company as a loan and which is currently due
                                 and owing to DEC;

     "DEC Trade Receivables"     the trade debts of (Pounds)1,031,544 owed by
                                 the Company to DEC for services provided by DEC
                                 prior to the Completion Date;

     "Directors"                 the persons listed as directors of the Company
                                 in Schedule 1;

     "Disclosure Letter"         the letter of today's date from the Vendors'
                                 Solicitors to the Purchaser in the approved
                                 terms;

     "Intellectual Property"     includes patents, know-how, trade secrets and
                                 other confidential information, registered
                                 designs, copyrights, design rights, topography
                                 rights, trade marks, service marks and business
                                 names and the goodwill in such marks and names,
                                 registrations of

                                       3
<PAGE>
 
                                 and applications to register any of the
                                 aforesaid items in any country;

     "Purchaser's Solicitors"    Baker & McKenzie of 100 New Bridge Street,
                                 London EC4 6JA;

     "Sale Shares"               the 50,000 A ordinary shares and the 50,000 B
                                 ordinary shares of (Pounds)1 each in the
                                 capital of the Company;

     "Tax"                       all forms of taxation, withholdings, duties,
                                 imposts, levies, social security contributions
                                 and rates imposed by any local, municipal,
                                 governmental, state, federal, or other body in
                                 the United Kingdom or elsewhere and any
                                 interest, penalty, surcharge or fine in
                                 connection therewith;

     "Taxes Act"                 the Income and Corporation Taxes Act 1988;

     "Tax Warranties"            those warranties contained in paragraph 3 of
                                 Schedule 3;

     "Tenancy Agreement"         the tenancy agreement in the approved terms
                                 between the Company and Cray;

     "Trade Receivables"         the DEC Trade Receivables and the Cray Trade
                                 Receivables;

     "Vendors"                   DEC and Cray;

     "Vendors' Solicitors"       Olswang of 90 Long Acre, London WC2E 9TT;

     "Warranties"                the warranties contained or referred to in
                                 Clause 7 and Schedule 3.

                                       4
<PAGE>
 
1.2  Save where the context otherwise requires, words and phrases the
     definitions of which are contained or referred to in Part XXVI of the
     Companies Act 1985 shall be construed as having the meaning thereby
     attributed to them.

1.3  Any references, express or implied, to statutes or statutory provisions
     shall be construed as references to those statutes or provisions as
     respectively amended or re-enacted or as their application is modified from
     time to time by other provisions (whether before or after the date hereof)
     and shall include any statutes or provisions of which they are 
     re-enactments (whether with or without modification) and any orders,
     regulations, instruments or other subordinate legislation under the
     relevant statute or statutory provision. References to sections of
     consolidating legislation shall wherever necessary or appropriate in the
     context be construed as including references to the sections of the
     previous legislation from which the consolidating legislation has been
     prepared.

1.4  References in this Agreement to Clauses and Schedules are to clauses in and
     schedules to this Agreement (unless the context otherwise requires). The
     recitals and schedules to this Agreement shall be deemed to form part of
     this Agreement.

1.5  Headings are inserted for convenience only and shall not affect the
     construction of this Agreement.

1.6  References to "persons" shall include bodies corporate, unincorporated
     associations and partnerships (whether or not having separate legal
     personality).

1.7  The masculine gender shall include the feminine and neuter and the singular
     number shall include the plural and vice versa.

1.8  A document expressed to be "in the approved terms" means a document the
     terms of which have been approved by or on behalf of the parties to this
     Agreement and a copy of which has been signed for the purposes of
     identification by or on behalf of those parties.

2.   SALE OF SALE SHARES
     -------------------

Subject to the terms of this Agreement, each of the Vendors shall sell with full
title guarantee and the Purchaser shall purchase, free from all liens, charges
and encumbrances and together with all rights now or hereafter attaching to
them, including all rights to any dividend or other distribution declared,

                                       5
<PAGE>

made or paid after the date of this Agreement, the number of Sale Shares set
opposite its name in column 2 of Schedule 5.

3.   PREEMPTION RIGHTS
     -----------------

Each of the Vendors hereby waives and agrees to procure, with respect to their
respective Sale Shares, the waiver of any restrictions on transfer (including
pre-emption rights) which may exist in relation to the Sale Shares, whether
under the articles of association of the Company or otherwise.

4.   CONSIDERATION
     -------------

The total consideration payable for the Sale Shares shall be (Pounds)2, of which
(Pounds)1 shall be the consideration for the 50,000 A ordinary shares of
(Pounds)1 each in the capital of the Company and (Pounds)1 shall be the
consideration for the 50,000 B ordinary shares of (Pounds)1 each in the capital
of the Company.

5.   COMPLETION
     ----------

5.1  Completion shall take place on the date of this Agreement at the offices of
     the Purchaser's Solicitors when all (but not some only) of the events
     described in this Clause 5 shall occur.

5.2  At Completion, the Vendors shall deliver to the Purchaser:

5.2.1     duly executed transfers of all of the Sale Shares in favour of the
          Purchaser or its nominees together with the relative share
          certificates or indemnities satisfactory to the Purchaser in respect
          thereof;

5.2.2     the resignation of the Auditors as the auditors of the Company, such
          resignation to contain a statement in accordance with Section 394 of
          the Companies Act 1985 that there are no circumstances connected with
          their ceasing to hold office which they consider should be brought to
          the attention of the members or creditors of the Company;

5.2.3     all the statutory and other books (duly written up to date) of the
          Company and its certificate of incorporation, common seal and any
          other papers and documents of the Company in its possession or under
          its control;

                                       6
<PAGE>

5.2.4     certified copies of any powers of attorney under which any of the
          documents referred to in this Clause 5.2 is executed or evidence
          satisfactory to the Purchaser of the authority of any person signing
          on behalf of either of the Vendors;

5.2.5     letters of resignation in the approved terms from each of the
          Directors (other than the Continuing Directors) and the secretary of
          the Company, such resignations to take effect from close of the
          meeting of the Directors referred to in Clause 5.3 below;

5.2.6     an executed release under seal, in the approved terms, releasing the
          Company from any liability as specified therein;

5.2.7     an executed release, in the approved terms, releasing the Company
          from any liability, including any liability as specified therein;

5.2.8     the Administrative and Development Services Agreement and the
          Tenancy Agreement, both executed by Cray;

5.2.9     certified copies of the Accounts;

5.2.10    the Cray Loan Assignment and the DEC Loan Assignment duly executed
          by Cray and DEC respectively.

5.3  At Completion, the Vendors shall cause the Directors to hold a meeting of
     the board of directors the Company at which the Directors shall pass
     resolutions in the approved terms (inter alia) to:-

5.3.1     approve the registration of the Purchaser or its nominees as members
          of the Company subject only to the production of duly stamped and
          completed transfers in respect of the Sale Shares;

5.3.2     appoint such persons as the Purchaser may nominate as directors and
          secretary of the Company and accept the resignation of the Directors
          (excluding the Continuing Director) and secretary;

                                       7
<PAGE>

5.3.3     revoke all authorities to the bankers of the Company relating to
          bank accounts and to give authority to such persons as the Purchaser
          may nominate to operate the same; and

5.3.4     approve entry by the Company in to the Administrative and
          Development Services Agreement and the Tenancy Agreement.

5.4  At Completion, the Purchaser shall:

5.4.1     pay the Consideration to the Vendors;

5.4.2     that the Company makes payment to Cray of those Cray Trade
          Receivables payable on Completion in accordance with the provisions of
          Clause 10.1;

5.4.3     enter into the Cray Loan Assignment and the DEC Loan Assignment.

5.5  The Purchaser shall place the Company in funds to make th e payments of the
amounts specified in Clause 5.4.1 to 5.4.3 (inclusive) which shall be by way of
telegraphic transfer to the bank account of the Vendor's Solicitors (whose
conformation of receipt shall be an absolute discharge therefor and the
Purchaser shall not be concerned to see to the distribution of moneys
represented thereby).

5.6  At Completion Cray shall sell (free from all liens, charges and
     encumbrances) and the Company shall purchase the Vax Development Machine
     (serial number AY 321 V 3041) for the sum of (Pounds)1. In consideration of
     the sale the Purchaser agrees to discharge all maintenance obligations in
     respect of the machine under a maintenance agreement dated with Digital
     numbered 7DZ 21575E except insofar as such obligations should have been
     performed before the Completion Date.


