WALSH INTERNATIONAL INC \DE\
8-K, 1998-04-02
COMPUTER PROGRAMMING SERVICES
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                       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) March 23, 1998

                            WALSH INTERNATIONAL INC.
               (Exact Name of Registrant as Specified in Charter)

         Delaware                       0-28202                   51-0309207
(State or Other Jurisdiction          (Commission             (I.R.S. Employer

      of Incorporation)               File Number)           Identification No.)

105 Terry Drive, Suite 118, Newtown, Pennsylvania                  18940
    (Address of Principal Executive Offices)                    (Zip Code)

Registrant's telephone number, including area code  (215)860-4949

- --------------------------------------------------------------------------------
          (Former Name or Former Address, if Changed Since Last Report)

<PAGE>

Item 5.  Other Events.

     On March 23, 1998, the registrant, Walsh International Inc. (the "Company")
entered into an  Agreement  and Plan of Merger (the  "Merger  Agreement")  among
Cognizant  Corporation  ("Cognizant"),  WAC Inc., a  wholly-owned  subsidiary of
Cognizant ("Acquisition Sub") and the Company. Upon the terms and subject to the
conditions  contained in the Merger Agreement,  Acquisition Sub shall merge with
and into the Company with the Company surviving as a wholly-owned  subsidiary of
Cognizant (the "Merger"). Pursuant to the Merger Agreement, each share of common
stock,  $.01 par value,  of the  Company  ("Company  Common  Stock")  issued and
outstanding at the effective time of the Merger (the "Effective  Time") shall be
converted as discussed below.

      On January 15, 1998,  Cognizant announced a planned spin-off  distribution
(the  "Cognizant  Distribution")  that  will  result  in the  reorganization  of
Cognizant into two separate publicly traded companies:  IMS Health  Incorporated
("IMS") and Nielsen Media  Research,  Inc. If the Effective Time occurs prior to
the record date for the Cognizant Distribution then each share of Company Common
Stock issued and  outstanding  at the Effective  Time will be converted into the
right to receive a fraction of a share of  Cognizant's  common  stock,  $.01 par
value ("Cognizant Common Stock"). If the Effective Time occurs subsequent to the
record date for the  Cognizant  Distribution  then each share of Company  Common
Stock issued and  outstanding  at the Effective  Time will be converted into the
right to receive a fraction  of a share of IMS's  common  stock,  $.01 par value
("IMS Common Stock").  The exchange ratio  applicable to Cognizant  Common Stock
will be  determined  by  reference to the average of the closing sale prices per
share  of  Cognizant  Common  Stock  on the New York  Stock  Exchange  Composite
Transactions  Tape  on  each  of the 15  consecutive  trading  days  immediately
preceding the second trading day prior to the Effective Time. The exchange ratio
applicable  to the IMS  Common  Stock will be  determined  by  reference  to the
average of the closing sale prices per share of IMS Common Stock on the New York
Stock Exchange Composite Transactions Tape on each of the 10 consecutive trading
days  immediately  preceding the second trading day prior to the Effective Time.
If the  Effective  Time had occurred on the date of the Merger  Agreement,  each
share of  Company  Common  Stock  would  have been  converted  into the right to
receive a fraction of a share of Cognizant  Common Stock valued at $15.75 (based
on an average closing sale price for Cognizant Common Stock of $51.792).

     Concurrently with the execution of the Merger  Agreement,  the Company also
entered  into a Stock  Option  Agreement  (the "Stock  Option  Agreement")  with
Cognizant  pursuant  to which the  Company  granted  to  Cognizant  an option to
purchase up to an aggregate

                                       2

<PAGE>

2,111,815  shares of Company  Common  Stock at $15.75  per share.  The option is
exercisable  only  in  the  event  the  Merger  Agreement  is  terminated  under
circumstances  in which Cognizant  becomes entitled to receive a termination fee
from the Company.  In addition,  under certain  circumstances,  the Stock Option
Agreement  entitles  Cognizant to require the Company to  repurchase  the option
and/or any shares obtained through exercise of the option. The maximum amount of
compensation  the Company is required to pay  Cognizant  under the Stock  Option
Agreement together with any termination fees and expense  reimbursement is $5.55
million.

     In connection with its approval of the Merger and the Merger Agreement, the
Board of Directors of the Company amended the Rights Agreement of the Company to
the effect that none of the Merger,  the Merger  Agreement  or the Stock  Option
Agreement  will cause the Rights  issued  under the Rights  Agreement  to become
exercisable.

     The Merger is subject to the approval of the  stockholders  of the Company,
and to certain other  conditions.  The Merger  Agreement  (without  schedules or
exhibits) is attached hereto as Exhibit 2.1.

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

(c)  Exhibits.

Number             Description
- ------             -----------

  2.1              Agreement  and Plan of  Merger,  dated as of March 23,  1998,
                   among Cognizant Corporation, WAC Inc. and Walsh International
                   Inc.

  2.2              Stock Option Agreement, dated as of March 23, 1998, by and
                   between Walsh International Inc. and Cognizant Corporation.

 99.1              Press Release dated March 23, 1998.

 99.2              Press Release dated March 23, 1998.


                                       3

<PAGE>

                                   SIGNATURES

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

                                            WALSH INTERNATIONAL INC.

                                            By: /s/ MARTYN WILLIAMS

                                                --------------------------------
                                                Name: Martyn Williams
                                                Title: Chief Financial Officer

Date:  April 1, 1998

                                       4

<PAGE>

                                INDEX TO EXHIBITS

Exhibit       Description                                           

  2.1         Agreement and Plan of Merger dated as of March 23,
              1998 among Cognizant Corporation, WAC Inc. and
              Walsh International Inc.

  2.2         Stock Option Agreement, dated as of March 23, 1998,
              by and between Walsh International Inc. and
              Cognizant Corporation.

 99.1         Press Release dated March 23, 1998.

 99.2         Press Release dated March 23, 1998.



                                                                     EXHIBIT 2.1

================================================================================


                          AGREEMENT AND PLAN OF MERGER

                           Dated as of March 23, 1998

                                      Among

                             Cognizant Corporation,

                                    WAC Inc.

                                       And

                            Walsh International Inc.

================================================================================



<PAGE>

                                TABLE OF CONTENTS

                                                                            Page

                                                                            ----

                                    ARTICLE I

                                    The Merger .............................   2

SECTION 1.01. The Merger ...................................................   2

SECTION 1.02. Closing ......................................................   2

SECTION 1.03. Effective Time of the Merger .................................   2

SECTION 1.04. Effects of the Merger ........................................   2

SECTION 1.05. Certificate of Incorporation; By-Laws ........................   2

SECTION 1.06. Directors ....................................................   3

SECTION 1.07. Officers .....................................................   3

                                   ARTICLE II

                Effect of the Merger on the Capital Stock of the
                   Constituent Corporations.................................   3

SECTION 2.01. Effect on Capital Stock ......................................   3

SECTION 2.02. Exchange of Certificates .....................................   4

SECTION 2.03. Treatment of Options .........................................   6

SECTION 2.04. Treatment of Debt Securities and Warrants ....................   7

                                   ARTICLE III

                         Representations and Warranties ....................   8

SECTION 3.01. Representations and Warranties of the Company ................   8

SECTION 3.02. Representations and Warranties of Parent and Sub. ............  23


                                       -i-

<PAGE>

                                                                            Page

                                                                            ----

                                   ARTICLE IV

           Covenants Relating to Conduct of Business Prior to Merger ......   28

SECTION 4.01. Conduct of Business .........................................   28

                                    ARTICLE V

                             Additional Agreements ........................   33

SECTION 5.01. Preparation of Form S-4 and Proxy Statement;

          Stockholder Meeting .............................................   33

SECTION 5.02. Access to Information; Confidentiality ......................   34

SECTION 5.03. Reasonable Efforts ..........................................   34

SECTION 5.04. Indemnification .............................................   34

SECTION 5.05. Public Announcements ........................................   36

SECTION 5.06. No Solicitation .............................................   36

SECTION 5.07. Benefit Matters .............................................   37

SECTION 5.08. Stock Exchange Listing ......................................   38

SECTION 5.09. Letters of the Company's Accountants ........................   38

SECTION 5.10. Letters of Parent's Accountants .............................   38

SECTION 5.11. Takeover Statute ............................................   38

                                   ARTICLE VI

                             Conditions Precedent .........................   38

SECTION 6.01. Conditions to Obligations of Each Party to Effect the Merger.   38

SECTION 6.02. Additional Conditions to Obligations of Parent and Sub. .....   39

SECTION 6.03. Additional Conditions to Obligations of the Company .........   40


                                      -ii-

<PAGE>

                                                                            Page

                                                                            ----


                                                    ARTICLE VII

                       Termination, Amendment and Waiver ..................   41

SECTION 7.01. Termination .................................................   41

SECTION 7.02. Effect of Termination .......................................   42

SECTION 7.03. Amendment ...................................................   42

SECTION 7.04. Extension; Waiver ...........................................   42

SECTION 7.05. Procedure for Termination, Amendment, Extension or Waiver ...   43

                                  ARTICLE VIII

                              General Provisions ..........................   43

SECTION 8.01. Nonsurvival of Representations and Warranties ...............   43

SECTION 8.02. Fees and Expenses ...........................................   43

SECTION 8.03. Notices .....................................................   44

SECTION 8.04. Definitions .................................................   45

SECTION 8.05. Interpretation ..............................................   49

SECTION 8.06. Counterparts ................................................   49

SECTION 8.07. Entire Agreement; No Third-Party Beneficiaries ..............   49

SECTION 8.08. GOVERNING LAW ...............................................   49

SECTION 8.09. Assignment ..................................................   50

SECTION 8.10. Enforcement .................................................   50



                                      -iii-

<PAGE>

SCHEDULES

Company Disclosure Schedule
Parent Disclosure Schedule

EXHIBITS

Exhibit A    Form of Amended and Restated Certificate of Incorporation of the

             Company

Exhibit B    Form of Stock Option Agreement
Exhibit C    Parent Exchange Ratios
Exhibit D    IMS Representations
Exhibit E    IMS Exchange Ratio
Exhibit F    IMS Exchange Ratio

                                      -iv-

<PAGE>

     AGREEMENT AND PLAN OF MERGER,  dated as of March 23, 1998,  among Cognizant
Corporation, a Delaware corporation ("Parent"), WAC Inc., a Delaware corporation
and a direct wholly owned subsidiary of Parent ("Sub"),  and Walsh International
Inc., a Delaware corporation (the "Company").

     WHEREAS,  the respective Boards of Directors of Parent, Sub and the 31 upon
the terms and subject to the  conditions set forth in this  Agreement,  would be
fair and in the best interests of their respective stockholders;

     WHEREAS,  such Boards of Directors  have  approved the Merger,  pursuant to
which each share of common stock,  par value $.01 per share, of the Company (the
"Company  Common  Stock",  which term also  refers to and  includes,  unless the
context otherwise  requires,  the associated Rights, as defined in Section 8.04)
issued and outstanding immediately prior to the Effective Time of the Merger (as
defined in Section 1.03),  other than shares owned,  directly or indirectly,  by
the Company or any  subsidiary (as defined in Section 8.04) of the Company or by
Parent,  Sub or any  subsidiary of Parent,  will be converted  into the right to
receive the Merger Consideration (as defined in Section 2.01(c));

     WHEREAS, the Merger and this Agreement require the vote of the holders of a
majority of the outstanding  shares of the Company Common Stock for the approval
thereof (the "Company Stockholder Approval");

     WHEREAS, concurrently with the execution and delivery of this Agreement and
as a condition of Parent's willingness to enter into this Agreement,  Parent and
the Company are  entering  into a stock option  agreement,  dated as of the date
hereof, in the Form of Exhibit A hereto (the "Stock Option Agreement"), pursuant
to which the Company is granting  Parent an option to purchase shares of Company
Common Stock;

     WHEREAS,   Parent,   Sub   and  the   Company   desire   to  make   certain
representations,  warranties,  covenants and  agreements in connection  with the
Merger and also to prescribe various conditions to the Merger; and

     WHEREAS,  for federal  income tax purposes,  it is intended that the Merger
shall qualify as a reorganization  under the provisions of Section 368(a) of the
Internal Revenue Code of 1986, as amended (the "Code");

     NOW,  THEREFORE,  in  consideration  of  the  representations,  warranties,
covenants  and  agreements  contained  in this  Agreement  and the Stock  Option
Agreement, the parties agree as follows:

<PAGE>

                                                                               2

                                    ARTICLE I

                                   The Merger

     SECTION 1.01. The Merger.  Upon the terms and subject to the conditions set
forth in this Agreement, and in accordance with the Delaware General Corporation
Law (the "DGCL"), Sub shall be merged with and into the Company at the Effective
Time of the Merger. At the Effective Time of the Merger,  the separate existence
of Sub shall cease, and the Company shall continue as the surviving corporation.

     SECTION 1.02. Closing. Unless this Agreement shall have been terminated and
the  transactions  herein  contemplated  shall have been  abandoned  pursuant to
Section 7.01,  and subject to the  satisfaction  or waiver of the conditions set
forth in Article VI, the closing of the Merger (the  "Closing")  will take place
at 10:00 a.m. on the first business day after satisfaction of the conditions set
forth  in  Section  6.01  (or  as  soon  as  practicable   thereafter  following
satisfaction  or waiver of the  conditions  set forth in Sections 6.02 and 6.03)
(the  "Closing  Date"),  at the  offices  of  Simpson  Thacher &  Bartlett,  425
Lexington Avenue,  New York, New York 10017,  unless another date, time or place
is agreed to in writing by the parties hereto. Notwithstanding the foregoing, in
the event  that the  Closing  Date  otherwise  would  occur  during  the  period
beginning  on  the  record  date  (the  "Distribution   Record  Date")  for  the
determination  of holders of common stock,  par value $0.01 per share, of Parent
("Parent  Common Stock")  entitled to receive shares of common stock,  par value
$0.01 per share ("IMS Common Stock" and,  together with the Parent Common Stock,
the "Merger Stock"), of IMS Health Incorporated, a Delaware corporation ("IMS"),
in the  proposed  dividend  of IMS Common  Stock to Parent's  stockholders  (the
"Parent  Transaction")  and ending on the date that is 17 trading days following
the date of commencement of "regular way" trading in the IMS Common Stock on the
New York Stock Exchange ("NYSE"), the Closing Date shall be deferred to the date
that is 18 trading days  following  the date of  commencement  of "regular  way"
trading in the IMS Common Stock on the NYSE.

     SECTION 1.03.  Effective Time of the Merger. Upon the Closing,  the parties
shall file with the Secretary of State of the State of Delaware a certificate of
merger (the  "Certificate  of Merger")  executed in accordance with the relevant
provisions of the DGCL and shall make all other  filings or recordings  required
under the DGCL.  The Merger shall  become  effective at such time on the Closing
Date as the  Certificate  of Merger is duly filed with the Secretary of State of
the  State  of  Delaware,  or at  such  other  time  on the  Closing  Date as is
permissible  in accordance  with the DGCL and as Sub and the Company shall agree
should be specified in the  Certificate  of Merger (the time the Merger  becomes
effective being the "Effective Time of the Merger").

     SECTION 1.04.  Effects of the Merger. The Merger shall have the effects set
forth in the  applicable  provisions  of the DGCL.  As used  herein,  "Surviving
Corporation"  shall mean and refer to the  Company,  at and after the  Effective
Time of the Merger, as the surviving corporation in the Merger.

<PAGE>

                                                                               3

     SECTION 1.05.  Certificate of Incorporation;  By-Laws. (a) At the Effective
Time of the Merger, and without any further action on the part of the Company or
Sub,  the  certificate  of  incorporation  of the  Company  shall be amended and
restated in the form  attached  hereto as Exhibit A (the  "Amended  and Restated
Company  Charter"),  which  Amended and Restated  Company  Charter  shall be the
certificate  of  incorporation  of the Surviving  Corporation  until  thereafter
amended as provided therein or by applicable law.

     (b) At the Effective Time of the Merger,  and without any further action on
the part of the  Company or Sub,  the  by-laws  of Sub as in effect  immediately
prior to the Effective  Time of the Merger shall be the by-laws of the Surviving
Corporation  at the  Effective  Time of the Merger until  thereafter  changed or
amended as provided therein or by applicable law.

     SECTION  1.06.  Directors.  The directors of Sub  immediately  prior to the
Effective Time of the Merger shall be the directors of the Surviving Corporation
at the Effective Time of the Merger,  until the earlier of their  resignation or
removal or until their respective successors are duly elected and qualified,  as
the case may be.

     SECTION  1.07.  Officers.  The  officers  of Sub  immediately  prior to the
Effective Time of the Merger shall be the officers of the Surviving  Corporation
at the Effective Time of the Merger,  until the earlier of their  resignation or
removal or until their  respective  successors are duly elected or appointed and
qualified, as the case may be.

                                   ARTICLE II

                Effect of the Merger on the Capital Stock of the

                            Constituent Corporations

     SECTION 2.01.  Effect on Capital  Stock.  As of the  Effective  Time of the
Merger,  by virtue  of the  Merger  and  without  any  action on the part of the
Company,  Sub or any holder of any shares of Company  Common Stock or any shares
of capital stock of Sub:

     (a)  Common  Stock of Sub.  Each  share of common  stock of Sub  issued and
outstanding  immediately  prior to the  Effective  Time of the  Merger  shall be
converted  into one share of common  stock,  par value  $.01 per  share,  of the
Surviving Corporation.

     (b) Cancellation of Treasury Stock and  Parent-Owned  Company Common Stock.
Each share of Company  Common  Stock that is owned by the Company and each share
of Company Common Stock that is owned by Parent,  Sub or any other subsidiary of
Parent shall  automatically  be cancelled  and retired and shall cease to exist,
and no  cash,  Merger  Stock  or  other  consideration  shall  be  delivered  or
deliverable in exchange therefor.

     (c) Conversion of Company Common Stock.  Subject to Section  2.02(e),  each
issued  and  outstanding  share of  Company  Common  Stock  (other  than  shares
cancelled  pursuant to Section  2.01(b))  shall be  converted  into:  (i) if the
Effective  Time of the Merger  occurs prior to the  Distribution  Record Date, a
fraction of a share of Parent Common Stock equal to the Parent

<PAGE>

                                                                               4

Exchange Ratio (as defined in Section  8.04);  and (ii) if the Effective Time of
the Merger occurs after the  Distribution  Record Date, a fraction of a share of
IMS Common Stock equal to the IMS Exchange  Ratio (as defined in Section  8.04).
The amount of Merger Stock into which each such share of Company Common Stock is
converted is referred to herein as the "Merger Consideration".

     (d)  Cancellation  and  Retirement  of  Company  Common  Stock.  As of  the
Effective  Time of the  Merger,  all  shares  of  Company  Common  Stock and the
associated Rights issued and outstanding immediately prior to the Effective Time
of the  Merger  shall no  longer  be  outstanding  and  shall  automatically  be
cancelled and retired and shall cease to exist, and each holder of a certificate
representing  any  such  shares  of  Company  Common  Stock  (collectively,  the
"Certificates")  shall, to the extent such  Certificate  represents such shares,
cease to have any rights with respect  thereto,  except the right to receive the
Merger  Consideration  (and cash in lieu of  fractional  shares) to be issued or
paid in consideration  therefor upon surrender of such certificate in accordance
with Section 2.02.

     SECTION  2.02.  Exchange of  Certificates.  (a) Exchange  Agent.  As of the
Effective  Time of the Merger,  Parent shall enter into an  agreement  with such
bank or trust  company as may be  designated  by Parent (the  "Exchange  Agent")
which shall provide that Parent shall  deposit,  or cause to be deposited,  with
the Exchange Agent, for the benefit of holders of the Certificates, for exchange
in  accordance  with this Article II,  certificates  representing  the shares of
Merger  Stock (such  shares of Merger  Stock,  together  with any  dividends  or
distributions  with respect thereto with a record date on or after the Effective
Time of the Merger  and any cash  payable  in lieu of any  fractional  shares of
Parent  Common Stock,  being  hereinafter  referred to as the "Exchange  Fund"),
issuable pursuant to Section 2.01 in exchange for outstanding  shares of Company
Common Stock.

     (b)  Exchange  Procedures.  As soon as  reasonably  practicable  after  the
Effective  Time of the Merger,  the Exchange  Agent shall mail to each holder of
record of  Certificates  immediately  prior to the Effective  Time of the Merger
whose  shares were  converted  into shares of Merger  Stock  pursuant to Section
2.01,  (i) a letter of  transmittal  (which shall specify that delivery shall be
effected,  and risk of loss and title to the Certificates  shall pass, only upon
delivery of the  Certificates to the Exchange Agent,  and which shall be in such
form and have such other  provisions as Parent may reasonably  specify) and (ii)
instructions  for use in effecting the surrender of the Certificates in exchange
for  certificates  representing  shares of Merger  Stock.  Upon  surrender  of a
Certificate for  cancellation to the Exchange Agent together with such letter of
transmittal,  duly executed, the holder of such Certificate shall be entitled to
receive in exchange  therefor a  certificate  representing  that number of whole
shares of Merger  Stock which such holder has the right to receive in respect of
the Certificate surrendered pursuant to the provisions of this Article II (after
taking into account all shares of Company Common Stock then held by such holder)
and cash in lieu of any  fractional  shares of Merger Stock as  contemplated  by
Section  2.02(e),   and  the  Certificate  so  surrendered  shall  forthwith  be
cancelled.  In the event of a transfer of ownership of shares of Company  Common
Stock  which  is not  registered  in the  transfer  records  of the  Company,  a
certificate  representing  the  proper  number of shares of Merger  Stock may be
issued to a transferee if the  Certificate  is presented to the Exchange  Agent,
accompanied  by all documents  required to evidence and effect such transfer and
by evidence that

<PAGE>

                                       5

any  applicable  stock  transfer  taxes have been  paid.  Until  surrendered  as
contemplated by this Section 2.02, each Certificate  shall be deemed at any time
after the Effective  Time of the Merger to represent  only the Merger Stock into
which the shares of Company Common Stock  represented by such  Certificate  have
been converted as provided in this Article II and the right to receive upon such
surrender cash in lieu of any fractional  shares of Merger Stock as contemplated
by this Section 2.02.

     (c) Distributions with Respect to Unexchanged Shares. No dividends or other
distributions  with  respect to Merger  Stock with a record date on or after the
Effective  Time of the Merger  shall be paid to the holder of any  unsurrendered
Certificate with respect to the shares of Merger Stock represented  thereby, and
no cash  payment in lieu of  fractional  shares shall be paid to any such holder
pursuant  to  Section  2.02(e),  in  each  case  until  the  surrender  of  such
Certificate  in  accordance  with this  Article  II.  Subject  to the  effect of
applicable laws, following surrender of any such Certificate there also shall be
paid to the holder of the Certificate  representing whole shares of Merger Stock
issued in exchange  therefor without interest (i) at the time of such surrender,
the amount of any cash payable in lieu of a fractional  share of Merger Stock to
which such holder is entitled  pursuant to Section 2.02(e) and the amount of any
dividends or other  distributions  with a record date on or after the  Effective
Time of the Merger  theretofore  paid (but withheld  pursuant to the immediately
preceding  sentence) with respect to such whole shares of Merger Stock, and (ii)
at  the  appropriate  payment  date,  the  amount  of  any  dividends  or  other
distributions  with a record date on or after the  Effective  Time of the Merger
but prior to such  surrender  and a payment date  subsequent  to such  surrender
payable with respect to such whole shares of Merger Stock.

     (d) No Further  Ownership  Rights in Company  Common  Stock.  All shares of
Merger  Stock  issued  upon  conversion  of shares of  Company  Common  Stock in
accordance with the terms hereof, and all cash paid pursuant to Sections 2.02(c)
and  2.02(e),  shall be deemed to have been issued in full  satisfaction  of all
rights pertaining to such shares of Company Common Stock (including with respect
to the Rights),  and there shall be no further  registration of transfers on the
stock  transfer  books of the  Surviving  Corporation  of the  shares of Company
Common Stock which were  outstanding  prior to the Effective Time of the Merger.
If, after the Effective  Time of the Merger,  Certificates  are presented to the
Surviving  Corporation for any reason,  they shall be cancelled and exchanged as
provided in this Article II.

     (e)  No  Fractional  Shares.  (i) No  certificates  or  scrip  representing
fractional  shares  of  Merger  Stock  shall be issued  upon the  surrender  for
exchange of  Certificates,  and such fractional share interests will not entitle
the owner thereof to vote or to any rights of a stockholder  of Parent.  In lieu
of such  issuance  of  fractional  shares,  Parent  shall  pay  each  holder  of
Certificates an amount in cash equal to the product  obtained by multiplying (a)
the  fractional  share  interest to which such holder (after taking into account
all shares of Company Common Stock held immediately  prior to the Effective Time
of the Merger by such holder) would  otherwise be entitled by (b) the average of
the  closing  sale  prices  for a share of  Merger  Stock on the NYSE  Composite
Transaction Tape for the five trading days  immediately  preceding the Effective
Time of the Merger.

