SAVILLE SYSTEMS PLC
8-K, 1998-04-16
COMPUTER PROGRAMMING SERVICES
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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):

                                 April 3, 1998

                    ________________________________________


                              SAVILLE SYSTEMS PLC
             (Exact name of Registrant as specified in its charter)
<TABLE>
<CAPTION>
 
 
<S>                            <C>            <C>
   Republic of Ireland           0-27176       Not Applicable
   (State or other juris-      (Commission    (I.R.S. Employer
   diction of incorpora-       File Number)   Identification Number)
   tion or organization)
</TABLE>


                   IDA Business Park, Dangan, Galway, Ireland
          (Address of principal executive offices, including zip code)

                               011 353 9 152 6611
   (Registrant's telephone number including area code from the United States)

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


 
<PAGE>
 
Item 2.   Acquisition or Disposition of Assets
          ------------------------------------

     On April 3, 1998, Saville Systems PLC (the "Company") and its wholly-owned
subsidiary Saville Systems Aust. Pty Ltd ("Saville Australia"), acquired
substantially all of the assets of BHA Pty Ltd ("BHA") and its majority-owned
subsidiary BHA Computer Pty Ltd ("BHAC") for approximately $15.8 million in
cash, plus the assumption of approximately $3.3 million in net liabilities.  The
Company funded the acquisition, in part, through the sale of 283,698 of the
Company's Ordinary Shares to BHA, as more fully described in Item 9 below. The
assets consist of those assets used by BHA and BHAC in developing and marketing
customer care and billing software for the telecommunications industry,
including property, plant and equipment, intellectual property and the benefit
of current BHA or BHAC contracts.

     The purchase price was negotiated at arm's length between the Company, BHA
and BHAC; and the acquisition was made pursuant to a Business Acquisition
Agreement dated as of April 3, 1998 between the Company, Saville Australia, BHA,
BHAC and John E. Hendry and Prudence M. Hendry, the shareholders of BHA, as
guarantors to the obligations of BHA and BHAC.  The Purchase Price was funded in
part by the borrowing of approximately $15 million from the Company's working
capital line of credit with the Bank of Nova Scotia, which amount was repaid
with the proceeds from the share purchase described in Item 9 below.  Andrew
Campbell, an executive officer of the Company, is a shareholder of less than 1%
of the outstanding shares of BHAC of which he was an employee until December
1996.

     The Company has no present intention to use the plant, equipment or other
physical property acquired for purposes materially different from the purposes
for which such assets were used prior to the acquisition.  However, the Company
will review the use of the assets and may develop alternative plans or
proposals, including transfers of a material amount of assets or other
transactions or changes relating to the acquired assets.

     Item 7.  Financial Statements, Pro Forma Financial Information and Exhibits
              ------------------------------------------------------------------

     (a)  Financial Statements of Business Acquired: not applicable.

     (b)  Pro Forma Financial Information: not applicable.

     (c)  Exhibits

     2.1  Business Acquisition Agreement dated as of April 3, 1998 between
          Saville Systems PLC, Saville Systems Aust. Pty Ltd, BHA Pty Ltd, BHA
          Computer Pty Ltd, John Edward Hendry and Prudence Marianne Hendry.
          Pursuant to Item 601(b)(2) of regulation S-K, schedules to this
          Agreement have been omitted.  The Company hereby undertakes to furnish
          supplementally a copy of such schedules to the Commission upon
          request.

     10.1 Share Purchase Agreement dated as of April 3, 1998 between Saville
          Systems PLC and BHA Pty Ltd.
<PAGE>
 
     Item 9.   Sales of Equity Securities Pursuant to Regulation S
               ---------------------------------------------------

     On April 3, 1998, the Company sold 283,698 of its Ordinary Shares to BHA
for an aggregate consideration of $14,046,649, which proceeds were used to repay
outstanding amounts under the Company's line of credit with the Bank of Nova
Scotia.  No underwriters were involved in the foregoing sale of securities.
Such sales were made in reliance upon an exemption from the registration
provisions of the Securities Act of 1933 set forth in Section 4(2) thereof
relative to sales by an issuer not involving any public offering or Regulation S
promulgated thereunder, as the purchaser was not a US person as defined under
Regulation S.

                                   SIGNATURE

     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 thereunto duly authorized, on this 16th day of April 1998.

                                    SAVILLE SYSTEMS PLC


                                    By:  /s/ Christopher A. Hanson
                                         -------------------------
                                         Christopher A. Hanson
                                         Chief Financial Officer (Principal
                                         Finanacial and Accounting
                                         Officer)
<PAGE>
 
                              SAVILLE SYSTEMS PLC

                                 Exhibit Index
                                 -------------



  Exhibit No.    Description of Exhibit
  -----------    ----------------------

   2.1 ........ Business Acquisition Agreement dated as of April 3, 1998 between
                Saville Systems PLC, Saville Systems Aust. Pty Ltd, BHA Pty Ltd,
                BHA Computer Pty Ltd, John Edward Hendry and Prudence Marianne
                Hendry. Pursuant to Item 601(b)(2) of regulation S-K, schedules
                to this Agreement have been omitted. The Company hereby
                undertakes to furnish supplementally a copy of such schedules to
                the Commission upon request.

   10.1 ....... Share Purchase Agreement dated as of April 3, 1998 between
                Saville Systems PLC and BHA Pty Ltd.

<PAGE>
 
                                                                     Exhibit 2.1

                        ------------------------------
                        BUSINESS ACQUISITION AGREEMENT
                        ------------------------------


Between

The Vendors:

(1)    BHA PTY LTD ACN 009 937 606 and
(2)    BHA COMPUTER PTY LTD ACN 068 883 429

                                      and

The Purchasers:

(3)    SAVILLE SYSTEMS PLC and
(4)    SAVILLE SYSTEMS AUST. PTY LTD ACN 080 026 551

                                      and

The Vendors' Guarantors:

(5)    JOHN EDWARD HENDRY and

(6)    PRUDENCE MARIANNE HENDRY

                                  3 March 1998
<PAGE>
 
                               TABLE OF CONTENTS
<TABLE> 
<CAPTION> 

CLAUSE                                                             PAGE
<S>                                                                <C> 

1.    DEFINITIONS AND INTERPRETATION                                2

1.1   DEFINITIONS                                                   2
 
1.2   INTERPRETATION                                               13

2.    SALE AND PURCHASE OF ASSETS                                  14
 
2.1   IP ASSETS                                                    14
                                             
2.2   NON-IP ASSETS                                                15
                                             
2.3   QIT LICENCES                                                 15
                                             
2.4   BHAC LICENCE AGREEMENTS SURRENDER                            15

3.    PURCHASE PRICE AND PAYMENTS                                  15
 
3.1   IP ASSETS CONSIDERATION                                      15 
                                                                      
3.2   NON-IP ASSETS CONSIDERATION                                  15 
                                                                      
3.4   APPORTIONMENT                                                15 
                                                                      
3.5   ALLOCATION OF PURCHASE PRICE                                 17 

4.    COMPLETION                                                   17

4.1   COMPLETION DATE AND PLACE                                    17   
                                                                      
4.2   VENDOR'S OBLIGATIONS ON COMPLETION                           17 
                                                                      
4.3   PURCHASERS OBLIGATIONS ON COMPLETION                         19 
                                                                      
4.4   TITLE AND RISK                                               19 
                                                                      
4.5   SALE AND PURCHASE OF ASSETS INTERDEPENDENT                   20 
                                                                      
4.6   FURTHER ASSURANCE                                            20 
                                                                      
4.7   SUCCESSION                                                   20 
</TABLE> 
<PAGE>
 
<TABLE> 
<S>                                                               <C> 
5.    DEBTS AND LIABILITIES                                        20
 
5.1   ASSUMED LIABILITIES                                          20   
                                                                      
5.2   DEBTS AND LIABILITIES OWING BY THE VENDOR                    20 
                                                                      
5.3   DEBTS OWING TO THE VENDOR AND TO THE PURCHASER               21 
                                                                      
5.4   COLLECTION OF TRADE RECEIVABLES                              21 
                                                                      
5.5   PURCHASER TO PASS ON OTHER DEBTS RECEIVED                    21 
                                                                      
5.6   ACTIONS IN RESPECT OF COMPLETION DEBTS                       21 

6.    PREMISES LEASES                                              22
 
6.1   ASSIGNMENT OF PREMISES LEASES                                22   
                                                                      
6.2   DOCUMENTATION                                                22 
                                                                      
6.3   KANGAROO POINT PREMISES                                      22 
                                                                      
6.4   INDEMNITIES                                                  23 
                                                                      
6.5   OBLIGATIONS PENDING ASSIGNMENTS                              23 

7.    BUSINESS CONTRACTS                                           24
 
7.1   ASSIGNMENT OF BUSINESS CONTRACTS ON COMPLETION               24    
                                                                      
7.2   NOVATIONS OR ASSIGNMENTS AFTER COMPLETION                    24 
                                                                      
7.3   OBLIGATIONS PENDING OR IF NO NOVATION OR ASSIGNMENT          25 
                                                                      
7.4   INDEMNITIES                                                  25 
                                                                     
8.    EMPLOYEES                                                    26
                                                                     
8.1   PARTICULARS OF EMPLOYEES                                     26 
                                                                      
8.2   OFFER OF EMPLOYMENT                                          26 
                                                                      
8.3   ACCEPTANCE OF OFFERS OF EMPLOYMENT                           27 
                                                                      
8.4   TRANSFERRING EMPLOYEES                                       27 
</TABLE> 
<PAGE>
 
<TABLE> 

<S>                                                              <C> 
8.6   WRITTEN EVIDENCE OF PAYMENTS                                 27
                                                                      
8.7   INDEMNITY                                                    27
                                                                      
8.8   SUPERANNUATION                                               28
                                                                      
8.9   WORKERS' COMPENSATION                                        28
                                                                      
8.10  REDUNDANCY PAYMENTS                                          29 

9.    CLAIMS BY CUSTOMERS                                          29
 
9.1   PURCHASER'S AFTER-SALES SERVICE OBLIGATIONS                  29
 
9.2   VENDOR'S INDEMNITY                                           29
 
9.3   CONDUCT OF LITIGATION                                        29
 
9.4   PURCHASER IS RESPONSIBLE FOR POST-COMPLETION SERVICES        30
 
10.   ACCESS TO EXCLUDED BUSINESS RECORDS AFTER COMPLETION         30
 
11.   WARRANTIES                                                   30
 
11.1  VENDOR'S WARRANTIES                                          30
 
11.2  SURVIVAL OF WARRANTIES AND COVENANTS                         31
 
11.3  ASSISTANCE                                                   31
 
11.4  INDEMNITY                                                    31
 
11.5  LIMITATION OF INDEMNITIES                                    31
 
11.7  YEAR 2000 WORK                                               34
 
11.8  MUTUAL WARRANTIES                                            34
 
11.9  ACKNOWLEDGMENT                                               35
 
12.   INTELLECTUAL PROPERTY                                        35
 
12.1  TECHNICAL ASSISTANCE                                         35
</TABLE> 
<PAGE>
 
<TABLE> 
<S>                                                                <C>   
12.2  EMPLOYEES AND CONTRACTORS PERMITTED TO DISCLOSE              35
 
13.   RESTRAINT OF TRADE                                           35
 
13.1  RESTRAINT OF TRADE                                           35           
                                                                                
13.2  NO SHARE ENTITLEMENTS                                        37           
                                                                                
13.3  SEVERANCE                                                    37           
                                                                                
13.4  RECEIPT OF LEGAL ADVICE                                      37           
                                                                                
13.5  CHANGE OF VENDORS' NAMES                                     37           
                                                                                
14.   GUARANTEES AND INDEMNITIES                                   37           
                                                                                
14.2  GUARANTEE OF SAVILLE AUSTRALIA'S OBLIGATIONS AND INDEMNITY   38           
                                                                                
15.   GENERAL                                                      39           
                                                                                
15.1  FURTHER ASSURANCE                                            39           
                                                                                
15.2  GOVERNING LAW                                                39           
                                                                                
15.3  WAIVER                                                       40           
                                                                                
15.4  SET-OFF                                                      40           
                                                                                
15.5  NOTICES                                                      40           
                                                                                
15.6  PUBLIC ANNOUNCEMENTS AND CONFIDENTIALITY                     41           
                                                                                
15.7  COUNTERPARTS                                                 42           
                                                                                
15.8  MODIFICATION                                                 42           
                                                                                
15.9  STAMP DUTIES                                                 42           
                                                                                
15.10 LEGAL COSTS                                                  42           
                                                                                
15.11 MERGER                                                       42           
                                                                                
15.12 SURVIVAL OF CERTAIN PROVISIONS                               42           
                                                                                
15.13 ENTIRE AGREEMENT                                             43            
</TABLE> 
<PAGE>
 
<TABLE> 
<S>                                                                <C>  
SCHEDULES
 
SCHEDULE 1    BRAND NAMES                                          44           
                                                                                
SCHEDULE 2    COMPANY, BUSINESS AND TRADE NAMES                    45           
                                                                                
SCHEDULE 3    PROPERTIES                                           45           
                                                                                
SCHEDULE 4    INTELLECTUAL PROPERTY                                47           
                                                                                
SCHEDULE 5    MOTOR VEHICLES                                       48           
                                                                                
SCHEDULE 6    PLANT AND EQUIPMENT                                  49           
                                                                                
SCHEDULE 7    WARRANTIES                                           50           
                                                                                
SCHEDULE 8    LISTED BUSINESS CONTRACTS                            74           
                                                                                
SCHEDULE 9    ACCOUNTS                                             76           
                                                                                
SCHEDULE 10   GUARANTEE                                            77           
                                                                                
SCHEDULE 11   CUSTOMERS                                            79           
                                                                                
SCHEDULE 12   EMPLOYEES                                            81           
                                                                                
SCHEDULE 13   COMMUNICATIONS SERVICES                              82           
                                                                                
SCHEDULE 14   WARRANTED COMPLETION DEBTS                           83           
                                                                                
SCHEDULE 15   ASSUMED LIABILITIES                                  84           
                                                                                
SCHEDULE 16   NON-YEAR 2000 COMPLIANT ASSETS                       85           
                                                                                
SCHEDULE 17   PERMITS                                              86           
                                                                                
SCHEDULE 18   KANGAROO POINT PREMISES LEASE                        87           
                                                                                
SCHEDULE 19   TECHNICAL ASSISTANCE AGREEMENT                       88           
                                                                                
SCHEDULE 20   QIT LICENCE                                          89           
                                                                                
SCHEDULE 21   UNCONDITIONAL FINANCIAL UNDERTAKING                  90           
                                                                                
SCHEDULE 22   DISCLOSURE SCHEDULE                                  92  
</TABLE>
<PAGE>
 
                         BUSINESS ACQUISITION AGREEMENT

This DEED is made at BRISBANE, AUSTRALIA on the        day of APRIL 1998

BETWEEN       (1)  BHA PTY LTD ACN 009 937 606 ("BHA"), and

              (2)  BHA COMPUTER PTY LTD ACN 068 883 429 ("BHAC"), both
                   incorporated in Queensland, Australia, having their
                   registered offices and principal places of business at
                   Leckhampton, 59-69 Shafston Avenue, Kangaroo Point, Brisbane
                   4169 (jointly and severally referred to as "VENDOR" or
                   "VENDORS")

AND           (3)  SAVILLE SYSTEMS PLC incorporated in Ireland ("SAVILLE
                   IRELAND") and

              (4)  SAVILLE SYSTEMS AUST. PTY LTD ACN 080 026 551 incorporated in
                   Queensland, Australia ("SAVILLE AUSTRALIA")

                   both C/- Clayton Utz, 215 Adelaide Street, Brisbane,
                   Queensland, Australia (jointly and severally referred to as
                   "PURCHASER" or "PURCHASERS")

AND           (5)  JOHN EDWARD HENDRY and PRUDENCE MARIANNE HENDRY of 37
                   Carwoola Street, Bardon Brisbane 4065 (jointly and severally
                   referred to as "VENDORS' GUARANTORS")

RECITALS


A.            BHA owns the BHA Assets and conducts the BHA Business;

B.            BHAC owns the BHAC Assets and since 1995 has conducted and
              presently conducts the BHAC Business under licence using knowhow,
              BHA Intellectual Property, concepts, business connections and
              reputation developed and owned by BHA;

C.            BHA provides business and financial support and makes premises
              available to BHAC to enable BHAC to conduct the BHAC Business;

D.            By Letter of Intent dated 6 February 1998 ("LOI") the parties set
              forth the principles of a proposed acquisition and sale of the BHA
              Business and the BHAC Business;
<PAGE>
 
E.            The Vendors have agreed to sell and Saville Ireland has agreed to
              purchase the IP Assets and Saville Australia has agreed to
              purchase the Non-IP Assets;

F.            The Vendors' Guarantors have agreed to guarantee the obligations
              of the Vendors;

G.            Saville Ireland has agreed to guarantee the obligations of Saville
              Australia

THIS DEED WITNESSES

 1.           DEFINITIONS AND INTERPRETATION

 1.1          DEFINITIONS

              In this Deed unless the context indicates a contrary intention:

              "AGREEMENT" and "THIS AGREEMENT" means this Deed;

              "ACCOUNTS" means the last accounts of BHA and of BHAC in respect
              of the Business as set out in Schedule 9;

              "ASSETS" means and includes individually and collectively the BHA
              Assets and the BHAC Assets, but excludes the Excluded Assets;

              "ASSUMED LIABILITIES" means the liabilities listed in Schedule 15
              hereto;

              "BHA ASSETS" means and includes individually and collectively:

              (a)   the BHA Goodwill;

              (b)   the BHA Intellectual Property;

              (c)   the BHA Plant and Equipment;

              (d)   the BHA Inventory;

              (e)   the BHA Motor Vehicles;

              (f)   the BHA Company Names;

              (g)   the BHA Business Names;

              (h)   the BHA Domain Names;
<PAGE>
 
              (i)   the BHA Brand Names;

              (j)   the BHA Email Addresses;

              (k)   the BHA Telephone Services;

              (l)   the BHA Business Records (other than the Excluded
                    Business Records);

              (m)   all cash including cash on hand and cash equivalent and
                    funds held with any bank or financial institution and
                    security held or entitled to be held by BHA at
                    Completion;

              (n)   the rights and benefits of BHA under those of the
                    Business Contracts described in clauses 71 and 72;

              (o)   the rights and benefits of BHA under the Premises
                    Leases;

              (p)   the BHA Permits;

              (q)   the BHA Business Claims;

              (r)   the BHA Systems;

              (s)   the BHA Prepayments Benefits; and

              (t)   the Other BHA Assets,

              but excludes the Excluded Assets;

              "BHA BRAND NAMES" means the brand names used in respect of the BHA
              Business and identified in Schedule 1;

              "BHA BUSINESS" means the business conducted by BHA in respect of
              software products, including the exploitation of goodwill, the
              licencing of intellectual property to BHAC and its customers and
              the provision of business support and premises to BHAC, either
              alone or jointly with any of its Related Bodies Corporate;

              "BHA BUSINESS CLAIMS" means all claims, refunds, security
              interests, causes of action, choses in action, rights to enforce
              confidentiality, trade secrets and non-disclosure, rights to
              enforce restrictive covenants or restraints of trade, rights of
              recovery, rights of set off, rights of recoupment,
<PAGE>
 
              rights under warranties and other similar assets relating to the
              BHA Business;

              "BHA BUSINESS NAMES" means the business names and trade names used
              in respect of the BHA Business and identified in Schedule 2;

              "BHA BUSINESS RECORDS" means all current operational records and
              documents relating to the BHA Assets and the BHA Business
              including but without limiting the generality thereof:

              (a)   all marketing and customer files and customer lists and
                    charging fee lists;

              (b)   service promotional descriptive sales trade and application
                    literature and other advertising material and catalogues;

              (c)   supplier lists;

              (d)   all records of trade debtors;

              (e)   wage and other employment benefit and payroll and personnel
                    records of the Transferring Employees;

              (f)   all computer software (including the media on which the same
                    is stored) and computer records;

              (g)   all product design and development records, production
                    outlines, flowcharts;

              (h)   all information and data stored by any means on computer
                    systems or otherwise;

              (i)   all records of the Business Contracts and the Premises
                    Leases;

              (j)   all agreements, documents and records relating to the
                    Assumed Liabilities; and

              (k)   stationery;

              "BHA COMPANY NAMES" means the company names used in respect of the
              BHA Business and identified in Schedule 2;

              "BHA DOMAIN NAMES" means the Internet addresses of Web Sites used
              in respect of the BHA Business or BHA and including but not
              limited to those
<PAGE>
 
              identified in Schedule 13;

              "BHA EMAIL ADDRESS" means an address used by the Business to send
              or receive information via an electronic network, including but
              not limited to an electronic address used on the Internet and
              including but not limited to an address specified in Schedule 13;

              "BHA GOODWILL" means the goodwill of BHA in and attaching to the
              BHA Business, including the benefit of the custom of the persons
              named in Schedule 11 and the benefit of the custom of the persons
              who became customers of the BHA Business after the date of the
              LOI;

              "BHA INTELLECTUAL PROPERTY" means and includes individually and
              collectively all trade mark, service mark, design, patent,
              copyright, algorithms, software programs, specifications,
              semiconductor and circuit layout rights, in-process research and
              development sketches, plans, blueprints, inventions, discoveries
              (whether patentable or not) trade secrets, confidential
              information, proprietary data, knowhow, tools, processes,
              methodologies, auditing control standards, manuals, or other
              proprietary rights or any rights to registration of such rights
              whether created before or after the date of this Agreement and
              whether Australian or foreign, and all customer and supplier
              listings and other industrial and intellectual property, apart
              from the BHA Business Names, the BHA Company Names and the BHA
              Brand Names, subsisting in, used in or relating to the BHA
              Business including without limitation the items particularised in
              Schedule 4;

              "BHA INVENTORY" means:

              (a)   raw materials of all kinds, including all consumables used
                    in or relating to the process of producing the goods,
                    products and services of the BHA Business or used in
                    purposes ancillary to that process and whether or not on the
                    Leased P roperties;

              (b)   finished goods and products (stock-in-trade) used in or
                    relating to the BHA Business;

              "BHA MOTOR VEHICLES" means the motor vehicles owned and used by
              BHA exclusively in relation to the BHA Business and which are
              described in Schedule 5;

              "BHA PERMITS" means those permits, registrations, licences and
              regulatory approvals required for the operation of the BHA
              Business;

              "BHA PLANT AND EQUIPMENT" means those items of plant and
              equipment, machinery, tools, gauges and other measuring devices,
              dyes, jigs, benches,
<PAGE>
 
              office furniture, office machines, office equipment, appliances,
              fittings and spare parts and maintenance materials in relation to
              any of the foregoing owned by BHA and used in or relating to the
              BHA Business being the items which are more particularly described
              in Schedule 6;

              "BHA PREPAYMENT BENEFITS" means all payments and all deposits and
              other prepayments paid or made by BHA prior to Completion:

              (a)   for items of the type described in the definition of Plant
                    and Equipment being bought-in items on hand at Completion or
                    to be supplied to the BHA Business after Completion but in
                    either case not being included in the BHA Assets, or brought
                    to account by BHA in the value of any of the BHA Assets;

              (b)   for other goods and services to be sold or supplied to the
                    BHA Business after Completion which are not included in the
                    BHA Assets or brought to account by BHA in the value of any
                    of the BHA Assets; and

              (c)   in respect of other benefits to be first received by the BHA
                    Business after Completion which are not included in the BHA
                    Assets or brought to account by BHA in the value of any of
                    the BHA Assets;

              "BHA SYSTEMS" means all billing systems including all accounting,
              invoicing, debt control, credit control, debt collection, debt
              recovery, debt adjustment and all related processes and
              documentation and further shall include all data processing
              information, storage data and retrieval systems, computer records,
              software, tapes, disks, archives, library and all ancillary data
              systems, documentation and data storage equipment all as used in
              respect of the BHA Business;

              "BHA TELEPHONE SERVICES" means all telephone, mobile and facsimile
              services used by BHA in connection with the BHA Business including
              in particular (but without limiting the generality of the
              foregoing) the telephone services using those numbers specified in
              Schedule 13;

              "BHA WEB SITES" means the series of files relating to the BHA
              Business or BHA available for access on the Internet;

              "BHAC ASSETS" means and includes individually and collectively:

              (a)   the BHAC Goodwill;
<PAGE>
 
              (b)   the BHAC Intellectual Property;

              (c)   the BHAC Plant and Equipment;

              (d)   the BHAC Inventory;

              (e)   the BHAC Motor Vehicles;

              (f)   the BHAC Company Names;

              (g)   the BHAC Business Names;

              (h)   the BHAC Domain Names;

              (i)   the BHAC Brand Names;

              (j)   the BHAC Email Addresses;

              (k)   the BHAC Telephone Services;

              (l)   the BHAC Business Records (other than the Excluded Business
                    Records);

              (m)   all cash including cash on hand and cash equivalent and
                    funds held with any bank or financial institution and
                    security held or entitled to be held by BHAC at Completion;

              (n)   the rights and benefits of BHAC under those of the Business
                    Contracts described in clauses 71 and 72;

              (o)   the rights and benefits of BHAC under the Premises Leases;

              (p)   the BHAC Permits;

              (q)   the BHAC Business Claims;

              (r)   the BHAC Systems;

              (s)   the BHAC Prepayments Benefits; and

              (t)   the Other BHAC Assets,

              but excludes the Excluded Assets;
<PAGE>
 
              "BHAC BRAND NAMES" means the brand names used in respect of the
              BHAC Business and identified in Schedule 1;

              "BHAC BUSINESS" means the business of designing, developing,
              marketing, supplying, integrating and maintaining software
              products and services, carried on by BHAC either alone or jointly
              with any of its Related Bodies Corporate;

              "BHAC BUSINESS CLAIMS" means all claims, refunds, security
              interests, causes of action, choses in action, rights to enforce
              confidentiality, trade secrets and non-disclosure, rights to
              enforce restrictive covenants or restraints of trade, rights of
              recovery, rights of set off, rights of recoupment, rights under
              warranties and other similar assets relating to the BHAC Business;

              "BHAC BUSINESS NAMES" means the business names and trade names
              used in respect of the BHAC Business and identified in Schedule 2;

              "BHAC BUSINESS RECORDS" means all current operational records and
              documents relating to the BHAC Assets and the BHAC Business
              including but without limiting the generality thereof:

              (a)   all marketing and customer files and customer lists and
                    charging fee lists;

              (b)   service promotional descriptive sales trade and application
                    literature and other advertising material and catalogues;

              (c)   supplier lists;

              (d)   all records of trade debtors;

              (e)   wage and other employment benefit and payroll and personnel
                    records of the Transferring Employees;

              (f)   all computer software (including the media on which the same
                    is stored) and computer records;

              (g)   all product design and development records, production
                    outlines, flowcharts;

              (h)   all information and data stored by any means on computer
                    systems or otherwise;
<PAGE>
 
              (i)   all records of the Business Contracts and the Premises 
                    Leases;

              (j)   all agreements, documents and records relating to the
                    Assumed Liabilities; and

              (k)   stationery;

              "BHAC COMPANY NAMES" means the company names used in respect of
              the BHAC Business and identified in Schedule 2;

              "BHAC DOMAIN NAMES" means the Internet addresses of Web Sites used
              in respect of the BHAC Business or BHAC and including but not
              limited to those identified in Schedule 13;

              "BHAC EMAIL ADDRESS" means an address used by the Business to send
              or receive information via an electronic network, including but
              not limited to an electronic address used on the Internet and
              including but not limited to an address specified in Schedule 13;

              "BHAC GOODWILL" means the goodwill of BHAC in and attaching to the
              BHAC Business, including the benefit of the custom of the persons
              named in Schedule 11 and the benefit of the custom of the persons
              who became customers of the BHAC Business after the date of the
              LOI;

              "BHAC INTELLECTUAL PROPERTY" means and includes individually and
              collectively all trade mark, service mark, design, patent,
              copyright, algorithms, software programs, specifications,
              semiconductor and circuit layout rights, in-process research and
              development sketches, plans, blueprints, inventions, discoveries
              (whether patentable or not) trade secrets, confidential
              information, proprietary data, knowhow, tools, processes,
              methodologies, auditing control standards, manuals, or other
              proprietary rights or any rights to registration of such rights
              whether created before or after the date of this Agreement and
              whether Australian or foreign, and all customer and supplier
              listings and other industrial and intellectual property, apart
              from the BHAC Business Names, the BHAC Company Names and the BHAC
              Brand Names, subsisting in, used in or relating to the BHAC
              Business including without limitation the items particularised in
              Schedule 4;

              "BHAC INVENTORY" means:

              (a)   raw materials of all kinds, including all consumables used
                    in or relating to the process of producing the goods,
                    products and services of the BHAC Business or used in
                    purposes ancillary to that process and whether or not on the
                    Leased P roperties;                                         
<PAGE>
 
              (b)   finished goods and products (stock-in-trade) used in or
                    relating to the BHAC Business;

              "BHAC LICENCE AGREEMENTS" means the Licence Agreement dated 4
              August 1995 and the Licence Agreement dated the second day of
              April 1998 between BHA as the Licensor and BHAC as the Licensee,
              copies of which have been delivered by the Vendors to the
              Purchaser prior to Completion;

              "BHAC MOTOR VEHICLES" means the motor vehicles owned and used by
              BHAC exclusively in relation to the BHAC Business and which are
              described in Schedule 5;

              "BHAC PERMITS" means those permits, registrations, licences and
              regulatory approvals required for the operation of the BHAC
              Business;

              "BHAC PLANT AND EQUIPMENT" means those items of plant and
              equipment, machinery, tools, gauges and other measuring devices,
              dyes, jigs, benches, office furniture, office machines, office
              equipment, appliances, fittings and spare parts and maintenance
              materials in relation to any of the foregoing owned by BHAC and
              used in or relating to the BHAC Business being the items which are
              more particularly described in Schedule 6;

              "BHAC PREPAYMENT BENEFITS" means all payments and all deposits and
              other prepayments paid or made by BHAC prior to Completion:

              (a)   for items of the type described in the definition of Plant
                    and Equipment being bought-in items on hand at Completion or
                    to be supplied to the BHAC Business after Completion but in
                    either case not being included in the BHAC Assets, or
                    brought to account by BHAC in the value of any of the BHAC
                    Assets;

              (b)   for other goods and services to be sold or supplied to the
                    BHAC Business after Completion which are not included in the
                    BHAC Assets or brought to account by BHAC in the value of
                    any of the BHAC Assets; and

              (c)   in respect of other benefits to be first received by the
                    BHAC Business after Completion which are not included in the
                    BHAC Assets or brought to account by BHAC in the value of
                    any of the BHAC Assets;

              "BHAC SYSTEMS" means all billing systems including all accounting,
              invoicing, debt control, credit control, debt collection, debt
              recovery, debt
<PAGE>
 
              adjustment and all related processes and documentation and further
              shall include all data processing information, storage data and
              retrieval systems, computer records, software, tapes, disks,
              archives, library and all ancillary data systems, documentation
              and data storage equipment all as used in respect of the BHAC
              Business;

              "BHAC TELEPHONE SERVICES" means all telephone, mobile and
              facsimile services used by BHAC in connection with the BHAC
              Business including in particular (but without limiting the
              generality of the foregoing) the telephone services using those
              numbers specified in Schedule 13;

              "BHAC WEB SITES" means the series of files relating to the BHA
              Business or BHA available for access on the Internet;

              "BRAND NAMES" means the BHA Brand Names and the BHAC Brand Names;

              "BUSINESS" means the BHA Business and the BHAC Business;

              "BUSINESS CONTRACTS" means all agreements and arrangements
              exclusively relating to the Business to which a Vendor is a party
              and which are, in whole or in part, executory as at Completion,
              including without limiting the generality of the foregoing:

              (a)   customer and supplier orders, tenders, quotations and
                    similar dealings and other orders and agreements for the
                    supply of goods or services to or for the supply of services
                    by the Business;

              (b)   agreements granting rights to manufacture or distribute any
                    products or supply any services or to act as representative
                    or distributor or agent of the other party or to use know-
                    how, technology, confidential information, data, patents or
                    other industrial or intellectual property or intangible
                    assets; and

              (c)   loan, lease, licensing and hiring agreements under which a
                    Vendor has possession of certain assets which it does not
                    own and which are used in the Business,

              but excluding:

              (d)   the Premises Leases; and

              (e)   any agreements to the extent they relate to the Excluded
                    Assets;
<PAGE>
 
              "BUSINESS DAY" means a day on which all banks are open for
              business generally in Brisbane, Australia;

              "BUSINESS NAMES" means the BHA Business Names and BHAC Business
              Names;

              "BUSINESS RECORDS" means the BHA Business Records and the BHAC
              Business Records;

              "BUSINESS CLAIMS" means BHA Business Claims and the BHAC Business
              Claims;

              "CLAIM" means any claim, notice, demand, action, proceeding,
              litigation, investigation or judgment whether based in contract,
              tort, statute or otherwise;

              "COMPANY NAMES" means BHA Company Names and BHAC Company Names;
 
              "COMPLETION" means completion of this Agreement and the sale and
              purchase of the Assets in accordance with the terms of this
              Agreement;

              "COMPLETION DATE" means the date on which Completion occurs;

              "COMPLETION DEBTS" means:

              (a)   any notes receivable as between the Vendors or any Related
                    Body Corporate;

              (b)   any notes receivable relating to Employees of a Vendor; and

              (c)   the Trade Receivables,

              as at the Specified Time as specifically set forth in Schedule 14;

              "CUSTOMER CLAIMS" means any claims, demands, actions, suits or
              proceedings made or commenced by customers of the Business
              pertaining to defects in or arising directly or indirectly from or
              relating to goods, products or services provided sold or supplied
              by the Vendors prior to the Specified Time other than bona fide
              warranty obligations pursuant to the specific terms of the
              applicable Business Contract;

              "DISCLOSURE SCHEDULE" means the disclosure schedule attached
              hereto as Schedule 22;
<PAGE>
 
              "DOMAIN NAMES" means the BHA Domain Names and the BHAC Domain
              Names;

              "EMAIL ADDRESS" means the BHA Email Address and the BHAC Email
              Address;

              "EMPLOYEES" means those persons employed by BHAC, or by a Related
              Body Corporate of BHAC, exclusively in the Business as at
              Completion;

              "ENCUMBRANCE" includes any mortgage, charge, pledge, lien,
              security interest and any other encumbrance whatsoever;

              "EXCLUDED ASSETS" means:

              (a)   freehold property located at 59-69 Shafston Avenue, Kangaroo
                    Point, Brisbane;

              (b)   the antique furniture and the two large conference tables in
                    the boardroom at 59-69 Shafston Avenue, Kangaroo Point;

              (c)   shares in BHAC, Queensland Information Technology Pty Ltd
                    ACN 010 445 922 and in Information Technology International
                    (France); and

              (d)   prepaid insurance premiums and insurance expenses;

              "EXCLUDED BUSINESS RECORDS" means those of the Business Records as
              the Vendor is required by law to retain and debtor records (other
              than trade debtors), including all documents relating to the
              negotiation of the transaction, corporate records of the Vendors
              and documents relating to the Malaysia and Singapore branches;

              "FREEHOLD PROPERTIES" means the freehold properties at which the
              Business is conducted as specified in Part A of Schedule 3,
              together with all improvements erected on those properties;

              "GOODWILL" means the BHA Goodwill and the BHAC Goodwill;

              "INTELLECTUAL PROPERTY" means the BHA Intellectual Property and
              BHAC Intellectual Property;

              "INVENTORY" means the BHA Inventory and the BHAC Inventory;

              "IP ASSETS" means all of the Intellectual Property;
<PAGE>
 
              "IP ASSETS CONSIDERATION" means the Consideration to be provided
              for the IP Assets calculated in accordance with clause 31;

              "LEASED PROPERTIES" means the leased properties at which the
              Business is conducted as specified in Part B of Schedule 3;

              "MOST RECENT BALANCE SHEET" means the balance sheets included in
              the Accounts;

              "MOTOR VEHICLES" means BHA Motor Vehicles and BHAC Motor Vehicles;

              "NON-IP ASSETS" means all of the Assets except the Intellectual
              Property;

              "NON-IP ASSETS CONSIDERATION" means the Consideration to be paid
              or provided for the Non-IP Assets calculated in accordance with
              clause 32;

              "OTHER ASSETS" means the Other BHA Assets and the Other BHAC
              Assets;

              "OTHER BHA ASSETS" means all assets, properties and rights,
              whether real, personal, tangible or intangible of every kind,
              nature and description which BHA owns either alone or jointly,
              other than those listed in the definition of BHA Assets, which are
              used in or relate to the Business;

              "OTHER BHAC ASSETS" means all assets, properties and rights,
              whether real, personal, tangible or intangible of every kind,
              nature and description which BHAC owns either alone or jointly,
              other than those listed in the definition of BHAC Assets, which
              are used in or relate to the Business;

              "PERMITS" means the BHA Permits and the BHAC Permits;

              "PLANT AND EQUIPMENT" means BHA Plant and Equipment and BHAC Plant
              and Equipment;

              "PREMISES" means the Freehold Properties and the Leased
              Properties;

              "PREMISES LEASES" means the leases specified in Part B of Schedule
              3 relating to the Leased Properties;

              "PREPAYMENT BENEFITS" means BHA Prepayment Benefits and BHAC
              Prepayment Benefits;

              "PURCHASE PRICE" means the total of the IP Assets Consideration
              and the Non-IP Assets Consideration;
<PAGE>
 
              "QIT LICENCE" means the software licence referred to in clause 23
              and Schedule 20;

              "RELATED BODY CORPORATE" has the meaning given in section 9 of the
              Corporations Law;

              "SPECIFIED TIME" means midnight at the end of the Completion Date;

              "STATE" means the State of Queensland, Australia;

              "SYSTEMS" means BHA Systems and BHAC Systems;

              "TELEPHONE SERVICES" means BHA Telephone Services and BHAC
              Telephone Services;

              "TRADE RECEIVABLES" means all the debts and other moneys which at
              or after the Specified Time are or become owing to BHAC in
              relation to goods and products sold or servic es provided by BHAC
              in respect of the Business up to that time as specifically set
              forth in Schedule 14;

              "TRANSFERRING EMPLOYEES" means such of the Employees who accept
              the Purchaser's offer of employment made pursuant to clause 8;

              "WEB SITES" means the BHA Web Sites and the BHAC Web Sites;

              "WARRANTIES" means each of the covenants, undertakings,
              representations and warranties made in Schedule 7;

              "WORK IN PROGRESS" means work in progress used in or relating to
              the Business; and

              "$" means United States dollars.

 1.2          INTERPRETATION

              In this Agreement unless the context indicates a contrary
              intention:

              (a)   words importing the singular include the plural and vice
                    versa, and words denoting a given gender include all other
                    genders;

              (b)   the expression "PERSON" includes an individual, the estate
                    of an individual, a body politic, a corporation and a
                    statutory or other authority or association (incorporated or
                    unincorporated);
<PAGE>
 
              (c)   headings and underlinings are for convenience only and do
                    not affect interpretation;

              (d)   references to parties, clauses, sub-clauses, schedules,
                    exhibits or annexures are references to parties, clauses,
                    sub-clauses, schedules, exhibits and annexures to or of this
                    Agreement and a reference to this Agreement includes any
                    schedule, exhibit and annexure;

              (e)   references to this Agreement, or any other deed, agreement,
                    instrument or document shall be deemed to include references
                    to this Agreement, or such other deed, agreement, instrument
                    or document as amended, novated, supplemented, or replaced
                    from time to time;

              (f)   a reference to an agreement includes a representation,
                    undertaking, deed, agreement or legally enforceable order or
                    arrangement or understanding whether or not in writing;

              (g)   a reference to a document includes any written agreement and
                    any certificate or note or other document of any kind;

              (h)   references to any person or to any party to this Agreement
                    include that person's or party's executors, administrators,
                    successors and permitted assigns;

              (i)   where any word or phrase is given a defined meaning any
                    other part of speech or grammatical form in respect of such
                    word or phrase has corresponding meaning;

              (j)   where the day on or by which any sum is payable hereunder or
                    any act, matter or thing is to be done is a day other than a
                    Business Day, such sum shall be paid and such act, matter or
                    thing shall be done on the immediately preceding Business
                    Day;

              (k)   where 2 or more parties to this Agreement make a joint
                    covenant, undertaking, representation or warranty, the same
                    shall be construed to refer to and bind each of such parties
                    jointly and each of them severally;

              (l)   references to payments to any party to this Agreement shall
                    be construed to include payments to another person upon the
                    direction of such party;
<PAGE>
 
              (m)   all payments to be made pursuant to this Agreement shall be
                    made by unendorsed bank cheque or other immediately
                    available funds;

              (n)   reference to any legislation or to any section or provision
                    of any legislation include any statutory modification or re-
                    enactment or any statutory provision substituted therefor
                    and all ordinances, by-laws, regulations and other statutory
                    documents issued thereunder; and

              (o)   the expression the "Vendors' Guarantor" shall be construed
                    to refer to, and the obligations of the "Vendors' Guarantor"
                    hereunder shall bind, each of them severally and every two
                    or more of them jointly and the expression "Vendors'
                    Guarantor" shall be deemed, unless the context indicates a
                    contrary intention, to include any person who has guaranteed
                    or may in the future guarantee to the Purchasers the due
                    performance of the Vendor's obligations under this
                    Agreement.

 2.           SALE AND PURCHASE OF ASSETS

 2.1          IP ASSETS

              Each of the Vendors hereby sells and assigns to Saville Ireland
              and Saville Ireland hereby purchases and accepts an assignment
              from each of the Vendors of all of the right, title and interest
              in and to the IP Assets held by each of the Vendors for the IP
              Assets Consideration, free of Encumbrances.

 2.2          NON-IP ASSETS

              Each of the Vendors hereby sells and assigns to Saville Australia
              and Saville Australia hereby purchases and accepts an assignment
              from each of the Vendors of all of the right, title and interest
              in and to the Non-IP Assets held by each of the Vendors for the
              Non-IP Assets Consideration, free of Encumbrances.

 2.3          QIT LICENCES

              On Completion the Vendors shall cause Queensland Information
              Technology Pty Ltd ACN 010 445 922 to grant to Saville Australia
              the software licence in respect of the product known as DbQ on the
              terms set forth in the form of software licence contained in
              Schedule 20 hereto.

 2.4          BHAC LICENCE AGREEMENTS SURRENDER
<PAGE>
 
              The Vendors shall terminate or surrender with effect on or before
              Completion the BHAC Licence Agreements.

 3.           PURCHASE PRICE AND PAYMENTS

 3.1          IP ASSETS CONSIDERATION

              The full consideration for the IP Assets shall be four million,
              eight hundred and forty six thousand, six hundred and forty-nine
              dollars ($4,846,649).

 3.2          NON-IP ASSETS CONSIDERATION

              The full consideration for the Non-IP Assets shall be the
              following:

             (a)   ten million, nine hundred and twenty five thousand, four
                   hundred and eighteen dollars ($10,925,418 ); and

             (b)   the assumption by Saville Australia of the Assumed 
                   Liabilities.

 3.3          COMPLETION DEBTS AND WORK IN PROGRESS WARRANTY

              BHA, BHAC and the Vendors' Guarantors covenant, warrant, represent
              and undertake to and with the Purchasers and each of them that the
              total true and correct face amounts of the Completion Debts and
              the Work in Progress are the amounts set out in Schedule 14.

 3.4          APPORTIONMENT

              The Non-IP Assets Consideration, other than the Assumed
              Liabilities, shall be apportioned between the Non-IP Assets as
              follows:

              (a)   $ 9,841,671 for the BHA Goodwill;

              (b)   $1.00 for the BHAC Goodwill;

              (c)   $1.00 for the BHA Plant and Equipment (which sum, together
                    with that which was paid in respect of the BHAC Plant and
                    equipment, is apportioned and appropriated between each
                    constituent item of the Plant and Equipment in Schedule 6
                    according to the respective values assigned thereto);

              (d)   $409,448 for the BHAC Plant and Equipment;

              (e)   $1.00 for the Inventory;
<PAGE>
 
              (f)   $264 for the Motor Vehicles (which sum is apportioned and
                    appropriated between each constituent item of the Motor
                    Vehicles in Schedule 5 according to the respective values
                    assigned thereto);

              (g)   $1.00 for the Company Names;

              (h)   $1.00 for the Business Names;

              (i)   $1.00 for the Domain Names;

              (j)   $1.00 for the Brand Names;

              (k)   $1.00 for the Email Addresses

              (l)   $1.00 for the Telephone Services;

              (m)   $1.00 for the Business Records (other than Excluded Business
                    Records);

              (n)   $1.00 for the cash, including cash on hand and cash
                    equivalent and funds held with an bank or financial
                    institution and security held or entitled to be held by BHAC
                    at Completion;

              (o)   $1.00 for the rights and benefits of the Vendor under the
                    Business Contracts;

              (p)   $1.00 for the rights and benefits of the Vendor under the
                    Premises Leases;

              (q)   $1.00 for the Permits;

              (r)   $1.00 for all Business Claims;

              (s)   $1.00 for the Systems;

              (t)   $127,019 for the Prepayment Benefits;

              (u)   $67,000 for the restraint of trade in respect of BHAC
                    pursuant to clause 13;

              (v)   $335,000 for the restraint of trade in respect of BHA
                    pursuant to clause 13;
<PAGE>
 
              (w)   $135,000 for the restraint of trade in respect of John
                    Edward Hendry pursuant to clause 13;

              (x)   $10,000 for the restraint of trade of Prudence Marianne
                    Hendry pursuant to clause 13; and

              (y)   $1.00 for the Other Assets.