6.   RESTRICTION OF VENDORS AND PURCHASER
     ------------------------------------

6.1  Cray hereby undertakes with the Purchaser (for itself and as trustee for
     the Company) that, except with the consent in writing of the Purchaser
     (such consent not to be unreasonably withheld or delayed) and subject to
     the provisions of Clause 6.2, that it shall not and shall procure that
     each of its Associated Companies shall not:

                                       8
<PAGE>

6.1.1     for the period of 18 months after the Completion Date, within any
          country in which the Company has carried on business during the year
          preceding the Completion Date, either on its own account or in
          conjunction with or on behalf of any person, firm or company, carry on
          or be engaged, concerned or interested, directly or indirectly whether
          as shareholder, director, partner, agent or otherwise in carrying on
          the businesses set out in clause 6.1.1.1 and 6.1.1.2 (other than as a
          holder of not more than 5 percent of the issued shares or debentures
          of any company listed on a stock exchange):

6.1.1.1        develop a software based integrated customer care/billing system
               designed for use in the cable telecoms market; and

6.1.1.2        market or promote a software based integrated customer
               care/billing system designed for use in the cable telecoms
               market;

               (together "Restricted Business") and for the avoidance of doubt
               "cable telecoms" shall mean the provision of telephony and/or
               cable television by a cable television operator through its cable
               network PROVIDED THAT nothing in this Clause 6.1 shall prevent or
               restrict Cray from:

6.1.1.3        developing, selling, supplying or licensing its software product
               known as "ABS" (or any version, development or derivative of it)
               as a component part of a software product, package or solution
               offered by any third party for use in the cable telecoms market
               and the telecoms market;

6.1.1.4        providing consultants for use in the cable telecoms market;

6.1.1.5        acquiring any interest or interests in any company or companies
               which carry on or are engaged in or have any interest in the
               Restricted Business provided that:

               (i)  the aggregate turnover represented by the Restricted
                    Business comprises no more than 15% of the total turnover in
                    any such company or group of companies; and

                                       9
<PAGE>

               (ii) at any subsequent time the Restricted Business does not
                    account for more than 10% of the aggregate annual turnover
                    of Cray and any of its associated companies.

6.1.2     for the period of eighteen months after the Completion Date, either
          on its own account or in conjunction with or on behalf of any other
          person, firm or company, solicit or entice away or attempt to solicit
          or entice away from the Company the custom of any person, firm,
          company or organisation who shall at any time within the year
          preceding the Completion Date have been a customer, or identified
          prospective customer, of the Company or in the habit of dealing with
          the Company,

6.1.3     for the period of two years after the Completion Date, either on
          its own account or in conjunction with or on behalf of any other
          person, firm or company, solicit, entice away or attempt to solicit or
          entice away from the Company any person who at the date hereof is or
          at the date of or within the year preceding such employment,
          solicitation, enticement or attempt shall have been an officer,
          manager, consultant or employee of the Company, whether or not such
          person would commit a breach of contract by reason of leaving such
          employment;

6.1.4     at any time hereafter make use of or disclose or divulge to any
          person (other than to officers or employees of the Company whose
          province it is to know the same) any information (other than any
          information properly available to the public or in the public domain
          or disclosed or divulged pursuant to an order of a court of competent
          jurisdiction [or as requested by any regulatory authority]) relating
          to the Company, the identity of its customers and suppliers, its
          products, finance, contractual arrangements, business or methods of
          business and shall use all reasonable endeavours to prevent the
          publication or disclosure of any such information by persons within
          its actual control; or

6.1.5     at any time hereafter in relation to any trade, business or company
          use a name or trade mark (including, but not limited to, the word
          "Bytel" or any word confusingly similar thereto) in such a way as to
          be capable of or likely to be confused with the name or any trade mark
          of the Company.

6.2  While the restrictions contained in this Clause are considered by the
     parties to be reasonable in all the circumstances, it is recognised that
     restrictions of the nature in

                                       10
<PAGE>

     question may fail for technical reasons and accordingly it is hereby agreed
     and declared that if any of such restrictions shall be adjudged to be void
     as going beyond what is reasonable in all the circumstances for the
     protection of the interests of the Purchaser but would be valid if part of
     the wording thereof were deleted or the periods thereof reduced or the
     range of activities or area dealt with thereby reduced in scope the said
     restriction shall apply with such modifications as may be necessary to make
     it valid and effective.

6.3  Other than in respect of offers to Bytel Development Employees as defined
     in the Administration and Development Services Agreement for the period of
     two years after the Completion Date, the Purchaser shall not and shall
     procure that the Company shall not for its own account or for any person,
     firm or company directly or indirectly solicit or entice away or endeavour
     to solicit or entice away any person who has during the 12 months prior to
     Completion been an employee of Cray.

7.   WARRANTIES
     ----------

7.1  Cray hereby warrants to and with the Purchaser that each of the statements
     set out in Schedule 3 is true and accurate.

7.2  DEC hereby warrants to and with the Purchaser that the statements set out
     in paragraphs 1.2 and 3.2 in Schedule 3 are true and accurate.

7.3  The Warranties are given subject to:

7.3.1     matters disclosed in reasonable detail in the Disclosure Letter (and
          documents attached thereto).  Subject as expressly provided in this
          Agreement no letter, document or other communication shall be deemed
          to constitute a disclosure for the purposes of this Agreement no other
          information relating to the Company of which the Purchaser has
          knowledge (actual or constructive) and no investigation by or on
          behalf of the Purchaser shall prejudice any claim made by the
          Purchaser under the Warranties or operate to reduce any amount
          recoverable;

7.3.2     matters disclosed in reasonable detail in written material Cray can
          prove beyond reasonable doubt was provided by the Vendors to the
          Purchaser prior to Completion; and

                                      11
<PAGE>

7.3.3     all matters which Cray can prove beyond reasonable doubt that the
          Purchaser was aware of at Completion which were a result of its
          discussions with any one or more of the Company's customers.

7.4  The Vendors acknowledge that the Purchaser has entered into this Agreement
     in reliance upon the Warranties respectively given by them.  The
     Purchaser confirms that so far as it is aware none of the Company's
     customers have prior to the date of this Agreement provided information
     to the Purchaser which would constitute a breach of any of the
     Warranties.

7.5  Without restricting the rights of the Purchaser or otherwise affecting the
     ability of the Purchaser to claim damages on any other basis available to
     it, in the event that any of the Warranties given by Cray or DEC is
     broken or (as the case may be) proves to be untrue or misleading, DEC or
     Cray (as the case may be) shall, pay to the Purchaser or, at the
     Purchaser's direction (provided that the amount to be paid shall not be
     increased by reason of any such direction or omission to make such
     direction) the Company:

7.5.1     the amount reasonably necessary to put the Company into the position
          which would have existed if the Warranties had not been broken or (as
          the case may be) had been true and not misleading; and

7.5.2     all reasonable costs and expenses properly incurred by the
          Purchaser, and the Company as a result of such breach and any
          reasonable costs (including reasonable legal costs), expenses or other
          liabilities which any of them may properly and reasonably incur after
          the commencement of any action in connection with (i) any legal
          proceedings in which the Purchaser claims that any of the Warranties
          has been broken or is untrue or misleading and in which judgment is
          given for the Purchaser or (ii) the enforcement of any settlement of,
          or judgment in respect of, such claim.  Cray shall be entitled, at its
          expense, to take full conduct of (without limitation) determining the
          existence and nature of, commencing, handling, negotiating, issuing
          proceedings in respect of, settling or obtaining and enforcing
          judgment for all claims against any third party in the Company's name
          upon the provision by the Purchaser of such reasonable assistance as
          Cray may require provided that Cray shall indemnify the Purchaser for
          any reasonable costs, claims, expenses, losses or damages incurred by
          the Purchaser in providing such assistance.

                                       12
<PAGE>

7.6  Each of the Warranties shall be separate and independent and, save as
     expressly provided to the contrary, shall not be limited by reference to
     or inference from any other Warranty or any other term of this Agreement.

7.7  Where any statement in the Cray Warranties is qualified by the expression
     "so far as Cray is aware" or "to the best of Cray's knowledge and belief"
     or any similar expression, that statement shall be deemed to include the
     knowledge of any directors of Cray and shall be deemed to include an
     additional statement that Cray has made due and careful enquiry of Chris
     Musgrave and (so far as the warranties at paragraphs 5, 6 and 7 of
     Schedule 3 only) Lawrence Green.

7.8  Each of the Vendors hereby agrees with the Purchaser (for itself and as
     trustee for the Company) to waive any rights which it may have in respect
     of any misrepresentation or inaccuracy in, or omission from, any
     information or advice supplied or given by the Company or any of its
     employees or advisers in connection with the giving of the
     Warranties and the preparation of the Disclosure Letter.

7.9  If any sum payable by the Vendors under this Clause 7 is subject to Tax
     (whether by way of deduction or withholding or direct assessment of the
     person entitled thereto) such payment shall be increased by such an
     amount as shall ensure that after deduction, withholding or payment of
     such Tax and after taking into account any savings, deductions, reliefs
     or reclaims available to the Purchaser or the Company by reason of the
     claim in respect of which the payment is being made the recipient shall
     have received a net amount equal to the payment otherwise required hereby
     to be made.