<PAGE>

                                                                               6

     (ii) As soon as practicable  after the determination of the amount of cash,
if any, to be paid to holders of  Certificates  with  respect to any  fractional
share  interests,  the Exchange  Agent shall make available such amounts to such
holders of Certificates,  subject to and in accordance with the terms of Section
2.02(c).

     (f)  Termination  of  Exchange  Fund.  Any  portion  of the  Exchange  Fund
deposited  with the Exchange  Agent  pursuant to this Section 2.02 which remains
undistributed  to the  holders  of the  Certificates  for six  months  after the
Effective Time of the Merger shall be delivered to Parent,  upon demand, and any
holders of Certificates  prior to the Merger who have not  theretofore  complied
with this  Article II shall  thereafter  look only to Parent and only as general
creditors  thereof for payment of their claim for Merger Stock,  cash in lieu of
fractional  shares  of Merger  Stock and any  dividends  or  distributions  with
respect to Merger Stock to which such holders may be entitled.

     (g) No Liability.  None of Parent,  Sub, the Company or the Exchange  Agent
shall be  liable to any  person in  respect  of any  shares of Merger  Stock (or
dividends or distributions  with respect thereto) or cash from the Exchange Fund
delivered to a public official  pursuant to any applicable  abandoned  property,
escheat or similar  law.  If any  Certificates  shall not have been  surrendered
prior to three years after the  Effective  Time of the  Merger,  or  immediately
prior to such earlier date on which any Merger  Consideration,  any cash in lieu
of  fractional  shares of Merger Stock or any  dividends or  distributions  with
respect to Merger Stock would otherwise escheat to or become the property of any
Governmental   Entity  (as  defined  in  Section   3.01(d)),   any  such  Merger
Consideration  or cash shall, to the extent  permitted by applicable law, become
the  property  of the  Surviving  Corporation,  free and clear of all  claims or
interest of any person previously entitled thereto.

     (h)  Investment of Exchange  Fund. The Exchange Agent shall invest any cash
included  in the  Exchange  Fund as  directed  by Parent on a daily  basis.  Any
interest  and other  income  resulting  from such  investments  shall be paid to
Parent.

     SECTION  2.03.  Treatment  of  Options.  (a) At the  Effective  Time of the
Merger,  each  outstanding  option to purchase  Company Common Stock (a "Company
Stock Option") issued pursuant to the Company's  Non-Employee  Directors'  Stock
Option Plan (the "Directors'  Plan") or the Company's  Restated Stock Option and
Restricted  Stock  Purchase Plan (the "Option Plan" and,  collectively  with the
Directors' Plan, the "Company Stock Plans"),  whether vested or unvested,  shall
be deemed to constitute an option to acquire,  on the same terms and  conditions
as were  applicable  under such  Company  Stock  Option,  those shares which the
holder of such Company Stock Option would have been entitled to receive pursuant
to the Merger if such holder had exercised such option in full immediately prior
to the  Effective  Time of the  Merger,  at a price per  share  equal to (y) the
aggregate  exercise  price for the shares of Company  Common  Stock  purchasable
pursuant to such Company  Stock Option  divided by (z) the number of full shares
of Merger Stock  deemed  purchasable  pursuant to such  Company  Stock Option (a
"Converted Option");  provided, however, that in the case of any option to which
Section 421 of the Code applies by reason of its qualification under Section 422
of the Code ("incentive stock options"),  the option price, the number of shares
purchasable  pursuant to such option and the terms and conditions of exercise of
such option shall be determined in order to comply with

<PAGE>

                                                                               7

Section  424(a) of the Code,  provided  further  that if the Closing Date occurs
prior to the Distribution Record Date each Converted Option shall be adjusted or
substituted, as the case may be, pursuant to the Parent Transaction.

     (b) As soon as practicable  after the Effective Time of the Merger,  Parent
shall  deliver to the  holders  of Company  Stock  Options  appropriate  notices
setting forth such holders'  rights  pursuant to the Company Stock Plans and the
agreements evidencing the grants of such Company Stock Options shall continue in
effect on the same terms and conditions (subject to adjustments required by this
Section  2.03 after  giving  effect to the Merger and the  provisions  set forth
above and until otherwise  determined).  If necessary,  Parent shall comply with
the terms of the Company Stock Plans and ensure,  to the extent required by, and
subject to the  provisions  of, the Company  Stock  Plans,  that  Company  Stock
Options that qualified as incentive stock options prior to the Effective Time of
the Merger  continue to qualify as incentive  stock  options after the Effective
Time of the Merger.

     (c) Parent  shall  take all  corporate  action  necessary  to  reserve  for
issuance  a  sufficient  number  of shares of  Merger  Stock for  delivery  upon
exercise of Company Stock Options.  As soon as  practicable  after the Effective
Time of the Merger,  Parent shall file a  registration  statement on Form S-3 or
Form S-8, as the case may be (or any successor or other  appropriate  forms), or
another  appropriate form, with respect to the shares of Merger Stock subject to
such options and shall use its reasonable  efforts to maintain the effectiveness
of such  registration  statement or  registration  statements  (and maintain the
current status of the prospectus or prospectuses  contained therein) for so long
as such  options  remain  outstanding.  With  respect to those  individuals  who
subsequent  to the Merger will be subject to the  reporting  requirements  under
Section 16(a) of the Securities  Exchange Act of 1934, as amended (the "Exchange
Act"),  where  applicable,  Parent shall administer the Company Stock Plans in a
manner that complies with Rule 16b-3  promulgated  under the Exchange Act to the
extent the Company Stock Plans complied with such rule prior to the Merger.

     SECTION  2.04.  Treatment of Debt  Securities  and  Warrants.  (a) All debt
securities of the Company that are  outstanding  as of the Effective Time of the
Merger  shall  remain  outstanding  after the  Effective  Time of the  Merger in
accordance with their respective terms and provisions.

     (b) At the  Effective  Time of the  Merger,  each  Warrant  (as  defined in
Section 3.01(c)) that is outstanding and unexercised  immediately  prior thereto
shall,  pursuant  to the terms of such  Warrant,  cease to  represent a right to
acquire shares of Company Common Stock and shall be converted automatically into
a warrant to  purchase  such  number of shares of Merger  Stock as the holder of
such Warrant would have been entitled to receive pursuant to the Merger had such
holder exercised such Warrant in full immediately prior to the Effective Time of
the Merger,  at a price per share equal to (y) the aggregate  exercise price for
the  shares of Company  Common  Stock  otherwise  purchasable  pursuant  to such
Warrant  divided  by (z) the  number  of full  shares  of  Merger  Stock  deemed
purchasable pursuant to such Warrant.

     (c) As soon as practicable  after the Effective Time of the Merger,  Parent
shall deliver to the holders of Warrants  appropriate notices setting forth such
holders' rights pursuant

<PAGE>

                                                                               8

to the applicable warrant agreements with respect thereto to the extent required
by the terms of the warrant agreements with respect thereto.

     (d) Parent shall take (or cause to be taken) all corporate action necessary
to  reserve  for  issuance  a  sufficient  number of shares of Merger  Stock for
delivery upon conversion of the exercise of the Warrants.

                                   ARTICLE III

                         Representations and Warranties

     SECTION 3.01.  Representations  and Warranties of the Company.  The Company
represents and warrants to Parent and Sub as follows:

     (a)  Organization,  Standing and Corporate  Power.  Each of the Company and
each of its  Subsidiaries  (as defined in Section  3.01(b))  is duly  organized,
validly  existing and in good  standing  under the laws of the  jurisdiction  in
which it is organized  and has the  requisite  corporate  power and authority to
carry on its  business as now being  conducted.  Each of the Company and each of
its  Subsidiaries  is duly  qualified  or licensed to do business and is in good
standing in each  jurisdiction  (domestic or foreign) in which the nature of its
business or the ownership or leasing of its properties makes such  qualification
or licensing necessary, other than in such jurisdictions where the failure to be
so qualified or licensed (individually or in the aggregate) could not reasonably
be expected to have a Material  Adverse Effect (as defined in Section 8.04) with
respect to the Company.  Attached as Section 3.01(a) of the disclosure  schedule
delivered  by the  Company  to Parent and Sub at the time of  execution  of this
Agreement (the "Company Disclosure Schedule") are complete and correct copies of
the  Company's   Restated   Certificate  of   Incorporation,   as  amended  (the
"Certificate of Incorporation"), and the Company's Amended and Restated By-laws,
as amended  (the  "By-Laws"),  as  currently  in effect.  The  Company  has made
available to Parent and Sub complete and correct copies of the  certificates  of
incorporation  and by-laws (or other  organizational  documents)  of each of the
Company's Subsidiaries, in each case as amended to the date of this Agreement.

     (b) Subsidiaries.  The only direct or indirect  subsidiaries (as defined in
Section 8.04) of the Company are those listed in Section  3.01(b) of the Company
Disclosure Schedule (collectively,  the "Subsidiaries").  All of the outstanding
shares of capital  stock of each  subsidiary  of the Company  have been  validly
issued and are fully paid and nonassessable  and, except as disclosed in Section
3.01(b)  of  the  Company  Disclosure   Schedule,   are  owned  (of  record  and
beneficially) by the Company,  by another wholly owned subsidiary of the Company
or by the Company and another  such wholly owned  subsidiary,  free and clear of
all pledges, claims, liens, charges,  encumbrances and security interests of any
kind or nature  whatsoever  (collectively,  "Liens").  Except for the  ownership
interests set forth in Section 3.01(b) of the Company Disclosure  Schedule,  the
Company  does  not own,  directly  or  indirectly,  any  capital  stock or other
ownership interest in any corporation,  partnership,  limited liability company,
business association, joint venture or other entity.

<PAGE>

                                                                               9

     (c) Capital Structure. The authorized capital stock of the Company consists
of (x) 20,000,000  shares of Company Common Stock, par value $.01 per share, and
(y) 5,000,000  shares of preferred  stock,  par value $1.00 per share  ("Company
Preferred  Stock"),  of which 1,667,000  shares have been designated as Series A
Convertible  Preferred  Stock.  As of the close of business  on March 20,  1998,
there  were:  (i)   10,612,137   shares  of  Company  Common  Stock  issued  and
outstanding;  (ii) 20,750 shares of Company Common Stock held in the treasury of
the Company;  (iii) 261,398 shares of Company Common Stock reserved for issuance
upon  exercise of Company  Stock  Options  available  for grant  pursuant to the
Company Stock Plans; (iv) 1,086,425 shares of Company Common Stock issuable upon
exercise of awarded but  unexercised  Company  Stock  Options,  with an exercise
price per each awarded but  unexercised  Company Stock Option as is set forth in
Section  3.01(c)(iv) of the Company Disclosure  Schedule;  (v) 250,000 shares of
Company Preferred Stock issuable pursuant to the Rights;  (vi) 100,000 shares of
Company  Common Stock reserved for issuance  pursuant to the Company's  Employee
Stock  Purchase Plan (as defined  below);  (vii) 55,781 shares of Company Common
Stock  issuable  upon  exercise of  currently  outstanding  warrants to purchase
Company Common Stock, all as more particularly described in Section 3.01(c)(vii)
of the Company Disclosure Schedule (collectively,  the "Warrants"),  and with an
exercise price for each such Warrant equal to $12.72 per share of Company Common
Stock;  (viii) no shares of Company Preferred Stock issued and outstanding;  and
(ix) no shares of Company Preferred Stock in the treasury of the Company. Except
as set forth above, as of the close of business on March 20, 1998, there were no
shares of  capital  stock or other  equity  securities  of the  Company  issued,
reserved for issuance or outstanding. All outstanding shares of capital stock of
the  Company  are,  and all shares  which may be issued  pursuant to the Company
Stock Plans, the Rights and the Warrants will be, when issued,  duly authorized,
validly  issued,  fully paid and  nonassessable  and not  subject to  preemptive
rights.  All  securities  issued by the Company were issued in compliance in all
material respects with all applicable  federal and state securities laws and all
applicable  rules  and  regulations   promulgated   thereunder.   There  are  no
outstanding bonds, debentures, notes or other indebtedness or debt securities of
the Company having the right to vote (or convertible  into, or exchangeable for,
securities having the right to vote) on any matters on which stockholders of the
Company  may vote.  Except as set forth  above and except  pursuant to the Stock
Option Agreement, there are no outstanding securities, options, warrants, calls,
rights,  commitments,  agreements,  arrangements  or undertakings of any kind to
which the Company or any of its  Subsidiaries is a party or by which any of them
is bound obligating the Company or any of its Subsidiaries to issue,  deliver or
sell,  or cause to be issued,  delivered or sold,  additional  shares of capital
stock or other  equity  or voting  securities  of the  Company  or of any of its
Subsidiaries  or  obligating  the Company or any of its  Subsidiaries  to issue,
grant,  extend or enter into any such security,  option,  warrant,  call, right,
commitment,  agreement,  arrangement or undertaking. Other than the Stock Option
Agreement and except as disclosed in Section  3.01(c) of the Company  Disclosure
Schedule,  (i) there are no outstanding  contractual  obligations,  commitments,
understandings  or  arrangements  of the Company or any of its  Subsidiaries  to
repurchase,  redeem or  otherwise  acquire or make any payment in respect of any
shares of capital  stock of the Company or any of its  Subsidiaries  and (ii) to
the knowledge of the Company,  there are no irrevocable  proxies with respect to
shares of capital stock of the Company or any of its Subsidiaries. Except as set
forth in  Section  3.01(c)  of the  Company  Disclosure  Schedule,  there are no
agreements or arrangements pursuant to which the Company is or could be required
to register shares of Company Common Stock or other securities of the Company or
any of its Subsidiaries under the Securities Act of 1933, as

<PAGE>

                                                                              10

amended (the "Securities  Act"), or other agreements or arrangements with or, to
the knowledge of the Company, among any securityholders of the Company or any of
its  Subsidiaries  with  respect  to  securities  of the  Company  or any of its
Subsidiaries.

     Since June 30, 1997,  except as disclosed in Section 3.01(c) of the Company
Disclosure  Schedule,  the Company has not (A) issued or  permitted to be issued
any shares of capital stock, or securities  exercisable for or convertible  into
shares of capital stock, of the Company or any of its  Subsidiaries,  other than
(1) pursuant to the Stock Option Agreement,  (2) the grant of any employee stock
options prior to the date of this Agreement pursuant to the Company Stock Plans,
(3) the issuance of Company  Common Stock upon  exercise of the options  granted
pursuant to the Company Stock Plans prior to the date of this  Agreement and (4)
upon exercise of Warrants outstanding on such date; (B) repurchased, redeemed or
otherwise acquired, directly or indirectly through one or more Subsidiaries, any
shares  of  capital  stock of the  Company  or any of its  Subsidiaries;  or (C)
declared,  set aside,  made or paid to the stockholders of the Company or any of
its Subsidiaries  dividends or other  distributions on the outstanding shares of
capital  stock of the Company or any of its  Subsidiaries  (excluding  dividends
declared, set aside, made or paid by wholly owned Subsidiaries to the Company or
any wholly owned Subsidiaries).

     (d) Authority;  Noncontravention.  The Company has the requisite  corporate
power and  authority to enter into each of this  Agreement  and the Stock Option
Agreement and, subject to the Company  Stockholder  Approval in the case of this
Agreement,  to consummate the transactions  contemplated hereby and thereby. The
execution and delivery of each of this Agreement and the Stock Option  Agreement
by the  Company  and  the  consummation  by  the  Company  of  the  transactions
contemplated  hereby and  thereby  have been duly  authorized  by all  necessary
corporate  action  on the  part of the  Company,  subject,  in the  case of this
Agreement,  to the Company  Stockholder  Approval.  This Agreement and the Stock
Option  Agreement  have been duly  executed  and  delivered  by the  Company and
(assuming  due  authorization,   execution  and  delivery  by  Parent  and  Sub)
constitute valid and binding  obligations of the Company enforceable against the
Company in accordance  with their  respective  terms,  subject to the effects of
bankruptcy,  insolvency, fraudulent conveyance,  reorganization,  moratorium and
other similar laws affecting  creditors'  rights  generally,  general  equitable
principles  (whether  considered  in a  proceeding  in  equity or at law) and an
implied  covenant of good faith and fair dealing.  No holder of capital stock of
the Company will be entitled to appraisal  rights under the DGCL or otherwise as
a result of the execution and delivery of this Agreement or the  consummation of
any of the  transactions  contemplated  hereby.  Except as set forth in  Section
3.01(d) of the Company Disclosure  Schedule,  the execution and delivery of each
of this Agreement and the Stock Option  Agreement does not, and the consummation
by the Company of the  transactions  contemplated  by each of this Agreement and
the Stock Option  Agreement and  compliance  by the Company with the  provisions
hereof and thereof will not, conflict with, or result in any breach or violation
of, or any default (with or without notice or lapse of time, or both) under,  or
give rise to a right of termination, cancellation or acceleration of, or a "put"
right with respect to any obligation  under, or to a loss of a material  benefit
under,  or result in the  creation of any Lien  under,  (i) the  Certificate  of
Incorporation or By-laws or the comparable  charter or organizational  documents
of any of the Company's Subsidiaries,  (ii) any loan or credit agreement,  note,
note purchase agreement, bond, mortgage, indenture, lease or any other contract,
agreement, instrument, permit,

<PAGE>

                                                                              11

concession, franchise or license to which the Company or any of its Subsidiaries
is a party or by which the  Company or any of its  Subsidiaries  or any of their
respective  properties or assets are bound or (iii) subject to the  governmental
filings and other matters referred to in the following  sentence,  any judgment,
order, decree,  statute,  law, ordinance,  rule, regulation or arbitration award
applicable  to  the  Company  or any of its  Subsidiaries  or  their  respective
properties  or assets,  other than,  in the case of clauses (ii) and (iii),  any
such conflicts,  breaches,  violations,  defaults,  rights, losses or Liens that
individually  or in the  aggregate  could not  reasonably  be expected to have a
Material Adverse Effect with respect to the Company. No consent, approval, order
or authorization of, or registration,  declaration or filing with, or notice to,
any international organization,  the government of the United States of America,
any  other  nation  or  any  political   subdivision  thereof,   whether  state,
provincial,   local  or  otherwise,  or  any  court,  administrative  agency  or
commission or other governmental authority,  regulatory body or agency, domestic
or foreign (a "Governmental  Entity"),  or any other third party, is required by
or with respect to the Company or any of its Subsidiaries in connection with the
execution and delivery of this  Agreement and the Stock Option  Agreement by the
Company or the  consummation  by the  Company of the  transactions  contemplated
hereby  and  thereby  or the  performance  by  the  Company  of its  obligations
hereunder or thereunder,  except for (i) the filing of a premerger  notification
and  report  form  by  the  Company   under  the   Hart-Scott-Rodino   Antitrust
Improvements  Act of 1976,  as amended  (the "HSR Act"),  and the filing of such
applications  or notices by the  Company as may be  required  pursuant to merger
control, antitrust,  foreign investment or similar laws or regulations in effect
in Canada,  Germany or any political  subdivision thereof,  (ii) the filing with
the Securities and Exchange Commission (the "SEC") and the National  Association
of  Securities  Dealers  (the "NASD") of (A) a proxy  statement  relating to the
Company  Stockholder  Approval (such proxy  statement as amended or supplemented
from  time to time,  the  "Proxy  Statement")  and (B) such  reports  under  the
Exchange Act as may be required in connection  with this Agreement and the Stock
Option Agreement and the transactions contemplated hereby and thereby, (iii) the
filing of the  Certificate of Merger with the Secretary of State of the State of
Delaware and appropriate documents with the relevant authorities of other states
in which the Company is qualified  to do business and (iv) such other  consents,
approvals,  orders,  authorizations,  registrations,  declarations,  filings  or
notices  the  failure  of  which  to  make  or  obtain,  individually  or in the
aggregate,  could not reasonably be expected to (x) prevent or materially  delay
consummation  of  the  Merger  or  the  transactions   contemplated   hereby  or
performance  of the  Company's  obligations  hereunder or under the Stock Option
Agreement or (y) have a Material Adverse Effect with respect to the Company.

     (e) SEC Documents;  Undisclosed Liabilities. The Company has filed with the
SEC all reports,  schedules,  forms,  statements  and other  documents  required
pursuant  to the  Securities  Act and the  Exchange  Act since  January  1, 1996
(collectively, and in each case including all exhibits and schedules thereto and
documents  incorporated by reference therein, the "SEC Documents").  As of their
respective dates, the SEC Documents complied as to form in all material respects
with the requirements of the Securities Act or the Exchange Act, as the case may
be, and the rules and regulations of the SEC promulgated  thereunder  applicable
to such  SEC  Documents.  As of  their  respective  dates,  (i)  none of the SEC
Documents  (including any and all financial  statements  included therein) filed
pursuant to the  Securities Act or any rule or regulation  thereunder  contained
any  untrue  statement  of a material  fact or omitted to state a material  fact
required  to be stated  therein  or  necessary  in order to make the  statements
therein not

<PAGE>

                                                                              12

misleading  and (ii) none of the SEC Documents  (including any and all financial
statements  included  therein) filed pursuant to the Exchange Act or any rule or
regulation  thereunder  contained  any untrue  statement  of a material  fact or
omitted to state a material fact  required to be stated  therein or necessary in
order to make the statements  therein,  in the light of the circumstances  under
which they were made,  not  misleading.  Except to the extent  that  information
contained in any SEC Document  has been revised or  superseded  by a later filed
SEC  Document,  none  of the SEC  Documents  (including  any  and all  financial
statements included therein) contains any untrue statement of a material fact or
omits to state a material  fact  required to be stated  therein or  necessary in
order to make the statements  therein,  in the light of the circumstances  under
which they were made, not misleading.  The consolidated  financial statements of
the Company  included in all SEC Documents filed since January 1, 1996 (the "SEC
Financial  Statements")  comply  as  to  form  in  all  material  respects  with
applicable  accounting  requirements  and the published rules and regulations of
the SEC with respect  thereto,  have been prepared in accordance  with generally
accepted accounting  principles  (except, in the case of unaudited  consolidated
quarterly financial  statements,  as permitted by Form 10-Q of the SEC), applied
on a consistent basis during the periods involved (except as may be indicated in
the notes thereto). The SEC Financial Statements fairly present the consolidated
financial  position of the Company and its  consolidated  Subsidiaries as of the
dates thereof and the  consolidated  results of their  operations and cash flows
for  the  periods  then  ended  (subject,  in the  case of  unaudited  quarterly
statements,  to normal  recurring  audit  adjustments).  Except as  disclosed in
Section  3.01(e) of the  Company  Disclosure  Schedule,  as of the date  hereof,
neither  the  Company  nor  any of  its  Subsidiaries  has  any  liabilities  or
obligations of any nature (whether accrued,  absolute,  contingent or otherwise)
required  by  generally  accepted  accounting  principles  to be  recognized  or
disclosed on a consolidated balance sheet of the Company and its Subsidiaries or
in  the  notes  thereto,   except  (i)  liabilities  reflected  in  the  audited
consolidated  balance  sheet of the  Company  as of June 30,  1997 or the  notes
thereto  (the  "1997  Balance  Sheet")  included  in  the  SEC  Documents,  (ii)
liabilities  disclosed in any Recent SEC Document and (iii) liabilities incurred
since June 30,  1997 in the  ordinary  course of business  consistent  with past
practice.

     (f)  Information  Supplied.  None  of  the  information  supplied  or to be
supplied by the Company for inclusion or  incorporation  by reference in (i) the
registration  statement on Form S-4 to be filed with the SEC in connection  with
the  issuance of Merger  Stock in the Merger (the "Form S-4") will,  at the time
the Form S-4 is filed with the SEC, at any time it is amended or supplemented or
at the time it becomes  effective under the Securities  Act,  contain any untrue
statement of a material  fact or omit to state any material  fact required to be
stated  therein or necessary to make the  statements  therein not  misleading or
(ii) the Proxy  Statement  will, at the date it is first mailed to the Company's
stockholders or at the time of the  Stockholders  Meeting (as defined in Section
5.01(c)),  contain any untrue  statement of a material fact or omit to state any
material  fact  required to be stated  therein or necessary in order to make the
statements therein, in the light of the circumstances under which they are made,
not  misleading.  The Proxy  Statement  will  comply as to form in all  material
respects with the requirements of the Exchange Act and the rules and regulations
promulgated  thereunder,  except that no  representation  is made by the Company
with respect to statements made or  incorporated  by reference  therein based on
information  supplied in writing by Parent or Sub  specifically for inclusion or
incorporation by reference therein.

<PAGE>

                                                                              13

     (g) Absence of Certain  Changes or Events.  Except as  disclosed in Section
3.01(g) of the Company  Disclosure  Schedule or in the Recent SEC  Documents (as
defined in Section  8.04),  during the period  from June 30,  1997  through  and
including the date hereof,  each of the Company and each of its Subsidiaries has
conducted  its  business  only  in the  ordinary  course  consistent  with  past
practice,  and  there  is not and has not been  since  June  30,  1997:  (i) any
Material  Adverse  Change  (as  defined in  Section  8.04)  with  respect to the
Company;  (ii) any condition,  event or occurrence which, as of the date of this
Agreement,  individually  or in the aggregate,  could  reasonably be expected to
have a Material  Adverse  Effect  with  respect to the Company or give rise to a
Material Adverse Change with respect to the Company; (iii) any action or failure
to act which,  if it had been  taken or not taken  after the  execution  of this
Agreement, would have required the consent of Parent pursuant to this Agreement;
or (iv)  any  condition,  event  or  occurrence  which,  individually  or in the
aggregate,  could  reasonably  be  expected to prevent or  materially  delay the
ability of the  Company to  consummate  the  transactions  contemplated  by this
Agreement or the Stock Option Agreement or perform its obligations  hereunder or
thereunder.