 3.5          ALLOCATION OF PURCHASE PRICE

              The Vendors hereby direct the Purchasers to allocate the Purchase
              Price between the Vendors as follows:

              (a)   To BHA: eleven million, four hundred and eight thousand,
                    three hundred and thirty six dollars ($ 11,408,336); and

              (b)   To BHAC: four million, two hundred and eighteen thousand,
                    seven hundred and thirty-one dollars ($4,218,731).

 4.           COMPLETION

 4.1          COMPLETION DATE AND PLACE

              Completion shall take place at the offices of Clayton Utz,
              Brisbane, on 3 April 1998 at 4.30pm or such other date as the
              parties may agree upon in writing.

 4.2          VENDOR'S OBLIGATIONS ON COMPLETION

              Subject to the Purchaser satisfying its obligations under clause
              43, the Vendor shall on Completion:

              (a)   (POSSESSION): give and deliver to the Purchaser:

                    (i)    the Plant and Equipment;
                    (ii)   Motor Vehicles;
                    (ii)   Business Records (other than the Excluded Business
                           Records);
                    (iv)   hired, leased or any other assets the subject of any
                           of the Business Contracts as are in the possession of
                           the Vendor;
                    (v)    Leased Properties (subject, where required, to the
                           Lessor's consent);
                    (vi)   all cash  including cash on hand and cash equivalent
<PAGE>
 
                           and funds held with any bank or financial institution
                           and security held or entitled to be held by at
                           Completion; and

                    (vii)  Other Assets,

                    delivery to be made by leaving the same (other than goods in
                    transit and Motor Vehicles used by Transferring Employees)
                    where then situate or at such other location as may be
                    agreed;

              (b)   (TRANSFERS OF MOTOR VEHICLES): deliver to Saville Australia
                    or its nominee appropriate forms of transfer, duly executed
                    by the Vendor, of each of the Motor Vehicles and
                    certificates of roadworthiness in respect of the same;

              (c)   (CHANGE OF COMPANY NAME): deliver to Saville Australia
                    certified copies of all documents evidencing the change of
                    names of the Vendors pursuant to clause 135 hereof;

              (d)   (TRANSFER OF BUSINESS NAMES): deliver to Saville Australia
                    duly executed transfers (and/or its consent and/or the
                    consent of any Related Body Corporate of the Vendors, in
                    forms satisfactory to Saville Australia, naming Saville
                    Australia as proprietor) of the Business Names;

              (e)   (TRANSFER OF DOMAIN NAMES): deliver to Saville Australia
                    duly executed transfers of the Domain Names and Email
                    Addresses;

              (f)   (TRANSFER OF INTELLECTUAL PROPERTY): deliver to Saville
                    Ireland duly executed assignments of all trade marks,
                    designs, patents and copyrights included in the Intellectual
                    Property;

              (g)   (TRANSFER OF BRAND NAMES): deliver to Saville Australia duly
                    executed assignments of all Brand Names;

              (h)   (CERTIFICATES OF REGISTRATION AND ORIGINALS OF PREMISES
                    LEASES AND BUSINESS CONTRACTS): deliver to Saville Australia
                    registration certificates and other documents of title for
                    the Non-IP Assets and stamped originals of the Premises
                    Leases and Business Contracts;

              (i)   (NOTICES AND DOCUMENTS): deliver to Saville Australia or
                    Saville Ireland as required such notices and other documents
                    as may be required to be executed or registered under any
                    Statute or otherwise or reasonably requested by a Purchaser
                    in connection with the sale and/or assignment of the Assets;
<PAGE>
 
         (j)  (SERVICES): cause the Telephone Services to be transferred to
              Saville Australia or, as required by Saville Australia, surrender
              or cause to be surrendered all telephone and related lines,
              electricity, gas and other utility services of the Business as
              relate to the Leased Properties and use its best endeavours to
              assist the transfer or grant of such services or the grant of new
              services to Saville Australia;

         (k)  (PERMITS): assign or transfer the Permits to Saville Australia;

         (l)  (BUSINESS CLAIMS): assign or transfer to Saville Australia the
              Business Claims;

         (m)  (SYSTEMS): assign or transfer the Systems to Saville Australia;

         (n)  (PREPAYMENT BENEFITS): assign or transfer the Prepayment Benefits
              to Saville Australia;

         (o)  (QIT LICENCE): deliver the duly executed QIT Licence;

         (p)  (KANGAROO POINT LEASE): deliver all documents necessary or
              desirable, duly stamped, to enable the surrender of the existing
              lease over the Kangaroo Point Premises referred to in clause 6.3
              hereof and the new lease to Saville Australia pursuant to clause
              6.3 hereof, in form for immediate registration;

         (q)  (UNCONDITIONAL FINANCIAL UNDERTAKING): deliver the duly executed
              Unconditional Financial Undertaking pursuant to clause 116 hereof;

         (r)  (TECHNICAL ASSISTANCE AGREEMENT): deliver the duly executed
              Technical Assistance Agreement pursuant to clause 2.4 hereof; and

         (s)  (OTHER OBLIGATIONS): each of the Vendors will perform all other
              obligations to be performed by a Vendor on Completion under any
              other clause of this Agreement.

 4.3     PURCHASERS OBLIGATIONS ON COMPLETION

         Subject to the Vendors satisfying their respective obligations under
         clause 4.2, on Completion:
<PAGE>
 
         (a)  Saville Australia shall pay or satisfy, as the case may be, to the
              Vendors the Non-IP Assets Consideration as adjusted to take into
              account all other payments or allowances due to be made on
              Completion by Saville Australia to the Vendors or by the Vendors
              to Saville Australia

         (b)  Saville Ireland shall pay or satisfy as the case may be, to the
              Vendors the IP Assets consideration adjusted to take into account
              all other payments or allowances due to be made on Completion by
              Saville Ireland to the Vendors or by the Vendors to Saville
              Ireland; and

         (c)  the Purchasers shall perform all other obligations to be performed
              by the Purchasers on Completion under any other clause of this
              Agreement.

 4.4     TITLE AND RISK
         
         (a)  Upon Completion, title to the IP Assets shall pass to Saville
              Ireland free from all Encumbrances and title to the Non-IP Assets
              shall pass to Saville Australia free from all Encumbrances.
         
         (b)  Upon Completion, risk in the IP Assets shall pass to Saville
              Ireland and risk in the Non-IP Assets shall pass to Saville
              Australia.
         
 4.5     SALE AND PURCHASE OF ASSETS INTERDEPENDENT
         
         The sale and purchase of each of the Assets is interdependent and shall
         be completed simultaneously.
         
 4.6     FURTHER ASSURANCE
         
         After Completion each of the Vendors shall do all other things
         reasonably necessary or reasonably required by Saville Ireland or
         Saville Australia for putting Saville Ireland or Saville Australia, as
         the case may be, in full possession and control of the IP Assets and
         the Non-IP Assets and to complete the transfer of the Assets. In
         particular the Vendors shall provide or cause to be provided to Saville
         Australia introduction to customers of the Business and the Vendors
         shall use their best endeavours to ensure that such customers become
         and remain customers of Saville Australia.
<PAGE>
 
 4.7          SUCCESSION

              After Completion Saville Australia shall be entitled to represent
              itself to the suppliers and customers of the Business as the
              successor to the Vendors in the Business.

 5.           DEBTS AND LIABILITIES

 5.1          ASSUMED LIABILITIES

              At Completion Saville Australia shall assume the Assumed
              Liabilities.

 5.2          DEBTS AND LIABILITIES OWING BY THE VENDOR

              (a)  Except for the Assumed Liabilities, no debts, obligations or
                   liabilities of a Vendor in respect of the Business are being
                   undertaken or assumed by a Purchaser, and accordingly, except
                   for the Assumed Liabilities, the Vendors shall remain solely
                   responsible for the payment, satisfaction and discharge of
                   all such debts, obligations and liabilities and the Vendors
                   shall pay and discharge in the ordinary course of business
                   all such debts, obligations and liabilities.

              (b)  Without in any way limiting clause 5.2(a), the Purchasers
                   shall not undertake or assume any debt, obligation or
                   liability of a Vendor:

                   (i)    for any environmental conditions existing on or prior
                          to Completion at any facility or Premises owned,
                          operated or leased by a Vendor prior to Completion or
                          at any site to which any material generated by a
                          Vendor was transported prior to Completion or
                          otherwise as a result of the conduct of the Business
                          prior to Completion;

                   (ii)   for any revenue or taxes attributable to periods prior
                          to Completion;

                   (iii)  to any retired or other former Employees of a Vendor;

                   (iv)   under any superannuation, pension or other benefit or
                          welfare plan maintained at any time by a Vendor;

                   (v)    under any agreements with any employees of a Vendor
                          providing for severance payments; or
<PAGE>
 
                   (vi)   to another Vendor or Related Body Corporate or to any
                          shareholder of a Vendor or Related Body Corporate.

 5.3          DEBTS OWING TO THE VENDOR AND TO THE PURCHASER

              (a)  BHAC shall be entitled to receive and keep for its own
                   benefit payment of the Completion Debts and in respect of the
                   Work in Progress.

              (b)  Saville Australia shall be entitled to receive and keep for
                   its own benefit payments made or to be made in relation to
                   all debts due to it for services provided, sold or supplied
                   by it or otherwise due to it in the conduct of the Business
                   after Completion.

 5.4          COLLECTION OF TRADE RECEIVABLES

              (a)  Saville Australia shall for a period of six (6) months
                   immediately following the Completion Date at no cost to BHAC
                   and on behalf of BHAC provide staff assistance in relation to
                   the collection of the Trade Receivables to the same extent as
                   if the Trade Receivables were owned by Saville Australia.

              (b)  Saville Australia shall invoice the Work in Progress after
                   Completion, the timing for which shall be substantially
                   similar to that used by Purchasers in conducting the Business
                   in the ordinary course and, after such invoicing, treat such
                   work in progress as a Trade Receivable in accordance with
                   clause 5.4(a) hereof.

              (c)  Any amount received by Saville Australia from a debtor of the
                   Business shall, when the amount cannot be identified as
                   having been paid in respect of a particular invoice, be
                   applied in payment of the oldest outstanding debt of that
                   debtor unless otherwise indicated in writing by that debtor.

 5.5          PURCHASER TO PASS ON OTHER DEBTS RECEIVED

              If Saville Australia receives a payment in respect of any of the
              Completion Debts (not being a Trade Receivable), Saville Australia
              shall promptly pay the amount received to BHAC.
<PAGE>
 
 5.6          ACTIONS IN RESPECT OF COMPLETION DEBTS

              (a)  The Purchaser shall not have authority to nor be obliged to
                   commence, continue or defend either alone or jointly with or
                   on behalf of BHAC, any legal action for the recovery of any
                   Completion Debts.

              (b)  The Purchaser shall not be liable for any loss or damage
                   suffered by the Vendors as a result of or in any way arising
                   from or in connection with any act, omission, neglect or
                   default other than wilful neglect or default of Saville
                   Australia, its servants or agents in relation to the staff
                   assistance provided by Saville Australia in respect of the
                   Trade Receivables.

              (c)  Saville Australia shall for a period of 12 months after the
                   Completion Date allow the Vendors reasonable access to and to
                   photocopy the Business Records.

 6.           PREMISES LEASES

 6.1          ASSIGNMENT OF PREMISES LEASES

              In respect of each of the Premises Leases:

              (a)  upon Completion BHAC shall assign its rights and benefits
                   under the Premises Leases to Saville Australia with effect
                   from Completion;

              (b)  where the Premises Lease provides that assignments shall only
                   be permitted following the lessor's consent then prior to
                   such assignment any relevant lessor's consents, any necessary
                   mortgagee consents and the consent of any other party which
                   must give consent, shall be obtained by BHAC at the expense
                   of BHAC;

              (c)  Saville Australia shall accept such assignments and shall
                   execute any agreements or deeds that may reasonably be
                   required by the relevant lessor as a condition of the
                   lessor's consent.

 6.2          DOCUMENTATION

              The Vendor will on Completion deliver to the Purchaser a true copy
              of the Premises Leases.
<PAGE>
 
 6.3          KANGAROO POINT PREMISES

              (a)  On Completion, BHA and BHAC shall each surrender any and all
                   existing leases and licences in respect of that Leased
                   Property situated at 59-69 Shaftson Avenue, Kangaroo Point,
                   Brisbane.

              (b)  On Completion BHA shall grant to Saville Australia a lease of
                   that Leased Property situated at 59-69 Shafston Avenue,
                   Kangaroo Point, Brisbane

              (c)  The period of the lease shall commence on the Completion Date
                   and expire on 30 June 1999.

              (d)  The terms and conditions of the lease other than as
                   hereinbefore set forth shall (sofar as reasonably applicable)
                   be those set forth in the form of lease contained in Schedule
                   18.

 6.4          INDEMNITIES

              In respect of each of the Premises Leases assigned under clause
              6.1:

              (a)  BHAC shall be responsible for complying with all obligations
                   under each lease in respect of the period up to and including
                   Completion and shall indemnify Saville Australia and keep
                   Saville Australia indemnified against all liabilities,
                   claims, demands, actions, suits, proceedings, costs, damages
                   and expenses arising out of or in relation to the non-
                   payment, non-observance, or non-performance of any
                   obligations arising in respect of each lease on and before
                   Completion; and

              (b)  Saville Australia shall be responsible for complying with all
                   obligations under each lease in respect of the period
                   following Completion and shall indemnify and keep indemnified
                   BHAC against all liabilities, claims, demands, actions,
                   suits, proceedings, costs, damages and expenses arising out
                   of or in relation to the non-payment, non-observance, or non-
                   performance of any obligations arising in respect of each
                   lease after Completion.

 6.5          OBLIGATIONS PENDING ASSIGNMENTS

              If any of the Premises Leases are not assigned to Saville
              Australia on Completion, then pending their assignment after
              Completion:

              (a)  to the extent it is lawfully able, BHAC shall procure that
                   such 
<PAGE>
 
                   Premises Lease continues in full force and effect and
                   shall allow Saville Australia to use or occupy the properties
                   the subject of such Premises Leases as licensee; and

              (b)  to the extent it is lawfully able, Saville Australia shall
                   perform all obligations of BHAC thereunder in respect of the
                   period following Completion and BHAC shall, to the extent to
                   which Saville Australia is unable to lawfully perform an
                   obligation or exercise a right of BHAC under the Premises
                   Lease, upon the request and at the expense of Saville
                   Australia perform that obligation or exercise that right.

 7.           BUSINESS CONTRACTS

 7.1          ASSIGNMENT OF BUSINESS CONTRACTS ON COMPLETION

              (a) (ASSIGNMENT OF LISTED BUSINESS CONTRACTS):

                  (i)    The Vendors and the Vendors' Guarantors represent and
                         warrant that each of the other parties to each of the
                         Business Contracts listed in Part A of Schedule 8 has
                         agreed to those Business Contracts being assigned to
                         Saville Australia and to performance of obligations
                         being subcontracted to Saville Australia with effect on
                         and from Completion;

                  (ii)   BHA or BHAC, as the case may be, hereby assigns to
                         Saville Australia the benefit of the Business Contracts
                         listed in Part A of Schedule 8 and hereby sub-contracts
                         to Saville Australia the performance of obligations
                         under the Business Contracts listed in Part A of
                         Schedule 8, with effect on and from Completion.

              (b)  (ASSIGNMENTS WITHOUT CONSENT OF NON-LISTED BUSINESS
                   CONTRACTS): BHAC or BHA, as the case may be, hereby assigns
                   to Saville Australia with effect on and from Completion the
                   benefit of those of the Business Contracts not listed in Part
                   A of Schedule 8 in respect of which assignments are permitted
                   without the consent of the other party to such contract.
<PAGE>
 
 7.2          NOVATIONS OR ASSIGNMENTS AFTER COMPLETION

              (a)  For a period of 3 months after Completion, BHA and BHAC, as
                   the case may be, shall use its best endeavours (short of
                   paying money or providing other valuable consideration to or
                   for the benefit of the other party thereto) with the
                   cooperation of Saville Australia to procure the agreement of
                   the other party to those of the Business Contracts not
                   assigned or agreed to be assigned pursuant to clause 7.1
                   being novated or assigned to Saville Australia by and with
                   effect from Completion.

              (b)  On request by Saville Australia from time to time within 3
                   months after Completion, BHAC or BHA, as the case may be,
                   shall at the expense of Saville Australia co-operate with
                   Saville Australia in relation to any novation or assignment
                   of any of the Business Contracts procured after Completion by
                   Saville Australia.

              (c)  The parties agree that the $250,000 paid by the Purchasers in
                   respect of each Business Contract listed in Part B of
                   Schedule 8 will become due and payable within 90 days of
                   Completion, unless the Business Contract is terminated by the
                   other party to the Business Contract within 90 days of
                   Completion.

              (d)  If the $250,000 paid by the Purchaser in respect of a
                   Business Contract listed in Part B of Schedule 8 does not
                   become due and payable then the $250,000 paid in respect of
                   that Business Contract will be refunded by the Vendors to the
                   Purchasers within 100 days of Completion.

 7.3          OBLIGATIONS PENDING OR IF NO NOVATION OR ASSIGNMENT

              If any of the Business Contracts are not novated or assigned under
              clause 7.1 then, unless and until such a novation or assignment
              occurs under clause 7.2, if:

              (a)  BHAC or BHA, as the case may be, is not prohibited from
                   delegating or subcontracting performance of obligations under
                   such Business Contract, Saville Australia shall perform on
                   behalf of BHAC or BHA all obligations of BHAC or BHA
                   thereunder in respect of the period following Completion and
                   providing that Saville Australia performs such obligations,
                   BHAC or BHA shall account to Saville Australia for any
                   amounts paid by the other party to such Business Contract to
                   BHAC or BHA after Completion in respect of that contract;
<PAGE>
 
              (b)  BHAC or BHA, as the case may be, is prohibited under any such
                   Business Contract from delegating or subcontracting
                   performance of some or all of the obligations thereunder:

                   (i)    BHAC or BHA will retain the benefit of the Business
                          Contract;
                   (ii)   the Assumed Liabilities relating to the Business
                          Contract will not be assumed by Saville Australia
                          under clause 5.1;
                   (iii)  Saville Australia will provide BHA or BHAC with the
                          services reasonably necessary for BHA or BHAC to
                          fulfill the obligations under the Business Contract;
                   (iv)   Saville Ireland will licence to BHA or BHAC any
                          Intellectual Property reasonably necessary for BHA or
                          BHA to fulfil the obligations under the Business
                          Contract;
                   (v)    BHA or BHAC will, within 30 days after the end of each
                          calendar month pay a fee to Saville Australia equal to
                          the amount BHA or BHAC is entitled to receive under
                          that Business Contract, during that calendar month,
                          for the services supplied by Saville Australia;
                   (vi)   BHA or BHAC will, at the written request of Saville
                          Australia, do all things necessary to terminate the
                          Business Contract as soon as possible, except for any
                          act or omission which would result in BHA or BHAC
                          being in breach of the Business Contract or would
                          require the payment of money by BHA or BHAC due to the
                          termination;
                   (vii)  Saville Australia will assist BHA or BHAC in the
                          enforcement of any or all rights of BHA or BHAC
                          against the other party to the Business Contract.

 7.4          INDEMNITIES

              (a)  Except for the Assumed Liabilities, BHAC or BHA, as the case
                   may be, shall be responsible for complying with all
                   obligations under the Business Contracts in respect of the
                   period up to and including Completion, and shall indemnify
                   Saville Australia and keep Saville Australia indemnified
                   against all liabilities, claims, demands, actions, suits,
                   proceedings, costs, damages and expenses arising out of or in
                   relation to the non-payment, non-observance, or non-
                   performance of any obligations arising under, or arising in
                   respect of the Business Contracts or founded upon any fact,
<PAGE>
 
                   matter, occurrence, event or circumstance happening during or
                   in respect of that period.

              (b)  In respect of each of the Business Contracts assigned under
                   this clause 7 Saville Australia is responsible for complying
                   with all obligations under such Business Contracts in respect
                   of the period following the effective date of assignment.

              (c)  In respect of the Business Contracts where Saville Australia
                   is to perform obligations under clause 7.3 for a particular
                   period, Saville Australia indemnifies BHAC or BHA, as the
                   case may be, and will keep BHAC or BHA indemnified against
                   all liabilities, claims, demands, actions, suits,
                   proceedings, costs, damages and expenses arising out of or in
                   relation to the non-payment, non-observance, or non-
                   performance of any such obligations of Saville Australia
                   arising under, or arising in respect of such Business
                   Contracts or founded upon any fact, matter, occurrence, event
                   or circumstance happening during or in respect of that period
                   for which Saville Australia is responsible under clause 7.3.

 8.           EMPLOYEES

 8.1          PARTICULARS OF EMPLOYEES

              The Vendors warrant that prior to the Completion Date BHAC has
              supplied to the Purchaser a current list of all the Employees
              giving details of the name, date of birth, sex, position, title or
              classification, salary or wage, relevant award, rate of
              remuneration and date of commencement of employment (and reason
              for termination of employment if it was broken for a period
              insofar as is necessary to determine long service leave
              entitlements), of each of the Employees and any actual,
              conditional or contingent entitlements to holiday pay, annual,
              sick and long service leave, any motor vehicle provided or
              allowance paid in lieu thereof and any other payments, allowances
              or benefits derived by each of the Employees by virtue of his
              employment by a Vendor and other relevant conditions of the
              employment of each of the Employees and all such amounts have been
              accrued on the Most Recent Balance Sheet.

 8.2          OFFER OF EMPLOYMENT

              Prior to Completion Saville Australia has offered employment to
              such of the Employees as are listed in Schedule 12 hereto, to
              commence from the day after the Completion Date. Unless otherwise
              agreed in writing by BHAC and Saville Australia the employment so
              offered shall be on terms and 
<PAGE>
 
              conditions as to wages and salaries no less favourable than those
              on which the Employees are employed on the date of this Agreement.

 8.3          ACCEPTANCE OF OFFERS OF EMPLOYMENT

              The Vendors shall use their best endeavours to procure the
              acceptance by those Employees receiving offers of employment in
              Saville Australia, or in the case of an apprentice procure that
              apprentice's agreement to the transfer of the indenture of
              apprenticeship, and as at the Specified Time the services of each
              Employee who accepts such offer of employment shall be terminated
              by the Vendor and shall be employed by Saville Australia.

 8.4          TRANSFERRING EMPLOYEES

              The following provisions apply to the Transferring Employees:

              (a)  the Vendors will pay to each Transferring Employee the amount
                   of is accumulated wages and salary entitlements as at the
                   Specified Time whether pursuant to contract, award, statue or
                   otherwise and in relation thereto, will keep the Purchasers
                   indemnified against all claims made from time to time in the
                   future after the completion Date by such Transferring
                   Employee against a Purchaser;

              (b)  the Vendors will pay each Transferring Employee all annual
                   leave entitlements which exceed a period of 4 weeks as at the
                   Specified Time; and

              (c)  the Purchasers will indemnify the Vendors in respect of any
                   payments made to Transferring Employees under clause 8.4(b).