8.   VENDOR LIMITATION
     -----------------

8.1  The liabilities of Cray under the Cray Warranties:-

8.1.1     shall, save in relation to the Tax Warranties cease on the second
          anniversary of the Completion Date except in respect of matters which
          have been the subject of a bona fide written claim specifying the
          subject matter and nature of the claim made before such date by the
          Purchaser or the Purchaser's Solicitors to either of the Vendors or
          the Vendors' Solicitors;

                                      13
<PAGE>

8.1.2     shall in relation to the Tax Warranties cease on the seventh
          anniversary of the Completion Date except in respect of matters which
          have been the subject of a bona fide written claim made before such
          date by the Purchaser or the Purchaser's Solicitors to either of the
          Vendors or the Vendors' Solicitors.

8.2  The liability of Cray for breach of the Cray Warranties and for breach of
     the covenants contained in Clause 9 shall be limited to a maximum aggregate
     amount of (Pounds)800,000, unless in each case the relevant claim or claims
     has arisen by reason of fraud, wilful concealment, dishonesty or deliberate
     non-disclosure on the part of Cray, or on the part of any officer,
     employee, adviser or representative of the Company prior to the date of
     this Agreement, in which event there shall be no limit on the amount
     recoverable by the Purchaser from Cray in respect of such claim or claims
     or the time period within which such claims may be brought and none of the
     limitations set forth in this Clause 8 shall apply.

8.3  Cray shall not be liable for breach of the Cray Warranties or pursuant to
     the covenants contained in Clause 9:

8.3.1     unless the liability of Cray for all claims (or what would be such
          liability apart from this Clause) exceeds in the aggregate
          (Pounds)50,000 and in that event Cray shall be liable for the whole
          amount and not merely the excess;

8.3.2     in respect of a claim for less than (Pounds)5,000.

8.4  If Cray is liable to the Purchaser under the Cray Warranties or pursuant to
     the covenants contained in Clause 9 by reason of an obligation of the
     Company to pay advance corporation tax or any sum recoverable from the
     Company as if it were advance corporation tax the liability of the Vendors
     shall be reduced and the amount paid to the Purchaser in respect of such
     liability shall be refunded when and to the extent that the Company obtains
     the benefit of a reduction in liability to mainstream corporation tax by
     reason of such payment and the Purchaser shall procure that the Company
     makes all such claims and elections as will result in such benefit being
     obtained as soon as reasonably possible.

8.5  If Cray is liable to the Purchaser under the Cray Warranties or pursuant to
     the covenants contained in Clause 9 in respect of an obligation of the
     Company to pay tax under the

                                      14
<PAGE>

     provisions of Section 419 ICTA 1988 the liability of Cray shall be reduced
     and any amounts paid to the Purchaser in respect of such liability shall be
     refunded when and to the extent that the Company is entitled to relief
     under sub-section (4) of that section and the Purchaser shall procure that
     the Company makes all necessary claims under that sub-section as soon as
     reasonably possible.

8.6  If Cray pays to the Purchaser or the Company an amount pursuant to a claim
     in respect of Cray Warranties other than the Tax Warranties and the
     Purchaser or the Company subsequently recovers from a third party an amount
     which is referable to that claim the Purchaser shall or shall procure that
     the Company shall immediately repay to Cray so much of the amount paid by
     Cray as does not exceed the amount recovered from the third party less all
     costs, charges and expenses incurred by the Purchaser or the Company in
     obtaining that payment and in recovering that amount from the third party
     and any applicable tax.

8.7  The Vendors shall be entitled to settle any claim under this Agreement and
     Warranties or pursuant to the covenants contained in Clause 9 by
     payment to the Company in cash.

8.8  Any payment made to the Purchaser by the Vendors pursuant to any breach of
     this Agreement or the Warranties and/or to the Company pursuant to the
     covenants contained in Clause 9 shall constitute a reduction in the
     purchase price of the Sale Shares.

8.9  The Purchaser shall not be entitled to recover twice in respect of the same
     subject matter under both the Tax Warranties and the covenants contained
     in Clause 9.

8.10 Cray shall not be liable in respect of any claim for breach of the Cray
     Warranties if such claim::

8.10.1    occurs or arises as a result of any change or changes in legislation
          made after the date of this Agreement or the withdrawal of any extra-
          statutory concession made by the Inland Revenue which has
          retrospective effect;

8.10.2    ccurs or arises as a result of or is otherwise attributable to a
          voluntary act or omission occurring after Completion of the Purchaser
          or the Company (other than pursuant to a legally binding commitment
          created before Completion) and which is

                                      15
<PAGE>
 
          otherwise than in the ordinary course of business and such act or
          omission could have reasonably been avoided;

8.10.3    arises as a result only of any changes in the accounting policies of
          the Company adopted after Completion;

8.10.4    arises as a result of any provision or reserve made in respect of it
          in the Accounts being insufficient by reason of any increase in the
          rates of taxation made after the date of this Agreement having
          retrospective effect or arises as a result of the retrospective
          imposition of taxation as a consequence of a change in the law enacted
          after the date of this Agreement;


8.10.5    would not have arisen but for any claim, election, surrender or
          disclaimer made or omitted to be made or notice or consent given or
          omitted to be done by the Company or the Purchaser otherwise than at
          the request of the Vendors, particulars of which are set out in the
          Disclosure Letter, under the provisions of any enactment relating to
          Tax, after Completion;

8.11 The Purchaser shall procure that upon service of any notice to the Vendors
     of any claim to which any of the Warranties or the covenants contained in
     Clause 9 may relate the Company shall take such action as the Vendors may
     reasonably request to avoid, dispute, resist, appeal, compromise or defend
     a claim in relation to a third party subject to the Company and the
     Purchaser being indemnified and secured to its reasonable satisfaction by
     the Vendors against all losses, costs, damages and expenses thereby
     incurred.

8.12 The Purchaser shall take or procure that the Company shall take all
     reasonable steps necessary to mitigate any loss in relation to any such
     action or claim.

8.13 The provisions of this Clause 8 shall apply to limit the liabilities of DEC
     under the DEC Warranties and the covenants contained in Clause 9 mutatis
     mutandis.

                                      16
<PAGE>
 
9.   COVENANT IN RESPECT OF TAX
     --------------------------

9.1  In this clause unless the context otherwise requires:

9.1.1     "event" means any omission, event, action or transaction whether or
          not the Company is a party thereto, the death of any person, a change
          in the residence of any person for any Tax purpose, a failure to make
          sufficient dividend payments to avoid an apportionment or deemed
          distribution of income and the entering into and completion of this
          Agreement and references to the result of events on or before the
          Completion Date shall include the combined result of two or more
          events one or more of which shall have taken place on or before the
          Completion Date; PROVIDED THAT with respect to the event or events
          which take or takes place after the Completion Date neither the
          Purchaser or the Company could have reasonably foreseen that the event
          could give rise to a claim under this Deed but this proviso shall not
          apply to the extent that the event taking place after the Completion
          Date was carried out pursuant to an obligation of the Company entered
          into before Completion or was carried out with the approval,
          concurrence or assistance or at the request or direction of the
          Vendors.

9.1.2     "relief" means any relief, allowance, credit, set off, deduction or
          exemption for any Tax purpose;

9.1.3     reference to income or profits or gains earned, accrued or received
          shall include income or profits or gains deemed to have been or
          treated as or regarded as earned, accrued or received for the purposes
          of any legislation;

9.1.4     reference to any Tax liability shall include not only any liability to
          make actual payments of or in respect of Tax but shall also include:

9.1.4.1        the loss or reduction in the amount of, or the setting off
               against any Tax liability for which no provision has been made in
               preparing the Accounts, of a right to repayment of Tax which has
               been treated as an asset of the Company in preparing the
               Accounts; and

                                      17
<PAGE>
 
9.1.4.2        the loss or reduction in the amount of, or the setting off
               against income, profits or gains earned, accrued or received on
               or before Completion, or against any Tax liability of any relief
               which is not available before Completion but which arises in
               respect of an event occurring after Completion in circumstances
               where, but for such loss, reduction or setting off, the Company
               would have had a Tax liability in respect of which the Purchaser
               would have been able to make a claim under this clause 9;

          and in such a case the amount of Tax which would otherwise be payable
          but for the relief so lost, reduced or set off or the amount of
          repayment which would otherwise have been obtained shall be treated as
          the amount of a Tax liability which has arisen;

9.1.5     reference to a payment in respect of Tax includes (without limitation)
          a payment for the surrender of losses or other amounts by way of group
          relief (within the meaning of Section 402 of the Taxes Act) or for the
          surrender of advance corporation tax or for the transfer of any other
          relief and a repayment of any such payment.