     (h)  Litigation;  Labor  Matters;  Compliance  with  Laws.  (i)  Except  as
disclosed in Section  3.01(h)(i)  of the Company  Disclosure  Schedule or in the
Recent  SEC  Documents,  as of the date  hereof,  there is (1) no suit,  action,
arbitration or proceeding  pending,  and (2) to the knowledge of the Company, no
suit,  action,  arbitration or proceeding  threatened  against or  investigation
pending,  in each case with  respect to the  Company or any of its  Subsidiaries
that,  individually or in the aggregate,  could reasonably be expected to have a
Material  Adverse  Effect with  respect to the Company or prevent or  materially
delay the ability of the Company to consummate the transactions  contemplated by
this  Agreement  or the Stock  Option  Agreement  or to perform its  obligations
hereunder  or  thereunder,   nor  is  there  any  judgment,   decree,  citation,
injunction,  rule or order of any Governmental Entity or arbitrator  outstanding
against the Company or any of its  Subsidiaries  which,  individually  or in the
aggregate, has or could reasonably be expected to have a Material Adverse Effect
with  respect to the Company or prevent or  materially  delay the ability of the
Company to consummate  the  transactions  contemplated  by this Agreement or the
Stock Option Agreement or to perform its obligations hereunder or thereunder. To
the knowledge of the Company,  except as disclosed in Section  3.01(h)(i) of the
Company  Disclosure  Schedule  or in the  Recent SEC  Documents,  as of the date
hereof  there is no  reasonable  basis  for any  action,  suit,  arbitration  or
proceeding that, individually or in the aggregate,  could reasonably be expected
to have a Material  Adverse  Effect  with  respect to the  Company or prevent or
materially  delay the  ability of the  Company to  consummate  the  transactions
contemplated  by this Agreement or the Stock Option  Agreement or to perform its
obligations hereunder or thereunder.

     (ii) Except as disclosed in Section  3.01(h)(ii) of the Company  Disclosure
Schedule or in the Recent SEC Documents,  (1) neither the Company nor any of its
Subsidiaries  is a party to, or bound by, any collective  bargaining  agreement,
contract  or  other  agreement  or  understanding  with a labor  union  or labor
organization;  (2) as of the  date  hereof,  to the  knowledge  of the  Company,
neither the Company nor any of its Subsidiaries is the subject of any proceeding
asserting  that it or any of its  Subsidiaries  has  committed  an unfair  labor
practice or seeking to compel it to bargain  with any labor  organization  as to
wages  or  conditions  of  employment;  (3) as of the date  hereof,  there is no
strike, work stoppage or other similar labor

<PAGE>

                                                                              14

dispute  involving it or any of its  Subsidiaries  pending or, to its knowledge,
threatened;  (4) as of the date  hereof,  no  grievance  is  pending  or, to the
knowledge  of  the  Company,  threatened  against  the  Company  or  any  of its
Subsidiaries  which,  individually  or in the  aggregate,  could  reasonably  be
expected to have a Material  Adverse Effect with respect to the Company;  (5) to
the  knowledge of the Company,  the Company and each of its  Subsidiaries  is in
compliance  with  all  applicable  laws  (domestic  and  foreign),   agreements,
contracts and policies  relating to  employment,  employment  practices,  wages,
hours and terms and  conditions of employment  except for failures so to comply,
if any, that  individually  or in the aggregate could not reasonably be expected
to have a Material  Adverse Effect with respect to the Company;  (6) the Company
and each of its  Subsidiaries  has  complied in all material  respects  with its
payment  obligations  to all  employees of the Company and its  Subsidiaries  in
respect  of all  wages,  salaries,  commissions,  bonuses,  benefits  and  other
compensation  due and  payable to such  employees  under any  policy,  practice,
agreement,  plan,  program  of the  Company  or any of its  Subsidiaries  or any
statute or other law;  (7) neither the  Company nor any of its  Subsidiaries  is
liable  for any  severance  pay or other  payments  to any  employee  or  former
employee  arising  from the  termination  of  employment  under any  benefit  or
severance policy, practice, agreement, plan, or program of the Company or any of
its Subsidiaries, nor to the knowledge of the Company will the Company or any of
its Subsidiaries  have any liability which exists or arises, or may be deemed to
exist or arise,  under any  applicable  law or  otherwise,  as a result of or in
connection with the  transactions  contemplated  hereunder or as a result of the
termination by the Company or any of its Subsidiaries of any persons employed by
the Company or any of its  Subsidiaries on or prior to the Effective Time of the
Merger,  excluding any such payment or liability  which does not exceed  $50,000
individually  or  $500,000 in the  aggregate  with all such other  payments  and
liabilities  not  disclosed  in Section  3.01(h)(ii)  of the Company  Disclosure
Schedule; and (8) the Company and each of its Subsidiaries is in compliance with
its obligations  pursuant to the Worker  Adjustment and Retraining  Notification
Act  of  1988  ("WARN"),  to the  extent  applicable,  and  all  other  employee
notification and bargaining  obligations arising under any collective bargaining
agreement or statute.

     (iii) Each of the Company and each of its  Subsidiaries  holds all permits,
licenses,  variances,  exemptions,  orders  and  approvals  of all  Governmental
Entities  which are material to the  operation of the  businesses of the Company
and its Subsidiaries,  taken as a whole (the "Company Permits"). The Company and
its Subsidiaries are in compliance with the terms of the Company Permits, except
where the failure so to comply, individually or in the aggregate, would not have
a Material  Adverse  Effect with respect to the Company.  Except as disclosed in
Section 3.01(h)(iii) of the Company Disclosure  Schedule,  the businesses of the
Company and its  Subsidiaries  are not being  conducted  in violation of any law
(domestic  or foreign),  ordinance or  regulation  of any  Governmental  Entity,
except for possible violations which,  individually or in the aggregate,  do not
and could not  reasonably  be  expected to have a Material  Adverse  Effect with
respect to the Company.

     (iv) Each of the Company and each of its Subsidiaries have in the past duly
complied,  and are presently duly  complying,  with all applicable laws (whether
statutory or otherwise),  rules, regulations,  orders, judgments or decrees (the
"Laws") of all Governmental Entities, including, without limitation, privacy and
data protection  Laws of any  Governmental  Entity,  except where the failure to
have so complied or to be presently complying would neither

<PAGE>

                                                                              15

have a Material  Adverse  Effect  with  respect to the  Company  nor  constitute
violations of criminal laws that could subject the Company or any  Subsidiary to
criminal  liability.  Neither the Company nor any  Subsidiary  has  received any
notification of or has any knowledge of any asserted  material  failure by it to
comply with any of such Laws.

     (i) Employee Benefit Plans.  (i) Section 3.01(i) of the Company  Disclosure
Schedule  contains a true and  complete  list of each  "employee  benefit  plan"
(within the meaning of section 3(3) of the Employee  Retirement  Income Security
Act of 1974, as amended  ("ERISA")),  governmental  plan or  government-mandated
plan or  arrangement  providing  for  retirement  or  health  or other  employee
benefits  for  which   contributions  are  required  under  any  applicable  Law
("Governmental  Plans"), stock purchase,  stock option,  severance,  employment,
change-in-control,  fringe benefit,  collective  bargaining,  bonus,  incentive,
deferred  compensation  and  all  other  employee  benefit  plans,   agreements,
programs,  policies or other  arrangements  relating to employment,  benefits or
entitlements,  whether or not subject to ERISA (including any funding  mechanism
therefor now in effect or required in the future as a result of the transactions
contemplated by this Agreement or otherwise),  whether formal or informal,  oral
or written,  legally  binding or not under which any employee or former employee
of the Company or any of its  Subsidiaries  has any  present or future  right to
benefits or under which the Company or any of its  Subsidiaries  has any present
or  future  liability  (all  such  plans,  agreements,  programs,  policies  and
arrangements  are  herein  collectively  referred  to as the  "Company  Plans");
provided  that such list does not include  any  employment  agreement  which (i)
provides  for the  payment of annual  cash  compensation  in an amount less than
$50,000 and (ii) does not impose any material obligation upon any of the Company
and its Subsidiaries (the "Excluded Employment Agreements").

     (ii) With respect to each Company Plan (other than the Excluded  Employment
Agreements),  the  Company  has  delivered  to Parent a  current,  accurate  and
complete copy (or, to the extent no such copy exists,  an accurate  description)
thereof and, to the extent applicable, (A) any related trust agreement,  annuity
contract or other funding instrument;  (B) the most recent determination letter;
(C) the current summary plan description and other written communications by the
Company to its employees  concerning the extent of the benefits provided under a
Company  Plan;  and (D) for the most recent year (I) the Form 5500 and  attached
schedules; (II) audited financial statements; (III) actuarial valuation reports;
and (IV) attorney's response to an auditor's request for information.

     (iii)  (A) Each  Company  Plan has been  established  and  administered  in
material compliance with its terms and with the applicable  provisions of ERISA,
the Code and  other  applicable  laws,  rules  and  regulations  (including  the
applicable  laws, rules and regulations of any foreign  jurisdiction);  (B) each
Company  Plan which is  intended to be  qualified  within the meaning of Section
401(a) of the Code is so  qualified  and,  except for the Walsh  America  401(k)
Retirement  Plan,  has  received  a  favorable  determination  letter  as to its
qualification  and  nothing has  occurred,  whether by action or failure to act,
which  would  cause  the loss of such  qualification;  (C) with  respect  to any
Company  Plan,  no  actions,  suits or claims  (other  than  routine  claims for
benefits  in the  ordinary  course)  are  pending  or, to the  knowledge  of the
Company,  threatened,  no facts or circumstances  exist which could give rise to
any such actions, suits or claims and the Company will promptly notify Parent in
writing of any pending claims or,

<PAGE>

                                                                              16

to the knowledge of the Company,  any threatened claims arising between the date
hereof and the Effective Time of the Merger; (D) neither the Company nor, to the
knowledge  of  the  Company,  any  other  party  has  engaged  in  a  prohibited
transaction,  as such term is defined  under  Section  4975 of the Code or ERISA
Section 406,  which would subject the Company or Parent or its  Subsidiaries  to
any material taxes,  penalties or other liabilities under the Code or ERISA; (E)
no event has occurred and no  condition  exists that would  subject the Company,
either  directly  or by  reason  of  its  affiliation  with  any  member  of its
"Controlled  Group"  (defined  as  any  organization  which  is  a  member  of a
controlled  group of organizations  within the meaning of Sections 414(b),  (c),
(m) or (o) of the Code),  to any material tax, fine or penalty imposed by ERISA,
the  Code or  other  applicable  laws,  rules  and  regulations  (including  the
applicable  laws,  rules and regulations of any foreign  jurisdiction);  (F) all
insurance premiums required to be paid and all contributions required to be made
under the terms of any Company Plan, the Code,  ERISA or other  applicable laws,
rules and regulations  (including the applicable  laws, rules and regulations of
any foreign  jurisdiction)  as of the Effective  Time of the Merger have been or
will be timely  paid or made  prior  thereto  and  adequate  reserves  have been
provided  for on the  Company's  balance  sheet for any  premiums  (or  portions
thereof)  and for all  benefits  attributable  to  service  on or  prior  to the
Effective  Time of the Merger;  (G) except for the Source  Information  America,
PMSI  Scott-Levin  and Walsh America 401(k)  Retirement  Plan, each Company Plan
with  respect  to which a Form  5500 has been  filed,  no  material  change  has
occurred  with respect to the matters  covered by the most recent Form since the
date thereof; and (H) no Company Plan provides for an increase in benefits on or
after the Effective Time of the Merger.

     (iv) No Company  Plan is subject to Title IV of ERISA,  and no Company Plan
is a multiemployer  plan as defined in Section  4001(A)(3) of ERISA. The Company
has never been required to contribute to or sponsored any multiemployer  plan or
any plan subject to Title IV of ERISA.

     (v) Except as set forth in Section  3.01(i)(v)  of the  Company  Disclosure
Schedule,  no Company  Plan  exists  which  could  result in the  payment to any
Company  employee  of any money or other  property  or rights or  accelerate  or
provide any other rights or benefits to any Company  employee as a result of the
transactions  contemplated by this Agreement,  whether or not such payment would
constitute a parachute payment within the meaning of Section 280G of the Code.

     (vi) (i) Each Company Plan which is intended to meet the  requirements  for
tax-favored  treatment under Subchapter B of Chapter 1 of Subtitle A of the Code
meets  such  requirements;  and  (ii)  the  Company  has  received  a  favorable
determination  from the  Internal  Revenue  Service  with  respect  to any trust
intended to be qualified within the meaning of Section 501(c)(9) of the Code.

     (vii) Except as provided in Section  3.01(i)(vii) of the Company Disclosure
Schedule, no independent  contractor or other contract employee has participated
or is entitled to participate in any Company Plan.

     (viii) The Employee  Stock Purchase Plan approved by the Board of Directors
of the Company as of December 30, 1997 (the "Employee  Stock Purchase Plan") has
not been put

<PAGE>

                                                                              17

into effect and no person,  including  any employee of the Company or any of its
Subsidiaries,  has  purchased or has any right to purchase any shares of capital
stock of the Company thereunder.

     (j) Taxes. Except as disclosed in Section 3.01(j) of the Company Disclosure
Schedule:  (i) the Company and each of its  Subsidiaries,  and any consolidated,
combined,  unitary  or  aggregate  group  of  which  the  Company  or any of its
Subsidiaries  is or has been a member has timely filed all Tax Returns  required
to be filed by it, or requests for extensions to file such Tax Returns have been
timely  filed,  granted  and have not  expired;  (ii) all such Tax  Returns  are
complete and correct in all material respects; (iii) the Company and each of its
Subsidiaries,  and any  consolidated,  combined,  unitary or aggregate  group of
which the Company or any of it  Subsidiaries  is or has been a member,  has paid
all Taxes due or has  provided  adequate  reserves in its  financial  statements
(other than in respect of deferred taxes) for any Taxes that have not been paid;
(iv) no material  claim for unpaid Taxes has been asserted by a Tax authority or
has become a lien against the property of the Company or any of its Subsidiaries
(other than with respect to Taxes not yet due and payable) or is being  asserted
against the Company or any of its Subsidiaries; (v) no audit or other proceeding
with  respect to any Taxes due from or with respect to the Company or any of its
Subsidiaries  or any Tax Return filed by the Company or any of its  Subsidiaries
is being conducted by any  governmental or Tax authority and the Company and its
Subsidiaries  have not received  notification  in writing that any such audit or
other  proceeding  with  respect to Taxes or any Tax Return is pending;  (vi) no
extension of the statute of  limitations on the assessment of any Taxes has been
granted by the Company or any of its Subsidiaries; and (vii) neither the Company
nor any of its  Subsidiaries  is  subject to  liability  for Taxes of any Person
(other than the Company or its  Subsidiaries),  including,  without  limitation,
liability arising from the application of Treasury  Regulation  section 1.1502-6
or any analogous provision of state, local or foreign law, or as a transferee or
successor,  by contract,  or otherwise.  As used herein,  "Taxes" shall mean all
taxes of any kind,  including,  without  limitation,  those on or measured by or
referred to as income,  gross  receipts,  sales,  use,  ad  valorem,  franchise,
profits, license,  withholding,  payroll, employment, social security, transfer,
net worth, excise, severance, stamp, occupation,  premium, value added, property
or windfall  profits  taxes,  customs,  duties or similar fees,  assessments  or
charges of any kind  whatsoever,  together with any interest and any  penalties,
additions to tax or additional  amounts imposed by any  governmental  authority,
domestic or foreign. As used herein, "Tax Return" shall mean any return,  report
or statement  required to be filed with any governmental  authority with respect
to Taxes.

     (k)  Properties.  Except as  disclosed  in Section  3.01(k) of the  Company
Disclosure  Schedule,  the Company or one of its  Subsidiaries  (i) has good and
marketable  title to all the  properties  and assets (A)  reflected  in the 1997
Balance  Sheet as being owned by the Company or one of its  Subsidiaries  (other
than any such  properties  or assets  sold or disposed of since June 30, 1997 in
the ordinary course of business  consistent with past practice) and (B) acquired
after  June  30,  1997  which  are  material  to  the  Company's  business  on a
consolidated  basis, in each case free and clear of all Liens,  except statutory
Liens securing  payments not yet due and such Liens as do not materially  affect
the use of the  properties  or assets  subject  thereto or  affected  thereby or
otherwise  materially impair business  operations at such properties and (ii) is
the lessee of all leasehold  estates (x) reflected in the 1997 Balance Sheet and
(y)  acquired  after  June 30,  1997 which are  material  to its  business  on a
consolidated basis (except for leases that have expired by their terms since the
date thereof) and is in possession of the properties

<PAGE>

                                                                              18

purported  to be leased  thereunder,  and each such  lease is in full  force and
effect and constitutes a legal,  valid and binding obligation of, and is legally
enforceable  against,  the  respective  parties  thereto  (except as affected by
bankruptcy,  insolvency, fraudulent conveyance,  reorganization,  moratorium and
other similar laws relating to or affecting creditors' rights generally, general
equitable  principles  (whether  considered in a proceeding in equity or at law)
and an implied covenant of good faith and fair dealing), and there is no default
thereunder by the lessee or, to the Company's knowledge,  as of the date hereof,
the lessor that, individually or in the aggregate,  could reasonably be expected
to have a Material  Adverse  Effect with respect to the Company.  As of the date
hereof,  the Company has not received written notice and does not otherwise have
knowledge of any pending,  threatened or  contemplated  condemnation  proceeding
affecting any premises owned or leased by the Company or any of its Subsidiaries
or any part  thereof  or of any sale or other  disposition  of any such owned or
leased premises or any part thereof in lieu of condemnation.

     (l)  Environmental  Matters.  Except as could not reasonably be expected to
result in any liability under or relating to  Environmental  Laws (as defined in
Section 8.04) to the Company or any of its Subsidiaries  which,  individually or
in the aggregate, could reasonably be expected to have a Material Adverse Effect
with respect to the Company:

          (i) each of the Company and each of its Subsidiaries holds and is, and
     has been,  in  compliance  with all  Environmental  Permits  (as defined in
     Section 8.04), and each of the Company and each of its Subsidiaries is, and
     has been,  otherwise in compliance with all Environmental  Laws and, to the
     knowledge of the Company,  there are no  conditions  that might  prevent or
     interfere with such compliance in the future;

          (ii) neither the Company nor any of its  Subsidiaries has received any
     written  Environmental  Claim or has  knowledge of any other  Environmental
     Claim or threatened Environmental Claim;

          (iii) neither the Company nor any of its Subsidiaries has entered into
     any  consent   decree,   order  or  agreement  under  or  relating  to  any
     Environmental Law;

          (iv) there are no past (including, without limitation, with respect to
     assets or businesses  formerly owned,  leased or operated by the Company or
     any of its Subsidiaries) or present actions, activities, events, conditions
     or  circumstances,  including  without  limitation the release,  threatened
     release, emission, discharge, generation, treatment, storage or disposal of
     Hazardous  Materials,  that could  reasonably  be  expected to give rise to
     liability of the Company or any of its Subsidiaries under any Environmental
     Laws; and

          (v) no modification,  revocation, reissuance, alteration, transfer, or
     amendment of the Environmental  Permits,  or any review by, or approval of,
     any third party of the Environmental Permits is required in connection with
     the  execution  or delivery of this  Agreement or the  consummation  of the
     transactions contemplated hereby or the continuation of the business of the
     Company or any of its Subsidiaries following such consummation.

<PAGE>

                                                                              19

     (m)  Contracts;  Debt  Instruments.  (i) Neither the Company nor any of its
Subsidiaries  is, or has received any notice or has any knowledge that any other
party, as of the date hereof, is, or by virtue of the transactions  contemplated
hereby,  will be, in  default  in any  respect  under any  contract,  agreement,
commitment,  arrangement, lease, policy or other instrument to which the Company
or any of its  Subsidiaries  is a party  or by  which  the  Company  or any such
subsidiary is bound,  except for those  defaults  which could not  reasonably be
expected,  either  individually or in the aggregate,  to have a Material Adverse
Effect with respect to the Company; and, to the knowledge of the Company,  there
has not occurred  any event,  nor will this  transaction  by its terms cause the
occurrence of any event,  that with the lapse of time or the giving of notice or
both would constitute such a default.

     (ii) The Company has made  available to Parent (x) true and correct  copies
(or accurate  English  translations)  of all loan or credit  agreements,  notes,
bonds,  mortgages,  indentures and other agreements and instruments  pursuant to
which any indebtedness (as defined in section 8.04) of the Company or any of its
Subsidiaries  in  an  aggregate  principal  amount  in  excess  of  $500,000  is
outstanding  or may be  incurred  and (y)  accurate  information  regarding  the
respective principal amounts currently outstanding thereunder.

     (iii) Except as set forth in Section 3.01(m)(iii) of the Company Disclosure
Schedule, neither the Company nor any of its Subsidiaries is a party to or bound
by any agreement nor is there any judgment, decree, injunction, rule or order of
any Governmental  Authority or arbitrator outstanding against the Company or any
of its  Subsidiaries,  that,  following the Effective Time of the Merger,  would
impose  any  material  restriction  on  the  ability  of  Parent  or  any of its
Subsidiaries  (including  the Surviving  Corporation  and its  Subsidiaries)  to
conduct any of the businesses currently conducted by any of them.

     (iv) Except as set forth in Section  3.01(m)(iv) of the Company  Disclosure
Schedule, neither the Company nor any of its Subsidiaries is a party to or bound
by any  agreement  which,  pursuant to the  requirements  of Form 10-K under the
Exchange Act, would be required to be filed as an exhibit to an Annual Report on
Form  10-K  of the  Company,  except  agreements  included  or  incorporated  by
reference as exhibits to the Company's Annual Report on Form 10-K for the fiscal
year ended June 30, 1997 or any Recent SEC Document.

     (v) Set forth in Section 3.01(m)(v) of the Company Disclosure  Schedule are
all (a) (i) data  supply  contracts  and (ii)  customer  contracts  between  the
Company or any of its Subsidiaries and third parties  involving the provision of
products or services in more than one country; (b) contracts between the Company
or any of its  Subsidiaries,  on the  one  hand,  and  any of  their  respective
directors, officers, employees or affiliates, or any former directors, officers,
employees  or  affiliates  of the  Company,  on the other hand  (other  than the
Excluded  Employment  Agreements);  (c)  joint  venture  and/or  agreements  and
development  agreements  to which the  Company or any of its  Subsidiaries  is a
party; and (d) contracts between the Company or any of its Subsidiaries,  on the
one hand,  either  National Data  Corporation,  Source  Informatics  Inc. and/or
Pharmaceutical  Marketing Services Inc. or any of their respective subsidiaries,
on the other hand.

     (vi) Except as disclosed in Section 3.01(m)(vi) of the Company Disclosure

<PAGE>

                                                                              20

Schedule,  (i) as of the date of this  Agreement,  with  respect  to each of its
current customers,  neither the Company nor any of its Subsidiaries has received
notice to the effect that (or has knowledge  that) any such customer  intends to
terminate or otherwise  modify its  relationship  with the Company or any of its
Subsidiaries or decrease or limit the services  rendered or products sold by the
Company or its Subsidiaries, which termination,  modification, decrease or limit
would in the  aggregate  result in a decrease in revenues of the Company and its
Subsidiaries in an amount in excess of $500,000 on an annualized  basis and (ii)
during the fiscal  year ended June 30,  1997,  no customer of the Company or its
Subsidiaries  terminated or otherwise modified its relationship with the Company
or any of its  Subsidiaries  or decreased  or limited the  services  rendered or
products  sold  by  the  Company  or  its   Subsidiaries,   which   termination,
modification, decrease or limit resulted in an aggregate decrease in revenues of
the Company  and its  Subsidiaries  in an amount in excess of  $500,000  for the
fiscal  year ended June 30,  1997 as  compared to the fiscal year ended June 30,
1996.

     (vii) The Company has not entered  into any material  purchase  commitment,
customer contract or other arrangement with any third party that was not entered
into in the ordinary  course of business of the Company and consistent  with its
past practice or which  contains any material  term that is not  customary  with
respect to commitments, contracts or arrangements of such type.

     (n)  Brokers.  Except  as  disclosed  in  Section  3.01(n)  of the  Company
Disclosure Schedule,  no broker,  investment banker,  financial advisor or other
person,  other than  NationsBanc  Montgomery  Securities  ("NMS"),  the fees and
expenses  of which  will be paid by the  Company  (pursuant  to fee  agreements,
copies of which have been  provided  to Parent),  is  entitled to any  broker's,
finder's,  financial  advisor's or other similar fee or commission in connection
with  the  transactions  contemplated  by this  Agreement  or the  Stock  Option
Agreement  based  upon  arrangements  made by or on behalf of the  Company.  The
Company  agrees to indemnify  Parent and Sub and to hold Parent and Sub harmless
from and against any and all claims,  liabilities or obligations with respect to
any other fee,  commission or expense asserted by any person on the basis of any
act or  statement  alleged  to  have  been  made  by the  Company  or any of its
affiliates.