8.5           PAYMENTS

              (a)  Amounts payable under clause 8.4(a) will be paid within 7
                   days of the Completion Date.

              (b)  Amounts payable under clause 8.4(b) will be paid within 30
                   days of the Completion Date.

              (c)  Amounts payable under clause 8.4(c) will be paid within 10
                   days of the Vendors notifying that all payments under clause
                   8.4(b) have been paid.
<PAGE>
 
 8.6          WRITTEN EVIDENCE OF PAYMENTS

              The Vendors shall furnish to Saville Australia on or before
              Completion full details of the calculation and written evidence of
              the receipt by any such Transferring Employee of any payment made
              directly to such Transferring Employee under this clause 8.

 8.7          INDEMNITY

              Subject to compliance by the Vendors with their obligations under
              clause 8.4, after the Completion Date Saville Australia shall be
              solely responsible for and shall keep the Vendors indemnified
              against all claims, costs and expenses associated with or made in
              respect of accumulated wages and salary attributable to the period
              after the Completion Date or associated with or made in respect of
              annual leave, sick leave and long service leave entitlements of
              the Transferring Employees whether attributable to their
              employment before or after the Completion Date, and Saville
              Australia covenants with the Vendors that it will treat every such
              Transferring Employee and deal with every such entitlement as if
              every such entitlement had been accrued by the respective
              Transferring Employee while in the employment of Saville
              Australia.
<PAGE>
 
 8.8          SUPERANNUATION

              (a)  In relation to each Transferring Employee, the Vendors shall
                   retain the responsibility for and shall indemnify and keep
                   indemnified Saville Australia in respect of any minimum
                   superannuation support to be provided by the Vendors in
                   respect of each such Employee up to and including the
                   completion Date in terms of the provisions of the
                   Superannuation Guarantee (Administration) Act, the
                   Superannuation Guarantee Charge Act and any associated
                   legislation and all costs, expenses, claims and charges in
                   respect thereof.

              (b)  In relation to each Transferring Employee, the Vendor shall
                   retain the responsibility for and shall indemnify and keep
                   indemnified Saville Australia in respect of any claim lodged
                   or made by any such Transferring Employee and whether lodged
                   prior to or subsequent to the Completion Date in relation to
                   any other claim under any contract, law, regulation
                   whatsoever in relation to the provision of superannuation
                   benefits where and to the extent that such a claim is founded
                   upon an event or circumstance alleged to have occurred during
                   the claimant's employment by a Vendor.

              (c)  Saville Australia shall not be obliged to make any
                   contributions to any superannuation fund to which
                   contributions formerly were made by any such Vendor in
                   respect of any relevant Transferring Employee.

                   Saville Australia however may offer alternative
                   superannuation arrangements to those Employees on such terms
                   and in its absolute discretion as it thinks fit.

 8.9          WORKERS' COMPENSATION

              In relation to each Transferring Employee, the Vendors shall
              retain the responsibility for and shall indemnify Saville
              Australia in respect of any workers' compensation claim lodged by
              any such Transferring Employee and whether lodged prior or
              subsequent to the Completion Date where and to the extent that
              such claim is founded upon an event or circumstance alleged to
              have occurred during the claimant's employment by a Vendor.
<PAGE>
 
 8.10         REDUNDANCY PAYMENTS

              The Vendors shall be liable for and shall indemnify Saville
              Australia in respect of all amounts payable by way of redundancy
              payments and payments in lieu of notice of termination to the
              Employees (other than Transferring Employees) arising from
              termination of their employment by a Vendor whether before, on or
              after the Completion Date.

 9.           CLAIMS BY CUSTOMERS

 9.1          PURCHASER'S AFTER-SALES SERVICE OBLIGATIONS

              Saville Australia shall upon reasonable written request by BHAC
              provide reasonable staff assistance to BHAC:

              (a)  in the investigation and settlement of any Customer Claims;

              (b)  in undertaking any timely rectification or replacement of
                   defective or unsatisfactory services provided, sold or
                   supplied, which are the subject of any such Customer Claims;
                   and

              (c)  in pursuing recovery through the normal avenues from any
                   principal, manufacturers or suppliers.

 9.2          VENDOR'S INDEMNITY

              BHAC shall indemnify Saville Australia in respect of any losses,
              expenses, liabilities, damages and costs, which are not Assumed
              Liabilities, resulting from or incurred by Saville Australia in
              connection with any Customer Claims including any costs incurred
              by Saville Australia in providing staff assistance under clause
              9.1.

 9.3          CONDUCT OF LITIGATION

              (a)  Saville Australia shall keep BHAC fully informed of all
                   Customer Claims which have been presented to Saville
                   Australia or of which Saville Australia is aware and BHAC
                   shall be entitled to inspect all records relating to such
                   Customer Claims.

              (b)  BHAC shall at all times be entitled to take over and conduct
                   at its own cost any action associated with any Customer
                   Claims.

              (c)  Saville Australia shall not make any admissions prejudicial
                   to the interests of BHAC to customers in relation to any
                   Customer 
<PAGE>
 
                   Claims and shall permit BHAC to have full control of the
                   satisfaction, defence and settlement of Customer Claims.

 9.4          PURCHASER IS RESPONSIBLE FOR POST-COMPLETION SERVICES

              Saville Australia shall be responsible for satisfying and bearing
              all costs associated with all claims made in respect of services
              of the Business which after the Completion Date are provided, sold
              or supplied by Saville Australia and shall keep BHAC indemnified
              against all liability of whatsoever nature in relation to any such
              claims.

 10.          ACCESS TO EXCLUDED BUSINESS RECORDS AFTER COMPLETION

              BHAC shall for a period of 36 months after the Completion Date
              allow Saville Australia reasonable access to and to photocopy the
              Excluded Business Records.

 11.          WARRANTIES

 11.1         VENDOR'S WARRANTIES

              (a)  As part of the terms of the sale of the Assets and the
                   Business the Vendors jointly and each of them severally and
                   the Vendors' Guarantors covenant, warrant, represent and
                   undertake to and with the Purchasers and each of them in the
                   terms set out in Schedule 7 and so warrant as at a time
                   immediately before Completion it being a term of this
                   Agreement that each of the covenants, warranties,
                   undertakings and representations are true and correct, except
                   as set forth in the Disclosure Schedule, in every respect and
                   shall be construed separately and the meaning of each shall
                   in no way be limited by reference to any other clause or
                   paragraph contained herein.

              (b)  The Disclosure Schedule shall be arranged in paragraphs
                   corresponding to the numbered and lettered paragraphs
                   contained in Schedule 7, and the disclosures in any paragraph
                   shall qualify only the corresponding paragraph in Schedule 7.

              (c)  The Warranties are given subject to matters fully and
                   completely disclosed in the Disclosure Schedule. Neither
                   Saville Australia nor Saville Ireland may claim that any fact
                   or circumstance disclosed in the Disclosure Schedule in
                   respect of a Warranty constitutes a breach of that Warranty.
<PAGE>
 
              (d)  The Vendors shall not be liable for any loss or damage
                   (including consequential loss) for which the Vendors may
                   otherwise have been liable arising from breach of a Warranty
                   but for the Vendors having disclosed a fact or circumstance
                   in respect of that Warranty in the Disclosure Schedule.

              (e)  No other information relating to the Business or the Assets
                   of which Saville Australia or Saville Ireland has knowledge
                   actual or constructive will, subject to this clause 11
                   prejudice any claim made by Saville Australia or Saville
                   Ireland under any Warranty nor operate to reduce any amount
                   recoverable.

 11.2         SURVIVAL OF WARRANTIES AND COVENANTS

              Each of the representations, warranties, covenants and
              undertakings herein contained shall remain in full force and
              effect on and after the Completion Date notwithstanding
              Completion, and is and shall be given to the intent that liability
              thereunder shall not be confined to breaches discovered on or
              prior to the Completion Date.

 11.3         ASSISTANCE

              (a)  Each of the Vendors shall on and from the Completion Date
                   take all such steps and provide all such information and
                   documents with regard to the Business and the Assets as the
                   Purchasers or either of them, their solicitors, accountants
                   and other advisers may reasonably require, and shall give
                   such assistance and facilities as they may reasonably require
                   to enable them to fully review the Business and the Assets
                   and to satisfy themselves respectively as to the accuracy of
                   the representations, undertakings, warranties and covenants
                   contained herein.

              (b)  No information relating to the Business of which the
                   Purchasers have knowledge (actual or constructive) shall
                   prejudice any claim made by the Purchasers or either of them
                   under or operate to reduce any amount recoverable by the
                   Purchasers or either of them for breach of any of the
                   covenants, warranties, representations and undertakings
                   contained in this Agreement and without prejudice to the
                   generality of the foregoing the Vendors agree that the rights
                   and remedies of each of the Purchasers in relation to any of
                   the covenants, warranties, representations and undertakings
                   contained in this Agreement shall not be affected by any
                   investigation made or to be made by or on behalf of the
<PAGE>
 
                   Purchasers about the Business.

 11.4         INDEMNITY

              Each of the Vendors and the Vendors' Guarantors shall indemnify
              and hold each of the Purchasers harmless against all losses,
              claims, costs, demands, liabilities and expenses whatsoever and
              howsoever arising, whether by way of depletion of the Assets or
              diminution of the Goodwill or otherwise, which may be suffered,
              sustained or incurred by either of the Purchasers as a result of
              or in respect of whether directly or indirectly a breach by any of
              the Vendors or the Vendors' Guarantors of any of the warranties,
              covenants, undertakings or representations referred to or
              contained in this Agreement or in any Schedule or any certificate,
              document or instrument executed in connection herewith.

 11.5         LIMITATION OF INDEMNITIES

              (a)  The Purchasers have no right to indemnification under clause
                   11.4 with respect to the actual or alleged breach of any
                   representation or warranty in sections 2(a) through (d), 3(f)
                   through (k), 5, 6, 7, 8, 9, 10, 13, 14, 16, 17, 18, 19, 20,
                   21, and 22 of Schedule 7, except with respect to matters as
                   to which a Vendor has received a claim by written notice,
                   specifying the details of the claim on or before the date
                   three (3) years after the Completion Date.

              (b)  The Purchasers have no right to indemnification under clause
                   11.4 with respect to the actual or alleged breach of any
                   representation or warranty in sections 4 and 11 of Schedule
                   7, except with respect to matters as to which a Vendor has
                   received a claim from a Purchaser by written notice,
                   specifying the details of the claim on or before 90 days
                   after the expiration of the applicable underlying statute of
                   limitations.

              (c)  The right of the Purchasers to be indemnified under clause
                   11.4, for indemnification with respect to the actual or
                   alleged breach of any representation or warranty in sections
                   2(a) through (d), 3(f) through (k), 5, 6, 7, 8, 9, 17, 18,
                   20, 21, 22 and 23 of Schedule 7, is limited to the amount of
                   the Purchase Price.

              (d)  The right of the Purchasers to be indemnified under clause
                   11.4 shall not apply until the sum of the damages suffered by
                   the Purchasers on a cumulative basis, as to which the
                   Purchasers would be entitled to indemnification under clause
                   11.4 but for the provisions of this sentence, equals or
                   exceeds $50,000, at which 
<PAGE>
 
                   point the Vendor's are liable for all such damages, not just
                   amounts in excess of $50,000.

              (e)  Notwithstanding the foregoing, this clause 11.5 shall not
                   apply in the event that a Vendor or the Vendor's Guarantor
                   has actual knowledge of a breach of a representation or
                   warranty as at the Completion Date.

              (f)  If, after the Vendors have made a payment to the Purchaser
                   pursuant to a Business Claim made under the Warranties, the
                   Purchaser receives any insurance payable by reason of the
                   matters to which the Business Claim specifically relates,
                   then the Purchaser must forthwith repay to the Vendors a sum
                   corresponding to the amount of such payment.

              (g)  If any facts arise to the knowledge of Saville Australia or
                   Saville Ireland which might give rise to a Business Claim
                   under the Warranties, Saville Australia must promptly give
                   written notice of that Business Claim to the Vendors setting
                   out reasonable particulars thereof and if then determinable a
                   reasonable estimate of the amount of the Business Claim
                   provided that delay or failure to notify shall not prejudice
                   or waive the rights of Saville Australia or Saville Ireland
                   except to the extent that the Vendors have been harmed by
                   such delay or failure.

              (h)  Saville Australia must, if the Vendors request within 28 days
                   of the notice referred to in sub-clause 11.5(g) being given
                   and thereafter with due expedition, take such action as the
                   Vendors may reasonably request from time to time by notice to
                   Saville Australia including, without limitation:

                   (i)     prosecute any action or proceedings, judicial or
                           otherwise, including the making of any counter claim
                           or cross claim against any person;

                   (ii)    conduct any negotiations and participate in any
                           investigation in respect of each Business Claim;

                   (iii)   not accept, pay or compromise any Business Claim
                           without the Vendors' prior written consent;

                   (iv)    cooperate and procure its solicitors, accountants and
                           other representatives to cooperate with the Vendor
                           and its solicitors, accountants and other
                           representatives in 
<PAGE>
 
                           respect of such Business Claim including, without
                           limitation, access by the Vendor or any of its
                           solicitors, accountants or other representatives to
                           all the books, documents files and records and
                           appropriate personnel of Saville Australia,

              in order to cause the demand or other action prompting the
              Business Claim to be withdrawn or to appeal against, compromise,
              contest, defend or settle such demand or other action. The matters
              referred to in sub-clauses 11.5(h)(i) to 11.5(h)(iv) may be
              conducted by the Vendor in the name and on behalf of the
              Purchaser. The Purchaser will not have any obligation to act at
              the request of the Vendors nor may the Vendors conduct the matters
              referred to in sub-clauses 11.5(h)(i) to 11.5(h)(iv) in the name
              of the Vendors on behalf of the Purchaser unless and until it is
              indemnified to the Purchaser's reasonable satisfaction by the
              Vendors against all losses, costs, damages and expenses which may
              be incurred.

         (i)  The Purchasers have no right to indemnification under clause 11.4
              for any loss, or liability (including consequential loss) in
              connection with the fitness of the IP Assets for any purpose where
              the Vendor has not used the IP Assets for that purpose, is not
              presently using the IP Assets for that purpose or has not proposed
              as at Completion to use the IP Assets for that purpose in the
              Business.


11.6     UNCONDITIONAL FINANCIAL UNDERTAKING

         (a)  The Vendors will on the Completion Date, provide security in the
              form of an unconditional and irrevocable financial undertaking
              from National Australia Bank ("THE UNDERTAKING"), for any loss or
              damage that a Purchaser may suffer for which it is entitled to
              indemnification by a Vendor or the Vendors' Guarantors pursuant to
              this Agreement.

         (b)  The Undertaking will be in the form and for the amount specified
              in Schedule 2.1.

         (c)  All charges incurred by the Vendors in obtaining and maintaining
              the Undertaking will be met by the Vendors.

         (d)  If, 6 months after the Completion Date, a Purchaser has not 
<PAGE>
 
              suffered or there has been no claim for any loss or damage for
              which a Purchaser is entitled to indemnification by a Vendor or
              the Vendors' Guarantors pursuant to this Agreement, the Purchasers
              will, within 14 days after receiving a written request from the
              Vendors, release the Undertaking in exchange for another
              Undertaking in substantially the same form for half of the sum
              specified in Schedule 21.

         (e)  If, 12 months after the Completion Date, a Purchaser has not
              suffered or there has been no claim for any loss or damage for
              which a Purchaser is entitled to indemnification by a Vendor or
              the Vendors' Guarantors pursuant to this Agreement, the Purchasers
              will, within 14 days after receiving a written request from the
              Vendors, release the Undertaking.

 11.7         YEAR 2000 WORK

              The Vendors have made certain representations and warranties of
              Year 2000 Compliance to customers of the Vendors' products known
              as CMS and MMS. The Vendors represent and warrant that no more
              than 500 and 600 professional hours are required to perform such
              representations and warranties in respect of CMS and MMS,
              respectively. To the extent that Saville Australia reasonably
              requires more than the hours set forth in the immediately
              preceding sentence to perform such representations and warranties
              or to make CMS and MMS Year 2000 Compliant, the Vendors shall
              promptly pay to Saville Australia $75 per additional professional
              hour required for such tasks. For the purposes of this clause
              11.7, a product shall by Year 2000 Compliant if and when such
              product has the functionality set forth in clauses 3.(k)(iv)
              through 3.(k)(x) of Schedule 7.

 11.8         MUTUAL WARRANTIES

              Each party warrants to each other party as at the date of this
              Agreement and on Completion that:

              (a)  it has the power and authority to enter into and perform its
                   obligations under this Agreement;

              (b)  this Agreement constitutes a legal, valid and binding
                   obligation of it fully enforceable (subject to due stamping)
                   in accordance with its terms (subject to bankruptcy,
                   insolvency or other laws affecting creditors rights generally
                   and general principles of equity);

              (c)  its execution, delivery and performance of this Agreement do
                   not
<PAGE>
 
                   and will not violate in any respect any provision of:

                   (i)    any legislation or rule of law or regulation,
                          authorisation, consent or other order or decree of any
                          government, authority of or applicable in its country
                          of incorporation;

                   (ii)   its constitution, Memorandum and Articles of
                          Association or any legislation, bylaws, rules or other
                          documents constituting it or governing its activities;
                          or

                   (iii)  any instrument to which it is a party or which is
                          binding upon it or any of its assets and do not and
                          will not result in the creation or imposition of any
                          incumbrance or restriction of any nature on any of its
                          assets; and

              (d)  no petition has been issued or is pending or is threatened to
                   be issued against it to wind it up, it has not resolved to
                   commence a winding up and no action has been taken or
                   threatened to be taken to place it in receivership or
                   voluntary administration, and no action has been taken or
                   threatened to be taken to seize or take possession of any of
                   its assets nor has any sequestration order been made or writ
                   of execution been issued against it or any of its assets.

 11.9         ACKNOWLEDGMENT

              Each of the Vendors and the Vendors' Guarantors acknowledges that
              each of the Purchasers has entered into this Agreement in reliance
              on the warranties and covenants set out in this Agreement.

 12.          INTELLECTUAL PROPERTY

 12.1         TECHNICAL ASSISTANCE

              The Vendors agree to cause John Edward Hendry and John Edward
              Hendry agrees to and shall on Completion execute a technical
              assistance agreement in the form set out in Schedule 19 with
              Saville Australia as a part of the consideration and inducement
              for Saville Australia and Saville Ireland to buy the Business and
              the Assets.

 12.2         EMPLOYEES AND CONTRACTORS PERMITTED TO DISCLOSE

              Without limiting the generality of any other provision of this
              Agreement, the
<PAGE>
 
              Vendors will authorise:

              (a)  all present employees, officers, agents, advisers and
                   independent contractors of the Business to disclose to the
                   Purchasers any of the Intellectual Property on or prior to
                   the Completion Date; and

              (b)  any past employee, officer, agent, adviser or independent
                   contractor of the Business to disclose to the Purchasers any
                   of the Intellectual Property, as and when required by the
                   Purchasers.

 13.          RESTRAINT OF TRADE

 13.1         RESTRAINT OF TRADE

              To protect the interests of Saville Australia in the Goodwill,
              each of the Vendors and the Vendors' Guarantors covenants with and
              undertakes to the Purchasers and each of them that none of the
              Vendors, the Vendors' Guarantors or any of their Related Bodies
              Corporate will directly or indirectly:

              (a)

                   (i)   undertake, carry on or be engaged in or concerned with
                         or interested in any business which is directly or
                         indirectly competitive with the Business;
                   (ii)  canvass or solicit any person who or which at any time
                         during the 12 months immediately preceding the
                         Completion Date is or was a client or customer of the
                         Business;
                   (iii) be a lender to or guarantor for any person, firm or
                         company which is engaged in any business referred to in
                         paragraph (i) of this clause 13.1(a) in competition
                         with Saville Australia;
                   (iv)  canvass or solicit any Transferring Employee to leave
                         his employment with Saville Australia;
                   (v)   counsel, procure or otherwise assist any person to do
                         any of the acts referred to in any of the above
                         paragraphs of this clause 13.1(a);

              (b)
                   (i)    on its own account;
                   (ii)   jointly with or on behalf of any other person, firm or
                          company;
                   (iii)  as an employee, manager, director, shareholder, 
<PAGE>
 
                          member, partner, joint venture participant, consultant
                          or in any other capacity;

              (c)
                   (i)    within Queensland;
                   (ii)   within New South Wales;
                   (iii)  within Victoria;
                   (iv)   within Tasmania;
                   (v)    within the Australian Capital Territory;
                   (vi)   within South Australia;
                   (vii)  within Western Australia;
                   (viii) within the Northern Territory;
                   (ix)   Malaysia;
                   (x)    Singapore;
                   (xi)   France;

              (d)
                   (i)    for the period of one year after the Completion Date;
                   (ii)   for the period of one year commencing on the first
                          anniversary of the Completion Date;
                   (iii)  for the period of one year commencing on the second
                          anniversary of the Completion Date;
                   (iv)   for the period of one year commencing on the third
                          anniversary of the Completion Date.

 13.2         NO SHARE ENTITLEMENTS

              To further protect the interests of Saville Australia in the
              goodwill of the Business each of the Vendors and the Vendors'
              Guarantors each covenants with and undertakes to Saville Australia
              that neither of the Vendors nor the Vendors' Guarantors will at
              any time during the periods described in clause 13.1(d) be
              entitled (within the meaning of section 609 of the Corporations
              Law) to shares in any body corporate doing any of the things
              referred to in clause 13.1(a) within any of the territories
              described in clause 13.1(c) other than shares in Saville Ireland
              or no more than 5% of the shares in any listed public company.

 13.3         SEVERANCE

              If any part or any provision or part of a provision of clauses
              13.1 or 13.2 shall be held or found to be void, invalid or
              otherwise unenforceable it shall be deemed to be severed to the
              extent that it is void or to the extent of voidability, invalidity
              or unenforceability but the remainder of that clause shall remain
              in full force and effect.
<PAGE>
 
 13.4         RECEIPT OF LEGAL ADVICE

              Each of the Vendors and the Vendors' Guarantors each warrants that
              it has received independent legal advice with respect to the
              provisions of this clause 131 and considers them to go no further
              than reasonably necessary to protect the Goodwill.

 13.5         CHANGE OF VENDORS' NAMES

              (a)  With effect on and from Completion, each of the Vendors will
                   change its name to such other name as it shall think fit not
                   using the words "BHA" or "BHA Computer" or any colourable
                   imitation thereof.

              (b)  Each of the Vendors undertakes that it will not directly or
                   indirectly attempt to register as a company name, business
                   name or trade mark, the name "BHA" or the name "BHA Computer"
                   or any of the Brand Names or associated devices or logos in
                   any manner or combination whatever in relation to computer
                   software or hardware or telecommunications products or
                   services.