9.2  Subject as hereinafter provided, the Vendors hereby severally covenant with
     and undertake to pay to the Purchaser a sum equal to the amount of:

9.2.1     any Tax liability of the Company resulting from or by reference to any
          income, profits or gains earned accrued or received on or before the
          Completion Date or any event on or before the Completion Date and
          whether or not such Tax is chargeable against or attributable to any
          other person;

9.2.2     any Tax liability of the Company that arises after Completion as a
          result of an act, omission or transaction by a person other than the
          Company and which liability to Tax falls upon the Company as a result
          of its having been in the same group for Tax purposes as that person
          at any time before Completion; and

9.2.3     all costs and expenses which are reasonably incurred by the Purchaser
          or the Company in connection with any claim under this clause 9
          (including, without prejudice to the generality of the foregoing, all
          legal and other professional fees and disbursements).

9.3  The covenants contained in clause 9.2 do not apply to any liability:

                                      18
<PAGE>
 
9.3.1     to the extent that provision or reserve in respect thereof has been
          made in the Accounts or to the extent that payment or discharge of
          such liability has been taken into account therein; or

9.3.2     in respect of which provision or reserve has been made in the Accounts
          which is insufficient only by reason of any increase in rates of Tax
          made after the Completion Date with retrospective effect; or

9.3.3     to the extent that it was discharged (whether by payment or by the
          utilisation of any relief) prior to Completion and details of such
          discharge have been provided to the Purchaser prior to Completion; or

9.3.4     which arises or is increased as a result only of any change in
          applicable law or published Inland Revenue practice made after the
          date of this Agreement which takes effect retrospectively; or

9.3.5     where recovery has been made in respect of the matter giving rise to
          such liability by the Purchaser under the warranties contained in this
          Agreement; or

9.3.6     to the extent that such liability would not have arisen but for, or is
          increased by, any voluntary act or transaction which could reasonably
          have been avoided and which was not carried out pursuant to an
          obligation entered into before Completion, of the Company after
          Completion otherwise than in the ordinary course of business and which
          the Purchaser was aware or ought reasonably to have been aware could
          give rise to such a claim, but this exclusion shall not extend to any
          voluntary act carried out with the approval, concurrence or assistance
          or at the request or direction of the Vendors; or

9.3.7     to the extent that such liability would not have arisen but for, or
          has been increased by:

          (a)  a disclaimer, claim or election made or notice or consent given
               after Completion by the Purchaser or the Company otherwise than
               at the request of the Vendors under the provisions of this
               Agreement; or

                                      19
<PAGE>
 
           (b) a failure or omission by the Company to make any claim, election,
               surrender or disclaimer or give any notice or consent or do any
               other thing under the provisions of any enactment relating to
               Tax, particulars of which are set out in the Disclosure Letter
               with reference to this clause 9.3.6, after Completion the making,
               giving or doing of which was taken into account in computing the
               provision for Tax in the Accounts; or

9.3.8     to the extent that such liability arises as a result only of any
          changes in the accounting policies of the Company adopted after
          Completion save where the change in the treatment is effected as a
          result of the prior treatment not being in accordance with generally
          accepted accounting principles; or

9.3.9     to the extent that the liability is in respect of VAT which has been
          charged and a tax invoice issued but which has not yet been accounted
          for to HM Customs & Excise, and details of which have been provided to
          the Purchaser; or

9.3.10    which arises in the ordinary course of business of the Company since
          the Accounting Date.


9.4  If the Purchaser becomes aware of any assessment, notice, demand or other
     document issued or action taken by or on behalf of any person, authority or
     body from which it appears that the Company has or may have a liability in
     respect of which a claim could be made under this clause 9, it shall give
     written notice thereof to the Vendors, as soon as reasonably practicable,
     or if an assessment has been issued within 10 business days and shall (if
     the Vendors shall indemnify the Purchaser and the Company to the
     Purchaser's reasonable satisfaction against any liabilities, costs, damages
     or expenses which may be incurred thereby) take such action and procure
     that the Company shall take such action as the Vendors may reasonably
     request to dispute, resist or compromise the liability; provided that
     neither the Company nor the Purchaser shall be required to take any such
     action unless the Vendors shall have produced to them the opinion of
     leading Counsel practising in the relevant area of law that such action is
     reasonable.

9.5  The liability of the Vendors under this clause shall cease on the seventh
     anniversary of the Completion Date except in respect of matters which have
     been the subject of a written claim made within the said period by the
     Purchaser to either of the Vendors or the

                                      20
<PAGE>
 
     Vendors' Solicitors unless the claim in question has arisen by reason of
     fraud, wilful concealment, dishonesty or deliberate nondisclosure on the
     part of either or both of the Vendors or the Company whilst under the
     control of the Vendors or on the part of any officer, employee, adviser or
     representative of the Company whilst under the control of the Vendors or of
     either or both of the Vendors, in which event there shall be no contractual
     limit on the time period within which such claim may be brought.

9.6  The due date for the making of payments under this clause 9 shall be:-

9.6.1     where the payment relates to a liability of the Company to make an
          actual payment of or in respect of Tax, the date which is four days
          before the date on which such actual payment is due to be made to the
          relevant authority;

9.6.2     where the payment relates to a matter falling within clause 9.1.4.2,
          the date falling seven days after the Vendors have been notified by
          the Purchaser that the auditors for the time being of the Company have
          certified at the request of the Purchaser or the Company that the
          Vendors have a liability for a determinable amount under Clause 9.2;
          and

9.6.3     where the payment relates to a matter falling within Clause 9.1.4.1
          the date on which the repayment of Tax would otherwise have been due
          to be made; and

9.6.4     in the case of costs and expenses within Clause 9.2.3 the date on
          which such costs and expenses are incurred.

9.7  If any payment due to be made under this Clause 9 is not made on the due
     date for payment thereof the same shall carry interest from such due date
     of payment until actual payment at the rate of 2 per cent above the base
     rate from time to time of Lloyds Bank PLC, compounded on the last days of
     March, June, September and December in each year.

9.8  If any sum payable under this clause 9 (other than interest under clause
     9.7) is subject to Tax (whether by way of deduction or withholding or
     direct assessment of the person entitled thereto) such payment shall be
     increased by such an amount as shall ensure that after deduction,
     withholding or payment of such Tax the recipient shall have received a net
     amount equal to the payment otherwise required hereby to be made.

                                      21
<PAGE>
 
9.9  The Vendors shall give all such assistance and provide such information as
     the Purchaser shall reasonably request from time to time for the purpose of
     enabling the Purchaser or the Company to make returns and provide
     information as required to any Tax authority and to negotiate any liability
     to Tax.

9.10 The Purchaser undertakes that it shall not, after Completion, take any
     action or enter into any transaction relating to the business, assets or
     undertaking of the Company, the effect of which will or may be to render
     the Company unable to meet any corporation tax liability to the extent that
     provision or reserve in respect thereof has been made in the Accounts and
     the Purchasers agrees to indemnify the Vendors against any liability of the
     Vendors under Section 767A of the Taxes Act for such corporation tax (any
     related interest, penalties or expenses) incurred as a result of the
     Company being unable to meet any such corporation tax liability for which
     provision or reserve has been made as aforesaid.

9.11.1  If the auditors for the time being of the Company shall certify (at the
        request and expense of the Vendors) that any provision for Tax in the
        Accounts (excluding any provision for deferred tax) has proved to be an
        over-provision (including, without prejudice to the generality of the
        foregoing, any case where the Company receives any payment of any Tax
        that was paid by it in respect of any period ending on or before
        Completion, then the amount of such over-provision shall be dealt with
        in accordance with clause 9.11.3 except in so far as such over-provision
        is attributable to the effect of a change in rates of Tax after the date
        hereof.

9.11.2  If the auditors for the time being of the Company shall certify (at the
        request and expense of the Vendors) that any Tax liability which has
        resulted in a payment having been made or becoming due from the Vendors
        under this Deed will give rise to a relief for the Company which would
        not otherwise have arisen, and shall further certify the value of that
        relief (taking account of timing differences), the amount so certified
        shall be dealt with in accordance with clause 9.11.3.

9.11.3  Where it is provided under clause 9.11.1 or 9.11.2 that any amount (the
        "Relevant Amount") is to be dealt with in accordance with this clause:

9.11.3.1  the Relevant Amount shall first be set against any payment then due
          from the Vendors under clause 9 of this Agreement; and

                                      22
<PAGE>
 
9.11.3.2  to the extent that there is an excess, a refund shall be made to the
          Vendors of any previous payment or payments made by the Vendors under
          clause 9 of this Agreement and not previously refunded under this
          clause 9 up to the amount of such excess; and

9.11.3.3  to the extent that the excess referred to in clause 9.10.3.2 is not
          exhausted under that clause, the remainder of that excess shall be
          carried forward and set against any future payment or payments which
          become due from the Vendors under clause 9 of this Agreement.