     (o) Opinion of Financial  Advisor.  The Company has received as of the date
of this  Agreement the opinion of NMS to the effect that,  as of such date,  the
Merger  Consideration is fair, from a financial point of view, to the holders of
Company Common Stock (other than Parent and its affiliates).

     (p) Board Recommendation; State Antitakeover Law. The Board of Directors of
the Company,  at a meeting duly called and held,  has by unanimous vote of those
directors  present  (i)  determined  that this  Agreement  and the Stock  Option
Agreement and the transactions  contemplated  hereby and thereby,  including the
Merger,  taken  together,  are  fair  to  and  in  the  best  interests  of  the
stockholders  of the Company and has taken all actions  necessary on the part of
the Company to render the  restrictions  on business  combinations  contained in
Section 203 of the DGCL inapplicable to this Agreement, the Merger and the Stock
Option Agreement and (ii)

<PAGE>

                                                                              21

resolved to  recommend  that the holders of the shares of Company  Common  Stock
approve this Agreement and the transactions  contemplated herein,  including the
Merger.

     (q) Required  Company Vote.  The Company  Stockholder  Approval,  being the
affirmative  vote of a majority of the outstanding  shares of the Company Common
Stock,  is the only vote of the holders of any class or series of the  Company's
securities  necessary  to  approve  this  Agreement,  the  Merger  and the other
transactions  contemplated  hereby. There is no vote of the holders of any class
or series of the  Company's  securities  necessary  to approve the Stock  Option
Agreement.

     (r)  Intellectual  Property.  (i)  Except  as  otherwise  noted in  Section
3.01(r)(i)  of  the  Company  Disclosure  Schedule,  the  Company  or one of its
Subsidiaries owns or has the right to use all Intellectual  Property material to
the operation of the business of the Company and its  Subsidiaries  as currently
conducted or to products or services  currently under development by the Company
or any of its Subsidiaries (collectively, "Material Intellectual Property"), and
has the right to use,  license,  sublicense or assign the same without liability
to, or any  requirement  of consent  from,  any other  person or party;  in this
regard,  to the  knowledge  of the  Company as of the date  hereof,  no facts or
circumstances exist which would affect the validity, subsistence or existence of
any Material Intellectual Property. Except as set forth in Section 3.01(r)(i) of
the Company Disclosure Schedule,  all Material  Intellectual  Property is either
owned by the Company or its Subsidiaries  free and clear of all Liens or is used
pursuant to an agreement or license and each such  agreement or license is valid
and  enforceable and in full force and effect and neither the Company nor any of
its  Subsidiaries  is in  default  under or in  breach  of any such  license  or
agreement  and, to the  knowledge of the Company as of the date hereof,  none of
the licensors is in default under or in breach of any such license or agreement.
Unless otherwise noted in Section 3.01(r)(i) of the Company Disclosure Schedule,
(i) none of the Material  Intellectual Property infringes or otherwise conflicts
with any proprietary or other right of any person or party;  (ii) as of the date
hereof, there is no pending or threatened  litigation,  adversarial  proceeding,
administrative  action  or  other  challenge  or  claim  relating  to any of the
Material Intellectual Property;  (iii) there is no outstanding judgment,  order,
writ,  injunction  or  decree  relating  to  any of  the  Material  Intellectual
Property;  (iv) as of the date hereof, there is currently no infringement by any
third party of any of the Material Intellectual  Property;  and (v) the Material
Intellectual   Property  owned,   used  or  possessed  by  the  Company  or  its
Subsidiaries  is sufficient  and adequate to conduct the business of the Company
and its Subsidiaries to the full extent as such business is currently conducted.

     (ii) Each of the Company and each of its  Subsidiaries has taken reasonable
steps to protect,  maintain and safeguard their Material Intellectual  Property,
including any Material  Intellectual Property for which improper or unauthorized
disclosure  would  impair its value or validity,  and has  executed  appropriate
nondisclosure  agreements  and made  appropriate  filings and  registrations  in
connection with the foregoing.

     (iii) The  Company  or one of its  Subsidiaries  is the sole and  exclusive
owner of all Software  (which term includes,  without  limitation,  all computer
programs, whether in source code or object code form, algorithms, edit controls,
methodologies,  applications,  flow charts and any and all systems documentation
(including, but not limited to, data entry and data processing

<PAGE>

                                       22

procedures, report generation and quality control procedures), logic and designs
for all programs, and file layouts and written narratives of all procedures used
in the coding or maintenance  of the foregoing)  that is required to conduct the
businesses  of the  Company  and  its  Subsidiaries  to  the  full  extent  such
businesses   are   currently   conducted.   Except  as  set  forth  in   Section
3.01(r)(iii)(b) of the Company Disclosure Schedule, all of the Software owned by
the Company or any of its Subsidiaries,  including, without limitation, Premiere
and   Precise,   is  Year  2000   Compliant   (as  defined  in  Section   8.04).
Notwithstanding anything to the contrary set forth in this Section 3.01(r)(iii),
the term  "Software"  does not include any software  used or held for use by the
Company or its  Subsidiaries  and not owned by the Company or its  Subsidiaries,
including but not limited to any software licensed or leased by third parties to
the Company or its  Subsidiaries and commonly  available  "shrink wrap" software
copyrighted by third parties (collectively,  the "Third Party Software"). All of
the Third Party  Software  required to conduct the businesses of the Company and
its  Subsidiaries to the full extent such businesses are currently  conducted is
used  pursuant to an agreement or license and each such  agreement or license is
valid and  enforceable  and in full force and effect and neither the Company nor
any of its  Subsidiaries is in default under or in breach of any such license or
agreement  and, to the  knowledge of the Company as of the date hereof,  none of
the licensors is in default under or in breach of any such license or agreement.
To the Company's knowledge as of the date hereof, except as set forth in Section
3.01(r)(iii)(c)  of the  Company  Disclosure  Schedule,  all of the Third  Party
Software is Year 2000 Compliant.

     (iv) The Company or one of its Subsidiaries is the sole and exclusive owner
of all  Databases  (which term  includes,  without  limitation,  all  databases,
documentation  and written  narratives of all procedures used in connection with
the collection,  processing and distribution of data contained in the databases)
that are required to conduct the businesses of the Company and its  Subsidiaries
to the full extent such  businesses  are  currently  conducted.  The  Databases,
together with the Third Party  Databases (as defined  below),  contain that data
heretofore  used by the Company and its  Subsidiaries  in the operation of their
respective  businesses.  Except as set forth in  Section  3.01(r)(iv)(b)  of the
Company   Disclosure   Schedule,   the  Databases   are  Year  2000   Compliant.
Notwithstanding  anything to the contrary set forth in this Section  3.1(r)(iv),
the term  "Databases" does not include any databases used or held for use by the
Company and its Subsidiaries and not owned by the Company and its  Subsidiaries,
including, but not limited to, any databases licensed or leased by third parties
to the Company and databases  generally  available to the public  (collectively,
the "Third  Party  Databases").  All of the Third  Party  Databases  required to
conduct the  businesses of the Company and its  Subsidiaries  to the full extent
such  businesses  are  currently  conducted are used pursuant to an agreement or
license and each such agreement or license is valid and  enforceable and in full
force and effect and  neither  the  Company  nor any of its  Subsidiaries  is in
default  under or in  breach  of any  such  license  or  agreement  and,  to the
knowledge  of the Company as of the date  hereof,  none of the  licensors  is in
default  under or in breach of any such license or  agreement.  To the Company's
knowledge as of the date hereof,  except as set forth in Section  3.01(r)(iv)(c)
of the Company  Disclosure  Schedule,  all of the Third Party Databases are Year
2000 Compliant.

     (v) Except as set forth in Section  3.01(r)(v)  of the  Company  Disclosure
Schedule,  to the  knowledge of the  Company,  no  confidential  or trade secret
information of the Company or

<PAGE>

                                                                              23

any of its Subsidiaries has been provided to any party except subject to written
confidentiality agreements.

     (s)  Ownership  of Parent  Common  Stock.  Neither the Company  nor, to its
knowledge,  any of its affiliates or associates (as such terms are defined under
the Exchange Act), (i) beneficially owns,  directly or indirectly,  or (ii) is a
party  to any  agreement,  arrangement  or  understanding  for  the  purpose  of
acquiring,  holding,  voting or  disposing  of, in each case,  shares of capital
stock of Parent which in the aggregate  represent 5% or more of the  outstanding
shares of such capital stock.

     (t) Rights Agreement. (i) The Company has taken all actions necessary so as
to provide that  neither  Parent nor Sub will become an  "Acquiring  Person" and
that no "Flip-In Event",  "Flip-In  Trigger Date",  "Flip-Over  Event",  "Shares
Acquisition Date",  "Redemption Date" or "Distribution  Date" (as such terms are
defined  in the  Rights  Agreement)  will  occur  as a result  of the  approval,
execution or delivery of this  Agreement  or the Stock  Option  Agreement or the
consummation  of the Merger or the acquisition of shares of Company Common Stock
by Parent pursuant to the Stock Option Agreement.

     (ii) The Company has taken all actions necessary with respect to all of the
outstanding  Rights  so that,  immediately  prior to the  Effective  Time of the
Merger,  (A)  neither  Company nor Parent  will have any  obligations  under the
Rights or the Rights  Agreement  and (B) the  holders of the Rights will have no
rights under the Rights or the Rights Agreement.

     SECTION 3.02. Representations and Warranties of Parent and Sub. Parent and
Sub represent and warrant to the Company as follows:

     (a)  Organization,  Standing and Corporate Power.  Each of Parent,  Sub and
each of Parent's "significant  subsidiaries" (within the meaning of Rule 1-02 of
Regulation S- X of the SEC)  (collectively,  the "Parent  Subsidiaries") is duly
organized,  validly  existing  and  in  good  standing  under  the  laws  of the
jurisdiction in which it is organized and has the requisite  corporate power and
authority to carry on its business as now being conducted.  Each of Parent,  Sub
and each of the Parent Subsidiaries is duly qualified or licensed to do business
and is in good standing in each jurisdiction  (domestic or foreign) in which the
nature of its business or the ownership or leasing of its properties  makes such
qualification or licensing necessary, other than in such jurisdictions where the
failure to be so qualified or licensed  (individually or in the aggregate) could
not  reasonably  be expected to have a Material  Adverse  Effect with respect to
Parent.  Parent has made available to the Company complete and correct copies of
its articles of  incorporation  and by-laws and the certificate of incorporation
and by-laws of Sub.

     (b) Capital Structure. (i) As of the date of this Agreement, the authorized
capital stock of Parent  consists of 400,000,000  shares of Parent Common Stock,
10,000,000  shares of Series Common Stock,  $.01 per share,  of Parent  ("Series
Stock") and 10,000,000  shares of preferred  stock, par value $.01 per share, of
Parent  ("Parent  Preferred  Stock").  As of the close of  business on March 10,
1998,  there were:  (i)  171,120,069  shares of Parent  Common  Stock issued and
outstanding;  (ii) 7,702,009  shares of Parent Common Stock held in the treasury
of Parent;  (iii) 12,189,852 shares of Parent Common Stock reserved for issuance
pursuant to Parent's stock

<PAGE>

                                                                              24

option and stock  purchase  plans (such plans,  collectively,  the "Parent Stock
Plans"); (iv) 15,002,581 shares of Parent Common Stock issuable upon exercise of
awarded but  unexercised  stock  options;  and (v) no shares of Series  Stock or
Parent  Preferred  Stock  outstanding.  Except as set forth above and except for
shares of junior  participating  preferred stock issuable pursuant to the Rights
Agreement,  dated as of October 15, 1996, between Parent and First Chicago Trust
Company of New York, as of the close of business on March 10, 1998 there were no
shares of capital stock or other equity  securities of Parent  issued,  reserved
for issuance or outstanding.  All outstanding  shares of capital stock of Parent
are, and all shares which may be issued as described above will be, when issued,
duly authorized, validly issued, fully paid and nonassessable and not subject to
preemptive rights.  There are no outstanding bonds,  debentures,  notes or other
indebtedness  or debt  securities  of  Parent  having  the  right  to  vote  (or
convertible into, or exchangeable  for,  securities having the right to vote) on
any matters on which  stockholders  of the Parent may vote.  Except as set forth
above or in Section 3.02(b) of the disclosure  schedule  delivered by Parent and
Sub to the  Company at the time of  execution  of this  Agreement  (the  "Parent
Disclosure Schedule"),  there are no outstanding securities,  options, warrants,
calls, rights, commitments, agreements, arrangements or undertakings of any kind
to which Parent is a party or by which it is bound  obligating  Parent to issue,
deliver or sell, or cause to be issued,  delivered or sold, additional shares of
capital  stock or other  equity or  voting  securities  of Parent or  obligating
Parent to issue, grant, extend or enter into any such security, option, warrant,
call, right,  commitment,  agreement,  arrangement or undertaking.  There are no
outstanding contractual obligations, commitments, understandings or arrangements
of Parent to  repurchase,  redeem or  otherwise  acquire or make any  payment in
respect of any shares of capital stock of Parent.

     (ii)  During  the  period  from  March 10,  1998  through  the date of this
Agreement,  except as set forth in  Section  3.02(b)  of the  Parent  Disclosure
Schedule,  Parent did not (A) issue or permit to be issued any shares of capital
stock,  or  securities  exercisable  for or  convertible  into shares of capital
stock,  of Parent,  other than  pursuant to or as  permitted by the terms of the
Parent Stock Plans;  (B) repurchase,  redeem or otherwise  acquire,  directly or
indirectly  through  one or more  subsidiaries,  any shares of capital  stock of
Parent;  or (C) declare,  set aside,  make or pay to the  stockholders of Parent
dividends or other  distributions on the outstanding  shares of capital stock of
Parent (other than regular quarterly cash dividends on the Parent Common Stock).

     (iii) As of the date hereof,  the authorized  capital stock of Sub consists
of 1,000  shares of common  stock,  par value $.01 per share,  all of which have
been validly issued,  are fully paid and  nonassessable and are owned by Parent,
free and clear of any Lien.

     (iv) As of the Closing Date, all the issued and  outstanding  shares of the
common stock of Sub will be owned by Parent free and clear of any Lien.

     (c)  Authority;  Noncontravention.   Parent  and  Sub  have  all  requisite
corporate power and authority to enter into each of this Agreement and the Stock
Option  Agreement and to consummate  the  transactions  contemplated  hereby and
thereby.  The  execution  and delivery of each of this  Agreement  and the Stock
Option Agreement by Parent and Sub and the consummation by Parent and Sub of the
transactions contemplated hereby and thereby have been

<PAGE>

                                                                              25

duly authorized by all necessary corporate action on the part of Parent and Sub.
This  Agreement  and the Stock  Option  Agreement  have been duly  executed  and
delivered by each of Parent and Sub and (assuming due  authorization,  execution
and delivery by the Company)  constitute valid and binding obligations of Parent
and Sub, enforceable against them in accordance with their terms, subject to the
effects  of  bankruptcy,  insolvency,  fraudulent  conveyance,   reorganization,
moratorium and other similar laws affecting creditors' rights generally, general
equitable  principles  (whether  considered in a proceeding in equity or at law)
and an  implied  covenant  of good faith and fair  dealing.  The  execution  and
delivery of each of this Agreement and the Stock Option  Agreement does not, and
the  consummation  by Parent and Sub of the  transactions  contemplated  by this
Agreement and compliance by Parent and Sub with the provisions of this Agreement
and the Stock Option Agreement will not,  conflict with, or result in any breach
or violation of, or default  (with or without  notice or lapse of time, or both)
under, or give rise to a right of termination,  cancellation or acceleration of,
or a  "put"  right  with  respect  to any  obligation  under,  or to a loss of a
material  benefit  under,  or result in the creation of any Lien under,  (i) the
certificate of incorporation  or by-laws of Parent,  Sub or any other subsidiary
of Parent, (ii) any loan or credit agreement,  note, bond, mortgage,  indenture,
lease  or  any  other  contract,  agreement,   instrument,  permit,  concession,
franchise or license to which Parent, Sub or any other subsidiary of Parent is a
party or by which any of their  respective  properties  or  assets  are bound or
(iii) subject to the  governmental  filings and other matters referred to in the
following sentence, any judgment, order, decree, statute, law, ordinance,  rule,
regulation  or  arbitration  award  applicable  to  Parent,  Sub  or  any  other
subsidiary of Parent or their  respective  properties or assets,  other than, in
the case of clauses (ii) and (iii),  any such conflicts,  breaches,  violations,
defaults,  rights,  losses or Liens that  individually or in the aggregate could
not  reasonably  be expected to have a Material  Adverse  Effect with respect to
Parent.  No  consent,  approval,  order or  authorization  of, or  registration,
declaration or filing with, or notice to, any  Governmental  Entity or any other
third party is required by or with respect to Parent or Sub in  connection  with
the  execution and delivery of this  Agreement or the Stock Option  Agreement by
Parent and Sub or the  consummation by Parent and Sub of any of the transactions
contemplated  hereby  or  thereby,  except  for (i) the  filing  of a  premerger
notification  and  report  form  under  the  HSR  Act  and  the  filing  of such
applications or notices by Parent and Sub as may be required  pursuant to merger
control, antitrust,  foreign investment or similar laws or regulations in effect
in Canada,  Germany or any political  subdivision thereof,  (ii) the filing with
the SEC and the NYSE of (A) the Form S-4 and (B) such reports under the Exchange
Act as may be required  in  connection  with this  Agreement,  the Stock  Option
Agreement and the transactions contemplated hereby and thereby, (iii) the filing
of the  Certificate  of  Merger  with the  Secretary  of  State of the  State of
Delaware and appropriate documents with the relevant authorities of other states
in which the Company is  qualified  to do  business,  (iv) such other  consents,
approvals,  orders,  authorizations,  registrations,  declarations,  filings  or
notices as may be required  under the  "takeover"  or "blue sky" laws of various
states  and  (v)  such  other  consents,   approvals,  orders,   authorizations,
registrations,  declarations, filings or notices the failure of which to make or
obtain,  individually  or in the aggregate,  could not reasonably be expected to
(x)  prevent  or  materially  delay  consummation  of the  Merger  or the  other
transactions   contemplated   hereby  or   performance  of  Parent's  and  Sub's
obligations  hereunder  and  under  the  Stock  Option  Agreement  or (y) have a
Material Adverse Effect with respect to Parent.

<PAGE>

                                                                              26

     (d) Parent SEC Documents;  Undisclosed  Liabilities.  Parent has filed with
the SEC all reports,  schedules,  forms, statements and other documents required
to be filed by it  pursuant to the  Securities  Act and the  Exchange  Act since
November 1, 1996  (collectively,  and in each case  including  all  exhibits and
schedules thereto and documents  incorporated by reference therein,  the "Parent
SEC Documents"). Except as set forth in Section 3.02(d) of the Parent Disclosure
Schedule,  as of their respective dates, the Parent SEC Documents complied as to
form in all material respects with the requirements of the Securities Act or the
Exchange  Act,  as the case may be,  and the  rules and  regulations  of the SEC
promulgated thereunder applicable to such Parent SEC Documents,  and none of the
Parent  SEC  Documents  (including  any and all  financial  statements  included
therein) as of such dates  contained any untrue  statement of a material fact or
omitted to state a material fact  required to be stated  therein or necessary in
order to make the statements  therein,  in the light of the circumstances  under
which they were made, not misleading.  Except as set forth in Section 3.02(d) of
the Parent Disclosure Schedule,  except to the extent that information contained
in any Parent SEC  Document  has been  revised or  superseded  by a later  filed
Parent SEC  Document,  none of the Parent SEC Documents  (including  any and all
financial  statements  included  therein)  contains  any untrue  statement  of a
material fact or omits to state a material fact required to be stated therein or
necessary  in  order  to  make  the  statements  therein,  in the  light  of the
circumstances under which they were made, not misleading. Except as disclosed in
Section 3.02(d) of the Parent Disclosure  Schedule,  the consolidated  financial
statements of Parent  included in all Parent SEC Documents  filed since November
1,  1996  (the  "Parent  SEC  Financial  Statements")  comply  as to form in all
material  respects with  applicable  accounting  requirements  and the published
rules and  regulations  of the SEC with respect  thereto,  have been prepared in
accordance with generally accepted accounting principles (except, in the case of
unaudited consolidated quarterly financial statements, as permitted by Form 10-Q
of the SEC),  applied on a consistent  basis during the periods involved (except
as may be indicated in the notes  thereto) and fairly  present the  consolidated
financial  position of Parent and its consolidated  subsidiaries as of the dates
thereof and the consolidated  results of their operations and cash flows for the
periods then ended (subject, in the case of unaudited quarterly  statements,  to
normal  recurring  year-end audit  adjustments).  Except as disclosed in Section
3.02(d) of the Parent Disclosure Schedule, as of the date hereof, neither Parent
nor any of its  subsidiaries  has any  liabilities  or obligations of any nature
(whether  accrued,  absolute,  contingent  or  otherwise)  required by generally
accepted  accounting  principles to be recognized or disclosed on a consolidated
balance  sheet of  Parent  and its  consolidated  subsidiaries  or in the  notes
thereto,  except (i) liabilities  reflected in the audited  consolidated balance
sheet of Parent as of December 31, 1997, (ii)  liabilities  disclosed in any SEC
Document filed by Parent prior to the date of this Agreement with respect to any
period ending, or date occurring,  after December 31, 1997 and (iii) liabilities
incurred since December 31, 1997 in the ordinary  course of business  consistent
with past practice.

     (e)  Information  Supplied.  None  of  the  information  supplied  or to be
supplied by Parent or Sub for inclusion or incorporation by reference in (i) the
Form S-4 will, at the time the Form S-4 is filed with the SEC, at any time it is
amended or supplemented or at the time it becomes effective under the Securities
Act,  contain  any  untrue  statement  of a  material  fact or omit to state any
material fact required to be stated  therein or necessary to make the statements
therein not misleading or (ii) the Proxy Statement will, at the date it is first
mailed to the Company's stockholders or at the time of the Stockholders Meeting,
contain any untrue statement

<PAGE>

                                                                              27

of a material  fact or omit to state any  material  fact  required  to be stated
therein or necessary in order to make the  statements  therein,  in the light of
the circumstances  under which they are made, not misleading.  The Form S-4 will
comply  as to  form  in all  material  respects  with  the  requirements  of the
Securities Act and the rules and regulations promulgated thereunder, except that
no  representation  is made by Parent or Sub with respect to statements  made or
incorporated  by reference  therein based on information  supplied in writing by
the Company specifically for inclusion or incorporation by reference therein.

     (f) Absence of Certain  Changes or Events.  Except as  disclosed in Section
3.02(f) of the Parent Disclosure  Schedule,  during the period from December 31,
1997 through and including the date hereof,  there is not and has not been:  (i)
any Material Adverse Change with respect to Parent; (ii) any condition, event or
occurrence which, individually or in the aggregate, could reasonably be expected
to have a Material Adverse Effect or give rise to a Material Adverse Change with
respect  to Parent;  (iii) any  action or  failure to act which,  if it had been
taken or not taken after the  execution of this  Agreement,  would have required
the consent of the Company  pursuant to this  Agreement;  or (iv) any condition,
event or occurrence which, individually or in the aggregate, could reasonably be
expected  to  prevent  or  materially  delay the  ability  of Parent  and Sub to
consummate  the  transactions  contemplated  by this  Agreement  or perform  its
obligations hereunder or under the Stock Option Agreement.

     (g)  Litigation;  Compliance  with Laws. (i) Except as disclosed in Section
3.02(g)(i) of the Parent Disclosure Schedule or in the Parent SEC Documents,  as
of the date hereof,  there is (1) no suit,  action,  arbitration  or  proceeding
pending,  and (2) to the knowledge of Parent,  no suit,  action,  arbitration or
proceeding  threatened  against  or  investigation  pending,  in each  case with
respect  to  Parent  or any of its  subsidiaries  that,  individually  or in the
aggregate,  could  reasonably be expected to have a Material Adverse Effect with
respect to Parent or prevent or  materially  delay the ability of Parent and Sub
to consummate  the  transactions  contemplated  by this  Agreement or to perform
their  obligations  hereunder and under the Stock Option  Agreement nor is there
any judgment,  decree, citation,  injunction,  rule or order of any Governmental
Entity or  arbitrator  outstanding  against  Parent  or any of its  subsidiaries
which,  individually or in the aggregate, has or could reasonably be expected to
have a  Material  Adverse  Effect  with  respect  to the  Company  or prevent or
materially  delay the  ability of the  Company to  consummate  the  transactions
contemplated  by this Agreement or the Stock Option  Agreement or to perform its
obligations  hereunder or  thereunder.  To the  knowledge  of Parent,  except as
disclosed in Section 3.02(g)(i) of the Parent Disclosure  Schedule or in any SEC
Document filed by Parent prior to the date of this Agreement with respect to any
period ending, or date occurring, after December 31, 1997, as of the date hereof
there is no reasonable  basis for any action,  suit,  arbitration  or proceeding
that,  individually or in the aggregate,  could reasonable be expected to have a
Material  Adverse  Effect with respect to Parent or prevent or materially  delay
the ability of Parent or Sub to consummate the transactions contemplated by this
Agreement  or  the  Stock  Option  Agreement  or to  perform  their  obligations
hereunder or thereunder.