14.           GUARANTEES AND INDEMNITIES

14.1          GUARANTEE OF VENDORS' OBLIGATIONS AND INDEMNITY

              (a)  This Agreement is entered into by each of the Purchasers at
                   the request of the Vendors' Guarantors and upon condition
                   that the Vendors' Guarantors should guarantee to each of the
                   Purchasers the due performance and observance by the Vendors
                   jointly and severally of the terms, covenants and conditions
                   of this Agreement to be observed and performed by the Vendors
                   whether jointly or severally.

              (b)  The Vendors' Guarantors by his execution of this Agreement
                   hereby guarantees to the Purchasers jointly and severally the
                   due performance and observance by the Vendors jointly and
                   severally of each and every of the obligations of each of the
                   Vendors undertaken by each of the Vendors in entering into
                   this Agreement, and without limiting the generality of the
                   foregoing, the due and punctual payment to the Purchasers and
                   each of them of all money due or which may become due from
                   the Vendor hereunder or arising out of any breach by the
                   Vendors or any of them of the terms, covenants, conditions
                   and warranties contained in or implied by this Agreement
                   ("VENDORS' OBLIGATIONS").
<PAGE>
 
              (c)  If the Vendors or any of them defaults or fails to make any
                   such payment, or upon any breach or non-observance of any of
                   the said terms, covenants, conditions and warranties, and
                   notwithstanding that this Agreement may be terminated or
                   liable to termination at the instance of the Purchasers or
                   either of them, the Vendors' Guarantors shall be responsible
                   to the Purchasers and each of them in respect of the Vendors'
                   Obligations in the same manner as if the Vendors' Guarantors
                   was a Vendor or the Vendors under this Agreement.

              (d)  It is further agreed and declared that the provisions of
                   Schedule 10 apply to and are deemed to be incorporated in the
                   guarantee contained in this Agreement.

              (e)  The Vendors' Guarantors hereby covenants and agrees with the
                   Purchasers and each of them to indemnify and keep indemnified
                   the Purchasers and each of them from and against all and any
                   loss, damage, cost, charge or expense or other liability
                   whatsoever and howsoever incurred by the Purchasers or either
                   of them in connection with or in consequence of or arising
                   out of any breach or default or attempted breach or default
                   by the Vendors or any of them of any of the obligations of
                   the Vendors or any of them of the Vendors' Obligations.

              (f)  The Vendors' Guarantors will pay any moneys due to the
                   Purchasers or either of them by reason of this indemnity on
                   demand.

              (g)  The indemnity contained in clause 14 is a separate and
                   distinct and principal obligation of the Vendors' Guarantors
                   and shall not be construed otherwise.

 14.2         GUARANTEE OF SAVILLE AUSTRALIA'S OBLIGATIONS AND INDEMNITY

              (a)
                   (i)    this Agreement is entered into by the Vendors at the
                          request of Saville Ireland and upon condition that
                          Saville Ireland should guarantee to the Vendors the
                          due performance and observance by Saville Australia of
                          the terms, covenants and conditions of this Agreement
                          to be observed and performed by Saville Australia;

                   (ii)   Saville Ireland by his execution of this Agreement 
<PAGE>
 
                          hereby guarantees to the Vendors the due performance
                          and observance by Saville Australia of each and every
                          of the obligations of Saville Australia undertaken by
                          Saville Australia in entering into this Agreement, and
                          without limiting the generality of the foregoing, the
                          due and punctual payment to the Vendors of all money
                          due or which may become due from Saville Australia
                          hereunder or arising out of any breach by Saville
                          Australia of the terms, covenants, conditions and
                          warranties contained in or implied by this Agreement;

                   (iii)  if Saville Australia defaults or fails to make any
                          such payment, or upon any breach or non-observance of
                          any of the said terms, covenants, conditions and
                          warranties, and notwithstanding that this Agreement
                          may be terminated or liable to termination at the
                          instance of the Vendors, Saville Ireland shall be
                          responsible to the Vendors in the same manner as if
                          Saville Ireland was Saville Australia hereunder; and

                   (iv)   it is further agreed and declared that the provisions
                          of clauses 2 and 3 of Schedule 10 shall apply to and
                          be deemed to be incorporated in the guarantee herein
                          contained.

              (b)
                   (i)    Saville Ireland hereby covenants and agrees with the
                          Vendors to indemnify and keep indemnified the Vendors
                          from and against all and any loss, damage, cost,
                          charge or expense or other liability whatsoever and
                          howsoever incurred by the Vendors in connection with
                          or in consequence of or arising out of any breach or
                          default or attempted breach or default by Saville
                          Australia of any of the obligations of Saville
                          Australia under or arising out of this Agreement;

                   (ii)   Saville Ireland will pay any moneys due to the Vendors
                          by reason of this indemnity on demand; and

                   (iii)  the indemnity contained in clause 14.2(b) is a
                          separate and distinct and principal obligation of
                          Saville Ireland and shall not be construed otherwise.
<PAGE>
 
15.           GENERAL

15.1          FURTHER ASSURANCE

              The parties covenant and agree that each will do all acts and
              things and execute all deeds and documents and other writings as
              are from time to time reasonably required for the purposes of or
              to give effect to this Agreement.

15.2          GOVERNING LAW

              This Agreement shall be governed by and construed in accordance
              with the laws of the State and the parties agree to submit to the
              jurisdiction of the Courts in the State.

15.3          WAIVER

              No waiver of any breach of this Agreement shall be held or
              construed to be a waiver of any other subsequent or antecedent
              breach of this Agreement.

15.4          SET-OFF

              Any undisputed amounts due and payable by any party to another
              pursuant to this Agreement may be set-off against any other
              undisputed amount or amounts that may be due and payable on the
              same day to the firstmentioned party by the other provided that
              the firstmentioned party when tendering payment shall accompany
              the same with a statement setting out details of the gross amount
              owing and all individual amounts set-off against the same.

15.5          NOTICES

              All notices, requests, consents and other documents authorised or
              required to be given by or under this Agreement shall be given in
              writing and either personally served or sent by facsimile
              transmission ("FAX") addressed as follows:
<TABLE>
<CAPTION>
 
THE VENDORS
<S>              <C>
TO:               BHA Computer Pty Ltd ACN 068 883 429
ADDRESS:          C/- Dr J Hendry
                  37 Carwoola Street
                  BARDON QLD 4065
FAX NO:
WITH COPIES TO:   Minter Ellison,  Level 22, Waterfront Place, 1 Eagle
                  Street, BRISBANE QLD 4000
                  Attention: WD Thomson
</TABLE> 
<PAGE>
 
                  Fax No:  (07) 3229 1066
 
TO:               BHA PTY LTD ACN 009 937 606
                  C/- Dr J Hendry
                  37 Carwoola Street
                  BARDON QLD 4065

FAX NO:
WITH COPIES TO:   Minter Ellison,  Level 22, Waterfront Place, 1 Eagle
                  Street, BRISBANE QLD 4000
                  Attention: WD Thomson
 
FAX NO:           (07) 3229 1066

<TABLE> 
<CAPTION> 
THE PURCHAERS
<S>              <C> 
TO:               Saville Systems Aust.  Pty Ltd
                  ACN 080 026 551
ADDRESS:          C/- Clayton Utz, 215 Adelaide Street, Brisbane,
                  Queensland
                           Attention: Jeremy Charlston
FAX NO:           (07) 3292 7950
WITH COPIES TO:   Mike Cayer, Saville Systems PLC, 1 Van de Graff
                  Drive,  Burlington Massachusetts 01803, United States
                  of America
                           Fax No:  0015 1 781 270 6503

TO:               Saville Systems PLC
ADDRESS:          C/- Clayton Utz, 215 Adelaide Street, Brisbane,
                  Queensland
                           Attention: Jeremy Charlston
FAX NO:
WITH COPIES TO:   Mike Cayer,  Saville Systems Aust.  Pty Ltd ACN 080
                  026 551, 1 Van de Graff Drive,  Burlington
                  Massachusetts 01803, United States of America
                           Fax No:  0015 1 781 270 6503
</TABLE> 

<TABLE> 
<CAPTION> 

THE VENDORS' GUARANTORS
<S>              <C> 
TO:                        John Edward Hendry
ADDRESS:          37 Carwoola Street, Bardon Brisbane 4065
FAX NO:

TO:                        Prudence Marianne Hendry
ADDRESS:          37 Carwoola Street, Bardon Brisbane 4065
FAX NO:
</TABLE> 
<PAGE>
 
              Notices, requests, consents and other documents ("NOTICES") shall
              be deemed served or given:

              (a)     if personally served by being left at the address of the
                      party to whom the Notice is given between the hours of
                      9.00 am and 5.00 pm on any Business Day, then in such case
                      at the time the Notice is so delivered;

              (b)     if sent by fax, then in such case when successfully
                      transmitted during business hours, or if not during
                      business hours, then when business hours next commence.

              Any party may change its address for receipt of Notices at any
              time by giving notice of such change to the other party. Any
              Notice given under this Agreement may be signed on behalf of any
              party by the duly authorised representative of that party and
              shall be sent to all other parties to this Agreement.

15.6          PUBLIC ANNOUNCEMENTS AND CONFIDENTIALITY

              Each of the parties shall procure that neither it nor any of its
              Related Bodies Corporate shall make any public announcement or
              disclosure to any person in relation to this Agreement or
              information of which it has become aware in connection with this
              Agreement unless it first consults with and obtains the agreement
              in writing of the other parties, which agreement shall not be
              unreasonably withheld, provided however that:

              (a)     no party shall be entitled to withhold agreement in the
                      case of a public announcement or notification where and to
                      the extent that the same is required by law, legal process
                      or stock exchange rule; and

              (b)     a party shall be entitled to make such disclosures to the
                      directors, secretary, professional advisers and bankers of
                      that party and its Related Bodies Corporate so long as the
                      party uses all reasonable endeavours to ensure that the
                      matters disclosed are kept confidential.

15.7          COUNTERPARTS

              This Agreement may be signed in any number of counterparts and all
              such counterparts taken together shall be deemed to constitute one
              and the same document.
<PAGE>
 
15.8          MODIFICATION

              This Agreement may not be modified, amended, added to or otherwise
              varied except by a document in writing signed by each of the
              parties or signed on behalf of each party by a director under
              hand.

15.9          STAMP DUTIES

              The Purchaser shall bear all stamp duties (apart from receipts
              duties, financial institutions duties or bank account debits taxes
              which shall lie between the parties as they fall) assessed on or
              in relation to this Agreement or in connection with any of the
              matters or transactions or sales under this Agreement or in
              pursuance of any document drawn in consequence of this Agreement.

15.10         LEGAL COSTS

              Each party shall bear their own legal costs in relation to this
              Agreement.

15.11         MERGER

              The rights and obligations of the parties in respect of
              agreements, indemnities, covenants and warranties contained herein
              shall be continuing agreements, covenants, indemnities and
              warranties, and accordingly shall not be merged or extinguished by
              or upon Completion or be prejudiced or affected by the acceptance
              by the Purchasers of the Assets pursuant to this Agreement or by
              the payment of the Purchase Price or any part thereof or any other
              moneys payable under this Agreement. Notwithstanding Completion of
              the sale and purchase of the Assets, the provisions of this
              Agreement shall remain in full force and effect as to the
              obligations of the parties respectively remaining to be performed
              after Completion.

15.12         SURVIVAL OF CERTAIN PROVISIONS

              (a)     Clause 15 survives the rescission or termination of this
                      Agreement.

              (b)     If this Agreement is rescinded or terminated, no party is
                      liable to the other parties except in respect of any
                      breach of this Agreement occurring before rescission or
                      termination.

15.13         ENTIRE AGREEMENT

              This Agreement contains the entire understanding of its parties as
              to its
<PAGE>
 
              subject matter and any and all previous understandings or
              agreements on that subject matter cease to have any effect from
              the date of this Agreement.

EXECUTED as a Deed.
<PAGE>
 
                                  SCHEDULE 7.

                                   WARRANTIES


1.   CAPACITY

     (a)  (NECESSARY CORPORATE ACTION BY VENDOR): Each of the Vendors has taken
          all corporate action necessary to authorise it to execute, deliver and
          perform this Agreement and all instruments, documents and agreements
          to be executed and delivered in connection herewith, and to complete
          the transactions contemplated hereby and thereby, and this Agreement
          and all instruments, documents and agreements delivered or to be
          delivered in connection herewith shall upon execution thereof be
          valid, binding and enforceable in accordance with their respective
          terms.

     (b)  (VENDORS DULY INCORPORATED): Each Vendor is duly incorporated and
          validly existing under the laws of Queensland and is authorised and
          qualified to own and operate the Assets and to conduct the Business in
          all jurisdictions where the Assets or Business are owned operated or
          conducted or in which the nature of its business or the ownership or
          leasing of its properties requires such qualification. Each Vendor has
          full power as authority to carry on the business in which it is
          engaged and to own and use the properties owned and used by it.

     (c)  (VENDORS' AND THE VENDORS' GUARANTORS' AUTHORITY): Each Vendor and
          each of the Vendors' Guarantors has the legal right, capacity and full
          power and authority to enter into this Agreement, to perform its
          respective obligations hereunder and each Vendor has the legal rights
          capacity and full power and authority to transfer good and valid title
          to the Assets and the Business to the Purchaser on and subject to the
          terms and conditions of this Agreement.

     (d)  (NO RECEIVER): No receiver or official manager has been appointed of
          the whole or any part of the Assets or undertaking of the Business,
          and no such appointment has been threatened or is envisaged by each of
          the Vendors and no judgment has been obtained nor any execution or
          process of any court or other authority been issued against or been
          levied or enforced upon each of the Vendors partly or wholly in
          respect of the Business or the Assets or any part thereof.

     (e)  (NO LIQUIDATION OR OFFICIAL MANAGEMENT): No Vendor is in liquidation
          or official
<PAGE>
 
          management, and no order, petition, application, proceeding, meeting
          or resolution has been made, presented, brought, called, threatened or
          passed for the purpose of liquidating any Vendor or placing any Vendor
          in official management.

     (f)  (NO INSOLVENCY OR INABILITY TO PAY DEBTS): No Vendor has stopped
          payment to any creditor or is insolvent or unable to pay its debts for
          the purposes of section 460 of the Corporations Law or otherwise, and
          there is no unfulfilled or unsatisfied judgment or court order
          outstanding against the Vendor, and there has been no unreasonable
          delay by the Vendor in any payment of any obligation due for payment.

     (g)  (NO MORTGAGEE IN POSSESSION): No mortgagee is or is entitled to be in
          possession of the whole or any part of the Assets or Business.

     (h)  (NO TRADE PRACTICES ACT INFRINGEMENT): There is no agreement,
          arrangement or activity whether by commission or omission in which any
          Vendor has been or will be concerned which infringes or which has been
          or which is required to be authorised under the Trade Practices Act or
          any other anti-trust legislation in relation to the Assets or the
          Business.

     (i)  (NO CONSENT REQUIRED): No authorisation, approval or consent is
          required in order for the Vendors and the Vendors' Guarantors to enter
          into and perform their respective obligations under and pursuant to
          this Agreement.

     (j)  (NO LEGAL ACTION): No legal action, suit or proceeding judicial or
          administrative, or governmental investigation, is current or pending
          or, to the best of the knowledge, information and belief of the
          Vendors and the Vendors' Guarantors after full inquiry in respect
          thereof has been made by the Vendors and the Vendors' Guarantors,
          threatened against any Vendors or the Vendors' Guarantors which on
          determination would prohibit consummation of this Agreement by the
          Vendors or the Vendors' Guarantors.

     (k)  (EXECUTION WILL NOT RESULT IN BREACH): The execution, performance and
          delivery of this Agreement and all documents executed pursuant hereto
          by the Vendors or the Vendors' Guarantors and the completion of the
          transactions contemplated hereby or thereby do not and will not,
          directly or indirectly, with or without the giving of notice or the
          lapse of time or both:

          (i)    result in the breach of the terms and conditions of or
                 constitute a default under or result in the acceleration of,
                 create in any party the right to accelerate, terminate, modify
                 or cancel, or require any notice, consent or waiver under any
                 agreement or undertaking oral or written or any indenture or
                 instrument by which any Vendor, the Vendors' Guarantors, the
                 Assets or the Business may be affected or bound which
                 consequence would have a
<PAGE>
 
                 material adverse affect on the Assets or the Business; or
          (ii)   violate or be in conflict with or constitute a default under or
                 permit the termination of any provision of or result in the
                 acceleration of or give the right to accelerate the maturity or
                 performance of any obligation of any Vendor or the Vendors'
                 Guarantors which would have a material adverse affect on the
                 Assets or the Business or result in the creation or imposition
                 of any Encumbrance upon any of the Assets or the Business or
                 the Premises under any agreement, undertaking, licence or
                 permit to which any Vendor is a party or by which it or the
                 Assets, the Business or the Premises is or may be bound; or

          (iii)  breach or contravene any order, writ, rule, regulation,
                 injunction or decree of any court, administrative agency or
                 governmental body, or any statute, code, rule or regulation
                 applicable to any Vendor, the Vendors' Guarantors, the Assets
                 or the Business or by which any Vendor or the Vendors'
                 Guarantors may be bound; or

          (iv)   require the filing with, or the obtaining of any permit,
                 consent, approval, authorisation, qualification, acknowledgment
                 or licence of any third party or of any domestic or foreign
                 governmental or regulatory authority or give any domestic or
                 foreign governmental or regulatory authority the right to
                 challenge any of the transactions contemplated by this
                 Agreement; or
          (v)    violate or conflict with or result in a breach of or constitute
                 a default under or result in the imposition of any Encumbrance
                 under the provisions of the Memorandum or Articles of
                 Association of any Vendor or any resolution adopted by the
                 Board of Directors or stockholders of any Vendor.

2.   ACCOUNTS

     (a)  (ACCOUNTS TRUE AND FAIR):

          (i)    The Accounts exhibit a true and fair view of the Business and
                 the Assets for the period to which they relate, and have been
                 prepared in accordance with the requirements of the
                 Corporations Law and the accounting standards of the Australian
                 Society of Accountants and the Institute of Chartered
                 Accountants in Australia, and the trading statements and sales
                 figures forming part of the Accounts are accurate and give a
                 true and fair view of the affairs of the Vendor in respect of
                 the Business and correctly record and reflect the profits and
                 losses of each Vendor respectively as at the date at which such
                 accounts speak and for the period to which such accounts
                 relate; and no material change has taken place since the date
                 of the Most Recent Balance Sheet in the position or
                 profitability of the Vendors or Business as disclosed in the
                 Accounts.

          (ii)   There is no circumstance which would render misleading the
                 value attributed in the Accounts to any of the Assets.
  
          (iii)  The rates of depreciation adopted in the Accounts and for the
                 prior
<PAGE>
 
                 accounting periods (of 12 months each) are in accordance with
                 allowable and applicable taxation rates permitted by the
                 Commissioner of Taxation and are sufficient to ensure that each
                 of the fixed assets of the Business shall be written down to
                 nil by the end of its useful life.

     (b)  (RESERVES AND PROVISIONS PROPER AND ADEQUATE): The Accounts are true,
          complete and accurate in all respects and the reserves and provisions
          made therein for bad and doubtful debts, abandoned, obsolete or
          unusable property or equipment, depreciation on Plant and Equipment,
          and taxation on profits earned up to the end of the period to which
          the Accounts relate were proper and adequate, and the profits
          disclosed in the Accounts are not affected by any unusual or non-
          recurring items other than as set out in the Accounts.

     (c)  (ALL RECORDS PROPERLY KEPT): All records of the Business have been
          fully, properly and accurately kept and completed in accordance with
          proper accounting and business practices and all legal requirements;
          and there are at the date hereof no material inaccuracies or
          discrepancies of any kind contained or reflected in any of them; and
          at the date hereof they give and reflect a true and fair view of the
          financial, contractual and trading position of the Business.

     (d)  (BOOKS OF ACCOUNT KEPT ON PROPER AND CONSISTENT BASIS): The books of
          account and records of the Business have been kept on a proper and
          consistent basis, are up to date, are in the possession of the Vendors
          and contain true, complete and accurate records of the Assets and the
          Business and all matters required to be entered therein by the
          Corporations Law then and from time to time in force.

     (e)  (RELIANCE OF PURCHASER ON ACCOUNTS): The Vendors and the Vendors'
          Guarantors acknowledge that the Purchaser has relied upon inter alia
          the Accounts in entering into this Agreement and except in relation to
          determining the value of the IP Assets, the BHA Goodwill and the BHAC
          Goodwill has relied on the Accounts in determining the Purchase Price
          of the Assets and the Business.

3.   ASSETS

     (a)  (VENDOR'S TITLE TO ASSETS): The Vendor is the legal and beneficial
          owner of and has good and valid title to all of the Assets, and there
          is not any Encumbrance affecting any of the Assets.

     (b)  (TITLE TO PASS TO VENDOR): The Vendors shall on Completion pass to the
          Purchaser absolute full, clear and valid title to all of the Assets
          which shall be free from all Encumbrances on Completion.

     (c)  (CONDITION OF ASSETS): The Assets are in good condition and useable
          for the purpose for which they were acquired by the Vendors and are
          free from material
<PAGE>
 
          defects, subject to the provisions of this Agreement relating to the
          year 2000; and they have been and at the Completion Date they shall
          have been properly maintained in accordance with prudent business
          practice and (where applicable) the manufacturer's recommended
          maintenance procedures.

     (d)  (ALL THE ASSETS OF THE BUSINESS): There exist no properties, assets or
          businesses of any Vendor of any kind or description, tangible or
          intangible, real, personal or mixed and wherever located which are
          held, enjoyed, owned or used by any Vendor in relation to the Business
          other than the Assets.

     (e)  (ALL NECESSARY ASSETS): The Assets are adequate for the conduct of the
          Business as presently conducted and as proposed to be conducted by the
          Vendors as at the Completion Date and constitute all the properties,
          assets and business of any kind or description, tangible or
          intangible, real, personal or mixed, which are appropriate material
          and necessary for the conduct of the Business.

     (f)  (BENEFIT OF ASSET WARRANTIES): The Vendors and the Vendors' Guarantors
          shall ensure that all warranties and guarantees whether of
          manufacturers, wholesalers, retailers, repairers or otherwise existing
          in relation to the Assets other than those that relate to Intellectual
          property are assigned to the Purchasers or that Saville Australia
          receive the benefit thereof.

     (g)  (BENEFIT OF INTELLECTUAL PROPERTY WARRANTIES): The Vendors and the
          Vendors' Guarantors shall ensure that all warranties and guarantees
          whether of manufacturers, wholesalers, retailers or repairers or
          otherwise existing in relation to the Intellectual Property are
          assigned to Saville Ireland or that Saville Ireland receives the
          benefit thereof.

     (h)  (NO LITIGATION): There is no litigation current or pending or to the
          best of the Vendors' information, knowledge and belief threatened
          against the Vendor which might in any way affect any Vendor's title to
          any of the Assets or the Purchasers' title to the Assets after the
          Completion Date.