9.11.4    When any such certification as is mentioned in clause 9.11.1 or 9.11.2
          has been made, the Vendors or the Purchaser or the Company may request
          the auditors for the time being of the Company to review such
          certification in the light of all relevant circumstances, including
          any facts which have become known only since such certification, and
          to certify whether such certification remains correct or whether, in
          the light of those circumstances, the amount which was the subject of
          such certification should be amended.

9.11.5    If the auditors certify under this clause 9.11 that an amount
          previously certified should be amended, that amended amount shall be
          substituted for the purposes of clause 9.11.3 as the Relevant Amount
          in respect of the certification in question in place of the amount
          originally certified and such adjusting payment (if any) as may be
          required by virtue of that substitution shall be made as soon as
          practicable by the Vendors to the Purchaser or (as the case may be) by
          the Purchaser to the Vendors.

9.12 If the Vendors shall become liable to make any payment under this clause 9
     the Vendors may at their option and wholly or partly instead of making a
     payment under clause 9.2 of this Deed surrender or procure the surrender
     (without payment) to the Company of consortium relief (as defined in
     Section 402 of the Taxes Act) or advance corporation tax in order to
     eliminate or reduce the liability to make the payment of Tax which has
     given rise to the claim. The Purchaser shall procure that the Company
     shall, at the Vendors' expense, take without delay (and in any event within
     any applicable statutory time limit) all such steps as may reasonably be
     required by the Vendors to facilitate or permit the surrender of consortium
     relief or advance corporation tax mentioned above provided always that such
     steps shall be taken before any claim is made by the Company under

                                      23
<PAGE>
 
     Section 393A of the Taxes Act in respect of any relief which is not
     available before Completion but which arises in respect of an event which
     arises after Completion.

9.13 If the Vendors shall have paid an amount under this clause 9 and the
     Company or the Purchaser is entitled or may be entitled either immediately
     or at some subsequent date to recover from some other person (including any
     taxing or other competent authority but not including the Purchaser or the
     Company) any sum in respect of any Tax as is mentioned in this clause 9 the
     Purchaser shall or shall procure that the Company shall notify the Vendors
     within a reasonable period of that fact and (if so required by the Vendors
     and at the Vendors' expense) take all appropriate steps to enforce such
     recovery (keeping the Vendors fully informed of the progress of any action
     taken). The Purchaser shall pay within 10 business days to the Vendors any
     amount equal to any amount so recovered (so far as it does not exceed the
     amount paid by the Vendors hereunder in respect of the aforementioned
     liability under this clause 9) plus any interest or repayment supplement
     paid by the taxing or other competent authority or other person on or in
     respect thereof.

9.14 The provisions of this clause 9 shall apply (mutatis mutandis) to claims
     under the Tax Warranties.

10.  DEC AND CRAY TRADE RECEIVABLES, TRADE CREDITORS
     -----------------------------------------------

10.1 The Purchaser shall procure that the Company pay to Cray the amount of the
     Cray Trade Receivables. The Purchaser shall procure payment by the Company
     on the Completion Date of the sum of (Pounds)972,584 (being the amount
     represented by those invoices listed in Schedule 2 which are dated on or
     before 30 April 1996). The Purchaser shall procure that the Company pay the
     remaining Cray Trade Receivables (up to a maximum, after the payment
     referred to above of (Pounds)1 million) within 30 days of the relevant
     invoice date.

10.2 Notwithstanding Clause 10.1, the Purchaser reserves the right, at any time,
     to require reasonable written evidence from Cray to support the amount of
     any Cray Trade Receivable invoices and the Purchaser shall not be required
     to settle any such invoice which is not in connection with goods,
     facilities or services provided in the ordinary course of business between
     Cray and the Company and in accordance with prior practice.

10.3 The Purchaser shall procure that the Company pay to DEC the amount of the
     DEC Trade Receivables, such amount to be paid in 12 equal monthly
     instalments of (Pounds)85,962 with the

                                      24
<PAGE>
 
     first instalment being paid on the day 30 days from the Completion Date and
     then on the same day in each month for the following 11 months. If payment
     of any instalment is not paid within 7 days of its due date then all
     outstanding amounts in respect of the DEC Trade Receivables shall become
     immediately payable by the Company.

10.4 Without prejudice to its obligations under Clauses 10.1 and 10.3 the
     Purchaser shall exercise all its powers in relation to the Company so as to
     procure that the trade creditors (other than DEC and Cray) of the Company
     at the Completion Date are paid when due subject only to the prudent
     conduct of the Company's business. Without prejudice as aforesaid nothing
     in this Clause 10.4 shall be deemed to require the Purchaser to subscribe
     for additional shares in the Company, to make any loan to the Company or to
     give any guarantee to any third party in respect of any obligation of the
     Company.

10.5 Cray covenants with the Purchaser that the Cray Shareholder Loan is not a
     debt the release of which will or may give rise to a liability to Tax under
     section 94 Taxes Act.

10.6 DEC covenants with the Purchaser that the DEC Shareholder Loan is not a
     debt the release of which will or may give rise to a liability to Tax under
     section 94 Taxes Act.

10.7 Cray and the Purchaser hereby agree that forthwith upon the grant of an
     Order pursuant to Section 38(4) of the Landlord and Tenant Act 1954 (as
     amended) authorising the same they will procure the execution and
     completion by Autofile Limited and the Company respectively of a Tenancy
     Agreement in respect of premises at 712 Banbury Road Slough Berkshire in
     the form agreed engrossments of which have been issued to a the parties and
     that pending the completion of such Tenancy Agreement the Company will be
     permitted to remain in occupation of the said premises as licensee on the
     terms and conditions set out in the said Tenancy Agreement and in the event
     that for any reason such Court Order is not made within three months of the
     date of this Agreement such licence shall determine and the Purchaser shall
     procure that the Company vacates the said premises within ten working days
     of being requested so to do by Autofile Limited.

10.8.1    Subject to clause 10.8.2, DEC shall continue, on its standard terms,
          to make available to the Company and authorise the Company to continue
          to use in its business (but not in connection with or for supply to
          third parties) all hardware and associated operating systems
          originally supplied to the Company by DEC, whether the rights to such
          hardware or operating systems are owned by DEC or DEC has the right to

                                      25
<PAGE>
 
          licence the same ("DEC Hardware"), and to facilitate such continued
          use, DEC shall offer to provide maintenance and support in respect of
          the DEC Hardware on its standard terms.

10.8.2    In the case of the products or services which the Company is
          authorised to supply to third parties under the Digital Systems Value
          Added Reseller Agreement dated 29 May 1996 ("DEC VAR Agreement"), DEC
          shall continue to provide the products and any maintenance and support
          provided for under the DEC VAR Agreement in accordance with the terms
          of that agreement as amended or supplemented as agreed by the Company
          and DEC.

10.9      The Vendors hereby represent and warrant to the Purchaser that the
          Accounts shall be in exactly the same form and content as the draft
          accounts of the Company for the financial year ending on the
          Accounting Date as annexed to the Disclosure Letter.

11.  RESTRICTION ON ANNOUNCEMENTS
     ----------------------------

Each of the parties to this Agreement undertakes that it will not (save as
required by law or by any securities exchange or any supervisory or regulatory
body to whose rules any party to this Agreement is subject) make any
announcement in connection with this Agreement unless the other parties shall
have given their respective consents to such announcement (which consents may
not be unreasonably withheld or delayed and may be given either generally or in
a specific case or cases and may be subject to conditions).

12.  COSTS
     -----

12.1      Each party to this Agreement shall pay its own costs of and incidental
          to this Agreement and the sale and purchase hereby agreed to be made.

12.2      The Vendors jointly and severally confirm that no expense of whatever
          nature relating to the sale of the Sale Shares has been or is to be
          borne by the Company.

13.  GENERAL
     -------

13.1      This Agreement shall be binding upon and enure for the benefit of the
          successors of the parties.

                                      26
<PAGE>
 
13.2 This Agreement (together with any documents referred to herein or executed
     contemporaneously by the parties in connection herewith) constitutes the
     whole agreement between the parties hereto and supersedes any previous
     agreements or arrangements between them relating to the subject matter
     hereof; it is expressly declared that no variations hereof shall be
     effective unless made in writing signed by duly authorised representatives
     of the parties.

13.3 All of the provisions of this Agreement shall remain in full force and
     effect notwithstanding Completion (except insofar as they set out
     obligations which have been fully performed at Completion).

13.4 If any provision or part of a provision of this Agreement shall be, or be
     found by any authority or court of competent jurisdiction to be, invalid or
     unenforceable, such invalidity or unenforceability shall not affect the
     other provisions or parts of such provisions of this Agreement, all of
     which shall remain in full force and effect.

13.5 If any liability of one but not both of the Vendors shall be or become
     illegal, invalid or unenforceable in any respect, such circumstance shall
     not affect or impair the liabilities of the other Vendor under this
     Agreement.