     (ii) Except as disclosed in Section  3.02(g)(ii)  of the Parent  Disclosure
Schedule,  the businesses of Parent and its subsidiaries are not being conducted
in violation of any law  (domestic or foreign),  ordinance or  regulation of any
Governmental Entity, except for possible

<PAGE>

                                                                              28

violations  which,  individually  or in the  aggregate,  do not  and  could  not
reasonably be expected to have a Material Adverse Effect with respect to Parent.

     (h)  Brokers.  No broker,  investment  banker,  financial  advisor or other
person, other than Goldman,  Sachs & Co., the fees and expenses of which will be
paid by Parent, is entitled to any broker's,  finder's,  financial  advisor's or
other similar fee or commission in connection with the transactions contemplated
by this Agreement based upon arrangements made by or on behalf of Parent or Sub.
Parent agrees to indemnify the Company and to hold the Company harmless from and
against any and all claims, liabilities or obligations with respect to any other
fee,  commission  or expense  asserted  by any person on the basis of any act or
statement alleged to have been made by Parent or its affiliates.

     (i) Interim  Operations of Sub. Sub was formed on March 11, 1998 solely for
the purpose of engaging in the transactions  contemplated hereby, has engaged in
no  other  business   activities  and  has  conducted  its  operations  only  as
contemplated hereby.

     (j) Required Vote. This Agreement has been approved by Parent,  as the sole
stockholder  of Sub.  No  other  vote of  holders  of any  class  or  series  of
securities of Parent or Sub is necessary to approve this Agreement,  the Merger,
the Stock Option Agreement and the transactions contemplated hereby and thereby.

     (k)  Ownership  of  Company  Common  Stock.  Neither  Parent  nor,  to  its
knowledge,  any of its affiliates or associates (as such terms are defined under
the Exchange Act), (i) beneficially owns,  directly or indirectly,  or (ii) is a
party  to any  agreement,  arrangement  or  understanding  for  the  purpose  of
acquiring,  holding,  voting or  disposing  of, in each case,  shares of capital
stock  of the  Company,  which  in the  aggregate  represent  5% or  more of the
outstanding shares of such capital stock.

                                   ARTICLE IV

           Covenants Relating to Conduct of Business Prior to Merger.

     SECTION 4.01. Conduct of Business.  (a) Conduct of Business by the Company.
During the period from the date of this  Agreement to the Effective  Time of the
Merger  (except  as  otherwise  expressly  contemplated  by the  terms  of  this
Agreement), and except as approved by Parent, the Company shall, and shall cause
each  of its  Subsidiaries  to,  act  and  carry  on its  and  their  respective
businesses in the ordinary course of business  consistent with past practice and
use its and their respective reasonable efforts to preserve substantially intact
its and their current business organizations, keep available the services of its
and  their   current   officers  and   employees  and  preserve  its  and  their
relationships  with customers,  suppliers,  licensors,  licensees,  advertisers,
distributors and others having  significant  business dealings with it and them.
Without  limiting the  generality of the  foregoing,  during the period from the
date of this  Agreement to the Effective  Time of the Merger,  the Company shall
not, and shall not permit any of its Subsidiaries to:

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                                       29

          (i) (x) declare,  set aside or pay any dividends on, or make any other
     distributions in respect of, any of its capital stock, other than dividends
     and distributions by a direct or indirect wholly owned domestic  Subsidiary
     to its parent,  (y) split,  combine or reclassify  any capital stock of the
     Company or any of its  Subsidiaries  or issue or authorize  the issuance of
     any other  securities  in  respect  of, in lieu of or in  substitution  for
     shares of capital stock of the Company or any of its  Subsidiaries,  or (z)
     purchase,  redeem or otherwise  acquire any shares of capital  stock of the
     Company or any of its Subsidiaries or any other  securities  thereof or any
     rights, warrants or options to acquire any such shares or other securities;

          (ii) authorize for issuance, issue, deliver, sell, pledge or otherwise
     encumber any shares of its capital  stock,  any other voting  securities or
     any  securities  convertible  into,  or any rights,  warrants or options to
     acquire,  any such shares,  voting securities or convertible  securities or
     any other securities or equity  equivalents  (including  without limitation
     stock appreciation rights), other than the issuance of Company Common Stock
     upon (i) the exercise of Warrants outstanding on the date of this Agreement
     in  accordance  with their  present  terms and (ii) the exercise of Company
     Stock Options  awarded prior to the date of this Agreement but  unexercised
     on the date of this Agreement in accordance with their present terms;

          (iii)  (A)  amend the  Certificate  of  Incorporation  or  By-Laws  or
     comparable  charter or organizational  documents of any Subsidiary,  or (B)
     amend or terminate the Rights Agreement;

          (iv) acquire or agree to acquire by merging or consolidating  with, or
     by  purchasing a  substantial  portion of the stock or assets of, or by any
     other manner, any business or any corporation,  partnership, joint venture,
     association or other business organization or division thereof;

          (v)  other  than as set forth in  Section  4.01(a)(v)  of the  Company
     Disclosure  Schedule with respect to the sale of certain assets at not less
     than the fair market  value  thereof,  sell,  lease,  license,  mortgage or
     otherwise  encumber or subject to any Lien or  otherwise  dispose of any of
     its properties or assets other than any such properties or assets the value
     of which do not exceed $100,000 individually and $500,000 in the aggregate,
     except sales of inventory  in the  ordinary  course of business  consistent
     with past practice;

          (vi) (A) incur any  indebtedness  for borrowed  money or guarantee any
     such  indebtedness of another person,  issue or sell any debt securities or
     warrants or other rights to acquire any debt  securities  of the Company or
     any of its  Subsidiaries,  guarantee any debt securities of another person,
     enter into any "keep well" or other  agreement  to maintain  any  financial
     statement  condition of another person or enter into any arrangement having
     the  economic  effect  of any  of  the  foregoing,  except  for  short-term
     borrowings incurred in the ordinary course of business consistent with past
     practice  and  intercompany   indebtedness  between  the  Company  and  its
     wholly-owned Subsidiaries or between such wholly owned Subsidiaries, or (B)
     make any loans, advances or capital

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                                                                              30

     contributions to, or investments in, any other person, other than to the
     Company or any direct or indirect wholly owned Subsidiary;

          (vii) acquire or agree to acquire any assets,  other than inventory in
     the ordinary course of business  consistent with past practice,  or make or
     agree to make any capital  expenditures,  except capital  expenditures that
     either are  contemplated  (with  respect to both  nature and amount) by the
     Company's  capital  budget for the fiscal year ending June 30, 1998 (a true
     and correct copy of which is included Schedule  4.01(a)(vii) of the Company
     Disclosure Schedule) or do not exceed $100,000 in the aggregate;

          (viii)  pay,  discharge  or satisfy  any claims  (including  claims of
     stockholders),  liabilities or obligations (absolute,  accrued, asserted or
     unasserted,  contingent or otherwise), except for the payment, discharge or
     satisfaction  of (x)  liabilities or obligations in the ordinary  course of
     business consistent with past practice or in accordance with their terms as
     in effect on the date  hereof and other  liabilities  and  obligations  not
     exceeding $75,000 individually or $250,000 in the aggregate,  or (y) claims
     settled or compromised to the extent permitted by Section 4.01(a)(xii),  or
     waive,  release,  grant, or transfer any rights of material value or modify
     or change in any material  respect any existing  material  license,  lease,
     contract or other  document,  other than in the ordinary course of business
     consistent with past practice;

          (ix) adopt a plan of complete or partial  liquidation  or  resolutions
     providing for or authorizing  such a liquidation or a dissolution,  merger,
     consolidation, restructuring, recapitalization or reorganization;

          (x) enter into or amend any collective bargaining agreement;

          (xi) change any material  accounting  principle  used by it, except as
     required by generally accepted accounting principles;

          (xii) settle or compromise  any  litigation  or claim  (whether or not
     commenced prior to the date of this  Agreement),  other than settlements or
     compromises of litigation or claims that neither  provide for injunctive or
     similar  relief that could be material to the business or operations of the
     Company or any of its  Subsidiaries  nor  require  payments  (after  giving
     effect to insurance  proceeds actually  received or reasonably  believed by
     management  of the Company to be  receivable)  in  settlement or compromise
     exceeding  $75,000,  provided that the aggregate  amount paid in connection
     with the settlement or compromise of all such litigation  matters shall not
     exceed $250,000;

          (xiii) engage in any  transaction  with, or enter into any  agreement,
     arrangement,  or  understanding  with,  directly or indirectly,  any of the
     Company's  affiliates,  including,  without  limitation,  any transactions,
     agreements,  arrangements  or  understandings  with any  affiliate or other
     Person  covered under Item 404 of SEC Regulation S-K that would be required
     to be disclosed under such Item 404, other than

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                                                                              31

     such transactions of the same general nature, scope and magnitude as are
     disclosed in the Company SEC Documents;

          (xiv) transfer to any person or entity any rights to its  Intellectual
     Property,  other than the  provision  of data or the  granting  of end-user
     licenses in the ordinary  course of business  consistent with past practice
     to customers of the Company or its Subsidiaries;

          (xv) enter  into or amend any  agreement  pursuant  to which any other
     party is granted exclusive  marketing or other exclusive rights of any type
     or scope with respect to any of its products or technology; or

          (xvi)  authorize,  or  commit or agree to take,  any of the  foregoing
     actions.

     (b) Conduct of Business by Parent.  During the period from the date of this
Agreement to the Effective Time of the Merger, Parent shall not:

          (i) (x) declare,  set aside or pay any dividends on, or make any other
     distributions  in respect of, any of its capital  stock,  other than (1) in
     connection  with the Parent  Transaction  and (2)  regular  quarterly  cash
     dividends  (in an amount  determined in a manner  consistent  with Parent's
     past  practice)  with  customary  record and payment  dates,  or (y) split,
     combine or  reclassify  any of its capital  stock or issue or authorize the
     issuance of any other  securities in lieu of or in substitution  for shares
     of its capital stock;

          (ii) amend Parent's  articles of  incorporation or by-laws in a manner
     that would be  materially  adverse to the holders of Merger Stock (it being
     understood  that an amendment to the  articles of  incorporation  of Parent
     increasing the number of authorized  shares of Parent Common Stock or other
     capital stock of Parent shall not be deemed to be materially adverse to the
     holders of Merger Stock); or

          (iii)  authorize,  or  commit or agree to take,  any of the  foregoing
     actions.

     (c) Changes in Employment Arrangements.  Neither the Company nor any of its
Subsidiaries  shall (i) adopt or amend  (except as may be  required  by law) any
Company Plan for the benefit or welfare of any  employee,  officer,  director or
former director,  officer or employee, (ii) other than increases for individuals
(other than executive officers and directors) in the ordinary course of business
consistent with past practice,  increase the  compensation or fringe benefits of
any director,  officer, employee or former director,  officer or employee or pay
any benefit not required by any existing plan, arrangement or agreement or (iii)
take any action to implement the Employee Stock Purchase Plan; provided that the
foregoing  shall not prohibit the Company from  entering into  commitments  with
respect to the payment of "stay bonuses" and similar incentive  compensation not
exceeding $300,000 in the aggregate.

     (d) Severance.  Except as  contemplated  by the proviso to the  immediately
preceding  paragraph (c), neither the Company nor any of its Subsidiaries  shall
grant any new or modified  severance or  termination  arrangement or increase or
accelerate any benefits  payable under its severance or termination pay policies
in effect on the date hereof.

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                                                                              32

     (e) WARN.  Neither the Company nor any of its Subsidiaries shall effectuate
a "plant  closing" or "mass  layoff,"  as those terms are defined in WARN,  or a
similar  restructuring  affecting  in whole  or in part any site of  employment,
facility,  operating unit or employee of the Company or any of its Subsidiaries,
without notifying Parent or its affiliates in advance and without complying with
the notice  requirements and other provisions of WARN or any applicable  foreign
laws or regulations.

     (f) Tax Elections.  Except as consistent  with past  practice,  neither the
Company  nor any of its  Subsidiaries  shall make any tax  election or settle or
compromise any federal, state, local or foreign tax liability.

     (g)  Tax-Free  Reorganization  Treatment.  No party  shall,  and none shall
permit any of its subsidiaries to,  intentionally  take or cause to be taken any
action  which  would  disqualify  the  Merger as a  "reorganization"  within the
meaning of Section 368(a) of the Code;  provided that the foregoing shall not be
construed to restrict Parent from completing the Parent Transaction.

     (h) Nominee Shares.  The Company shall cause any person who owns any shares
of  capital  stock of any of the  Company's  Subsidiaries,  whether  in trust or
pursuant to any nominee arrangement with the Company or any of its Subsidiaries,
to transfer,  effective  not later than the  Effective  Time of the Merger,  all
right,  title  and  interest  in and to such  shares  to  Parent  or any  person
designated by Parent.

     (i) Other  Actions.  Neither the Company nor Parent shall,  or shall permit
any of their respective  subsidiaries to, (i)  intentionally  take any action or
fail to take any action  that,  if taken or not taken on or prior to the date of
this Agreement, would have resulted in any of its representations and warranties
set forth in this  Agreement  being  untrue  in any  material  respect,  or (ii)
intentionally  take any action  that would or  reasonably  might be  expected to
result in any of the  conditions to the Merger set forth in Article VI not being
satisfied or in a violation of any provision of the Stock Option Agreement.  The
Company and Parent shall  promptly  advise the other party orally and in writing
of (x) any  action or  failure to act of the type set forth in clause (i) above,
(y) the  failure  by such  party to  comply  with  any  covenant,  condition  or
agreement  hereunder or under the Stock Option Agreement and (z) any event which
could reasonably be expected to cause the conditions set forth in Article VI not
being  satisfied;  provided,  however,  that no such  notice  shall  affect  the
representations,  warranties,  covenants  and  agreement  of the  parties or the
conditions to their obligations hereunder.

                                    ARTICLE V

                              Additional Agreements

     SECTION  5.01.  Preparation  of Form S-4 and Proxy  Statement;  Stockholder
Meeting.  (a) Promptly  following the date of this Agreement,  the Company shall
prepare the Proxy  Statement,  and Parent shall prepare and file (or cause to be
prepared and filed) with the SEC the Form S-4 in which the Proxy  Statement will
be included. Parent and the Company shall

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                                                                              33

each use its reasonable  efforts to have the Form S-4 declared  effective  under
the  Securities Act as promptly as  practicable  after such filing.  The Company
will use its reasonable efforts to cause the Proxy Statement to be mailed to the
Company's stockholders as promptly as practicable after the Form S-4 is declared
effective  under the  Securities  Act.  Parent shall also take any action (other
than  qualifying to do business in any state in which it is not now so qualified
or filing a general  consent to service of  process)  required to be taken under
any applicable  state  securities laws in connection with the  registration  and
qualification  of the Merger  Stock to be issued in the Merger,  and the Company
shall furnish all  information  relating to the Company and its  stockholders as
may be reasonably  requested in connection with any such action. The information
provided and to be provided by Parent,  Sub and the Company,  respectively,  (i)
for use in the Form S-4,  at the time the Form S-4 becomes  effective,  shall be
true  and  accurate  in all  material  respects  and  shall  not omit to state a
material  fact  required  to  be  stated  therein  or  necessary  to  make  such
information not misleading and (ii) for use in the Proxy Statement,  on the date
the Proxy Statement is mailed to the Company's  stockholders  and on the date of
the  Stockholders  Meeting  referred to below,  shall be true and correct in all
material  respects and shall not omit to state any material  fact required to be
stated therein or necessary in order to make such  information,  in the light of
the circumstances  under which the statements therein were made, not misleading,
and the Company and Parent each agree to correct any information  provided by it
for use in the Form S-4 and/or the Proxy Statement which shall have become false
or misleading.

     (b) All  mailings to the  Company's  stockholders  in  connection  with the
Merger,  including  the Proxy  Statement,  shall be subject to the prior review,
comment and approval of Parent (such approval not to be unreasonably withheld or
delayed).

     (c) The Company will, as promptly as practicable following the date of this
Agreement and in  consultation  with Parent,  duly call, give notice of, convene
and hold a meeting of its  stockholders  (the  "Stockholders  Meeting")  for the
purpose of approving this Agreement and the  transactions  contemplated  by this
Agreement  to the extent  required by the DGCL.  The Company  will,  through its
Board of  Directors,  recommend to its  stockholders  approval of the  foregoing
matters, as set forth in Section 3.01(p);  provided,  however, that the Board of
Directors  of  the  Company  may  fail  to  make  or  withdraw  or  modify  such
recommendation,  but only to the  extent  that the  Board  of  Directors  of the
Company shall have  concluded in good faith on the basis of written  advice from
outside  counsel  that the failure to take such action  would be contrary to the
fiduciary duties of the Board of Directors of the Company to the stockholders of
the Company under applicable law. Any such recommendation,  together with a copy
of the opinion  referred to in Section  3.01(o),  shall be included in the Proxy
Statement. The Company will use its best efforts to hold such meeting as soon as
practicable after the Form S-4 shall have been declared effective.

     SECTION  5.02.  Access  to  Information;  Confidentiality.  (a) Each of the
Company and Parent shall, and shall cause its respective subsidiaries, officers,
employees,  counsel,  financial advisors and other representatives to, afford to
the other party and its representatives reasonable access during normal business
hours,  during the period  prior to the  Effective  Time of the  Merger,  to its
properties,  books, contracts,  commitments,  personnel and records, and, during
such period, each of the Company and Parent shall, and shall cause its

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                                                                              34

respective  subsidiaries,  officers,  employees and  representatives to, furnish
promptly to the other party (i) a copy of each  report,  schedule,  registration
statement  and other  document  filed by it during such  period  pursuant to the
requirements of Federal or state securities laws and (ii) all other  information
concerning  its  business,  properties,   financial  condition,  operations  and
personnel as such other party may from time to time reasonably request.  Each of
the  Company  and Parent  will hold,  and will cause its  respective  directors,
officers,  employees,   accountants,   counsel,  financial  advisors  and  other
representatives and affiliates to hold, any nonpublic  information in confidence
to the extent  required  by,  and in  accordance  with,  the  provisions  of the
confidentiality  agreement, dated April 22, 1997, between Parent and the Company
(the  "Confidentiality   Agreement"),   which  Confidentiality  Agreement  shall
continue in full force and effect  following  the execution and delivery of this
Agreement.

     (b) No  investigation  pursuant to this  Section  5.02 or  otherwise  shall
affect any representations or warranties of the parties herein or the conditions
to the obligations of the parties hereto.

     SECTION  5.03.  Reasonable  Efforts.  Upon the  terms  and  subject  to the
conditions  set forth in this  Agreement,  each of the parties agrees to use its
reasonable  efforts to take,  or cause to be taken,  all actions,  and to do, or
cause to be done,  and to assist and cooperate  with the other parties in doing,
all things necessary,  proper or advisable under applicable laws and regulations
to consummate and make effective,  in the most expeditious  manner  practicable,
the Merger and the other transactions contemplated by this Agreement,  including
(i)  obtaining  all  consents,   approvals,   waivers,   licenses,   permits  or
authorizations as are required to be obtained (or, which if not obtained,  would
result in an event of default,  termination or  acceleration of any agreement or
any put right under any  agreement)  under any  applicable  law or regulation or
from  any  Governmental  Entities  or  third  parties  in  connection  with  the
transactions  contemplated  by this  Agreement,  (ii)  defending any lawsuits or
other proceedings  challenging this Agreement and (iii) accepting and delivering
additional instruments necessary to consummate the transactions  contemplated by
this Agreement.  The parties agree that each of Parent and Sub, on the one hand,
and the Company,  on the other hand, shall have the opportunity to negotiate and
consult directly with all applicable  Governmental Entities and third parties in
connection with their  consideration  of the  transactions  contemplated by this
Agreement.  Notwithstanding  anything  in this  Section  5.03  to the  contrary,
neither  party shall be required to: (i) expend  material sums of money or grant
material  financial  or other  accommodations  to any  party,  (ii)  divest  any
material  operations or (iii) set aside any material  assets in order to satisfy
the terms of this Section 5.03.

     SECTION 5.04. Indemnification. (a) From and after the Effective Time of the
Merger,  Parent and the Surviving  Corporation shall indemnify,  defend and hold
harmless  each  person  who is now,  or has been at any  time  prior to the date
hereof or who becomes  prior to the Effective  Time of the Merger,  eligible for
indemnification  pursuant to the Certificate of Incorporation and By-Laws or the
constituent   organizational  documents  of  any  Subsidiary  (the  "Indemnified
Parties") against (i) all losses, claims, damages, costs, expenses,  liabilities
or judgments or amounts that are paid in settlement of or in connection with any
claim, action, suit, proceeding or investigation based in whole or in part on or
arising  in  whole  or in part  out of the fact  that  such  person  is or was a
director,  officer  or  employee  of the  Company  or  any of its  Subsidiaries,
pertaining to any matter existing or occurring at or prior to the Effective Time
of

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                                                                              35

the Merger,  whether asserted or claimed prior to, or at or after, the Effective
Time of the Merger  (the  "Indemnified  Liabilities")  and (ii) all  Indemnified
Liabilities based in whole or in part on, or arising in whole or in part out of,
or pertaining to this Agreement or the transactions contemplated hereby, in each
case to the extent  the  Company or such  Subsidiary  would have been  permitted
under the Certificate of Incorporation  and By-laws,  or such other  constituent
organizational  documents, as the case may be, to indemnify such person. Nothing
contained herein shall limit any rights to indemnification which any Indemnified
Party  may have  under  any  indemnification  agreement  or the  Certificate  of
Incorporation  or By-Laws or the  constituent  organizational  documents  of any
Subsidiary.   In  the  event  any  such  claim,  action,  suit,   proceeding  or
investigation is brought against any Indemnified Parties (whether arising before
or after the  Effective  Time of the  Merger),  (i) any counsel  retained by the
Indemnified  Parties for any period after the Effective Time of the Merger shall
be reasonably  satisfactory  to Parent and the Surviving  Corporation  (it being
understood that Reboul,  MacMurray,  Hewitt,  Maynard & Kristol is acceptable to
Parent and the  Surviving  Corporation);  (ii) after the  Effective  Time of the
Merger,  Parent or the Surviving  Corporation  shall pay all reasonable fees and
expenses of such  counsel for the  Indemnified  Parties  promptly as  statements
therefor are  received;  and (iii) after the Effective  Time of the Merger,  the
Surviving Corporation will cooperate in the defense of any such matter, provided
that the  Surviving  Corporation  shall not be liable for any  settlement of any
claim effected without its written consent, which consent, however, shall not be
unreasonably  withheld.  Any Indemnified Party wishing to claim  indemnification
under  this  Section  5.04,  upon  learning  of any such  claim,  action,  suit,
proceeding or investigation,  shall notify Parent and the Surviving  Corporation
(but the  failure so to notify  Parent or the  Surviving  Corporation  shall not
relieve  them from any  liability  which they may have under this  Section  5.04
except to the extent such failure materially prejudices Parent and the Surviving
Corporation),  and shall  deliver to Parent and the  Surviving  Corporation  the
undertaking,  if any,  required  by Section  145(e) of the DGCL.  Parent and the
Surviving  Corporation shall be liable for the fees and expenses  hereunder with
respect to only one law firm to  represent  the  Indemnified  Parties as a group
with respect to each such matter unless there is, under applicable  standards of
professional  conduct,  a  conflict  between  the  positions  of any two or more
Indemnified  Parties that would preclude or render inadvisable joint or multiple
representation of such parties.

     (b) Parent  shall cause to be  maintained  in effect for six years from the
Effective  Time of the  Merger  directors'  and  officers'  liability  insurance
coverage  covering  persons who are directors and officers of the Company on the
date of this Agreement, with respect to matters occurring prior to the Effective
Time of the  Merger,  and  containing  terms and  conditions  which are not less
advantageous  to such  persons than the policies of the Company in effect on the
date  hereof  (the  "Company  Insurance");  provided  that  Parent  shall not be
required  to spend  annually  in excess of 150% of the  annual  premium  for the
Company  Insurance  paid by the  Company as of the date of this  Agreement  (the
"Current Premium"), which Current Premium the Company represents is $175,000 per
annum; provided,  further, that if Parent would be required to spend annually in
excess of 150% of the Current Premium to obtain  insurance having terms not less
advantageous  than the Company  Insurance,  the  Surviving  Corporation  will be
required to spend up to such  amount to  maintain  or procure as much  insurance
coverage as can be procured for such premium.