     (i)  (WARRANTIES): In respect of any goods or services provided, sold or
          supplied by any Vendor relating to the Business during the 12 month
          period prior to and including the Completion Date that the obligations
          on the Vendor under that contract exceed the advantage to be gained by
          the Vendor from that contract.

     (j)  (NO HIRING OF ASSETS): None of the Assets has been or has been agreed
          to be let on hire or hire purchase or sold on deferred terms.

     (k)  (YEAR 2000 COMPLIANCE): Without limiting its other warranties under
          this Agreement or otherwise, each Vendor and the Vendors' Guarantors
          warrants that unless otherwise specified in Schedule 16:
<PAGE>
 
          (i)    neither the performance nor functionality of an Asset is
                 adversely affected with respect to all dates;

          (ii)   prior to Completion, the Vendors have or will specifically
                 design, manufacture, program and integrate all Assets to ensure
                 that the Assets will provide full functionality and operate
                 without adverse effect with respect to all dates; and

          (iii)  prior to Completion the Vendors will specifically and
                 comprehensively test each Asset to ensure that the Asset will
                 provide full functionality and operate without adverse effect
                 with respect to all dates.

          Without limitation, the requirements that the Assets provide full
          functionality and that the functionality and performance not be
          adversely effected with respect to all dates includes:

          (iv)   being able to deal properly with the transaction to 1 January
                 2000;

          (v)    being able to deal properly with leap years, including
                 recognising the year 2000 as a leap year;
          (vi)   being able to deal properly with all calculations based on
                 dates, including calculations such as subtractions, additions,
                 percentages, sequences and comparisons;
          (vii)  being able to deal properly with functions that are programmed
                 to commence or end on a particular date ;
          (viii) date based functionality behaving consistently for dates prior
                 to and after the year 2000;
          (ix)   in all interfaces developed by the Vendors and data storage,
                 the century in any date will be specified either explicitly or
                 by unambiguous algorithms or inferencing rules; and
          (x)    all data involving multiple dates being correctly processed,
                 calculated, sequenced, compared, managed and manipulated where
                 formulas involve dates in on century or in multiple centuries
                 and not:
                 A.   causing any abnormal interruption, termination or
                      degradation in functionality or performance; or
                 B.   resulting in the generation of incorrect values or invalid
                      results.

     (l)  Notwithstanding anything in this Agreement or any Schedule to this
          Agreement to the contrary, the only representation and warranty made
          by the Vendor in respect of the functionality of the IP Assets which
          are computer software is that such computer software has the
          functionality set out in any:
          (i)    operating manual;
          (ii)   on-line documentation;
          (iii)  specifications centred in all BHA Business Records and BHAC
                 Business Records; and
          (iv)   specifications contained in any documentation provided under
                 the Business Contracts.
<PAGE>
 
4.   AUTHORITIES

     (a)  (RENEWAL AND TRANSFER OF AUTHORITIES):

          (i)    The Vendor has all permits, licences, authorities,
                 registrations and approvals ("AUTHORITIES") from any person
                 authority or body necessary for ownership of the Assets and for
                 the proper carrying on of the Business, except for those the
                 absence of which would not have a material adverse effect on
                 the Assets, the Business or the profitability of the Business
                 and has listed these Authorities in Schedule 17;

          (ii)   all such Authorities have been duly obtained on a permanent and
                 unconditional basis and are assignable by the Vendor to the
                 Purchasers without the consent or approval of any party, or if
                 such Authorities are not permanent and/or unconditional, the
                 Vendor possesses all documents necessary to permit the
                 Purchaser to renew or transfer the Authorities; and

          (iii)  such Authorities are and shall be in full force and effect
                 immediately after the completion of the transactions
                 contemplated by this Agreement.

     (b)  (NO REVOCATION OR VARIATION OF AUTHORITIES): To the best of the
          Vendors' knowledge, information and belief, there is no circumstance
          or fact involving the Business which may result in the revocation of
          or variation in any material respect of any of the Authorities held by
          the Vendors in connection with the ownership of the Assets or the
          carrying on of the Business or any part thereof or which would hinder
          or prevent the transfer or grant thereof to the Purchaser.

     (c)  (REPORTS AND RETURNS): All reports, returns and other information
          required to be made or given in respect of any of the Authorities and
          which would have a material adverse effect on the Assets, the Business
          or the profitability of the Business have been duly made or given.

     (d)  (NO FURTHER AUTHORITIES REQUIRED): Continuation of the operation of
          the Business by the Purchaser in substantially the same manner as
          carried on by the Vendors shall not require any other permit, licence,
          authority, registration or approval of any body person or authority
          the absence of which would have a material adverse effect on the
          Assets, the Business or the profitability of the Business.

     (e)  (NO CONTRAVENTION OF AUTHORITIES): There is not and at the Completion
          Date there will not be any subsisting or imminent contravention of any
          of the Authorities obtained by the Vendors in relation to the Business
          which would have a material adverse effect on the Assets, the Business
          or the profitability of the Business.

     (f)  (COMPLIANCE WITH LAWS): The Business is and has, during the 12 months
          period prior to and including the Completion Date, been conducted in
          compliance with all requirements of law whether federal, state or
          local, or other country or place in
<PAGE>
 
          which the Business is conducted and all requirements of all
          governmental bodies or agencies applicable to the Vendor, the
          Business, the Assets and the Premises; and without limiting the
          generality of the foregoing, the use of the Premises for the purpose
          of the Business is permitted under all relevant planning statutes and
          regulations, and there is no contravention of those statutes or
          regulations.

     (g)  (NO BREACH OF STATUTES, REGULATIONS ETC.): The Vendors are not in
          breach or contravention of or default under or non-compliance with any
          statute, rule, regulation or by-law whether Commonwealth, State,
          Municipal or other country or place applicable to the Business or by
          which it may be bound or in which any of the Assets may be located,
          and no Vendor has received notice that it may be in such default
          contravention or breach.

     (h)  (NO LITIGATION FOR NON-COMPLIANCE): There are no actions, suits or
          proceedings pending or, to the best of the Vendors' knowledge,
          information and belief, threatened against any Vendor in any way
          relating to the Business by or before any court or governmental
          authority or agency concerning any non-compliance or alleged non-
          compliance with any regulation or requirements.

     (i)  (NO MATERIALLY ADVERSE PROPOSALS): No Vendor is aware nor should it
          reasonably be aware of any decision or proposal of any person,
          authority or body or any trade union the implementation of which
          whether by force of law or voluntarily may have a material adverse
          effect on the Business or the profitability thereof, or on the Assets.

     (j)  (NO OUTSTANDING NOTICES): There are no orders, notices or requirements
          of any government body or governmental authority or provisions of any
          legislation affecting or relating to or which may affect or relate to
          the Business, the Assets or the Premises which have not been complied
          with.

5.   CLIENTS

     (a)  (SCHEDULE 11): The customers named in Schedule 11 are the only clients
          (and all of the clients) of the Business and the Vendors and the
          Vendors' Guarantors will use its best endeavours to procure that all
          of those customers become and remain customers of the Purchasers after
          Completion.

     (b)  (OBTAIN CUSTOM): The Vendors will give to the Purchasers the benefit
          of the Vendor's custom of the customers named in Schedule 11.

     (c)  (NO INDEMNITY CLAIMS): Other than as disclosed in writing to the
          Purchasers prior to the date hereof, no professional indemnity claims
          other than maintenance and warranty claims under the Business
          Contracts received in the ordinary course of business have been made
          against any Vendor or in respect of the Business and
<PAGE>
 
          nothing has been done or omitted to be done and to the best of the
          Vendors' knowledge, information and belief, no facts or circumstances
          exist which could give rise to any professional indemnity or
          negligence claims against or liabilities in respect of any Vendor or
          the Business.

6.   CONTRACTS

     (a)  (NO CONTRACTS LIABLE TO BE TERMINATED): No Vendor is a party to any
          contractual arrangement which may be terminated by any other party by
          reason of a change in the ownership of the Business, including as a
          result of the transactions contemplated hereby, or by reason of such
          change being subject to the consent of the other party which consent
          has not been obtained the result of which termination would have a
          material adverse affect on the Business or the Assets.

     (b)  (NO DEFAULT): No Vendor is in default under or in violation of any
          provision of its Memorandum and Articles of Association or in material
          breach of any agreement, obligation or arrangement to which it is a
          party or by which it is or may be bound or to which the Business or
          the Assets are subject, nor has any Vendor any knowledge having made
          all due and proper enquiries of the invalidity of or grounds for
          rescission or avoidance or repudiation of any agreement entered into
          by it, and no Vendor has received notice of any intention to terminate
          any such agreement.

     (c)  (NO MATERIAL BREACH OF CONTRACTS): Entry into this Agreement will not
          cause any Vendor to be in breach of any contract or agreement to which
          any Vendor is a party nor will entry into this Agreement constitute
          grounds for termination of any such contract or agreement the result
          of which breach or termination would result in a material adverse
          affect on the Business or the Assets.

     (d)  (CONTRACTS, ARRANGEMENTS, ENGAGEMENTS):

          The Purchaser has received from the Vendors full written disclosure
          prior to the date hereof of details of all contracts agreements or
          arrangements whether written or not having or likely to have a
          material effect on the Business or the carrying on thereof, including,
          without limitation:

          (i)   any written arrangement (or group of related written
                arrangements) for the lease of personal property from or to
                third parties providing for lease payments in excess of $25,000
                per annum;

          (ii)  any written arrangement (or group of related written
                arrangements) for the purchase, sale, supply or manufacture of
                raw materials, commodities, supplies, products or other personal
                property or for the furnishing or receipt of services:
<PAGE>
 
                A.  which calls for performance over a period of more than one
                    year;
                B.  which involves more than the sum of $25,000; or
                C.  in which a Vendor has granted manufacturing rights, "most
                    favoured nation" pricing provisions or marketing or
                    distribution rights relating to any products or territory or
                    has agreed to purchase a minimum quantity of goods or
                    services, agreed to make a minimum payment or has agreed to
                    purchase goods or services exclusively from a certain party;

          (iii) any written arrangement establishing a partnership, joint
                venture or limited liability company;

          (iv)  any written arrangement (or group of related written
                arrangements) under which a Vendor has created, incurred,
                assumed, or guaranteed (or may create, incur, assume, or
                guarantee) indebtedness (including capitalized lease
                obligations) involving more than $25,000 or under which there
                has been imposed (or may be imposed) an Encumbrance on any of
                the Assets, tangible or intangible;

          (v)   any written arrangement concerning confidentiality, assignment
                of inventions, or noncompetition or involving Intellectual
                Property;

          (vi)  any written arrangement involving any Related Bodies Corporate;
                and

          (vii) any written arrangement under which the consequences of a
                default or termination could have a material adverse effect on
                the assets, business, financial condition, results of operations
                or future prospects or the Business or could result in the
                granting to any third party of any rights in or to the Assets.

     (e)  (OFFERS AND TENDERS): There are no offers, tenders or quotations given
          or made by any Vendor in relation to the Assets or the Business still
          capable of giving rise to a contract by the unilateral act of a third
          party other than in the ordinary course of business consistent with
          past custom and practice (including with respect to frequency and
          amount).

     (f)  (NO SUBSTANTIAL CHANGE IN CONTRACTUAL TERMS): During the 12 months
          preceding the date hereof there has been no substantial change in the
          basis or terms upon which any person is prepared to enter into
          contracts or do business with or supply goods or services to the
          Vendors and no such change is or reasonably should be envisaged.

     (g)  (NO DEFAULT BY OTHER PARTIES TO CONTRACTUAL ARRANGEMENTS): To the best
          of the Vendors' knowledge, information and belief, no party with whom
          a Vendor has any contractual arrangement in respect of the Assets or
          the Business is in material
<PAGE>
 
          default without regard to any requirement of notice or grace period,
          or both, in the observance or performance of any term, condition or
          provision of any such contractual arrangement.

     (h)  (NO THIRD PARTY RIGHTS TO TERMINATE CONTRACTS): To the best of the
          Vendors' knowledge, information and belief, no event has occurred or
          in the reasonable opinion of the Vendors is likely to occur which
          would entitle any third party to terminate any contract with or
          benefit enjoyed by any Vendor in respect of the Assets or the
          Business.

     (i)  (REPRESENTATIONS TO THIRD PARTIES TRUE AND CORRECT): Other than in
          respect of Year 2000 representations relating to the CMS version 1 and
          MMS products, which shall be governed by clause 117 of this Agreement,
          all representations made by the Vendors to any party who has a
          contractual arrangement with the Vendor, are true and correct in all
          material respects.

     (j)  (NO CONTRACTS UNABLE TO BE FULFILLED): No Vendor is under any
          obligation or party to any existing contract relating to the Assets or
          the Business which cannot be fulfilled or performed by the Vendor in
          accordance with the conditions of such obligation or contract and
          without undue or unusual expenditure of money or effort including but
          not limited to the payment of liquidated damages.

     (k)  (KNOWLEDGE, INFORMATION AND BELIEF OF THE VENDORS): No customer or
          supplier of the Business has ceased or has indicated an intention to
          cease or reduce trading with the Business and the Vendor has no
          grounds to believe or suspect that after the date hereof or as a
          result of the acquisition of the Business by the Purchaser:

          (i)  suppliers to the Business will cease supplying or may reduce
               supplies to the Purchaser as owner of the Business; or

          (ii)  customers or distributors of the Vendor will terminate any
                contracts, offers or benefits assigned to the Purchaser as owner
                of the Business or cease or reduce trading with the Business.

     (l)  (NO CUSTOMERS AND SUPPLIERS MAY TERMINATE AGREEMENTS): The
          transactions to be effected under this Agreement give no customer or
          supplier of the Business the right to terminate any agreement or
          arrangement with the Vendor the result of which termination would have
          a material adverse affect on the Business or the Assets, and the
          attitude and actions of suppliers, customers and employees and other
          persons with regard to the Vendors shall not be directly or indirectly
          prejudicially affected by this Agreement or Completion.

     (m)  (PARTICULARS OF ALL MATERIAL CONTRACTS): Prior to the date hereof, the
          Vendors have provided the Purchasers with written particulars of all
          the material contracts entered into by each Vendor relating to the
          Assets and the conduct of the
<PAGE>
 
          Business.

     (n)  (ALL CONTRACTS ENFORCEABLE): All contracts of the Vendors in relation
          to the Assets and Business are valid, in full force and effect and
          enforceable in accordance with their respective terms. The Vendors
          have fulfilled or taken all action necessary to fulfil when due all of
          their respective material obligations under such contracts. There has
          not occurred any material default by any Vendor or any event which
          with the lapse of time or at the election of any person other than the
          Vendors shall become a material default under any such contract.

    (o)   (NO ADVERSE CONTRACTUAL ARRANGEMENTS): No Vendor is a party to any
          agreement which will continue in effect after the Completion Date:

          (i)   limiting the freedom of any Vendor or the Purchaser or any of
                their respective officers, employees or agents to engage in or
                to compete in any line of business or with any person or in any
                area;
          (ii)  requiring any Vendor or the Purchaser to share the profits of
                the Business or to pay any royalties relating to the Business or
                to waive or abandon any rights relating to the Business to which
                it is entitled;
          (iii) which is unprofitable or likely to be unprofitable;
          (iv)  which is outside the Vendors ordinary and proper course of
                business;
          (v)   to which a Vendor is a party or in which a Vendor is interested
                whether directly or indirectly which was not negotiated and
                entered into on a totally arm's length basis; or
          (vi)  under which any officer, employee, agent, distributor, supplier
                or independent contractor of the Business or any other person is
                entitled to a commission, remuneration, royalty or payment of
                any nature calculated by reference to the whole or part of the
                turnover profits or sales of the Business.

7.   INSURANCE

     (a)  (ALL INSURABLE ASSETS INSURED): All of the Assets of an insurable
          nature are insured with a company of good repute and financial
          substance in an amount not less than the full cost of replacement
          against fire and all such other risks as are commonly insured against
          by prudent persons carrying on a similar business including without
          limitation third party injury and all other insurances required by law
          and all current premiums on such insurance have been paid and such
          insurance shall be in full force and effect until the Completion Date.

     (b)  (NO FAILURE TO CLAIM): No Vendor has failed to give any notice or
          present any claim with respect to the Assets or the Business under any
          insurance policy.

     (c)  (NO OUTSTANDING REQUIREMENTS OR RECOMMENDATIONS): There are no
          outstanding requirements or recommendations by any insurance company
          that issued a policy
<PAGE>
 
          with respect to any of the Assets or the Business or by any
          governmental authority requiring or recommending any material repairs
          or other work done on or with respect to any of the Premises or the
          Assets, or requiring or recommending any material equipment or
          facilities to be installed on or with respect to any of the Premises
          or the Assets or the Business.

     (d)  No Vendor:

          (i)   is in breach or default with respect to the payment of premiums
                or the giving of notices under any insurance policy;
          (ii)  is in breach or default with respect to any other obligations
                under any such policy, and no event has occurred which, with
                notice or the lapse of time, would constitute such a breach or
                default or permit termination, modification, or acceleration,
                under any such policy; and
          (iii) has received any notice from the insurer disclaiming coverage or
                reserving rights with respect to a particular claim or any such
                policy in general, or amending or cancelling any such policy. No
                Vendor has incurred any loss, damage, expense or liability
                covered by any such insurance policy for which it has not
                properly asserted a claim under the policy.

8.   CLAIMS

     (a)  (NO CLAIMS AGAINST VENDORS):

          (i)   There are no litigation, suits, arbitration, claims, demands or
                proceedings against any Vendor either at law or in equity or
                before or by any governmental agency or arbitrator pending, or
                to the best of the knowledge of the Vendors threatened,
                anticipated or contemplated against or relating to the Assets or
                the Business;
          (ii)  there are no unsatisfied or outstanding judgments, orders,
                decrees or stipulations affecting any Vendor, the Assets, the
                Premises or the Business or to which it is or may become a
                party;
          (iii) to the best of the Vendors' knowledge, information and belief,
                there does not exist nor has there occurred any fact, matter or
                circumstance likely to give rise to any such litigation, suits,
                arbitration, claims, demands or proceedings which could
                materially affect the ability of the Business to continue
                operating;
          (iv)  no Vendor either knows of or has any grounds to know of any
                basis of any such action or of any government investigation
                relating to the Assets the Premises or the Business; and
          (v)   there are no claims against any Vendor pending or threatened; or
                to the knowledge, information or belief of any Vendor having
                made all due and proper enquiries, anticipated or contemplated,
                which if valid would constitute or result in a breach of any
                representation warranty or covenant set forth
<PAGE>
 
                herein.

     (b)  (NO CLAIMS AGAINST THE BUSINESS OR ASSETS): There is no outstanding
          liability or claim against the Business or the Assets nor is there any
          deficiency or defect (other than bona fide warranty claims included in
          Assumed Liabilities) which may result in any claim being made against
          the Business or the Assets in relation to any services provided, sold
          or supplied in the course of the Business, and, without prejudice to
          the generality of the foregoing, no dispute exists between any Vendor
          and any customer or client of the Business nor to the best of the
          Vendors' knowledge, information and belief, is there any circumstance
          which may give rise to any such dispute.

     (c)  (NO GUARANTEES OR WARRANTIES): The Vendors have given no guarantee or
          warranty nor made any representation in respect of services supplied
          or contracted to be supplied by any Vendor save for any guarantee or
          warranty implied by law or in relation to the Business otherwise as
          disclosed in writing to the Purchaser prior to the date hereof.

     (d)  (DISCLOSURE OF EXPENSES OF WARRANTIES): The Vendors have disclosed to
          the Purchasers in writing the aggregate expenses incurred by the
          Vendors in fulfilling its obligations under its guarantee, warranty,
          right of return and indemnity provisions in connection with the
          Business during each of the fiscal years and the interim period
          covered by the Accounts; and no Vendor knows of any reason why such
          expenses should materially increase as a percentage of sales in the
          future.

     (e)  (RECALL OF PRODUCTS): None of the products of the Vendors is subject
          to any recall proceedings and, to the best of the Vendors' knowledge
          and belief, no such proceedings have been threatened. To the best of
          the Vendors' knowledge and belief, there is no basis for the recall,
          withdrawal or suspension of any approval by any domestic or foreign
          governmental authority with respect to any of the products sold or
          proposed to be sold or services provided by the Vendors.

     (f)  (AMOUNT RESERVED FOR WARRANTY CLAIMS): The reserve for warranty claims
          set forth in the Accounts and any reserves for warranty claims created
          by the Vendors in the ordinary course of business subsequent to the
          date of the Most Recent Balance Sheet are adequate.

9.   PREMISES, PREMISES LEASES, BUSINESS CONTRACTS

     (a)  (VENDOR'S POSSESSION): The Vendors enjoy exclusive peaceful and
          undisturbed possession under the Premises Leases.

     (b)  (ALL AGREEMENTS VALID): All Premises Leases and Business Contracts are
          valid subsisting and enforceable in accordance with their terms, and
          the Vendors have
<PAGE>
 
          duly complied with and fulfilled all their respective obligations and
          duties thereunder.

     (c)  (PREMISES): The Premises as at the date hereof:
 
          (i)    comprise all the freehold or leasehold properties owned,
                 leased, used or occupied by the Vendors for the purposes of the
                 Business;
          (ii)   are used for purposes permitted under provisions of all
                 relevant planning or zoning schemes and in compliance with all
                 relevant laws, by-laws and regulations made thereunder;
          (iii)  are not subject to any temporary or conditional planning
                 permission;
          (iv)   are not subject to any restrictive covenant or exception or
                 reservation which adversely affects the ability of the Vendor
                 to carry on the Business thereat;
          (v)    are used only in conformity with all local government building
                 health fire and public utility laws and regulations;
          (vi)   are not affected by any proposals for compulsory acquisition or
                 road widening;
          (vii)  are not otherwise adversely affected;
          (viii) and all its improvements are, having regard to their age, in
                 such condition and state of repair as to be substantially fit
                 for the purpose for which they are presently used.

     (d)  (PERFORMANCE AND OBSERVANCE OF COVENANTS AND RESTRICTIONS): The
          Vendors have performed and observed all covenants, conditions,
          agreements, statutory requirements, orders, regulations and
          restrictions including all appropriate by-laws relating to the
          Premises including all covenants and restrictions contained in the
          Premises Leases.

     (e)  (NOTICES FROM AUTHORITIES): There is no outstanding order or notice
          affecting any of the Premises and there is no proposal of any local or
          other authority or any other circumstance known to the Vendors which
          may result in any such order or notice being made or served or which
          may otherwise affect any of the Premises.

     (f)  (NO TERMINATION OR NOTICE OF TERMINATION): No party has given notice
          to the Vendors of termination or intended termination of any of the
          Premises Leases or the Business Contracts; there are no grounds for
          such termination; and there is no litigation pending or to the best of
          the Vendors' knowledge, information and belief, threatened in
          connection with or arising out of them or any of them, nor has any
          event occurred or any dispute, claim or demand in connection with or
          arising out of them or any of them which may give rise to litigation.