13.6 The Purchaser may release or compromise the liability of either of the
     Vendors hereunder or grant to either Vendor time or other indulgence
     without affecting the liability of the other Vendor hereunder.

13.7 No failure of any party to exercise, and no delay or forbearance in
     exercising, any right or remedy against any other party in respect of any
     provision of this Agreement shall operate as a waiver of such right or
     remedy.

13.8 Upon and after Completion the Vendors shall do and execute or procure to be
     done and executed all such further acts, deeds, documents and things as may
     be [reasonably] necessary to give effect to the terms of this Agreement and
     to place control of the Company in the hands of the Purchaser and pending
     the doing of such acts, deeds, documents and things the Vendors shall as
     from Completion hold the legal estate in the Sale Shares in trust for the
     Purchaser.

                                      27
<PAGE>
 
13.9 This Agreement may be executed in one or more counterparts, and by the
     parties on separate counterparts, but shall not be effective until each
     party has executed at least one counterpart and each such counterpart shall
     constitute an original of this Agreement but all the counterparts shall
     together constitute one and the same instrument.

14.  NOTICES
     -------

Any notice required to be given by any party hereto to any other shall be deemed
validly served by hand or courier or by first class registered delivery post to
its address given herein or such other address as may from time to time be
notified for this purpose and any notice served by hand or courier shall be
deemed to have been served on delivery, and if posted, at 10 am on the second
business day after the date of the registered delivery receipt. In proving
service it shall be sufficient to prove that the notice was properly addressed
and delivered or posted as a first class registered letter.

15.  GOVERNING LAW AND SUBMISSION TO JURISDICTION
     --------------------------------------------

This Agreement shall be governed by and construed in accordance with English law
and the parties hereto submit to the non-exclusive jurisdiction of the English
courts for the purpose of enforcing any claim arising hereunder.

                                      28
<PAGE>
 
DULY EXECUTED

SIGNED by               )
Geoffrey Cox            )       /s/ Geoffrey Cox
for and on behalf of    )
CRAY SYSTEMS LTD        )



SIGNED by               )
Robert McMicking        )       /s/ Robert McMicking
for and on behalf of    )
DIGITAL EQUIPMENT       )
COMPANY LTD             )



SIGNED by               )
David Brenner           )       /s/ David Brenner
for and on behalf of    )
CSG SYSTEMS             )
INTERNATIONAL, INC.     )

                                      29
<PAGE>
 

                                  SCHEDULE 1
                                  ----------
                            DETAILS OF THE COMPANY
                            ----------------------

<TABLE>
<CAPTION>
THE COMPANY
- - - -----------
<S>  <C>                             <C>
1.   Registered number:               2722892
     
2.   Address of registered office:    161 Fleet Road, Fleet, Hampshire  GU13 8PD
     
3.   Date and place of incorporation: June 15, 1992 - England.
     
4.   Authorised share capital:        500,000 A ordinary shares of
                                      (Pounds)1 each and 500,000 B ordinary
                                      shares of (Pounds)1 each.
     
5.   Issued share capital:            50,000 A ordinary shares of (Pounds)1
                                      each and 50,000 B ordinary shares of
                                      (Pounds)1 each.
     
6.   Directors:                       C. Musgrave, M. L. Shone, R. McMicking.
     
7.   Secretary:                       D.P.C. Tidsall.
     
8.   Accounting Reference Date:       April 30.
     
9.   Auditors:                        Arthur Andersen.

10.  VAT number:                      GB 578347592
</TABLE>

                                      30
<PAGE>
 
                                  SCHEDULE 2
                                  ----------
                                 CRAY INVOICES
                                 -------------

     See attached

                                      31
<PAGE>

                                   SCHEDULE 3
                                   ----------
                                   WARRANTIES
                                   ----------

Each and every Warranty contained in this Schedule 3 is given by Cray.  The
Warranties in paragraphs 1.2 and 3.2 of this Schedule are given severally by
Cray and DEC.

1.   CORPORATE
     ---------

1.1  The Company has been duly incorporated and is validly existing and the
     Company has not received notice that an order has been made or petition
     presented for the winding up or the administration of the Company nor has
     the Company passed a resolution for its winding up and so far as Cray is
     aware, no distress, execution or other process has been levied on any of
     the Company's assets. No administrative receiver or receiver or receiver
     and manager has been appointed by any person of its business or assets or
     any part thereof and, so far as Cray is aware, no power to make any such
     appointment has arisen.

1.2  The Vendors are the registered holders and beneficial owners of the Sale
     Shares set opposite their names in column 2 of Schedule 5, free and clear
     of any lien, charge, option, right of pre-emption or other encumbrance or
     third party right whatsoever. There is no outstanding call on any of the
     Sale Shares and all of the Sale Shares are fully paid.

1.3  The Sale Shares constitute all the issued shares in the capital of the
     Company.

1.4  All statutory books and records of the Company are up to date, and contain
     no material inaccuracies, and the Company has not received any application
     or request for rectification of any of its statutory registers.

1.5  The Memorandum and Articles of Association of the Company filed at the
     Companies Registry are accurate and complete in all respects.

2.   ACCOUNTS
     --------

2.1  The Accounts have been prepared in accordance with the requirements of all
     relevant statutes and with good and generally accepted accountancy
     principles and practice in the United Kingdom and are complete and
     accurate in all respects and show a true and fair

                                       32
<PAGE>
 
     view of the state of the affairs of the Company as at the Accounting Date
     and of its profits and losses for the financial period ending on the
     Accounting Date.

2.2  Since the Accounting Date, the Company has carried on its business in the
     ordinary course and has not entered into any transaction which is outside
     the ordinary course of the Company's business. Since the Accounting Date
     the Company has traded within, and to date its financial position is in
     line with, the budget of the Company for the fiscal year 1996/7 dated 7
     April 1996 and attached to the Disclosure Letter.

2.3  The provision of (Pounds)105,000 shown in the Accounts in respect of normal
     accounting practices regarding fixed price contracts of the Company under
     a contract with Telewest dated 12 April 1996 has been maintained in the
     accounts and financial records of the Company.  Notwithstanding any
     contrary provisions contained elsewhere in the Agreement, Cray's
     liability for breach of this Warranty shall not be limited by reference
     to any other provisions of this Agreement, including the provisions of
     Clause 8.

3.   TAXATION
     --------

3.1  The Company has made all returns and given or delivered all notices,
     accounts and computations which it is required by law to make for Tax
     purposes. There is no dispute or question with the Inland Revenue or HM
     Customs & Excise or other taxation authority and, so far as the Vendors are
     aware, no such dispute or question is likely. The Company has duly paid all
     Tax which it has become liable to and the Company has not been notified of
     any liability to pay any penalty, interest, fine or default surcharge in
     connection with any claim for Tax. The Company has deducted and accounted
     for all Tax required to be deducted under PAYE and all other payments made
     by the Company which are required to be made under deduction or withholding
     of Tax have been so made and the relevant sum accounted for to the relevant
     authority.

3.2  The Company has not surrendered any of the trading losses shown in the
     Accounts or any of the trading losses incurred since the Accounting Date
     (which are available to be carried forward under Section 393 Taxes Act) and
     there is no agreement or arrangement in existence for the surrender of any
     such losses.

                                       33
<PAGE>

4.   TRADING AND GENERAL COMMERCIAL MATTERS
     --------------------------------------

4.1  The bundle of documents attached to the Disclosure Letter contains copies
     of each material contract to which the Company is a party and which are
     still open for performance by either party thereto (the "Disclosed
     Contracts").

4.2  To the best of the Cray's knowledge and belief, the Company has not
     received any written notice to terminate any of the Disclosed Contracts.

4.3  The Cray Trade Receivables are represented by goods, facilities or services
     provided to the Company and are in accordance with the agreements between
     Cray and the Company as summarised in the Disclosure Letter. The Cray Trade
     Receivables have been properly incurred in the ordinary course of business.
     Any VAT payable on any of the Trade Receivables shall be recoverable by the
     Company as input tax.

4.4  So far as Cray is aware there are no guarantees or charges over the Company
     or its assets other than charges created by operation of law in the
     ordinary course of business.

5.   CONFIDENTIAL INFORMATION AND INTELLECTUAL PROPERTY
     --------------------------------------------------

5.1.1     In this paragraph 5.1, "Confidential Information" means all know-
          how, lists of customers or suppliers, trade secrets, technical
          processes or other confidential information belonging to the Company
          or to any third party.

5.1.2     So far as Cray is aware, the Company does not use any processes and
          is not engaged in any activities which involve the misuse of any
          Confidential Information belonging to any third party.

5.1.3     So far as Cray is aware, the Company is not in breach of any
          agreement or arrangement under which Confidential Information
          belonging to any third party is made available to the Company and is
          not aware of the existence of any circumstances under which its right
          to use such Confidential Information may be terminated.