<PAGE>

                                                                              36

     SECTION  5.05.  Public  Announcements.  Neither  Parent and Sub, on the one
hand, nor the Company, on the other hand, will issue any press release or public
statement with respect to the  transactions  contemplated  by this Agreement and
the Stock Option  Agreement,  including  the Merger,  without the other  party's
prior consent (such consent not to be unreasonably withheld or delayed),  except
as may be required by applicable  law, court process or by obligations  pursuant
to any  agreement  with any  securities  exchange or  quotation  system on which
securities  of the  disclosing  party are listed or quoted.  In  addition to the
foregoing,  Parent,  Sub and the Company  will  consult  with each other  before
issuing,  and provide each other the opportunity to review and comment upon, any
such press release or other public statements with respect to such transactions.
The parties  agree that the initial  press release or releases to be issued with
respect to the  transactions  contemplated  by this Agreement  shall be mutually
agreed upon prior to the issuance thereof.

     SECTION  5.06.  No  Solicitation.  Neither  the  Company  nor  any  of  its
Subsidiaries shall (whether directly or indirectly  through advisors,  agents or
other  intermediaries),  nor  shall  the  Company  or any  of  its  Subsidiaries
authorize  or  permit  any  of  its  or  their  officers,   directors,   agents,
representatives  or  advisors  to,  (a)  solicit,  initiate  or take any  action
knowingly to encourage or facilitate the  submission of inquiries,  proposals or
offers  from  any  person  (other  than  Sub or  Parent)  relating  to  (i)  any
acquisition or purchase of 15% or more of the consolidated assets of the Company
and its  Subsidiaries  or of over 15% of any class of equity  securities  of the
Company or any of its  Subsidiaries,  (ii) any tender  offer  (including  a self
tender offer) or exchange offer that if  consummated  would result in any Person
(as  defined in Section  8.02)  beneficially  owning 15% or more of any class of
equity securities of the Company or any of its significant  Subsidiaries,  (iii)
any merger,  consolidation,  business  combination,  sale of  substantially  all
assets,  recapitalization,   liquidation,  dissolution  or  similar  transaction
involving the Company or any of its Subsidiaries  whose assets,  individually or
in the aggregate,  constitute  more than 15% of the  consolidated  assets of the
Company other than the transactions  contemplated by this Agreement, or (iv) any
other  transaction  the  consummation  of which  would or  could  reasonably  be
expected to impede,  interfere with, prevent or delay the Merger  (collectively,
"Transaction  Proposals"),  or agree to or endorse any Transaction  Proposal, or
(b) enter into or participate in any discussions or  negotiations  regarding any
of the foregoing, or furnish to any other person any information with respect to
its  business,  properties  or  assets  or any of the  foregoing,  or  otherwise
cooperate in any way with, or assist or participate in, facilitate or encourage,
any effort or attempt by any other  person  (other  than Sub or Parent) to do or
seek any of the  foregoing;  provided,  however,  that the  foregoing  shall not
prohibit the Company (either directly or indirectly through advisors,  agents or
other intermediaries) from (i) furnishing information pursuant to an appropriate
confidentiality  letter (which letter shall not be less favorable to the Company
in any  material  respect than the  Confidentiality  Agreement)  concerning  the
Company and its  businesses,  properties or assets to a third party who has made
an  unsolicited  bona  fide  written  Transaction  Proposal,  (ii)  engaging  in
discussions or negotiations  with such a third party who has made an unsolicited
bona  fide  written  Transaction   Proposal,   (iii)  following  receipt  of  an
unsolicited bona fide written Transaction Proposal, taking and disclosing to its
stockholders  a position  contemplated  by Rule 14d-9 or Rule 14e-2(a) under the
Exchange Act or otherwise making disclosure to its stockholders,  (iv) following
receipt of an unsolicited  bona fide written  Transaction  Proposal,  failing to
make or  withdrawing,  modifying or amending its  recommendation  referred to in
Section 3.01(p), and/or (v) taking any action

<PAGE>

                                       37

required  to be  taken by the  Company  pursuant  to an  order  by any  court of
competent jurisdiction (other than an order that has been reversed, withdrawn or
stayed),  but in each case referred to in the foregoing  clauses (i) through (v)
only to the  extent  that the  Board of  Directors  of the  Company  shall  have
concluded in good faith on the basis of written advice from outside counsel that
the failure to take such action would be contrary to the fiduciary duties of the
Board of  Directors  of the Company to the  stockholders  of the  Company  under
applicable law; provided, further, that, to the extent that it may do so without
acting in a manner  contrary to its fiduciary  duties under  applicable law, the
Board of Directors of the Company shall advise  Parent  promptly with respect to
the taking of any such action and, in addition, if the Board of Directors of the
Company receives a Transaction Proposal,  then the Company shall promptly inform
Parent of the material terms and conditions of such proposal and the identity of
the person making it. The Company will immediately cease and cause its advisors,
agents  and  other  intermediaries  to cease  any and all  existing  activities,
discussions or negotiations with any parties  conducted  heretofore with respect
to any of the foregoing,  and shall use its reasonable efforts to cause any such
parties in possession  of  confidential  information  about the Company that was
furnished  by or on  behalf  of the  Company  to  return  or  destroy  all  such
information  in the  possession  of any such party or in the  possession  of any
agent or advisor of any such party.

     SECTION  5.07.  Benefit  Matters.  (a)  Parent  shall  cause the  Surviving
Corporation  to maintain  employee  benefit plans (as defined in Section 3(3) of
ERISA) for the benefit of  employees of the Company or its  Subsidiaries,  which
are,  in the  aggregate,  no less  favorable  than those  that  cover  similarly
situated employees of Parent.

     (b)  Parent  will  cause  the  Surviving   Corporation  to  (i)  waive  all
limitations as to preexisting  conditions,  exclusions and waiting  periods with
respect to participation and coverage  requirements  applicable to the employees
of the  Company and its  Subsidiaries  under any Parent  welfare  plan that such
employees  may be eligible to  participate  in after the  Effective  Time of the
Merger and (ii) provide each employee of the Company and its  Subsidiaries  with
credit for any co-payments  and deductibles  paid prior to the Effective Time of
the Merger in satisfying any applicable deductible or out-of-pocket requirements
under any Parent  welfare plans that such  employees are eligible to participate
in after the Effective Time of the Merger.

     (c) Prior to the Closing  Date,  Parent (or IMS if the Closing  Date occurs
after the  Distribution  Record Date) shall  establish an employee  stock option
plan,  having terms and  conditions  comparable  to Parent's  1996 Key Employees
Stock  Incentive  Plan,  pursuant  to which it will  offer to  grant,  as of the
Effective Time of the Merger, options to purchase an aggregate of 250,000 shares
of Parent  Common Stock (or the  appropriate  corollary  number of shares of IMS
Common Stock in light of the Parent and IMS Exchange  Ratios if the Closing Date
occurs  after the  Distribution  Record  Date) at fair market  value,  as of the
Closing Date, to certain  employees of the Company and its  Subsidiaries who are
expected to be Continuing Employees;  the names of such employees and the number
of options to be offered to each shall be set forth in a letter to be  delivered
by Parent (or IMS if the Closing Date occurs after the Distribution Record Date)
to the Company prior to the Closing Date.

     SECTION 5.08. Stock Exchange Listing. Parent shall use all reasonable
efforts to cause the shares of Merger Stock to be issued in the Merger and the
shares of Merger Stock to

<PAGE>

                                                                              38

be reserved for issuance upon exercise of Company Stock Options and/or  Warrants
to be approved for listing on the NYSE, subject to official notice of issuance.

     SECTION 5.09. Letters of the Company's  Accountants.  The Company shall use
its reasonable  efforts to cause to be delivered to Parent a letter of Coopers &
Lybrand  L.L.P.,  the Company's  independent  public  accountants,  dated a date
within two business days before the Form S-4 shall become effective and a letter
of Coopers & Lybrand  L.L.P.,  dated a date within two business  days before the
Closing  Date,  each  addressed  to  Parent,  in form and  substance  reasonably
satisfactory  to  Parent  and  customary  in scope  and  substance  for  letters
delivered by  independent  public  accountants in connection  with  registration
statements similar to the Form S-4.

     SECTION  5.10.  Letters  of  Parent's  Accountants.  Parent  shall  use its
reasonable efforts to cause to be delivered to the Company a letter of Coopers &
Lybrand L.L.P., Parent's independent public accountants, dated a date within two
business days before the Form S-4 shall become effective and a letter of Coopers
& Lybrand L.L.P.  dated a date within two business days before the Closing Date,
each addressed to the Company, in form and substance reasonably  satisfactory to
the Company and  customary  in scope and  substance  for  letters  delivered  by
independent  public  accountants  in  connection  with  registration  statements
similar to the Form S-4.

     SECTION 5.11. Takeover Statute. If any "fair price", "moratorium", "control
share  acquisition",  "interested  shareholder"  or other similar  anti-takeover
statute or  regulation  is or may become  applicable  to the Merger or the other
transactions  contemplated by this Agreement or the Stock Option Agreement, each
of Parent and the Company and their  respective  boards of directors shall grant
such approvals and take such actions as are necessary so that such  transactions
may be consummated as promptly as practicable on the terms  contemplated by this
Agreement or the Stock Option  Agreement,  as the case may be, or the Merger and
otherwise act to eliminate or minimize the effects of such statute or regulation
on such transactions.

                                   ARTICLE VI

                              Conditions Precedent

     SECTION 6.01. Conditions to Obligations of Each Party to Effect the Merger.
The  respective  obligations  of each  party to effect  the Merger and the other
transactions  contemplated  herein  shall be subject to the  satisfaction  on or
prior to the Closing Date of the following  conditions,  any or all of which may
be waived, in whole or in part, to the extent permitted by applicable law:

     (a)  Effectiveness  of Form  S-4.  The Form S-4 shall  have  been  declared
effective  by the SEC under the  Securities  Act. No stop order  suspending  the
effectiveness  of the  Form  S-4  shall  have  been  issued  by the  SEC  and no
proceedings  for that purpose shall have been  initiated or, to the knowledge of
the Company or Parent,  threatened by the SEC. Any material "blue sky" and other
state securities laws applicable to the registration and qualification of the

<PAGE>

                                                                              39

Merger Stock  issuable or required to be reserved for issuance  pursuant to this
Agreement shall have been complied with.

     (b) Stockholder Approval.  The Company Stockholder Approval shall have been
obtained.

     (c) No Order. No Governmental Entity or federal,  state or foreign court of
competent  jurisdiction  shall have enacted,  issued,  promulgated,  enforced or
entered any statute,  rule, regulation,  executive order, decree,  injunction or
other order (whether temporary, preliminary or permanent) which is in effect and
which materially restricts,  prevents or prohibits consummation of the Merger or
any  transaction  contemplated by this Agreement;  provided,  however,  that the
parties  shall use all  reasonable  efforts to cause any such decree,  judgment,
injunction or other order to be vacated or lifted.

     (d) HSR Act and Other Waiting Periods.  The applicable waiting period under
the HSR Act shall have expired or been  terminated and all other waiting periods
specified  under  applicable  laws, and all extensions  thereof,  the passing of
which is legally  required prior to the  consummation of the Merger,  shall have
expired or been terminated.

     (e) NYSE Listing.  The shares of Merger Stock issuable to  stockholders  of
the Company in accordance  with this  Agreement  shall have been  authorized for
listing on the NYSE upon official notice of issuance.

     (f)  Other  Approvals.  Other  than  the  filing  of  merger  documents  in
accordance with Delaware Law, all authorizations,  consents,  waivers, orders or
approvals  required to be  obtained,  and all filings,  notices or  declarations
required to be made, by the Company and Parent prior to the  consummation of the
Merger  and the  other  transactions  contemplated  hereunder  shall  have  been
obtained from, and made with, all required Governmental Entities and all waiting
periods specified under applicable laws and all extensions thereof,  the passing
of which is necessary for such consummation  shall have passed,  except for such
authorizations,  consents,  waivers,  orders,  approvals,  filings,  notices  or
declarations  the  failure  to obtain or make  which  would not have a  Material
Adverse Effect with respect to Parent.

     SECTION 6.02.  Additional  Conditions to Obligations of Parent and Sub. The
obligations  of  Parent  and Sub to  effect  the  Merger  and  the  transactions
contemplated in this Agreement are also subject to the following conditions:

     (a)  Representations  and  Warranties.  Each  of  the  representations  and
warranties of the Company  contained in this  Agreement  that is qualified as to
"materiality,"  "Material  Adverse Change" or "Material Adverse Effect" shall be
true and correct,  and each of the other  representations  and warranties of the
Company  contained in this  Agreement  shall be true and correct in all material
respects,  in each case as of the  Closing  Date as though made on and as of the
Closing Date,  except (i) for changes  specifically  permitted by this Agreement
and (ii) that those representations and warranties which address matters only as
of a  particular  date shall have been true and correct as of such date.  Parent
shall have  received a  certificate  of the chief  executive  officer  and chief
financial officer of the Company to such effect.

<PAGE>

                                                                              40

     (b) Agreements and Covenants.  The Company shall have performed or complied
in all material  respects with all  agreements  and  covenants  required by this
Agreement  to be  performed  or  complied  with by it on or prior to the Closing
Date.  Parent shall have received a certificate of the chief  executive  officer
and chief financial officer of the Company to that effect.

     (c)  No  Litigation.  There  shall  not be  pending  or  threatened  by any
Governmental Entity any suit, action or proceeding (i) challenging or seeking to
restrain or prohibit  the  consummation  of the Merger or any other  transaction
contemplated  by this  Agreement  or the Stock  Option  Agreement  or seeking to
obtain from the Company, Sub or Parent or any of their respective affiliates any
material  amount of damages,  (ii) seeking to prohibit or limit the ownership or
operation by Parent or the Company or any of their respective  affiliates of any
material  portion of their  business or assets or to dispose of or hold separate
any material  portion of their business or assets,  as a result of the Merger or
any  other  transaction  contemplated  by this  Agreement  or the  Stock  Option
Agreement,  (iii)  seeking  to impose  limitations  on the  ability of Parent to
acquire or hold,  or  exercise  full rights of  ownership  of, any shares of the
common stock of the Surviving Corporation,  including,  without limitation,  the
right  to vote  such  common  stock on all  matters  properly  presented  to the
stockholders of the Surviving  Corporation or (iv) seeking to prohibit Parent or
any of its Subsidiaries from effectively controlling in any material respect the
business or operations of the Company and its Subsidiaries  taken as a whole. No
suit,  action or  proceeding by any other person shall be pending that seeks any
of the  relief  or  remedies  described  in  clauses  (i)  through  (iv)  of the
immediately preceding sentence as to which there is a reasonable  possibility of
success  or that  otherwise  could  reasonably  be  expected  to have a Material
Adverse Effect with respect to Parent or the Company.

     (d) Rights Agreement. None of the events described in Section 3, 7, 11, 13,
23 or 24 of the Rights  Agreement shall have occurred,  and the Rights shall not
have become  nonredeemable and shall not become  nonredeemable upon consummation
of the Merger.

     SECTION 6.03.  Additional  Conditions to  Obligations  of the Company.  The
obligation  of the  Company  to effect  the  Merger  and the other  transactions
contemplated in this Agreement are also subject to the following conditions:

     (a)  Representations  and  Warranties.  Each  of  the  representations  and
warranties of Parent and Sub contained in this Agreement that is qualified as to
"materiality,"  "Material  Adverse Change" or "Material Adverse Effect" shall be
true and correct, and each of the other representations and warranties of Parent
and Sub  contained in this  Agreement  shall be true and correct in all material
respects,  in each case as of the  Closing  Date as though made on and as of the
Closing Date,  except (i) for changes  specifically  permitted by this Agreement
and (ii) that those representations and warranties which address matters only as
of a particular  date shall remain true and correct as of such date. The Company
shall have received a certificate of a duly authorized officer of Parent and Sub
to such effect.

     (b)  Agreements  and  Covenants.  Parent  and Sub shall have  performed  or
complied in all material respects with all agreements and covenants  required by
this Agreement

<PAGE>

                                                                              41

to be performed or complied  with by them on or prior to the Closing  Date.  The
Company shall have received a certificate of a duly authorized officer of Parent
and Sub to that effect.

                                   ARTICLE VII

                        Termination, Amendment and Waiver

     SECTION 7.01. Termination. This Agreement may be terminated and abandoned
at any time prior to the Effective Time of the Merger, whether before or after
the Company Stockholder Approval:

     (a) by mutual written consent of Parent and the Company; or

     (b) by either Parent or the Company if any  Governmental  Entity shall have
issued an  order,  decree  or  ruling  or taken  any  other  action  permanently
enjoining,  restraining  or  otherwise  prohibiting  the Merger and such  order,
decree, ruling or other action shall have become final and nonappealable; or

     (c) by  either  Parent or the  Company  if the  Merger  shall not have been
consummated on or before December 31, 1998 (other than due to the failure of the
party seeking to terminate this Agreement to perform its obligations  under this
Agreement  required to be  performed  at or prior to the  Effective  Time of the
Merger); or

     (d) by either  Parent or the  Company  if at the duly held  meeting  of the
stockholders  of the Company  (including any  adjournment  thereof) held for the
purpose of voting on the Merger,  this  Agreement  and the  consummation  of the
transactions  contemplated  hereby, the holders of a majority of the outstanding
shares  of  Company  Common  Stock  shall not have  approved  the  Merger,  this
Agreement and the consummation of the transactions contemplated hereby; or

     (e) by  Parent,  if the  Company or its Board of  Directors  shall have (1)
withdrawn,  modified or amended in any respect adverse to Parent its approval or
recommendation of this Agreement or any of the transactions  contemplated herein
(it being  understood that a communication by the Company that contains only the
information  described  in Rule  14d-9(e)  under the  Exchange  Act shall not be
deemed to be such a modification  or amendment or an action  described in clause
(5) below), (2) failed as promptly as practicable after the Form S-4 is declared
effective to mail the Proxy  Statement to its  stockholders or failed to include
in such statement such recommendation,  (3) recommended any Transaction Proposal
from a person other than Parent or any of its affiliates, (4) resolved to do any
of the foregoing or (5) in response to the  commencement  of any tender offer or
exchange  offer for more than 15% of the  outstanding  shares of Company  Common
Stock, not recommended rejection of such tender offer or exchange offer; or

     (f) by the Company,  if,  pursuant to and in  compliance  with Section 5.06
hereof,  the Board of Directors of the Company concludes in good faith, based on
written advice from

<PAGE>

                                                                              42

outside  counsel,  that in order to avoid  acting  in a manner  contrary  to the
fiduciary duties of the Board of Directors of the Company to the stockholders of
the  Company  under  the  DGCL,  the  Board of  Directors  must not make or must
withdraw or modify its  recommendation  referred  to in Section  3.01(p) and the
Board of Directors does not make or withdraws or modifies such recommendation.

     SECTION 7.02.  Effect of  Termination.  In the event of termination of this
Agreement  by either the  Company or Parent as provided  in Section  7.01,  this
Agreement shall forthwith become void and have no effect,  without any liability
or  obligation  on the  part of  Parent,  Sub or the  Company,  other  than  the
provisions of Section  3.01(n),  Section  3.02(h),  the last sentence of Section
5.02(a)  (and  the  provisions  of the  Confidentiality  Agreement  referred  to
therein),  this Section  7.02,  Section  8.02,  Section  8.07 and Section  8.08.
Nothing  contained in this Section shall relieve any party for any breach of the
representations, warranties, covenants or agreements set forth in this Agreement
(including,  without  limitation,  liability for damages as a result of any such
breach  that gives rise to an  inability  to satisfy  any of the  conditions  to
Closing set forth in Article VI).

     SECTION  7.03.  Amendment.  This  Agreement  may be amended by the  parties
hereto at any time before or after any required approval of matters presented in
connection  with  the  Merger  by the  stockholders  of the  Company;  provided,
however, that after any such approval,  there shall be made no amendment that by
law requires further approval by such stockholders  without the further approval
of such stockholders.  This Agreement may not be amended except by an instrument
in writing signed on behalf of each of the parties hereto.

     SECTION 7.04. Extension; Waiver. At any time prior to the Effective Time of
the Merger,  the parties  hereto may (a) extend the time for the  performance of
any of the  obligations  or other  acts of the  other  parties,  (b)  waive  any
inaccuracies in the representations  and warranties  contained in this Agreement
or in any document  delivered  pursuant to this  Agreement or (c) subject to the
proviso  of  Section  7.03,  waive  compliance  with  any of the  agreements  or
conditions contained in this Agreement.  Any agreement on the part of a party to
any such  extension or waiver shall be valid only if set forth in an  instrument
in  writing  signed on behalf of such  party.  The  failure of any party to this
Agreement  to assert any of its rights under this  Agreement or otherwise  shall
not  constitute  a waiver of such rights.  No single or partial  exercise of any
right,  remedy, power or privilege hereunder shall preclude any other or further
exercise thereof or the exercise of any other right, remedy, power or privilege.
Any waiver shall be effective only in the specific instance and for the specific
purpose for which given and shall not  constitute a waiver to any  subsequent or
other exercise of any right, remedy, power or privilege hereunder.

     SECTION 7.05. Procedure for Termination,  Amendment, Extension or Waiver. A
termination  of this  Agreement  pursuant to Section  7.01, an amendment of this
Agreement pursuant to Section 7.03 or an extension or waiver pursuant to Section
7.04 shall, in order to be effective,  require in the case of Parent, Sub or the
Company, action by its Board of Directors or the duly authorized designee of its
Board of Directors.

<PAGE>

                                                                              43

                                  ARTICLE VIII

                               General Provisions

     SECTION 8.01.  Nonsurvival of Representations  and Warranties.  None of the
representations and warranties in this Agreement or in any instrument  delivered
pursuant to this  Agreement  shall survive the Effective  Time of the Merger and
all such  representations and warranties will be extinguished on consummation of
the Merger and neither the Company,  Parent,  Sub, nor any officer,  director or
employee or stockholder  of any of them shall be under any liability  whatsoever
with  respect to any such  representation  or  warranty  after  such time.  This
Section 8.01 shall not limit any  covenant or agreement of the parties  which by
its terms contemplates performance after the Effective Time of the Merger.

     SECTION 8.02. Fees and Expenses.  (a) (i) If this Agreement shall have been
terminated in accordance with its terms (except pursuant to Section 7.01(b)) and
either of the following shall have occurred: (A) prior to such termination,  any
corporation  (including the Company or any of its  Subsidiaries  or affiliates),
partnership, person, other entity or "group" (as referred to in Section 13(d)(3)
of the  Exchange  Act)  other  than  Parent,  Sub or  any  of  their  respective
affiliates (collectively,  "Persons"), shall have become the beneficial owner of
more  than 15% of the  outstanding  shares  of  Company  Common  Stock (it being
understood  that no  beneficial  owner of  Company  Common  Stock as of the date
hereof shall be deemed such a "Person" unless it acquires  beneficial  ownership
of at least 3% of the outstanding  Common Stock after the date hereof or becomes
a member of a group of which it was not a member as of the date  hereof or which
includes a person which was not a member thereof as of the date hereof);  or (B)
(x)  prior to such  termination,  any  Person  shall  have  made,  or  proposed,
communicated  or disclosed in a manner  which is or otherwise  becomes  public a
bona fide intention to make a Transaction  Proposal  (including by making such a
Transaction  Proposal) and (y) on or prior to March 23, 1999, the Company either
consummates  with a Person a transaction  the proposal of which would  otherwise
qualify as a Transaction Proposal under Section 5.06 or enters into a definitive
agreement  with a Person with  respect to a  transaction  the  proposal of which
would otherwise qualify as a Transaction Proposal under Section 5.06 (whether or
not such Person is the Person referred to in clause (x) above); or

     (ii) if this Agreement is terminated pursuant to Section 7.01(e) or Section
7.01(f);

then the Company shall, (1) in the case of clauses  (a)(i)(A) and (a)(ii) above,
promptly,  but in no event later than one business day after the  termination of
this Agreement and (2) in the case of clause (a)(i)(B) above,  promptly,  but in
no event later than one business day after an event  specified in subclause  (y)
thereof  shall have  occurred,  pay Parent a fee of $4,700,000 in cash which fee
shall be payable in same day funds.  No  termination of this Agreement at a time
when a fee is reasonably expected to be payable pursuant to this Section 8.02(a)
following  termination  of this Agreement  shall be effective  until such fee is
paid.

     (b) In  addition,  in any  case  in  which  a fee is  payable  pursuant  to
paragraph (a) above,  the Company shall  promptly  reimburse  Parent and Sub for
documented reasonable out-of-

<PAGE>

                                                                              44

pocket expenses incurred by either of them in connection with this Agreement and
the Stock Option Agreement, including reasonable accounting,  investment banking
and legal fees and  expenses;  provided  that the  amount of such  reimbursement
shall not exceed $850,000 in the aggregate.

     (c) Except as provided otherwise in paragraphs (a) and (b) above, all costs
and expenses  incurred in  connection  with this  Agreement and the Stock Option
Agreement and the transactions  contemplated hereby and thereby shall be paid by
the party incurring such expenses,  except that the cost of filing, printing and
distributing  the Proxy  Statement  and the Form S-4 shall be borne  equally  by
Parent and the Company.