     (g)  (PREMISES SUITABLE): The Premises are suitable for the continued
          conduct of the Business as presently conducted at such premises.
<PAGE>
 
     (h)  (NO SUBSISTING DEFAULT OR BREACH OF PREMISES LEASE): There has not
          been any subsisting default or breach of the provisions of the
          Premises Leases the Vendors have observed and performed all the terms
          and conditions to be observed and performed by them under the Premises
          Leases and the Vendors have not received and failed to comply with any
          notice received in respect of any of the Premises Leases received
          before Completion.

     (i)  The lease or sublease will continue to be legal, valid, binding,
          enforceable and in full force and effect immediately following the
          Completion in accordance with the terms thereof as in effect prior to
          the Completion.

     (j)  No Vendor has assigned, transferred, conveyed, mortgaged, deeded in
          trust or encumbered any interest in the leasehold or subleasehold.

     (k)  All facilities leased or subleased are supplied with utilities and
          other services necessary for the operation of said facilities.

     (l)  No lease imposes any penalty or cost, other than the payment of rent
          at a rate not in excess of the maximum rate payable during the term of
          the lease, for holdover occupancy by the tenant after the term of the
          lease expires.

     (m)  To the best of Vendors' knowledge and belief, the owner of the
          facility leased or subleased has good and clear record and marketable
          title to the parcel of real property, free and clear of any
          Encumbrance, easement, covenant or other restriction except for
          recorded mortgages, easements and covenants and other restrictions
          which do not impair the intended uses or occupancy of the property
          subject thereto by the Vendors.

10.  ENVIRONMENTAL COMPLIANCE

     (a)  (NO ENVIRONMENTAL CONTAMINATION): The Premises are free of all
          environmental contamination including, without limitation, any patent
          or latent environmental contamination of the atmosphere, air, soil,
          sub-soil, ground water or surface waters within or adjacent to such
          premises. There have been no releases of any "Materials of
          Environmental Concern" (as defined below) into the environment at or
          from:

          (i)    any parcel of real property or any facility formerly or
                 currently owned, leased, operated or controlled by the Vendors;
          (ii)   any facility to which a Vendor has delivered products for
                 manufacturing, processing, packaging or distribution; or
          (iiI)  to the Vendors' knowledge, any facility to which waste of a
                 Vendor has been transported for processing, storage or
                 disposal.

           No Vendor is aware of any releases of Materials of Environmental
           Concern at 
<PAGE>
 
          parcels of real property or facilities other than those owned, leased,
          operated or controlled by any Vendor that could reasonably be expected
          to have an impact on such real property or facilities. For purposes of
          this Agreement, "Materials of Environmental Concern" means any
          chemicals, pollutants or contaminants, hazardous substances, solid
          wastes and hazardous wastes, pesticides, toxic materials, oil or
          petroleum and petroleum products or any other material subject to
          regulation under any environmental law.

     (b)  (NO VIOLATION OF ENVIRONMENT LAWS): No hazardous materials and no
          other materials intended for use or generated in the Business have
          been or are used, stored, treated or otherwise disposed of by the
          Vendors in violation of applicable laws and regulations.  The Vendors
          have complied with, and its operations as of the Completion Date are
          in compliance with, all Environmental Laws (as defined below).  For
          purposes of this Agreement, "Environmental Law" means any federal,
          state, regional, county, local or foreign law, statute, rule or
          regulation or the common law relating to the environment or
          occupational health and safety, including without limitation any
          statute, regulation or order pertaining to:

          (i)    treatment, storage, disposal, generation or transportation of
                 commercial, industrial, toxic or hazardous substances or solid
                 or hazardous waste;
          (ii)   air, water or noise pollution;
          (iii)  groundwater or soil contamination;
          (iv)   the release or threatened release into the environment of
                 commercial, industrial, toxic or hazardous substances, or solid
                 or hazardous waste, including without limitation emissions,
                 discharges, injections, spills, escapes or dumping of
                 pollutants, contaminants, pesticides or chemicals;
          (v)    the protection of wildlife, marine sanctuaries or wetlands,
                 including without limitation all endangered or threatened
                 species;
          (vi)   underground and other storage tanks or vessels, and abandoned,
                 disposed or discarded barrels, containers and other
                 receptacles;
          (vii)  health and safety of employees and other persons; and
          (viii) manufacture, processing, use, distribution, treatment, storage,
                 disposal, transportation or handling of pollutants,
                 contaminants, pesticides, chemicals or commercial, industrial,
                 toxic or hazardous substances or oil or petroleum products or
                 solid or hazardous waste.

     (c)  (COMPLIANCE WITH ENVIRONMENTAL LAWS): All hazardous materials removed
          or emitted from the Premises were and are documented, transported and
          disposed of in compliance with all applicable laws and regulations.

     (d)  (NO ENVIRONMENTAL CONTAMINATION RESULTING FROM USE OF PREMISES): No
          materials including, without limitation, effluence leachate, emissions
          or hazardous materials, generated on or emitted from any of the
          Premises have caused or will cause, in whole or in part, any
          environmental contamination.
<PAGE>
 
     (e)  (NO AGREEMENTS RELATING TO ENVIRONMENTAL MATTERS): There is no
          agreement or consent order to which any Vendor is a party in relation
          to any environmental matter and no such agreement or order is
          necessary for the continued compliance of the Business with applicable
          laws and regulations.

     (f)  (NO ORDERS PURSUANT TO ENVIRONMENTAL LAWS): There have been no orders
          issued which have not been fully complied with and cleared,
          investigations conducted or other proceedings taken or to the best of
          the Vendors' knowledge, information and belief, threatened by any
          governmental body or other regulatory authority or threatened in
          writing by any person under or pursuant to any applicable
          environmental laws and regulations with respect to the Business.

     (g)  (NO NOTICES IN RESPECT OF ENVIRONMENTAL MATTERS): No Vendor has
          received any written communications which have not been fully complied
          with and cleared concerning alleged violations of environmental
          legislation or claims with respect to environmental matters with
          respect to the Business.

     (h)  (ALL PERMITS OBTAINED): All permits required under any applicable
          environmental laws and regulations to own and operate the Business
          have been obtained and are in good standing.

     (i)  (BUSINESS DOES NOT CONSTITUTE NUISANCE): The conduct of the Business
          does not constitute a nuisance nor has any claim been made in respect
          of the use or operation of the Premises by any adjoining landowner or
          other party.

11.  INTELLECTUAL PROPERTY

     (a)  (VENDORS OWN ALL INTELLECTUAL PROPERTY): Except as otherwise disclosed
          herein the Vendor owns absolutely the Intellectual Property without
          conflict with or infringement of any, and subject to no Encumbrance,
          right, title or interest in others.

     (b)  (ALL MATERIAL INTELLECTUAL PROPERTY): The Intellectual Property
          specified in Schedule 4 comprises all the intellectual property which
          is material to the conduct of the Business.

     (c)  (NO INTELLECTUAL PROPERTY RIGHTS NOT TO PASS TO PURCHASER): There are
          no intellectual property rights, benefits or arrangements used in or
          relating to the Business which will not effectively pass or be
          licensed to the Purchaser pursuant to this Agreement and each item of
          Intellectual Property will be owned by or available for use by the
          Purchaser on terms and conditions sufficient to enable the Purchasers
          to conduct the Business.

     (d)  (REGISTERED INTELLECTUAL PROPERTY VALIDLY REGISTERED): Where
          registrable in
<PAGE>
 
          Australia, the Intellectual Property is validly registered and
          subsisting in the name of a Vendor and is free of any Encumbrances.

     (e)  (NO DEALINGS PERMITTING USE OF INTELLECTUAL PROPERTY): The Vendors
          have not dealt with, authorised or permitted any person to use any of
          the Intellectual Property, except in the ordinary course of the
          Business and except in respect of the BHAC licence and the Vendors
          have no knowledge of the infringing use of any Intellectual Property
          by any other person.

     (f)  (NO INFRINGEMENT OF OTHER INTELLECTUAL PROPERTY RIGHTS): None of the
          Intellectual Property or the processes now or at any time employed or
          the products now or at any time dealt in by the Business constitutes
          or may constitute an unauthorised infringement of any intellectual
          property rights of any other person and no claims have been asserted
          or are or may be pending or to the best of the Vendors' knowledge,
          information and belief, threatened by any person in respect of the use
          or the validity of the Intellectual Property.

     (g)  (NO CLAIMS AS TO VALIDITY OF BUSINESS CONTRACTS): No claims have been
          asserted or are expected to be asserted by any person to the use of
          any of the Intellectual Property by the Vendors or challenging or
          questioning the validity or effectiveness of any Business Contract
          relating thereto.

     (h)  (NO SIMILAR BUSINESS OR TRADE NAMES OR MARKS): The Vendors have no
          knowledge that and has not received any notice of any claims to the
          effect that any business or trade name or trade mark used or owned by
          the Vendors and used in the Business is the same as or is confusingly
          or deceptively similar to the name of any other company or any
          business or trade name or trade mark owned or used by any other
          person.

     (i)  (NO DEPENDENCE ON LICENSED BUSINESS OR TRADE NAMES OR MARKS): In
          carrying on the Business the Vendors are not dependent upon or using
          any trade marks trade names or business names in respect of which any
          registration in the name of or licence from another party exists or
          has been applied for.

     (j)  (PROTECTION OF INTELLECTUAL PROPERTY): The Vendors have taken or
          caused to be taken all reasonably necessary steps to protect and
          defend the Intellectual Property, and to maintain in confidence all
          trade secrets and confidential information, that the Vendors own or
          use in connection with the Business. No other person or entity has any
          rights to any of the Intellectual Property used in the business, and
          to the best of the Vendors' knowledge, information and belief, no
          other person or entity is infringing, violating or misappropriating
          any of the Intellectual Property used in the Business.

     (k)  (NO ROYALTIES TO THIRD PARTIES): The Vendors do not pay any royalty or
          other 
<PAGE>
 
          payment to any third party or require the permission of or consent of
          any third party in relation to the use of the Intellectual Property.

     (l)  (MORAL RIGHTS): The Purchaser may in respect of any moral rights which
          the Vendors may posses in the Intellectual Property, deal with the
          Intellectual Property in such manner as the Purchaser sees fit,
          including altering the Intellectual Property and using the
          Intellectual Property or any part of it in any way and in any place
          without recognition to the author(s). The Vendors may not enforce any
          moral rights which the Vendors may have or claim in respect of
          Intellectual Property or any part of it, against the Purchaser or any
          other person.

     (m)  (ROYALTIES): As at Completion, there are no outstanding royalties
          payable by the Vendor in respect of any Intellectual Property.

     (n)  (COPYRIGHT SUBSISTS): Copyright in any software or materials related
          to that software which is part of the Intellectual Property, exists
          and is owned either jointly or severally by the Vendors within the
          meaning of the Copyright Act (Cwth) 1968.

     (o)  The Vendors have delivered to the Purchasers correct and complete
          copies of all patents, registrations, applications, licenses and
          agreements (as amended to date) used or to be used in connection with
          the operation of the Business and have made available to the
          Purchasers correct and complete copies of all other written
          documentation evidencing ownership of, rights to use and any claims or
          disputes relating to, each such item. With respect to each such item
          of Intellectual Property that the Vendors own, license or distribute:

          (i)    the Vendors possess all right, title and interest in and to
                 such item;
          (ii)   such item is not subject to any outstanding judgment, order,
                 decree, stipulation or injunction; and
          (iii)  other than in the ordinary course of business, the Vendors have
                 not agreed to indemnify any person or entity for or against any
                 infringement, misappropriation or other conflict with respect
                 to such item.

12.  MATERIAL DISCLOSURE

     (a)  (ALL MATERIAL INFORMATION): All information concerning the Business,
          the Premises and the Assets which the Vendors or any of their
          respective representatives have furnished to the Purchasers or their
          respective representatives prior to the execution hereof is true and
          correct in every material respect, and is not misleading or deceptive,
          and any information known or which should be known to any Vendor or
          the Vendors' Guarantee concerning the Assets, the Business or the
          Premises which might reasonably be supposed to be material to a
          purchaser of the Assets, the Business or the Premises in determining
          whether or not to purchase the
<PAGE>
 
          Assets the Business or the Premises or the price at which or the terms
          upon which a purchaser would be prepared to purchase the Business the
          Premises or any of the Assets has been disclosed to the Purchasers.

     (b)  (ALL INFORMATION TRUE COMPLETE AND ACCURATE): The information set out
          in the letters, documents and communications supplied or conveyed to
          the Purchasers or the Purchasers' respective agents, employees or
          advisers by the Vendors, or any of the Vendors' respective agents,
          employees or advisers, is true, complete and accurate in all material
          respects and the information set out in the Recitals and Schedules to
          this Agreement is true, complete and accurate in all respects.

     (c)  (NO REPRESENTATION CONTAINS MATERIAL ERROR OR MIS-STATEMENT): No
          representation or warranty by any Vendor contained in this Agreement
          and in its Schedules nor any written representation, statement or
          certificate made or furnished or to be made or furnished hereafter by
          such Vendor pursuant hereto in connection with the transactions
          contemplated hereby contains or shall contain any material error or
          mis-statement with respect to the Assets, the Premises or the
          Business.

     (d)  (NO REPRESENTATION OR WARRANTY OMITS MATERIAL FACT): No representation
          or warranty of the Vendors contained in this Agreement and in its
          Schedules omits or will omit to state any material fact with respect
          to the Assets, the Business, the Premises or the Vendors necessary to
          make any such representation or warranty, in the light of the
          circumstances in which it is made, misleading.

     (e)  (NO ADVERSE ACTS): Prior to the date hereof, nothing has been or shall
          be done or omitted to be done in relation to the carrying on of the
          Business or the Assets which might materially adversely affect the
          interests of the Purchaser as an intending purchaser of the Business
          or the Assets.

     (f)  (MATERIAL FACTS AND MATTERS): To the best of the knowledge and belief
          of the Vendors there is no:

          (i)  fact or matter material to the value of the Assets hereby agreed
               to be sold materially affecting the aggregate value of the Assets
               which has not been disclosed to the Purchasers; or

          (ii) fact or matter materially affecting the trading of the Business
               and the continued operation of the Business as a going concern
               and which has not been disclosed to the Purchasers.

13.  EMPLOYEES

     (a)  (EMPLOYEES' PARTICULARS): The particulars of the Employees contained
          in the list supplied by the Vendors to the Purchasers under clause 8.1
          of this Agreement are 
<PAGE>
 
          true and correct and comprise all Employees engaged in employment by
          the Vendor.

     (b)  (ALL MATERIAL TERMS OF EMPLOYMENT): The Vendors have disclosed to the
          Purchaser prior to the date hereof all material terms and conditions
          on which each of the Employees is employed, including a description of
          all benefits received by any Employee, and warrants that there are no
          service contracts or agreements in existence in relation to any of the
          Employees which cannot be terminated on one month's notice or less
          without the payment of any compensation; and the engagement of all
          Employees is on the basis that the Vendor has no obligation to pay an
          Employee any commission bonus incentive, retiring or similar payment
          other than as disclosed herein. The Vendors have disclosed to the
          Purchasers prior to the date hereof each:

          (i)  agreement with any Employee or director of the Vendors:
               A.   the benefits of which are contingent, or the terms of which
                    are materially altered, upon the occurrence of a transaction
                    involving a Vendor of the nature of any of the transactions
                    contemplated by this Agreement;
               B.   providing any term of employment or compensation guarantee;
                    or
               C.   providing severance benefits or other benefits after the
                    termination of employment of such employee or director; and

          (ii) agreement, plan or arrangement, including without limitation any
               stock option plan, stock appreciation right plan, restricted
               stock plan, stock purchase plan, severance benefit plan, or any
               other employee benefit plan, any of the benefits of which will be
               increased, or the vesting of the benefits of which will be
               accelerated, by the occurrence of any of the transactions
               contemplated by this Agreement or the value of any of the
               benefits of which will be calculated on the basis of any of the
               transactions contemplated by this Agreement.

     (c)  (TRANSFER OF EMPLOYEES): No Vendor has any knowledge of any facts
          which would indicate that any Employees shall not transfer their
          employment to the Purchaser on the Completion Date.

     (d)  (NO VIOLATION OF EMPLOYMENT LAWS): No Vendor has violated any
          applicable law or regulation relating to employment of labour
          including without limitation Occupational Health and Safety
          legislation, Equal Opportunity legislation and all other laws or
          regulations relating to labour relations, labour standards or
          employment practices and any regulations thereunder or engaged in any
          conduct with respect to the Employees which will or may result in any
          liability to any Vendor or any Purchaser.
<PAGE>
 
     (e)  (TAXES PAID FROM EMPLOYEES' WAGES): The Vendor has made timely
          payments of any taxes required to be deducted and withheld from the
          wages and salaries paid to the Employees and the Vendors have paid all
          Employees in accordance with all applicable awards, legislation or
          agreements whether registered or otherwise.

     (f)  (CLAIMS BY EMPLOYEES): Other than as previously disclosed in writing
          by the Vendors to the Purchasers, the Vendors do not know of any facts
          which will result in any present or former employee of the Vendor
          having any valid claim on the date of termination of his employment as
          contemplated herein, against any Vendor or the Business whether under
          law or any employment agreement or otherwise on account of or for:

          (i)    overtime pay;
          (ii)   wages or salaries;
          (iii)  any statute, ordinance, regulation or award relating to minimum
                 wages or other working conditions;
          (iv)   redundancy pay or payment in lieu of notice;
          (v)    workers' compensation claims or common law claims for injury or
                 any kind of disease;
          (vi)   sick leave;
          (vii)  superannuation;
          (viii) termination of employment;
          (ix)   discrimination or sexual harassment.

     (g)  (NO LABOUR DISPUTE): At the date of this Agreement there is no labour
          dispute, strike, work stoppage or arbitration proceedings which will
          affect or may affect the Business or interfere with its continued
          operation.

     (h)  (NO ENTERPRISE AGREEMENT OR AGREEMENT WITH UNIONS): Other than as
          disclosed herein there is no enterprise agreement or agreement,
          arrangement or understanding between any Vendor and any trade union or
          any representatives thereof in respect of the Employees.

     (i)  (NO RETIREMENT OR PENSION SCHEME): No Vendor has entered into any
          retirement benefit schemes, pension schemes, other pension
          arrangements or other benefit payable on retirement, death or
          disability or on the attainment of a specified or agreed number of
          years service, and no Vendor has undertaken to make any ex gratia
          payment of any such nature whether legally enforceable or not,
          relating to the Employees.

     (j)  (EMPLOYEES PERMIT TO DISCLOSE): On the Completion Date the Vendors
          will authorise all past and present employees of the Business to
          disclose to the Purchasers any of the Intellectual Property.
<PAGE>
 
14.  SUPERANNUATION

     (a)  The Vendors shall deliver to the Purchaser if requested in the
          possession or control of the Vendors the correct and complete copies
          of all documents, information and other material relating to any
          complying superannuation fund for the purposes of the Superannuation
          Industry (Supervision) Act of which any relevant Transferring Employee
          is a member and details of contributions made by any Vendor to such
          fund(s) and such other information as a Purchaser may reasonably
          require to satisfy itself to the extent and nature of any
          superannuation arrangements existing in respect of Transferring
          Employees as at the Completion Date.

     (b)  There are no pending or threatened claims by or on behalf of any
          Employee or beneficiary of such Employee in respect of any
          superannuation fund of which such Employee is or was a member alleging
          a breach of fiduciary duty or violation of other applicable law which
          could result in any liability on the part of a Vendor or a Purchaser.

     (c)  All and any claims in respect of superannuation and superannuation
          entitlements against the Vendors have been disclosed to the Purchasers
          in writing.

     (d)  The Vendors have provided the prescribed minimum level of
          superannuation support in respect of each of their Employees and in
          particular for each of the Transferring Employees and there is no
          liability whether actual or contingent to any superannuation guarantee
          charge in terms of the Superannuation Guarantee Charge Act and/or the
          Superannuation Guarantee (Administration) Act for which a Vendor
          and/or a Purchaser may be liable.

     (e)  Without limiting the generality of any other warranty herein
          contained, the Vendors warrant with and covenant to the Purchaser that
          each of them has complied with all and any obligations imposed upon
          them whether under statute, by contract or otherwise in relation to
          superannuation matters and that a Purchaser shall not suffer any loss
          or damage in relation to such matters occurring on or before the
          Completion Date in respect of any relevant Transferring Employee.

     (f)  None of the Vendors currently are party to any superannuation
          arrangement under which a Purchaser may become liable to make
          superannuation contributions in respect of any Transferring Employee.

     (g)  The Purchasers shall not be obliged to make any contributions to any
          such superannuation arrangement in respect of any Employee of the
          Vendors and in particular in respect of any Transferring Employee.
<PAGE>
 
15.  STAMP DUTIES

     All documents which are necessary to establish the title of the Vendors to
     the Assets and any rights and benefits under any Premises Leases are in the
     possession of or under the control of the Vendors and to the extent that
     such documents attract stamp duty in Australia or elsewhere they have been
     or will on the Completion Date be properly stamped.

16.  ATTORNEYS AND FINDERS FEE

     (a)  (NO POWERS OF ATTORNEY): There are no powers of attorney given by any
          Vendor which are or may come to be in force in relation to the
          Business or the Assets.

     (b)  (NO FINDERS FEE): No Vendor has taken any action such that anyone
          becomes entitled to receive from the Purchaser any finders fee,
          brokerage or other commission in connection with the acquisition of
          the Assets and the sale and purchase of the Business under the terms
          and conditions of this Agreement.

17.  CARRY ON BUSINESS

     (a)  (BENEFIT OF GOODWILL): The Vendors shall use their best endeavours to
          secure for the Purchaser the full benefit of the interest and custom
          of the Vendors in respect of the Business and shall preserve and
          maintain the Goodwill.

     (b)  (INTRODUCE CUSTOMERS AND SUPPLIERS): The Vendors shall use their best
          endeavours to introduce customers and suppliers of the Business to the
          Purchasers to facilitate the transfer of the Business to the
          Purchasers.

     (c)  (CONTINUED SERVICE OF EMPLOYEES): The Vendors shall use their best
          endeavours to co-operate with the Purchasers in order to secure for
          the Purchaser the continued services of the Employees.

18.  NO TAX DISPUTE

     There is no material dispute or difference between the Vendor and the
     Commissioner of Taxation of the Commonwealth of Australia or any other
     Federal State or Municipal body or authority or taxation or revenue
     authority of any other country or place that may in any way affect the
     Purchasers or the transactions contemplated by this Agreement.

19.  SYSTEMS

     (a)  (SYSTEMS INDEPENDENT): The Systems used in respect of the Business by
          the
<PAGE>
 
          Vendors are independent of the Vendors, are discrete systems capable
          of functioning without any recourse to any Systems operated by the
          Vendors, and represent all of the systems necessary or useful for the
          successful operation of the Business.

     (b)  (SYSTEMS IN GOOD ORDER): The Systems owned, developed and operated by
          the Vendors in respect of the Business are in good working order and
          repair, are free from any material design or operational problems that
          would prevent the Purchaser from adequately utilising such systems in
          the conduct of the Business, can be run, managed and obliged without
          undue reliance on persons other than the Employees, and are properly
          documented in a form that permits the utilisation of such systems
          without resort to records not kept by the Vendors.