                                       34
<PAGE>

5.2  The Company is the sole owner and, where registered, the sole registered
     proprietor, capable of transferring the same with full title guarantee, of
     all the Intellectual Property of a material nature (excluding Intellectual
     Property licensed to the Company by any third party) which is used in its
     business ("the Company's Intellectual Property"). Payment of all renewal
     fees for registration of the Company's Intellectual Property due on or
     before Completion is up to date.

5.3  All material agreements entered into by the Company for the licensing, or
     otherwise permitting the use or exploitation, of the Company's Intellectual
     Property are included in the bundle of documents referred to in the
     Disclosure Letter.

5.4  So far as Cray is aware, the Company is not engaged in any activities which
     infringe any Intellectual Property belonging to any third party and there
     are no proceedings or threatened proceedings against the Company or by the
     Company against any third party for infringement of Intellectual Property.

5.5  All material agreements under which the Intellectual Property belonging to
     any third party is licensed to the Company other than agreements for the
     day-to-day running of the Company's internal office equipment, development
     tools and administration services are set out in the Disclosure Letter so
     far as Cray is aware, and the Company is not in breach of any such
     agreement or arrangement and is not aware of the existence of any
     circumstances under which its right to use such Intellectual Property may
     be terminated.

6.     SOFTWARE DEVELOPMENT
       --------------------

With respect to all contracts, commitments, arrangements and understandings
which are material to the Company's business for the design, writing,
programming, development, supply or installation of computer software or the
like to which the Company is party or by which it is bound and which are still
open for performance:

6.1  particulars of all such contracts, commitments, arrangements and
     understandings are included in the bundle of documents referred to in the
     Disclosure Letter; and

6.2  as far as Cray is aware, the Company has not received any notice of breach
     or termination or had court action commenced in respect of any such
     contract, commitment, arrangement or understanding.

                                       35
<PAGE>
 
7.   SOFTWARE
     --------

7.1  In this paragraph 7, the expression "the Software" means all of the
     computer programs identified and briefly described in Schedule 5.

7.2  The Software includes all computer programs, software and software systems,
     whether in source code, object code or human readable form used or supplied
     in or in connection with the business of the Company or currently in
     development (whether owned by the Company, licensed to the Company by a
     third party or sub-licensed by the Company pursuant to a licence agreement
     from a third party) which are material to the development of products for
     sale or licensing to customers, but excluding software relating to day-to-
     day running of the Company's internal office equipment, development tools
     and administration services.

7.3  The Company has absolute title and right to and copyright in each item of
     the Software described in Part I of Schedule 5 including source code and
     object code, all relevant documents, media and confidential information
     free of all encumbrances and adverse claims and all material agreements
     under which the property rights of the Company in such Software have been
     assigned or licensed to any party are included in the bundle of documents
     referred to in the Disclosure Letter.

7.4  Copies of all agreements under which the software described in Part I of
     Schedule 5 is held in escrow are included in the bundle of documents
     referred to in the Disclosure Letter.

7.5  The Company is entitled to use and, where indicated, to grant sub-licences
     to third parties to use the Software described in Part II of Schedule 3
     pursuant to licences and/or consents granted to the Company by the owner or
     licensee of such Software, true and complete copies of such licences having
     been included in the bundle of documents referred to in the Disclosure
     Letter, and being in full force and effect. Subject to matters shown in the
     Disclosure Letter, all royalties and other payments have been paid when due
     and there has been no act or default by the Company or, to the actual
     knowledge of Cray where appropriate, its sub-licensees or any other person
     which may in any way result in such licences being terminated or the
     Company being unable to obtain any benefit under such licences.


                                      36
<PAGE>
 
8.   PROPERTY
     --------

Other than the existing arrangement with Cray, whereby the Company uses part of
the Cray business premises, the Company has no interest in any freehold or
leasehold property and no continuing or contingent liability in respect of any
freehold or leasehold property in which it formerly had any estate or interest
and the Company has not at any time guaranteed the performance by any person of
any obligation in respect of any freehold or leasehold property.

9.   LITIGATION
     ----------

The Company is not engaged whether as plaintiff or defendant or otherwise in any
civil, criminal or arbitration proceedings or any proceedings before any
tribunal and so far as Cray is aware, there are no proceedings threatened or
pending against the Company and so far as Cray is aware there are no facts which
are likely to give rise to any such litigation or proceedings.  There are no
unfulfilled or unsatisfied judgments or orders against the Company or any of its
assets.

10.  EMPLOYMENT AND PENSION MATTERS
     ------------------------------

10.1 Full details of the terms of employment or engagement of all directors,
     employees, and consultants of the Company have been disclosed in writing
     to the Purchaser.

10.2 So far as Cray is aware, there is no existing or threatened or pending
     industrial or trade dispute involving the Company and any of its
     employees.

10.3 Save as disclosed in the Disclosure Letter, there are no pension, share
     option, share incentive, life insurance, disability or similar schemes,
     arrangements or obligations for any employees or directors of the
     Company.

11.  INFORMATION PROVIDED
     --------------------

Cray has not knowingly withheld from the Purchaser any information which could
reasonably be expected to be material concerning the Company and its affairs.

                                      37
<PAGE>
 
                                   SCHEDULE 4
                                   ----------
                                  THE VENDORS
                                  -----------
<TABLE>
<CAPTION>
 
<S>                              <C>
 
(1)                              (2)
                                
NAME AND ADDRESS OF VENDOR       NUMBER OF SALE SHARES
Cray Systems Limited             50,000 B Ordinary Shares
5 Genesis Business Park
Albert Drive
Woking,
Surrey  GU21 5RW

Digital Equipment Co. Limited    50,000 A Ordinary Shares
P.O. Box 54
Twyford
Reading
Berkshire  RG10 9FE

</TABLE>

                                      38

<PAGE>
 
                                                                    Exhibit 2.17
DATED 28th June 1996
- - - --------------------


(1)  CRAY SYSTEMS LIMITED

(2)  BYTEL LIMITED



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

                         ADMINISTRATION AND DEVELOPMENT
                               SERVICES AGREEMENT

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



                                    OLSWANG
                                  90 Long Acre
                                London WC2E 9TT

                               Tel. 0171-208 8888
                               Fax: 0171-208 8800
                         email: [email protected]

                           Ref: ECM/C3223-85/Draft 4
<PAGE>
 
THIS AGREEMENT is dated 28th June 1996

BETWEEN

(1)  CRAY SYSTEMS LIMITED (registered no 1721900) whose registered office is at
     161 Fleet Road, Fleet, Hampshire GU13 8PD ("Cray")

(2)  BYTEL LIMITED (Registered no 2722892) whose registered office is at 161
     Fleet Road, Fleet, Hampshire GU13 8PD ("Bytel")

RECITALS

A.   During the period in which Cray was a shareholder of Bytel it provided on a
     commercial basis certain services to Bytel.

B.   Cray has agreed to make certain services available to Bytel on reduced
     terms and subject to the conditions set out below.

WHEREBY IT IS AGREED as follows:

1.   SERVICES TO BE PROVIDED

1.1  Subject to Clause 1.3 Cray shall provide to Bytel administrative services
     in relation to the operation of Bytel's payroll and provision of an
     accounting system as described in Schedule 2 ("Administration Services")
     from the date hereof for a period of 12 months unless terminated by either
     party pursuant to Clause 4.

1.2  The extent of the Administration Services to be provided by Cray pursuant
     to Clause 1.1 shall be agreed between the parties from time to time.

                                       1
<PAGE>
 
1.3  The obligation of Cray to provide the Administration Services shall
     terminate, in any event, upon Bytel ceasing to occupy the premises at 712
     Banbury Avenue, Slough.

1.4  Cray shall on request provide to Bytel (so far as it is able) the services
     of such of Cray's development contractors as are set out in Schedule 1
     ("Development Contractors") to the extent agreed between the parties from
     time to time from the date hereof until the delivery of the development of
     Vax Version 27.1 of the Bytel software product SMS to Telewest or 31st
     October 1996, whichever is the later. For the avoidance of doubt Cray shall
     be under no obligation to procure the provision of services by any such
     Development Contractors who cease to be Cray contractors. Cray shall not
     without the consent of Bytel (such consent not to be unreasonably withheld)
     give notice to terminate the contract of any such Development Contractors
     which shall end during a period in which the services of the relevant
     Development Contractor are required by Bytel pursuant to this Clause,
     provided that if Bytel shall no longer require the services of the relevant
     Development Contractor it shall give written notice to Cray of the date
     when such services are no longer required. The period between the giving of
     such notice and the date the services are no longer required shall be no
     less than the notice period required to be given by Cray to terminate the
     relevant Development Contractor's contract.