     SECTION 8.03. Notices.  All notices,  requests,  claims,  demands and other
communications  under this  Agreement  shall be in  writing  and shall be deemed
given if delivered  personally,  sent by overnight  courier  (providing proof of
delivery) or transmitted by confirmed  facsimile to the parties at the following
addresses  (or at such other  address for a party as shall be  specified by like
notice):

     (a) if to Parent or Sub, to

              Cognizant Corporation
              200 Nyala Farms
              Westport, CT 06880

              Attention:  General Counsel
              Fax Number:  (203) 222-4313

     with a copy to:

              Simpson Thacher & Bartlett
              425 Lexington Avenue
              New York, NY  10017

              Attention:  Peter J. Gordon, Esq.
              Fax Number:  (212) 455-2502

     (b)  if to the Company, to

              Walsh International Inc.
              105 Terry Drive, Suite 118
              Newtown, PA  18940

              Attention:  General Counsel
              Fax Number:  (215) 860-3277

<PAGE>

                                                                              45

     with a copy to:

              Reboul, MacMurray, Hewitt, Maynard & Kristol
              45 Rockefeller Plaza

              New York, NY 10111

              Attention:  Robert A. Schwed, Esq.
              Fax Number:  (212) 841-5725

     SECTION 8.04. Definitions. For purposes of this Agreement:

     (a) an  "affiliate"  of any person means  another  person that  directly or
indirectly,  through one or more intermediaries,  controls, is controlled by, or
is under common control with, such first person;

     (b) "Base Price" means $51.792 multiplied by the IMS Fraction;

     (c) "Continuing Employees" means all persons who are actively employed on a
full-time  basis by the Company or its  Subsidiaries  immediately  following the
Effective  Time of the  Merger,  other  than  such  persons,  if any,  as may be
identified  in writing by Parent to the Company not less then five business days
prior to the Closing Date;

     (d) "Environmental  Claim" means any written or oral notice, claim, demand,
action,  suit,  complaint,  proceeding  or  other  communication  by any  person
alleging  liability  or  potential   liability   (including  without  limitation
liability  or  potential  liability  for  investigatory  costs,  cleanup  costs,
governmental response costs, natural resource damages, property damage, personal
injury,  fines or penalties)  arising out of, relating to, based on or resulting
from (A) the presence, discharge, emission, release or threatened release of any
Hazardous Materials at any location, whether or not owned, leased or operated by
the Company or any of its Subsidiaries,  (B) circumstances  forming the basis of
any violation or alleged  violation of any  Environmental  Law or  Environmental
Permit  or (C)  otherwise  relating  to  obligations  or  liabilities  under any
Environmental Laws;

     (e)  "Environmental  Laws" means all applicable  foreign,  federal,  state,
provincial and local statutes, rules, regulations,  ordinances,  orders, decrees
and common or civil law  relating in any manner to  contamination,  pollution or
protection of human health or the environment,  including without limitation the
Comprehensive Environmental Response,  Compensation and Liability Act, the Solid
Waste Disposal Act, the Clean Air Act, the Clean Water Act, the Toxic Substances
Control Act, the Occupational  Safety and Health Act, the Emergency Planning and
Community-Right-to-Know  Act, the Safe Drinking  Water Act, all as amended,  and
similar state and foreign laws;

     (f) "Environmental Permits" means all permits, licenses,  registrations and
other  governmental  authorizations  required under  Environmental  Laws for the
Company and its Subsidiaries to conduct their operations and businesses;

<PAGE>

                                                                              46

     (g) "First Threshold" means $5.00 multiplied by the IMS Fraction;

     (h) "Hazardous Materials" means all hazardous or toxic substances,  wastes,
materials or chemicals,  petroleum (including crude oil or any fraction thereof)
and petroleum  products,  friable  asbestos and  asbestos-containing  materials,
pollutants,  contaminants  and all other  materials,  and  substances  regulated
pursuant  to, or that could  reasonably  be  expected  to  provide  the basis of
liability under, any Environmental Law;

     (i) "IMS Adjustment Factor" means a fraction, the numerator of which is the
sum of the IMS Reference Price and the NMR Reference  Price, and the denominator
of which is the IMS Reference Price;

     (j) "IMS Common Stock Price" means the average of the closing  sales prices
of  IMS  Common  Stock  on  the  NYSE  Composite  Transactions  Tape  on  the 10
consecutive  trading days immediately  preceding the second trading day prior to
the Closing Date;

     (k) "IMS  Exchange  Ratio"  means a fraction of a share of IMS Common Stock
(rounded  to the  nearest  1/1,000th)  equal  to:  (1)  the  product  of  0.3041
multiplied  by the IMS  Adjustment  Factor if the IMS Common  Stock  Price is at
least equal to the Base Price minus the First Threshold but is not more than the
Base Price plus the First Threshold;  (2) $17.27 divided by the IMS Common Stock
Price (rounded to the nearest  1/10,000th) if the IMS Common Stock Price is more
than the sum of the Base  Price plus the First  Threshold  but not more than the
sum of the Base Price plus the Second  Threshold;  (3) $14.23 divided by the IMS
Common  Stock  Price if the IMS  Common  Stock  Price  (rounded  to the  nearest
1/10,000th)  is less than the Base Price minus the First  Threshold but not less
than the Base Price minus the Second Threshold;  (4) the fraction  determined in
accordance  with Exhibit E hereto if the IMS Common Stock Price is more than the
Base Price plus the Second  Threshold  (or  determined  on the same basis as the
fractions  indicated  in Exhibit E if such  excess  exceeds $20 per share of IMS
Common  Stock);  and (5) the fraction  determined in  accordance  with Exhibit F
hereto  if the IMS  Common  Stock  Price is less than the Base  Price  minus the
Second Threshold (or determined on the same basis as the fractions  indicated in
Exhibit F if such shortage exceeds $20 per share of IMS Common Stock);

     (l) "IMS  Fraction"  means a fraction,  the  numerator  of which is the IMS
Reference  Price and the  denominator  of which is the sum of the IMS  Reference
Price and the NMR Reference Price;

     (m) "IMS Reference  Price" means the average of the closing sales prices of
IMS Common Stock on the NYSE Composite  Transactions  Tape on the 10 consecutive
trading days  commencing  on the sixth  trading day  following the date on which
"regular way" trading in the IMS Common Stock begins on the NYSE;

     (n) "indebtedness" means, with respect to any person,  without duplication,
(A) all  obligations  of such  person for  borrowed  money,  or with  respect to
deposits or advances of any kind to such  person,  (B) all  obligations  of such
person evidenced by bonds,  debentures,  notes or similar  instruments,  (C) all
obligations of such person under conditional sale or other title

<PAGE>

                                       47

retention  agreements  relating to property  purchased by such  person,  (D) all
obligations  of such person issued or assumed as the deferred  purchase price of
property or services (excluding  obligations of such person to creditors for raw
materials,  inventory,  services and supplies incurred in the ordinary course of
such person's  business),  (E) all capitalized lease obligations of such person,
(F) all obligations of others secured by any Lien on property or assets owned or
acquired by such person,  whether or not the  obligations  secured  thereby have
been assumed, (G) all obligations of such person under interest rate or currency
hedging transactions (valued at the termination value thereof),  (H) all letters
of credit  issued for the  account of such  person  and (I) all  guarantees  and
arrangements  having the  economic  effect of a guarantee  of such person of any
indebtedness of any other person;

     (o)  "Intellectual  Property"  means all rights,  privileges and priorities
provided  under  federal,  state,  foreign  and  multinational  law  relating to
intellectual property,  whether registered or unregistered,  including,  without
limitation, all (i) (a) inventions,  discoveries,  processes, formulae, designs,
methods,  techniques,   procedures,  concepts,  developments,   technology,  and
confidential  information,  new and useful  improvements  thereof  and  know-how
relating thereto, whether or not patented or eligible for patent protection; (b)
copyrights and copyrightable works, including computer  applications,  programs,
Software,  Databases and related items;  (c)  trademarks,  service marks,  trade
names, brand names,  product names,  corporate names, logos and trade dress, the
goodwill of any business symbolized thereby,  and all common-law rights relating
thereto;  and (d) trade secrets,  data and other confidential  information;  and
(ii) all registrations,  applications, recordings, and licenses or other similar
agreements related to the foregoing;

     (p)  "knowledge"  means,  with  respect to any  matter,  (i) in the case of
Parent, the knowledge of any director,  executive officer or the General Counsel
of  Parent  after  due  inquiry  into  such  matter  and (ii) in the case of the
Company, the knowledge of Messrs. Turner, Hauck, Mander, Williams,  Benjamin and
Waugh after due inquiry into such matter;

     (q) "Material  Adverse Change" means, when used with respect to the Company
or Parent,  any change that,  either  individually  or in the aggregate with all
other such changes,  is materially adverse to the Company or Parent, as the case
may be, and their respective subsidiaries taken as a whole;

     (r) "Material  Adverse Effect" means, when used with respect to the Company
or Parent, any change,  effect, event or occurrence that, either individually or
in the aggregate with all other such changes,  effects,  events and occurrences,
either  (a)  is  materially  adverse  to  the  business,  properties,  financial
condition or results of operations of the Company or Parent, as the case may be,
and their  respective  subsidiaries  taken as a whole, or (b) will be materially
adverse  to  the  business,  properties,   financial  condition  or  results  of
operations of Parent and its subsidiaries  (including the Surviving Corporation)
taken as a whole following the Effective Time of the Merger;

     (s) "NMR Reference  Price" means the average of the closing sales prices of
Parent  Common  Stock  on  the  NYSE  Composite  Transactions  Tape  on  the  10
consecutive trading

<PAGE>

                                                                              48

days  commencing on the sixth  trading day following the date on which  "regular
way"  trading  in Parent  Common  Stock  begins  under the name  "Nielsen  Media
Research, Inc." on the NYSE;

     (t) "Parent"  shall have the meaning  specified  in the first  paragraph of
this Agreement; provided that in the event of an assignment of this Agreement as
provided in Section 8.09(b), the term "Parent" thereafter shall have the meaning
specified in such Section;

     (u) "Parent  Common  Stock  Price"  means the average of the closing  sales
prices  of  Parent  Common  Stock  on the  New  York  Stock  Exchange  Composite
Transactions  Tape  on  each  of the 15  consecutive  trading  days  immediately
preceding the second trading day prior to the Effective Time of the Merger;

     (v) "Parent  Exchange  Ratio" means a fraction of a share of Parent  Common
Stock  (rounded to the  nearest  1/1000th)  equal to: (1) 0.3041,  if the Parent
Common Stock Price is equal to at least $46.792 but not more than  $56.792;  (2)
$17.27  divided  by the  Parent  Common  Stock  Price  (rounded  to the  nearest
1/10,000th)  if the Parent  Common Stock Price is more than $56.792 but not more
than $62.792;  (3) $14.23  divided by the Parent Common Stock Price  (rounded to
the nearest  1/10,000th)  if the Parent  Common Stock Price is less than $46.792
but not less  than  $40.792;  (4) the  indicated  fraction  of a share of Parent
Common Stock set forth  opposite  the  applicable  Parent  Common Stock Price in
Exhibit C hereto if the Parent  Common  Stock Price is either more than  $62.792
but not more than $82.792 or less than $40.792 but not less than $20.792; or (5)
a fraction of a share of Parent Common Stock determined on the same basis as the
fractions set forth in Exhibit C hereto if the Parent Common Stock Price is more
than $82.792 or less than $20.792;

     (w)  "person"  means  an  individual,  corporation,   partnership,  limited
liability   company,   joint   venture,   association,   trust,   unincorporated
organization or other entity;

     (x) "Recent SEC  Documents"  means any SEC  Documents  filed by the Company
prior to the date of this Agreement  with respect to any period  ending,  or any
date occurring, on or after June 30, 1997;

     (y)  "Rights"  means the rights to acquire  one-third of a share of Company
Common Stock pursuant to the Rights Agreement;

     (z) "Rights Agreement" means the Rights Agreement,  dated as of January 28,
1998 between the Company and Harris Trust Company of New York;

     (aa) "Second Threshold" means $11.00 multiplied by the IMS Fraction;

     (bb) a "subsidiary"  of any person means another  person,  an amount of the
voting  securities,  other voting ownership or voting  partnership  interests of
which is  sufficient  to elect at least a majority of its Board of  Directors or
other governing body (or, if there are no such voting interests,  50% or more of
the equity  interests of which) is owned  directly or  indirectly  by such first
person; and

<PAGE>

                                                                              49

     (cc) "Year 2000 Compliant" means, when used with respect to any Software or
Database,  that such Software or Database will operate  accurately and,  without
interruption,  accept,  possess and in all manner retain full functionality when
referring  to, or involving,  any year or date in the twentieth or  twenty-first
centuries.

     SECTION 8.05. Interpretation. When a reference is made in this Agreement to
a Section,  Exhibit or Schedule,  such reference shall be to a Section of, or an
Exhibit or Schedule to, this Agreement unless otherwise indicated.  The table of
contents and headings  contained in this  Agreement are for  reference  purposes
only and  shall not  affect in any way the  meaning  or  interpretation  of this
Agreement.  Whenever the words "include",  "includes" or "including" are used in
this  Agreement,  they  shall be deemed  to be  followed  by the words  "without
limitation".

     SECTION 8.06.  Counterparts.  This Agreement may be executed in one or more
counterparts,  all of which shall be considered  one and the same  agreement and
shall become effective when one or more counterparts have been signed by each of
the parties and delivered to the other parties.

     SECTION  8.07.  Entire  Agreement;  No  Third-Party   Beneficiaries.   This
Agreement  and the other  agreements  referred to herein  constitute  the entire
agreement,  and supersede all prior agreements and understandings,  both written
and  oral,  among  the  parties  with  respect  to the  subject  matter  of this
Agreement.  This  Agreement,  other than Section 5.04, is not intended to confer
upon any person other than the parties any rights or remedies.

     SECTION 8.08. GOVERNING LAW. THIS AGREEMENT SHALL BE GOVERNED BY, AND
CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.

     EACH PARTY HERETO HEREBY IRREVOCABLY AND UNCONDITIONALLY:

     (i) SUBMITS FOR ITSELF AND ITS PROPERTY IN ANY LEGAL  ACTION OR  PROCEEDING
RELATING TO THIS AGREEMENT AND ANY RELATED  DOCUMENTS TO WHICH IT IS A PARTY, OR
FOR  RECOGNITION  AND  ENFORCEMENT  OF ANY JUDGMENT IN RESPECT  THEREOF,  TO THE
NONEXCLUSIVE  GENERAL JURISDICTION OF THE COURTS OF THE STATE OF NEW 3 YORK, THE
COURTS OF THE UNITED  STATES OF AMERICA FOR THE  SOUTHERN  DISTRICT OF NEW YORK,
AND APPELLATE COURTS FROM ANY THEREOF;

     (ii)  CONSENTS  THAT ANY SUCH ACTION OR  PROCEEDING  MAY BE BROUGHT IN SUCH
COURTS,  AND WAIVES TRIAL BY JURY AND ANY OBJECTION THAT IT MAY NOW OR HEREAFTER
HAVE TO THE VENUE OF ANY SUCH  ACTION OR  PROCEEDING  IN ANY SUCH  COURT OR THAT
SUCH ACTION OR PROCEEDING WAS BROUGHT IN AN INCONVENIENT COURT AND AGREES NOT TO
PLEAD OR CLAIM THE SAME;

<PAGE>

                                                                              50

     (iii) AGREES THAT SERVICE OF PROCESS IN ANY SUCH ACTION OR  PROCEEDING  MAY
BE EFFECTED BY MAILING A COPY THEREOF BY  REGISTERED  OR CERTIFIED  MAIL (OR ANY
SUBSTANTIALLY  SIMILAR  FORM OF  MAIL),  POSTAGE  PREPAID,  TO THE  PARTY AT ITS
ADDRESS SET FORTH IN SECTION 8.03 OR AT SUCH OTHER  ADDRESS OR TO THE  ATTENTION
OF SUCH OTHER PERSON,  AS ANY PARTY SHALL HAVE SPECIFIED BY NOTICE IN WRITING TO
THE OTHER PARTIES;

     (iv) AGREES THAT NOTHING HEREIN SHALL AFFECT THE RIGHT TO EFFECT SERVICE OF
PROCESS IN ANY OTHER MANNER  PERMITTED BY LAW OR SHALL LIMIT THE RIGHT TO SUE IN
ANY OTHER JURISDICTION; AND

     (v) WAIVES TRIAL BY JURY IN ANY LEGAL ACTION OR  PROCEEDING  REFERRED TO IN
PARAGRAPH (i) ABOVE.

     SECTION  8.09.  Assignment.  (a) Except as provided in paragraph (b) below,
neither this  Agreement nor any of the rights,  interests or  obligations  under
this  Agreement  shall be assigned,  in whole or in part, by operation of law or
otherwise by any of the parties hereto without the prior written  consent of the
other parties hereto. Subject to the preceding sentence,  this Agreement will be
binding upon,  inure to the benefit of, and be  enforceable  by, the parties and
their respective successors and assigns.

     (b) If the Closing Date shall not have occurred  prior to the  Distribution
Record Date, then, on the  Distribution  Record Date: (i) Parent shall cause all
of the  outstanding  capital stock of Sub to be  transferred to IMS; (ii) all of
Parent's rights and obligations  hereunder and under the Stock Option  Agreement
shall be assigned  and  delegated  to IMS;  and (iii)  Parent shall cause IMS to
execute and deliver to the Company a written  instrument,  in form and substance
reasonably   satisfactory  to  the  Company,   evidencing  such  assignment  and
assumption.  In the event of such  assignment  and  assumption,  all  references
herein to "Parent"  (other than in Sections  3.02(b)(ii)  and (iii) and Sections
3.02(f)  through  (k))  shall  thereafter  be  deemed  to be  references  to IMS
(including,  without limitation,  paragraph (a) of Section 6.03), the provisions
of Section 3.02 (other than Sections  3.02(b)(ii) and (iii) and Sections 3.02(f)
through (k)) shall be deemed  amended in their  entirety to read as set forth in
Exhibit D.

     SECTION 8.10. Enforcement.  The parties agree that irreparable damage would
occur  in the  event  that  any of the  provisions  of this  Agreement  were not
performed in accordance with their specific terms or were otherwise breached. It
is  accordingly  agreed that the parties  shall be entitled to an  injunction or
injunctions to prevent  breaches of this  Agreement and to enforce  specifically
the terms and provisions of this Agreement.

<PAGE>

     IN WITNESS WHEREOF,  Parent, Sub and the Company have caused this Agreement
to be signed by their respective  officers thereunto duly authorized,  all as of
the date first written above.

                                       COGNIZANT CORPORATION

                                       By: /s/ Kenneth S. Siegel

                                           -------------------------
                                           Name: Kenneth S. Siegel
                                           Title: Senior Vice President, General
                                           Counsel and Secretary

                                       WAC INC.

                                       By: /s/ Kenneth S. Siegel

                                           -------------------------
                                           Name: Kenneth S. Siegel
                                           Title: President

                                       WALSH INTERNATIONAL INC.

                                           By: /s/ Michael Hauck

                                           -------------------------
                                           Name: Michael Hauck
                                           Title: Chief Executive Officer


<PAGE>
                                                                       EXHIBIT A

                                     FORM OF

                              AMENDED AND RESTATED

                          CERTIFICATE OF INCORPORATION

                                       OF

                            WALSH INTERNATIONAL INC.

                                   ----------

                    (Pursuant to Sections 242 and 245 of the
                General Corporation Law of the State of Delaware)

                                   ----------


     WALSH INTERNATIONAL INC. (the "Corporation"),  a corporation  organized and
existing under the laws of the State of Delaware, hereby certifies as follows:

     1. The name of the Corporation is WALSH  INTERNATIONAL INC. The Corporation
was originally incorporated under the same name, and the original Certificate of
Incorporation  of the  Corporation  was  filed  with the  Secretary  of State of
Delaware on April 27, 1988.

     2. The text of the  Certificate of  Incorporation  of the  Corporation,  as
heretofore  amended,  is hereby  restated  and  further  amended  to read in its
entirety as follows:

     "FIRST: The name of the Corporation is

                            WALSH INTERNATIONAL INC.

     SECOND:  The address of the  registered  office of the  Corporation  in the
State of Delaware is No. 1209 Orange Street,  in the City of Wilmington,  County
of New Castle. The name of the Corporation's registered agent at such address is
The Corporation Trust Company.

     THIRD:  The purpose for which the Corporation is formed is to engage in any
lawful act or activity for which corporations may be organized under the General

Corporation Law of the State of Delaware.

     FOURTH:  The  total  number  of shares  of all  classes  of stock  that the
Corporation  shall have authority to issue is 25,000,000  shares,  consisting of
5,000,000  shares of Preferred Stock,  $1.00 par value (the "Preferred  Stock"),
and 20,000,000 shares of Common

<PAGE>

                                                                               2

     Stock, $.01 par value (the "Common Stock").  All  cross-references  in each
subdivision of this Article FOURTH refer to other paragraphs in such subdivision
unless otherwise indicated.

     The  following  is  a  statement  of  the  designations,  and  the  powers,
preferences  and rights,  and the  qualifications,  limitations or  restrictions
thereof, in respect of each class of stock of the Corporation:

                                       I.

                                 PREFERRED STOCK

         A. The  Preferred  Stock may be issued from time to time in one or more
series of any number of shares,  provided  that the  aggregate  number of shares
issued and not  cancelled  of any and all such series shall not exceed the total
number of shares of Preferred Stock hereinabove authorized.

         B.  Authority is hereby  vested in the Board of Directors  from time to
time to authorize the issuance of one or more series of Preferred  Stock and, in
connection with the creation of such series, to fix by resolution or resolutions
providing for the issue of shares thereof the designations,  powers, preferences
and  relative,  participating,   optional  or  other  special  rights,  and  the
qualifications,  limitations or restrictions thereof, of such series, including,
without limitation, the following:

              1. The maximum number of shares to constitute  such series and the
distinctive  designation  thereof and the stated value thereof if different than
the par value thereof;

              2. Whether the shares of such series shall have voting rights,  in
addition to any voting  rights  provided  by law,  and, if so, the terms of such
voting rights;

              3. The dividend  rate,  if any, on the shares of such series,  the
conditions and dates upon which such dividends shall be payable,  the preference
or relation  which such  dividends  shall bear to the  dividends  payable on any
other class or classes or on any other series of capital stock, and whether such
dividend shall be cumulative or non-cumulative;

              4.  Whether  the  shares  of  such  series  shall  be  subject  to
redemption by the  Corporation,  and, if made subject to redemption,  the times,
prices and other terms and conditions of such redemption;

              5. The  rights of the  holders of shares of such  series  upon the
liquidation, dissolution or winding up of the Corporation;

              6.  Whether or not the shares of such  series  shall be subject to
the  operation of a retirement  or sinking  fund,  and, if so, the extent to and
manner in which any such  retirement  or  sinking  fund  shall be applied to the
purchase or redemption of the shares of

<PAGE>

                                                                               3

such series for  retirement  or to other  corporate  purposes  and the terms and
provisions relative to the operation thereof;

              7. Whether or not the shares of such series  shall be  convertible
into, or exchangeable for, shares of stock of any other class or classes,  or of
any other series of the same class, and if so convertible or  exchangeable,  the
price or prices or the rate or rates of  conversion  or exchange and the method,
if any, of adjusting the same;

              8. The limitations and restrictions, if any, to be effective while
any shares of such series are  outstanding  upon the payment of dividends or the
making of other  distributions  on, and upon the  purchase,  redemption or other
acquisition  by the  Corporation  of,  the  Common  Stock or any other  class or
classes of stock of the Corporation  ranking junior to the shares of such series
either as to dividends or upon liquidation;

              9. The  conditions or  restrictions,  if any, upon the creation of
indebtedness  of the  Corporation  or upon  the  issue of any  additional  stock
(including  additional  shares of such  series or of any other  series or of any
other  class)  ranking on a parity with or prior to the shares of such series as
to dividends or distribution  of assets on  liquidation,  dissolution or winding
up; and

              10. Any other preference and relative, participating,  optional or
other  special  rights,  and the  qualifications,  limitations  or  restrictions
thereof, as shall not be inconsistent with this Article FOURTH.

<PAGE>

                                                                               4

                                       II.

                                  COMMON STOCK

     All shares of Common Stock shall be identical and shall entitle the holders
thereof to the same rights and privileges.

         (a)  Dividends.  When and as  dividends  are  declared  upon the Common
Stock,  whether  payable  in cash,  in  property  or in  shares  of stock of the
Corporation,  the holders of Common  Stock  shall be entitled to share  equally,
share for share, in such dividends.

         (b) Voting Rights.  Except as otherwise provided by law, each holder of
Common Stock shall be entitled to one vote per share.

         (c)  Liquidation.  In the  event  of any  liquidation,  dissolution  or
winding up of the Corporation,  whether voluntary or involuntary,  after payment
shall have been made to holders of Preferred  Stock of the full amounts to which
they may respectively be entitled as provided for herein,  the holders of Common
Stock shall be entitled,  to the exclusion of the holders of Preferred Stock, to
share ratably  according to the number of shares of Common Stock held by them in
all  remaining  assets of the  Corporation  available  for  distribution  to its
stockholders. Neither the merger or consolidation of another corporation into or
with the  Corporation,  nor the sale,  transfer or lease of all or substantially
all  the  assets  of the  Corporation,  shall  be  deemed  to be a  liquidation,
dissolution or winding up of the Corporation.