20.  ABSENCE OF CHANGES

     There has not been since the date of the Accounts:

     (a)  any material adverse change to the Assets or to the financial
          circumstances or condition of the Vendors or the Business and the
          financial prospects cash flow and trading pattern of the Business, and
          having made all due and proper enquiries, the Vendors are not aware of
          any fact or event which will or is likely to cause any such material
          adverse change prior to or after the Completion Date;

     (b)  any damage destruction or casualty loss, whether covered by insurance
          or not, materially and adversely affecting the Assets or the Business;

     (c)  any entry into any agreement commitment or transaction by the Vendor
          material to the Business or the Assets, except agreements commitments
          or transactions in the ordinary course of business consistent with
          past custom and practice (including with respect to frequency and
          amount);

     (d)  any change in the method of depreciation of the Plant and Equipment;

     (e)  any acquisition, sale transfer or other disposition of the Assets or
          any other assets other than in the ordinary course of business
          consistent with past custom and practice (including with respect to
          frequency and amount); or

     (f)  any material change in the remuneration or other benefits paid to or
          expected by the Employees.

     No Vendor has, since the date of the Most Recent Balance Sheet, taken any
     of the following actions:

     (a)  created, incurred or assumed any debt (including obligations in
          respect of capital 
<PAGE>
 
          leases);

     (b)  changed its accounting methods, principles or practices, or made any
          new elections with respect to taxes affecting the Assets or any
          changes in current elections with respect to taxes affecting the
          Assets;

     (c)  paid any obligation or liability other than in the ordinary course of
          business consistent with past custom and practice (including with
          respect to frequency and amount);

     (d)  mortgaged or pledged any property or assets or subjected any assets to
          any Encumbrance;

     (e)  sold, assigned, transferred, licensed or sublicensed any Intellectual
          Property, other than in the ordinary course of business consistent
          with past custom and practice (including with respect to frequency and
          amount);

     (f)  entered into, amended, terminated, taken or omitted to take any action
          that would constitute a violation of or default under, or waived any
          rights under, any material contract or agreement;

     (g)  entered into any written arrangement (including written agreements)
          which creates a liability on a Vendor's part in excess of $10,000;

     (h)  made or committed to make any capital expenditure in excess of $10,000
          per item or total capital expenditures in excess of $50,000 in the
          aggregate;

     (i)  failed to take any action necessary to preserve the validity of any
          Intellectual Property or Permit; or

     (j)  agreed in writing or otherwise to take any of the foregoing actions.

21.  TRUST

     No Vendor is the trustee of any trust or holds any of the Assets or
     conducts the Business in that capacity.

22.  BANKING FACILITIES

     The Vendors have, prior to the date hereof, disclosed to the Purchasers in
     writing a true, correct and complete list of:

     (a)  each bank, savings and loan or similar financial institution at which
          the Vendors with respect to the Business has an account, safety
          deposit box, line of credit or
<PAGE>
 
          credit facility and the numbers of the accounts or safety
          deposit boxes maintained by the Vendors with respect to the Business
          thereat and details, including terms, of any line of credit or credit
          facility; and

     (b)  the names of all persons authorized to draw on each such account or to
          have access to any such safety deposit box facility, together with a
          description of the authority (and conditions thereof, if any) of each
          such person with respect thereto.
<PAGE>
 
THE COMMON SEAL of BHA PTY LTD                   )
ACN 009 937 606 was affixed by the authority of  ) .............................
the Board of Directors in the presence of:       ) (Signature of Director)
                                                 )
 
 .......................................            .............................
(Signature of a Secretary/Director)                (Name of Director in Full)
 
 
 ....................................... 
(Name of Secretary/Director in Full)


THE COMMON SEAL of BHA COMPUTER                  )
PTY LTD ACN 068 883 429 was affixed by the       ) .............................
authority of the Board of Directors in the       ) (Signature of Director)
presence of:                                     )
 
 
 
 .......................................            .............................
(Signature of a Secretary/Director)                (Name of Director in Full)
 
 

 ....................................... 
(Name of Secretary/Director in Full)

THE COMMON SEAL of SAVILLE SYSTEMS AUST.         )
PTY LTD  ACN 080 026 551 was affixed by the      ) .............................
authority of the Board of Directors in the       ) (Signature of Director)
presence of:                                     )
 
 
 
 .......................................            .............................
(Signature of a Secretary/Director)                (Name of Director in Full)
 
 
 ....................................... 
(Name of Secretary/Director in Full)

SAVILLE SYSTEMS PLC by JOHN J BOYLE              )
<PAGE>
 
III, President and Chief Executive Officer in the)  ............................
 presence of:                                    )  (Signature of President and 
                                                 )  Chief Executive Officer)

 ...................................(Signature of
 Witness)
 
 ...................................(Name of
 Witness in Full)



SIGNED SEALED AND DELIVERED by                   )
JOHN EDWARD HENDRY in the presence of:           )  ............................
                                                 )  (Signature)
 
 .................................. 
(Signature of Witness)


 ..................................
(Name of Witness in Full)

SIGNED SEALED AND DELIVERED by                   )
PRUDENCE MARIANNE HENDRY in the                  ) .............................
presence of:                                     ) (Signature)
 
 
 ..................................
(Signature of Witness)


 ..................................
(Name of Witness in Full)

<PAGE>
                                                                    EXHIBIT 10.1
 
                            SHARE PURCHASE AGREEMENT
                            ------------------------

     This Agreement dated as of April 3, 1998 is entered into by and among
Saville Systems PLC, a public limited company incorporated in the Republic of
Ireland (the "Company"), and BHA Pty. Ltd. ACN 009 937 606, a company
incorporated in Queensland, Australia (the "Purchaser").

     WHEREAS, the Company, Saville Systems Aust. Pty. Ltd. ACN 080 026 551, a
company incorporated in Queensland, Australia and a wholly-owned subsidiary of
the Company ("Saville Australia"), BHA Computer Pty. Ltd. ACN 068 883 429, a
company incorporated in Queensland, Australia and the Purchaser are entering
into a Business Acquisition Agreement on the date hereof (the "Acquisition
Agreement"), pursuant to which the Company and Saville Australia will acquire
the Business (as defined in the Acquisition Agreement); and

     WHEREAS, as a condition to the completion of the transactions contemplated
by the Acquisition Agreement, the Company is required to sell, and the Purchaser
is required to purchase, Ordinary Shares, $0.0025 nominal value per share, of
the Company (the "Ordinary Shares") on the terms set forth herein.

     NOW THEREFORE, in consideration of the mutual promises and covenants
contained in this Agreement, the Company and the Purchaser agree as follows:

      1.  Authorization and Sale of Shares.
          -------------------------------- 

          1.1  Authorization.  The Company has, or before the Closing (as 
               -------------                                             
defined in Section 2) will have, duly authorized the sale and issuance, pursuant
to the terms of this Agreement, of 283,698 Ordinary Shares ranking equally with
the other Ordinary Shares of the Company.

          1.2  Sale of Shares.  Subject to the terms and conditions of this
               --------------                                              
Agreement, at the Closing the Company will sell and issue to the Purchaser, and
the Purchaser will purchase, 283,698 Ordinary Shares for the purchase price of
US$49.5126 per share (equal to the average closing sale price of the Company's
American Depositary Receipts ("ADRs") on the Nasdaq National Market for the five
trading days preceding April 2, 1998).  The Ordinary Shares being sold under
this Agreement are referred to as the "Shares."

      2.  The Closing.  The closing ("Closing") of the sale and purchase of the
          -----------                                                          
Shares under this Agreement shall take place at the offices of Clayton Utz, 125
Adelaide Street, Brisbane, Queensland, Australia at 2:00 p.m. (local time) on
April 3, 1998.  At the Closing, the Company shall deliver to the Purchaser a
facsimile copy of the certificate for the number of Shares being purchased by
the Purchaser, registered
<PAGE>
 
in the name of the Purchaser, against payment to the Company of the purchase
price therefor, by wire transfer, check, or other method acceptable to the
Company. In addition, at the Closing, the Company shall deliver by facsimile a
certification of the Company's registrar and transfer agent certifying as to the
truth and accuracy of such facsimile share certificate. The Company has
instructed its registrar and transfer agent to deliver by facsimile a copy of
the register for the Ordinary Shares which lists the Purchaser as the owner of
the Shares to the Purchaser. Such facsimiles shall be sent c/o Minter Ellison
(facsimile # 61 7 3229 1066), Attn: W. D. Thompson. The date of the Closing is
hereinafter referred to as the "Closing Date."

      3.  Representations and Warranties of the Company.
          --------------------------------------------- 

          3.1  Organization and Good Standing. The Company is a corporation duly
               ------------------------------                         
organized, validly existing and in good standing as a public limited company
under the laws of the Republic of Ireland.

          3.2  Issuance of Shares. The issuance, sale and delivery of the Shares
               ------------------
in accordance with this Agreement have been duly authorized by all necessary
corporate action on the part of the Company, and all such Shares have been duly
reserved for issuance. The Shares when so issued, sold and delivered against
payment therefor in accordance with the provisions of this Agreement will be
duly and validly issued, fully paid and non-assessable, will have no personal
liability attaching to the ownership thereof and will be free and clear of
liens, charges, restrictions, claims and encumbrances imposed by or through the
Company. Assuming the accuracy of the represenations and warranties of the
Purchaser in Section 4 hereof, the issuance of the Shares to the Purchaser
pursuant to this Agreement is (i) exempt from registration under the U.S.
Securities Act of 1933, as amended (the "Securities Act") and (ii) will not give
rise to a public offer within the meaning of the Companies Act (Ireland), 1963
to 1990.
 
          3.3  American Depositary Receipts. The issuance and delivery of the
               ----------------------------
ADRs against the Shares in accordance with the provisions of the Deposit
Agreement (the "Deposit Agreement") between the Company and The Bank of New
York, as Depositary, (the "Depositary") have been duly authorized by all
necessary corporate action on the part of the Company, and all such ADRs have
been duly reserved for issuance. Other than the procedures set forth in the
Deposit Agreement, no consent, approval, order or authorization of any third
party is required for the deposit of the Shares by the Purchaser with the
Depositary. Upon the issuance by the Depositary of the ADRs against the Shares,
such ADRs will be duly and validly issued, and the holder of such ADRs will be
entitled to the rights specified therein and in the Deposit Agreement.

                                      -2-
<PAGE>
 
      4.  Representations and Warranties of the Purchaser.  The Purchaser
          -----------------------------------------------                
represents and warrants to the Company and agrees with the Company as follows:

          4.1  The Purchaser has full power and authority to enter into and to
perform this Agreement in accordance with its terms.  The Purchaser has not been
organized, reorganized or recapitalized specifically for the purpose of
acquiring the Shares.

          4.2  The Purchaser has received a copy of a Confidential Offering
Memorandum dated March 27, 1998 from the Company (the "Offering Memorandum").
The Purchaser acknowledges that no federal or state agency has made any finding
or determination as to the fairness of the terms of this offering. The Shares
have not been recommended or endorsed by any federal, state or foreign
securities commission or regulatory agency nor have any of the foregoing
authorities confirmed the accuracy or determined the adequacy of the Offering
Memorandum.

          4.3  The Purchaser is acquiring the Shares for its own account, for
investment and not with a view to the distribution thereof within the meaning of
the Securities Act.

          4.4  The Purchaser agrees that the Company may place a legend on the
certificates delivered hereunder in substantially the following form:

          "These Shares have not been registered under the Securities Act of
          1933, as amended (the 'Securities Act') and may not be offered or
          transferred by sale, assignment, pledge or otherwise prior to the end
          of the restricted period specified in Regulation S of the Securities
          Act, in the United States or to a US person unless the Shares are
          registered under the Securities Act, or an exemption from the
          registration requirements of the Securities Act is available.  Terms
          used herein that are defined in Regulation S of the Securities Act are
          used herein as defined therein."

          4.5  The Purchaser is not a U.S. person (as defined in Securities Act
Rule 902(k)) and is not acquiring the Shares for the account or benefit of any
U.S. person.

          4.6  The Purchaser will resell the Shares only in accordance with (A)
the provisions of Regulation S promulgated under the Securities Act, (B)
pursuant to an effective registration statement under the Securities Act, or (C)
pursuant to an available exemption from registration under the Securities Act.

          4.7  Other than pursuant to an effective registration statement under
the Securities Act, the Purchaser will not offer or sell the Shares to a U.S.
person or to

                                      -3-
<PAGE>
 
or for the account or benefit of a U.S. person prior to the expiration of the
applicable period under Regulation S under the Securities Act.

          4.8  The Purchaser was represented and advised by counsel in
connection with the purchase of the Shares and the execution of this Agreement
by the Purchaser.

     5.   Conditions to Closing.
          --------------------- 

          5.1  The obligation of the Company and the Purchaser to consummate the
transactions contemplated by this Agreement is subject to the execution of the
Acquisition Agreement and the completion by each of them of the transactions
contemplated thereby.

          5.2  The obligation of the Company to consummate the transactions
contemplated by this Agreement is subject to the further condition that the
representations and warranties of the Purchaser set forth in Section 4 hereof
shall be true and correct on and as of the Closing Date.

     6.   Registration Rights.
          ------------------- 

          6.1  Registration of Shares.  The Company shall file with the United
               ----------------------                                         
States Securities and Exchange Commission (the "SEC") within 15 days following
the Closing, a registration statement on Form S-3 covering the resale to the
public by the Purchaser of the Shares (the "Registration Statement").  The
Company shall use its best efforts to cause the Registration Statement to be
declared effective by the SEC as soon as possible.  The Company shall cause the
Registration Statement to remain effective for a period of 24 months after the
Closing or until such earlier time as the Shares then subject to the
Registration Statement are freely tradeable pursuant to Rule 144 under the
Securities Act without regard to volume limitations or are otherwise freely
tradable pursuant to Rule 144(k) under the Securities Act.
 
          6.2  Limitations on Registration Rights.
               ---------------------------------- 

          (a) The Company may delay filing the Registration Statement with the
SEC in the event that the Company is engaged in or plans to engage in a public
offering of its securities, acquisition or any other activity that the Company
in good faith determines might be adversely affected by the filing of the
Registration Statement; provided such right to delay a filing may not be
                        --------                                        
exercised more than once in any 12 month period and any such delay shall be for
not more than 180 days.  In addition, the Company may, by written notice to the
Purchaser, suspend the Registration Statement and require that the Purchaser
immediately cease sales of Shares pursuant to the Registration Statement, in any
period during which the Company is engaged in any activity or transaction or
preparations or negotiations for

                                      -4-
<PAGE>
 
any activity or transaction ("Company Activity") that the Company desires to
keep confidential for business reasons, if the Company determines in good faith
that the public disclosure requirements imposed on the Company under the
Securities Act in connection with the Registration Statement would require
disclosure of the Company Activity. To the Company's knowledge, none of the
events referred to in the first clause of this Section 6.2(a) is occurring as of
the date of this Agreement.

          (b) If the Company suspends the Registration Statement or requires the
Purchaser to cease sales of Shares pursuant to paragraph (a) above, the Company
shall, as promptly as practicable following the termination of the circumstance
which entitled the Company to do so, take such actions as may be necessary to
reinstate the effectiveness of the Registration Statement and/or give written
notice to the Purchaser authorizing them to resume sales pursuant to the
Registration Statement.  If the prospectus included in the Registration
Statement has been amended to comply with the requirements of the Securities
Act, the Company shall enclose such revised prospectus with the notice to the
Purchaser given pursuant to this paragraph (b), and the Purchaser shall make no
offers or sales of Shares pursuant to the Registration Statement other than by
means of such revised prospectus.

          6.3  Registration Procedures.
               ----------------------- 

          (a) In connection with the filing by the Company  of the Registration
Statement, the Company shall furnish to the Purchaser a reasonable number of
copies of the prospectus, including a preliminary prospectus, in conformity with
the requirements of the Securities Act.

          (b) The Company shall use its best efforts to register or qualify the
Shares covered by the Registration Statement under the securities laws of such
states of the United States as the Purchaser shall reasonably request; provided,
                                                                       -------- 
however, that the Company shall not be required in connection with this
- -------                                                                
paragraph (b) to qualify as a foreign corporation or execute a general consent
to service of process in any jurisdiction.

          (c) If the Company has delivered preliminary or final prospectuses to
the Purchaser and after having done so the prospectus is amended to comply with
the requirements of the Securities Act, the Company shall promptly notify the
Purchaser and, if requested by the Company, the Purchaser shall immediately
cease making offers or sales of shares under the Registration Statement and
return all prospectuses to the Company.  The Company shall promptly provide the
Purchaser with revised prospectuses and, following receipt of the revised
prospectuses, the Purchaser shall be free to resume making offers and sales
under the Registration Statement.

                                      -5-
<PAGE>
 
          (d) The Company shall pay all expenses incurred by the Company in
complying with this Section 6 including, without limitation, all registration
and filing fees, exchange listing fees, printing expenses, fees and expenses of
counsel for the Company, United States state securities laws fees and expenses,
and the expense of any special audits incident to or required by any such
registration, but excluding underwriting discounts, selling commissions and the
fees and expenses of the Purchaser's own counsel (if any).

          6.4  Requirements of Purchaser.  The Company shall not be required to
               -------------------------                                       
include any Shares in the Registration Statement unless:

          (a) the Purchaser furnishes to the Company in writing such information
regarding the Purchaser, the contemplated distribution of the Shares held by the
Purchaser and such other information regarding the proposed sale of Shares by
the Purchaser as the Company may reasonably request in writing in connection
with such Registration Statement or as shall be required in connection therewith
by the SEC or any state securities law authorities;

          (b) the Purchaser shall have provided to the Company its written
agreement:

              (i) to indemnify the Company and each of its directors and
officers against, and hold the Company and each of its directors and officers
harmless from, any losses, claims, damages, expenses or liabilities (including
reasonable attorneys fees) to which the Company or such directors and officers
may become subject by reason of any statement or omission in the Registration
Statement made in reliance upon, or in conformity with, a written statement by
such Purchaser furnished pursuant to this Section 6.4; and

              (ii) to report to the Company sales made pursuant to the
Registration Statement.

          6.5  Indemnification.  The Company agrees to indemnify and hold
               ---------------                                           
harmless the Purchaser against any losses, claims, damages, expenses or
liabilities to which the Purchaser may become subject by reason of any untrue
statement of a material fact contained in the Registration Statement or any
preliminary or final prospectus or any omission to state therein a fact required
to be stated therein or necessary to make the statements therein not misleading,
except insofar as such losses, claims, damages, expenses or liabilities arise
out of or are based upon information furnished to the Company by or on behalf of
the Purchaser for use in the Registration Statement.  The Company shall have the
right to assume and control the defense and settlement of any claim or suit for
which the Company may be responsible for indemnification under this Section 6.5.

                                      -6-
<PAGE>
 
          6.6  Assignment of Rights.  The Purchaser may not assign any of its
               --------------------                                          
rights under this Section 6.

      7.       Additional Covenants of the Company.
               ----------------------------------- 

          7.1  Listing of the Shares. Promptly after the Closing, and in any
               ---------------------                               
event prior to the deposit of such Shares by the Purchaser with the Depositary,
the Company will file an application to list the ADRs representing the Shares on
the Nasdaq National Market. The Company does not know of any reason why the ADRs
will not be approved for listing on the Nasdaq National Market. The Company
shall pay all expenses incurred by the Company in complying with this Section
7.1.

          7.2  Stamp Duties. The Company shall pay all stamp duties, levies or
               ------------
taxes assessed by or in the Republic of Ireland required to be paid by the
Purchaser in connection with the issuance of the Shares.

      8.  Miscellaneous.
          ------------- 

          8.1  Notices.  All notices, requests, consents, and other
               -------                                             
communications under this Agreement shall be in writing and shall be delivered
by hand or mailed by first class certified or registered mail, return receipt
requested, postage prepaid:

     If to the Company, at Saville Systems PLC, One Van de Graaff Drive,
Burlington, Massachusetts  01803, USA, Attention:  Michael Cayer, Esq., or at
such other address or addresses as may have been furnished in writing by the
Company to the Purchaser;

     If to the Purchaser, at its address set forth on Schedule I, or at such
                                                      ----------            
other address or addresses as may have been furnished to the Company in writing
by the Purchaser.

     Notices provided in accordance with this Section 6.5 shall be deemed
delivered upon personal delivery or three business days after deposit with a
reputable international express delivery service.

          8.2  Brokers.  Each of the Company and the Purchaser (i) represents
               -------                                                       
and warrants to the other party hereto that it has retained no finder or broker
in connection with the transactions contemplated by this Agreement, and (ii)
will indemnify and save the other party harmless from and against any and all
claims, liabilities or obligations with respect to brokerage or finders' fees or
commissions, or consulting fees in connection with the transactions contemplated
by this Agreement asserted by any person on the basis of any statement or
representation alleged to have been made by such indemnifying party.

                                      -7-
<PAGE>
 
          8.3  Entire Agreement.  This Agreement embodies the entire agreement
               ----------------                                               
and understanding between the parties hereto with respect to the subject matter
hereof and supersedes all prior agreements and understandings relating to such
subject matter.

          8.4  Amendments and Waivers.  Except as otherwise expressly set forth
               ----------------------                                          
in this Agreement, any term of this Agreement may be amended and the observance
of any term of this Agreement may be waived (either generally or in a particular
instance and either retroactively or prospectively), with the written consent of
the Company and the Purchaser.  Any amendment or waiver effected in accordance
with this Section 8.4 shall be binding upon each holder of any Shares, each
future holder of all such securities and the Company.  No waivers of or
exceptions to any term, condition or provision of this Agreement, in any one or
more instances, shall be deemed to be, or construed as, a further or continuing
waiver of any such term, condition or provision.

          8.5  Counterparts.  This Agreement may be executed in one or more
               ------------                                                
counterparts, each of which shall be deemed to be an original, but all of which
shall be one and the same document.

          6.6  Section Headings.  The section headings are for the convenience
               ----------------                                               
of the parties and in no way alter, modify, amend, limit, or restrict the
contractual obligations of the parties.

          8.7  Severability.  The invalidity or unenforceability of any
               ------------                                            
provision of this Agreement shall not affect the validity or enforceability of
any other provision of this Agreement.

          8.8  Governing Law.  This Agreement shall be governed by and construed
               -------------                                                    
in accordance with the laws of the State of Delaware, USA.

                                      -8-
<PAGE>
 
     IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of
the date first written above.


                              COMPANY

                              SAVILLE SYSTEMS PLC

 
                              By: /s/ John J. Boyle, III
                                  ----------------------    
                                    John J. Boyle, III,
                                    President and Chief
                                    Executive Officer



                              PURCHASER

                              BHA PTY. LTD.

 
                              By: /s/ John Edward Hendry
                                  ----------------------    
                                    Chairman

                                      -9-


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