1.5  Cray shall, on request of Bytel, continue to make those employees listed in
     Schedule 2 ("Bytel Development Employees") who have not become employees of
     Bytel available to Bytel from the date hereof until the delivery of the
     development of Vax Version 27.1 of the Bytel software product SMS to
     Telewest plc or 31st October 1996 whichever is the earlier.  For the
     avoidance of doubt Cray shall be under no obligation to procure the
     provision of services by any such Bytel

                                       2
<PAGE>
 
     Development Employees who cease to be employed by Cray or any of its
     Associated Companies.  An Associated Company shall in relation to Cray mean
     any company which is Cray's holding company or subsidiary of it or of its
     holding company, as those terms are defined in Section 736 and 736A of the
     Companies Act 1985.

1.6  Upon any of the Bytel Development Employees becoming an employee of Bytel
     such persons shall cease to be Bytel Development Employees for the purposes
     of this Agreement.

1.7  Cray shall discharge its obligations under this Agreement in relation to
     the operation of Bytel's payroll in a timely manner.

1.8  Each of Cray and Bytel shall ensure that when their staff or
     representatives are present on the premises of the other party that they
     comply with such rules and regulations as are notified to them by the
     resident party.

2.   EMPLOYEES

2.1  Bytel has made or will make written offers of employment to certain of the
     Bytel Development Employees.

2.2  Cray hereby undertakes that it shall not prejudice or impede any approach
     made by Bytel to the Bytel Development Employees.

2.3  Cray hereby agrees and undertakes to waive its rights to oblige the Bytel
     Development Employees to complete their contractual notice period with
     Cray.

2.4  Cray agrees and undertakes to indemnify at all times from and against all
     actions, proceedings, costs, claims, damages, demands, expenses and
     liabilities:

                                       3
<PAGE>
 
     arising out of or in any way connected with the Bytel Development Employees
     during the period when they were Cray employees, including without
     prejudice to the generality of the foregoing;

     any breach by Cray of any obligation under or in connection with their
     contracts of employment; and

     any breach by Cray of any other obligation or any duty (whether statutory
     or otherwise) owed by Cray to any of the Bytel Development Employees or to
     any trade union(s) or employee representatives recognized in respect of the
     Bytel Development Employees.

2.5  Such sums which are payable by Cray in respect of any salaries, wages,
     accrued holiday pay entitlement and other emoluments including but not
     limited to PAYE, income tax, National Insurance contributions and any
     contributions to Retirement Benefit Schemes which relate to the employment
     of the Bytel Development Employees by Cray while they are employees of Cray
     shall be borne by Cray, without prejudice to Bytel's payment obligations
     under Clause 3.2.3.

2.6  Without prejudice to Clause 2.4, Cray agrees and undertakes to indemnify
     Bytel at all times (and for the avoidance of doubt whether before, on or
     after the Completion Date) against all actions, proceedings, costs
     reasonably incurred, claims, damages, demands, expenses reasonably incurred
     and liabilities arising out of or in any way connected with Cray's
     employment of the Bytel Development Employees except in respect of the
     performance by the Bytel Development Employees of services for the benefit
     of Bytel.

                                       4
<PAGE>
 
3.   PAYMENT

3.1  In consideration of the provision of the Administration Services, Bytel
     shall pay to Cray in advance on the first day of each calendar month a
     monthly fee as follows:

     the aggregate of:

     (a)  (Pounds)500 per month in respect of the provision of an accounting
          system plus VAT; and

     (b)  (Pounds)5 per person processed per month in respect of the payroll
          system plus VAT.

3.2  In consideration of agreeing to provide the Development Contractors and the
     services of the Bytel Development Employees, Bytel shall pay to Cray:

     3.2.1     on the date of this Agreement (in each case plus VAT):

               (a)  (Pounds)150,000 in respect of the procurement of the
                    services of the Development Contractors and Bytel
                    Development Employees;

               (b)  (Pounds)108,000 in respect of a recruitment fee for those
                    Bytel Development Employees who join Bytel;

               (c)  (Pounds)90,000 in releasing the Bytel Development Employees
                    from their contracts with Cray;

               (d)  (Pounds)270,000 in respect of loss of profit to Cray arising
                    out of the procurement of the services

                                       5
<PAGE>
 
                    of the Bytel Development Employees and the Development
                    Contractors to Bytel; and

               (e)  (Pounds)172,000 in respect of time and inconvenience to Cray
                    in relation to the arrangements contemplated by this
                    Agreement.

     3.2.2     in arrears on the first day of such calendar month, an amount by
               way of reimbursement to Cray of the costs to Cray of the
               Development Contractors plus VAT;

     3.2.3     in arrears on the first day of each calendar month, an amount
               equal to the salary benefits (plus National Insurance
               Contributions) and other emoluments of the Bytel Development
               Employees plus VAT.

3.3  The payments to be made by Bytel pursuant to Clause 3.2.2 and 3.2.3 shall
     be calculated on a pro-rata basis for the period of time during which
     services are provided to Bytel.

3.4  At the request of Bytel, Cray shall promptly provide written evidence to
     support to the reasonable satisfaction of Bytel, any fee charged to Bytel
     pursuant to Clause 3.2.2 and 3.2.3.

4.   TERMINATION

4.1  Cray may terminate this Agreement forthwith by notice in writing to Bytel
     if Bytel fails to make any payment under Clauses 3.1 and 3.2 within seven
     days from the date of receipt of an invoice for such payment, provided
     that, in the case of an invoice rendered in respect of payments due
     pursuant to Clause 3.2, Bytel has received from Cray (where requested)

                                       6
<PAGE>
 
     evidence to support to the reasonable satisfaction of Bytel the fee charged
     pursuant to that Clause.

4.2  Either party may terminate this Agreement (excluding the services provided
     pursuant to Clauses 1.4 and 1.5) by giving to the other one month's advance
     written notice of its intention to do so.

4.3  Either party may terminate this Agreement immediately by notice in writing
     to the other if:

     4.3.1     the other party is in material breach of this Agreement and such
               breach, if capable of remedy, has not been remedied within 30
               days following receipt of written notice of the breach from the
               party wishing to terminate.

4.4  Termination of this Agreement for whatever reason shall be without
     prejudice to any pre-existing rights of the parties.

5.   GENERAL

5.1  The parties to this Agreement shall keep the terms of this Agreement and
     any information derived from or contained in the payroll to be operated by
     Cray and accounts systems to be provided by Cray pursuant to Clause 1
     confidential.

5.2  Bytel shall indemnify Cray in full in respect of any third party claims
     arising out of the performance by Cray of its obligations under this
     Agreement to operate Bytel's payroll.  This indemnity shall not apply where
     Cray is in breach of its obligations in respect of the operation of Bytel's
     payroll.

                                       7
<PAGE>
 
6.   WAIVER

6.1  The failure of any party to assert, enforce or exercise, at any time or for
     any period of time, any term of or any right arising pursuant to this
     Agreement does not constitute, and shall not be construed as, a waiver of
     such term or right and shall in no way affect that party's right later to
     assert, enforce or exercise it.

7.   SEVERABILITY

7.1  If at any time any provision or part of a provision hereof is or becomes
     illegal, invalid or unenforceable in any respect, such illegality,
     invalidity or unenforceability shall not affect the other provisions or
     parts of such provisions of this Agreement which shall remain in full force
     and effect.

8.   ASSIGNMENT

8.1  Neither party may assign this Agreement or otherwise part with any right or
     obligation under it without the other party's prior written consent (which
     is not to be unreasonably withheld).

9.   INDEPENDENT CONTRACTORS

9.1  The relationship of the parties is that of independent contractors.  Except
     as set out in this Agreement, nothing shall:

     9.1.1     constitute the parties as partners, joint venturers or co-owners;

     9.1.2     constitute either party as the agent, employee, attorney-in-fact
               or representative of the other; or

                                       8
<PAGE>
 
     9.1.3  empower either party to act for, bind or otherwise create or assume
            any obligation on behalf of the other.

10.  VARIATION

10.1 No amendment or variation of this Agreement shall be effective unless in
     writing and signed by a duly authorised representative of each of the
     parties.

11.  GOVERNING LAW AND SUBMISSION TO JURISDICTION

11.1 This agreement shall be governed and construed in accordance with English
     law and the parties hereto submit to the exclusive jurisdiction of the
     courts of England for the purpose of enforcing any claims arising
     hereunder.

                                       9
<PAGE>
 
IN WITNESS the hands of the parties or their duly authorised representatives the
date first above written



SIGNED by Geoffrey Cox              )
duly authorised for and on behalf   )    /s/ Geoffrey Cox
of CRAY SYSTEMS LIMITED             )
in the presence of:                 )


Witness signature:

Witness Name:

Address:



Occupation:



SIGNED by Christopher M. Musgrave   )
duly authorised for and on behalf   )  /s/ Christopher M. Musgrave
of BYTEL LIMITED                    )
in the presence of:                 )


Witness signature:

Witness Name:

Address:



Occupation:

                                       10


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