     FIFTH:  Election of  directors  of the  Corporation  need not be by written
ballot, unless and to the extent provided in the By-laws of the Corporation.

     SIXTH:  No person  shall be  personally  liable to the  Corporation  or its
stockholders  for monetary  damages for breach of fiduciary  duty as a director;
provided, however, that the foregoing shall not eliminate or limit the liability
of a  director  (a) for any  breach of the  director's  duty of  loyalty  to the
Corporation or its stockholders,  (b) for acts or omissions not in good faith or
which involve  intentional  misconduct or a knowing  violation of law, (c) under
Section 174 of the General  Corporation  Law of the State of Delaware or (d) for
any transaction from which the director derived an improper personal benefit.

     For the purposes of this Article SIXTH, "fiduciary duty as directors" shall
include any fiduciary duty arising out of serving at the  Corporation's  request
as a director of another corporation, partnership, joint venture, trust or other
enterprise,  and any liability to the  Corporation in its capacity as a security
holder,  partner,  beneficiary,  creditor  or  investor  of or in any such other
corporation, partnership, joint venture, trust or other enterprise.

     Each of the rights  conferred  by this  Article  SIXTH  shall be a contract
right and any repeal or amendment of the  provisions of this Article SIXTH shall
not adversely  affect any right  hereunder of any person existing at the time of
such repeal or amendment with respect to any act or omission  occurring prior to
the time of such repeal or amendment, and, further, such

<PAGE>

                                                                               5

repeal or amendment shall not apply to any proceeding,  irrespective of when the
proceeding is  initiated,  arising from the service of such person prior to such
repeal or amendment.

     SEVENTH:  The  Corporation  shall be  subject to the  following  provisions
regarding indemnification:

                                       I.

                    INDEMNIFICATION OF DIRECTORS AND OFFICERS

     A. Right to  Indemnification.  The  Corporation  shall  indemnify  and hold
harmless,  to the fullest  extent  permissible  under  Delaware law, as the same
exists or may  hereafter  exist in the future,  each person who was or is made a
party  or is  threatened  to be made a party  or is  otherwise  involved  in any
threatened,  pending or completed action, suit or proceeding,  whether formal or
informal,  whether of a civil, criminal,  administrative or investigative nature
(hereinafter a "proceeding"), by reason of the fact that he is or was a director
or  officer  of the  Corporation,  or is or was  serving  at the  request of the
Corporation as a director or officer of another corporation,  partnership, joint
venture,  trust  or  other  enterprise,  against  expenses  (including,  without
limitation,  attorney's fees),  judgments,  fines and amounts paid in settlement
actually  and  reasonably  incurred  by him,  if he acted in good faith and in a
manner he reasonably  believed to be in or not opposed to the best  interests of
the Corporation  and with respect to any criminal  action or proceeding,  had no
reasonable cause to believe his conduct unlawful and such indemnification  shall
continue  as to a person who has ceased to be a  director  or officer  and shall
inure  to  the  benefit  of  his  heirs,  executors,  administrators  and  legal
representatives.  The  Corporation  shall be required to indemnify a director or
officer, in accordance with this Section I of this Article SEVENTH in connection
with a  proceeding  initiated  by  such  person  only  if  such  proceeding  was
authorized by the Board of Directors of the Corporation.

     B.  Prepayment of Expenses.  The  Corporation  shall pay expenses  actually
incurred by a director or officer in connection  with any  proceeding in advance
of its final disposition; provided, however, that if Delaware law then requires,
the payment of such expenses incurred by a director or officer in advance of the
final  disposition  of a  proceeding  shall be made  only upon  delivery  to the
Corporation of an undertaking,  by or on behalf of such director or officer,  to
repay all amounts so advanced if it shall  ultimately  be  determined  that such
director or officer is not entitled to be indemnified under this Article SEVENTH
or otherwise.

     C. Claims.  If a claim under  paragraph A of this Section I of this Article
SEVENTH  is not paid in full by the  Corporation  within 30 days after a written
claim  has  been  received  by the  Corporation,  the  claimant  may at any time
thereafter  bring suit against the  Corporation  to recover the unpaid amount of
the claim and, if successful in whole or in part, the claimant shall be entitled
to be paid also the expense of  prosecuting  such claim.  Neither the failure of
the Corporation (including its Board of Directors, independent legal counsel, or
its  stockholders)  to have made a  determination  that  indemnification  of the
claimant is  permissible in the  circumstances  because the claimant has met the
applicable  standard  of conduct,  if any,  nor an actual  determination  by the
Corporation (including its Board of Directors, independent legal

<PAGE>

                                                                               6

counsel,  or its  shareholders)  that the  claimant  has not met the standard of
conduct,  shall be a defense  to the  action or  create a  presumption  that the
claimant  has  not  met  the  standard  of  conduct.  In any  such  action,  the
Corporation  shall have the burden of proving  that the  director or officer was
not  entitled to the  requested  indemnification  or payment of  expenses  under
applicable law.

                                       II.

                     INDEMNIFICATION OF EMPLOYEES AND AGENTS

     The  Corporation  may, in the  discretion  of the Board of Directors of the
Corporation,  provide indemnification to employees and agents of the Corporation
to the fullest extent permissible under Delaware law.

                                      III.

                               GENERAL PROVISIONS

     A.  Expenses  as a  Witness.  To the  extent  that any  director,  officer,
employee  or  agent of the  Corporation,  is by  reasons  of such  position,  or
position with another entity at the request of the Corporation, a witness in any
action,  suit or  proceeding,  he shall be  indemnified  against  all  costs and
expenses actually and reasonably  incurred by him or on his behalf in connection
therewith.

     B. Insurance. The Corporation shall have the power to purchase and maintain
insurance on behalf of any person who is or was a director, officer, employee or
agent of the Corporation, or is or was serving at the request of the Corporation
as a director,  officer, employee or agent of another corporation,  partnership,
joint venture,  trust or other enterprise against any liability asserted against
him and  incurred by him in any such  capacity,  or arising out of his status as
such,  whether  or not the  Corporation  would have the power to  indemnify  him
against such liability under this Article SEVENTH.

     C. Indemnity Agreements. The Corporation may enter into agreements with any
director,   officer,  employees  or  agent  of  the  Corporation  providing  for
indemnification to the fullest extent permissible under Delaware law.

     D. Separability.  Each and every paragraph, sentence, term and provision of
this  Article  SEVENTH  is  separate  and  distinct,  so that if any  paragraph,
sentence,  term or provision hereof shall be held to be invalid or unenforceable
for any  reason,  such  invalidity  or  unenforceability  shall not  affect  the
validity or unenforceability of any other paragraph, sentence, term or provision
hereof. To the extent required,  any paragraph,  sentence,  term or provision of
this  Article  SEVENTH may be modified by a court of competent  jurisdiction  to
preserve  its  validity  and  to  provide  the  claimant  with,  subject  to the
limitations  set forth in this  Article  SEVENTH and any  agreement  between the
Corporation and claimant, the broadest possible indemnification  permitted under
applicable law.

<PAGE>

                                                                               7

     E. Contract Right.  Each of the rights  conferred on directors and officers
of the  Corporation  by  Section I of this  Article  SEVENTH  and on  directors,
officers,  employees  or  agents of the  Corporation  by  Section  III-A of this
Article  SEVENTH  shall be a contract  right and any repeal or  amendment of the
provisions  of this  Article  SEVENTH  shall  not  adversely  affect  any  right
hereunder of any person  existing at the time of such repeal or  amendment  with
respect to any act or  omission  occurring  prior to the time of such  repeal or
amendment,  and,  further,  such  repeal  or  amendment  shall  not apply to any
proceeding,  irrespective of when the proceeding is initiated,  arising from the
service of such person prior to such repeal or amendment.

     F.  Nonexclusivity.  The rights  conferred  on any  person by this  Article
SEVENTH  shall not be  exclusive of any other rights that any person may have or
hereafter  acquire  under  any  statute,  agreement,  vote  of  stockholders  or
disinterested  directors or the Certificate of  Incorporation  or the By-laws of
the Corporation or otherwise.

     G.  Other  Indemnification.   The  Corporation's  obligation,  if  any,  to
indemnify  any  person  who was or is  serving  at its  request  as a  director,
officer, employee or agent of another corporation,  partnership,  joint venture,
trust,  or other  enterprise  shall be  reduced by any  amount  such  person has
collected as  indemnification  from such other corporation,  partnership,  joint
venture, trust or other enterprise.

     EIGHTH: In furtherance and not in limitation of the powers conferred by the
laws of the State of  Delaware,  the Board of Directors  of the  Corporation  is
expressly  authorized and empowered to make,  alter or repeal the By-laws of the
Corporation,  subject to the power of the  stockholders  of the  Corporation  to
alter or repeal any By-laws made by the Board of Directors.

     NINTH: The Corporation reserves the right at any time and from time to time
to amend, alter,  change or repeal any provisions  contained in this Certificate
of  Incorporation,  and other provisions  authorized by the laws of the State of
Delaware  at the time in force may be added or  inserted,  in the  manner now or
hereafter  prescribed  by law, and all rights,  preferences  and  privileges  of
whatsoever  nature conferred upon  stockholders,  directors or any other persons
whomsoever by and pursuant to this  Certificate of  Incorporation in its present
form or as hereafter  amended are granted  subject to the right reserved in this
Article NINTH.

<PAGE>

                                                                               8

     IN WITNESS WHEREOF,  WALSH INTERNATIONAL INC. has caused its corporate seal
to be hereunto  affixed and this  certificate  to be signed by Michael A. Hauck,
its Chief Executive Officer,  who hereby acknowledges under penalties of perjury
that the facts herein stated are true and that this  certificate  is his act and
deed, this __ day of ________, 1998.

                                               WALSH INTERNATIONAL INC.

                                               By:__________________________
                                                  Michael A. Hauck
                                                  Chief Executive Officer

<PAGE>



                                                                       EXHIBIT C

                             Parent Exchange Ratios

Parent Common Stock Price                            Parent Exchange Ratio*

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

         $ 20.792                                             0.4362
           22.792                                             0.4272
           23.792                                             0.4228
           24.792                                             0.4183
           25.792                                             0.4139
           26.792                                             0.4094
           27.792                                             0.4050
           28.792                                             0.4006
           29.792                                             0.3962
           30.792                                             0.3918
           31.792                                             0.3874
           32.792                                             0.3830
           33.792                                             0.3786
           34.792                                             0.3743
           35.792                                             0.3699
           36.792                                             0.3656
           37.792                                             0.3613
           38.792                                             0.3571
           39.792                                             0.3529
           40.792                                             0.3488
           62.792                                             0.2750
           63.792                                             0.2727
           64.792                                             0.2704
           65.792                                             0.2682
           66.792                                             0.2661
           67.792                                             0.2639
           68.792                                             0.2618
           69.792                                             0.2596
           70.792                                             0.2575
           71.792                                             0.2554
           72.792                                             0.2533
           73.792                                             0.2512
           74.792                                             0.2491
           75.792                                             0.2471
           76.792                                             0.2450
           77.792                                             0.2429
           78.792                                             0.2409
           79.792                                             0.2388
           80.792                                             0.2368
           81.792                                             0.2347
           82.792                                             0.2327
- ----------

*    Parent  Exchange  Ratio to be  calculated  on the  basis of  straight  line
     interpolation  if Parent  Common Stock Price is between any two amounts set
     forth herein.

<PAGE>



                                                                       EXHIBIT D

                               IMS Representations

     SECTION 3.02.  Representations  and  Warranties of IMS. IMS  represents and
warrants to the Company as follows:

         (a) Organization, Standing and Corporate Power. Each of IMS and each of
IMS's "significant  subsidiaries" (within the meaning of Rule 1-02 of Regulation
S-X of the  SEC)  (collectively,  the  "IMS  Subsidiaries")  is duly  organized,
validly  existing and in good  standing  under the laws of the  jurisdiction  in
which it is organized  and has the  requisite  corporate  power and authority to
carry on its  business as now being  conducted.  Each of IMS and each of the IMS
Subsidiaries  is  duly  qualified  or  licensed  to do  business  and is in good
standing in each  jurisdiction  (domestic or foreign) in which the nature of its
business or the ownership or leasing of its properties makes such  qualification
or licensing necessary, other than in such jurisdictions where the failure to be
so qualified or licensed (individually or in the aggregate) could not reasonably
be expected to have a Material  Adverse Effect with respect to IMS. IMS has made
available  to the  Company  complete  and  correct  copies  of its  articles  of
incorporation and by-laws.

         (b) Capital Structure.  As of the Distribution  Record Date,  [relevant
number of shares of IMS capital stock as of such date to be inserted  below] the
authorized  capital  stock of IMS consists of  ___________  shares of IMS Common
Stock,  __________  shares of Series Common Stock,  $.01 per share, of IMS ("IMS
Series  Stock") and  __________  shares of preferred  stock,  par value $.01 per
share,  of IMS  ("IMS  Preferred  Stock").  As of the close of  business  on the
Distribution Record Date, [relevant numbers of shares of IMS capital stock as of
such date to be inserted  below] there were: (i)  _______________  shares of IMS
Common  Stock issued and  outstanding;  (ii)  ____________  shares of IMS Common
Stock held in the treasury of IMS; (iii) ___________  shares of IMS Common Stock
reserved for issuance  pursuant to IMS's stock option and stock  purchase  plans
(such plans, collectively, the "IMS Stock Plans"); (iv) __________ shares of IMS
Common Stock  issuable upon exercise of awarded but  unexercised  stock options;
and  (v)  ___________  shares  of  IMS  Series  Stock  or  IMS  Preferred  Stock
outstanding.  Except  as set  forth  above  and  except  for  shares  of  junior
participating  preferred stock issuable pursuant to the Rights Agreement,  dated
as of _______ __, 1998, between IMS and First Chicago Trust Company of New York,
as of the close of  business  on the  Distribution  Record  Date,  there were no
shares of capital stock or other equity  securities of IMS issued,  reserved for
issuance or outstanding. All outstanding shares of capital stock of IMS are, and
all shares  which may be issued as described  above will be, when  issued,  duly
authorized,  validly  issued,  fully paid and  nonassessable  and not subject to
preemptive rights.  There are no outstanding bonds,  debentures,  notes or other
indebtedness  or debt securities of IMS having the right to vote (or convertible
into, or exchangeable  for,  securities having the right to vote) on any matters
on which  stockholders of the IMS may vote.  Except as set forth above or in the
disclosure   schedule  delivered  by  IMS  to  the  Company  as  of  the  Record
Distribution  Date (the "IMS  Disclosure  Schedule"),  there are no  outstanding
securities,   options,   warrants,  calls,  rights,   commitments,   agreements,
arrangements  or undertakings of any kind to which IMS is a party or by which it
is bound  obligating  IMS to  issue,  deliver  or sell,  or cause to be  issued,
delivered or

<PAGE>

                                                                               2

sold, additional shares of capital stock or other equity or voting securities of
IMS or obligating IMS to issue,  grant,  extend or enter into any such security,
option, warrant, call, right, commitment, agreement, arrangement or undertaking.
There are no outstanding contractual obligations, commitments, understandings or
arrangements  of IMS to  repurchase,  redeem or  otherwise  acquire  or make any
payment in respect of any shares of capital stock of IMS.

     As of the Closing Date, all of the issued and outstanding  shares of common
stock of Sub will be owned by IMS free and clear of any lien.

         (c) Authority;  Noncontravention. IMS has all requisite corporate power
and  authority  to assume  all of the  rights and  obligations  of Parent  under
Agreement  and the Stock Option  Agreement and to  consummate  the  transactions
contemplated  hereby and thereby.  The  assumption  by IMS of all the rights and
obligations  of  Parent  under  each of this  Agreement  and  the  Stock  Option
Agreement by IMS and the  consummation by IMS of the  transactions  contemplated
hereby and thereby have been duly authorized by all necessary  corporate  action
on the part of IMS. This Agreement and the Stock Option Agreement  (assuming due
authorization,  execution  and  delivery by the  Company)  constitute  valid and
binding  obligations  of IMS,  enforceable  against it in accordance  with their
terms, subject to the effects of bankruptcy,  insolvency, fraudulent conveyance,
reorganization,  moratorium and other similar laws affecting  creditors'  rights
generally,  general equitable  principles (whether considered in a proceeding in
equity or at law) and an implied  covenant of good faith and fair  dealing.  The
assumption by IMS of all the rights and obligations of Parent under each of this
Agreement and the Stock Option  Agreement does not, and the  consummation by IMS
of the  transactions  contemplated  by this Agreement and compliance by IMS with
the  provisions  of this  Agreement  and the Stock  Option  Agreement  will not,
conflict  with,  or result in any breach or  violation  of, or default  (with or
without  notice  or lapse of time,  or both)  under,  or give rise to a right of
termination,  cancellation or acceleration  of, or a "put" right with respect to
any obligation under, or to a loss of a material benefit under, or result in the
creation of any Lien under,  (i) the certificate of  incorporation or by-laws of
IMS or any  subsidiary of IMS, (ii) any loan or credit  agreement,  note,  bond,
mortgage, indenture, lease or any other contract, agreement, instrument, permit,
concession,  franchise  or  license to which IMS or any  subsidiary  of IMS is a
party or by which any of their  respective  properties  or  assets  are bound or
(iii) subject to the  governmental  filings and other matters referred to in the
following sentence, any judgment, order, decree, statute, law, ordinance,  rule,
regulation or  arbitration  award  applicable to IMS or any subsidiary of IMS or
their respective  properties or assets,  other than, in the case of clauses (ii)
and (iii), any such conflicts, breaches, violations, defaults, rights, losses or
Liens that  individually or in the aggregate could not reasonably be expected to
have a Material Adverse Effect with respect to IMS. No consent,  approval, order
or authorization of, or registration,  declaration or filing with, or notice to,
any Governmental  Entity or any other third party is required by or with respect
to IMS in  connection  with  the  assumption  by  IMS of all of the  rights  and
obligations of Parent under this Agreement or the Stock Option  Agreement by IMS
or the  consummation by IMS of any of the  transactions  contemplated  hereby or
thereby,  except for (i) the filing of a premerger  notification and report form
under the HSR Act and the filing of such  applications  or notices by IMS as may
be required pursuant to merger control, antitrust, foreign investment or similar
laws or  regulations  in effect in Canada,  Germany  or Sweden or any  political
subdivision thereof, (ii)

<PAGE>

                                                                               3

the  filing  with the SEC and the NYSE of (A) the Form S-4 and (B) such  reports
under the Exchange Act as may be required in connection with this Agreement, the
Stock Option  Agreement and the  transactions  contemplated  hereby and thereby,
(iii) the filing of the Certificate of Merger with the Secretary of State of the
State of Delaware and  appropriate  documents  with the relevant  authorities of
other states in which the Company is  qualified to do business,  (iv) such other
consents,  approvals,  orders,  authorizations,   registrations,   declarations,
filings or notices as may be required under the "takeover" or "blue sky" laws of
various states and (v) such other consents,  approvals, orders,  authorizations,
registrations,  declarations, filings or notices the failure of which to make or
obtain,  individually  or in the aggregate,  could not reasonably be expected to
(x)  prevent  or  materially  delay  consummation  of the  Merger  or the  other
transactions  contemplated hereby or performance of IMS's obligations  hereunder
and under the Stock Option  Agreement or (y) have a Material Adverse Effect with
respect to IMS.

     (d) IMS SEC Documents.  IMS has filed with the SEC all reports,  schedules,
forms, statements and other documents required to be filed by it pursuant to the
Securities  Act and the Exchange Act  (collectively,  and in each case including
all exhibits  and  schedules  thereto and  documents  incorporated  by reference
therein,  the "IMS SEC Documents").  As of their  respective  dates, the IMS SEC
Documents  complied as to form in all material respects with the requirements of
the  Securities  Act or the Exchange  Act, as the case may be, and the rules and
regulations  of the  SEC  promulgated  thereunder  applicable  to  such  IMS SEC
Documents,  and none of the IMS SEC Documents  (including  any and all financial
statements  included therein) as of such dates contained any untrue statement of
a  material  fact or  omitted to state a  material  fact  required  to be stated
therein or necessary in order to make the  statements  therein,  in the light of
the  circumstances  under which they were made,  not  misleading.  Except to the
extent that  information  contained  in any IMS SEC Document has been revised or
superseded  by a later  filed IMS SEC  Document,  none of the IMS SEC  Documents
(including  any and all  financial  statements  included  therein)  contains any
untrue  statement of a material  fact or omits to state a material fact required
to be stated  therein or necessary in order to make the statements  therein,  in
the light of the circumstances under which they were made, not misleading.

     (e)  Information  Supplied.  None  of  the  information  supplied  or to be
supplied by IMS for inclusion or  incorporation by reference in (i) the Form S-4
will,  at the time the Form S-4 is filed with the SEC, at any time it is amended
or  supplemented  or at the time it becomes  effective under the Securities Act,
contain any untrue  statement  of a material  fact or omit to state any material
fact required to be stated therein or necessary to make the  statements  therein
not misleading or (ii) the Proxy  Statement will, at the date it is first mailed
to the  Company's  stockholders  or at the  time  of the  Stockholders  Meeting,
contain any untrue  statement  of a material  fact or omit to state any material
fact required to be stated  therein or necessary in order to make the statements
therein,  in the light of the  circumstances  under  which  they are  made,  not
misleading.  The Form S-4 will comply as to form in all material  respects  with
the requirements of the Securities Act and the rules and regulations promulgated
thereunder,  except  that  no  representation  is made by IMS  with  respect  to
statements  made or  incorporated  by  reference  therein  based on  information
supplied in writing by the Company  specifically  for inclusion or incorporation
by reference therein.


<PAGE>


                                                                       EXHIBIT E

                               IMS Exchange Ratio

If the IMS Common Stock Price is above the Base Price plus the Second Threshold,
the IMS Exchange Ratio shall be .2750  multiplied by the IMS Adjustment  Factor,
subject to a downward adjustment (the "Excess Ratio Adjustment") for each dollar
(or portion  thereof) by which the IMS Common Stock Price exceeds the Base Price
plus the Second  Threshold (the "Excess").  The Excess Ratio Adjustment shall be
as  specified  opposite  the  applicable  Excess in the table below  (subject to
straight  line  interpolation  (rounded to the nearest  1/10,000th)  between the
nearest two indicated Excess amounts to give effect to fractions of a dollar).

           Excess                               Excess Ratio Adjustment

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

            1.00                                              -.0024
            2.00                                              -.0046
            3.00                                              -.0068
            4.00                                              -.0090
            5.00                                              -.0111
            6.00                                              -.0133
            7.00                                              -.0154
            8.00                                              -.0175
            9.00                                              -.0196
           10.00                                              -.0217
           11.00                                              -.0238
           12.00                                              -.0259
           13.00                                              -.0280
           14.00                                              -.0301
           15.00                                              -.0321
           16.00                                              -.0342
           17.00                                              -.0362
           18.00                                              -.0383
           19.00                                              -.0403
           20.00                                              -.0424

By way of illustrating the foregoing, if the IMS Adjustment Factor is 1.1111 and
the Excess is $10.50, then the IMS Exchange Ratio would be .2802,  calculated as
follows:  (x)  .2750  multiplied  by  1.1111,  plus (y) one half of the  product
obtained by multiplying 1.1111 by - .0455 (i.e. the sum of -.0217 and -.0238).

<PAGE>

                                                                       EXHIBIT F

                               IMS Exchange Ratio

If the IMS  Common  Stock  Price  is below  the  Base  Price  minus  the  Second
Threshold,  the  IMS  Exchange  Ratio  shall  be  .3488  multiplied  by the  IMS
Adjustment  Factor,  subject  to an  upward  adjustment  (the  "Shortfall  Ratio
Adjustment")  for each dollar (or portion thereof) by which the Base Price minus
the Second Threshold exceeds the IMS Common Stock Price (the  "Shortfall").  The
Shortfall  Ratio  Adjustment  shall  be as  specified  opposite  the  applicable
Shortfall in the table below (subject to straight line interpolation (rounded to
the nearest  1/10,000th)  between the nearest two indicated Shortfall amounts to
give effect to fractions of a dollar).

          Shortfall                                  Shortfall Ratio Adjustment

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

            1.00                                               .0041
            2.00                                               .0083
            3.00                                               .0125
            4.00                                               .0168
            5.00                                               .0211
            6.00                                               .0254
            7.00                                               .0298
            8.00                                               .0342
            9.00                                               .0385
           10.00                                               .0429
           11.00                                               .0473
           12.00                                               .0518
           13.00                                               .0562
           14.00                                               .0606
           15.00                                               .0650
           16.00                                               .0695
           17.00                                               .0739
           18.00                                               .0784
           19.00                                               .0829
           20.00                                               .0873

By way of illustrating the foregoing, if the IMS Adjustment Factor is 1.1111 and
the Shortfall is $5.50,  then the IMS Exchange Ratio would be .4134,  calculated
as follows:  (x) .3488  multiplied  by 1.1111,  plus (y) one half of the product
obtained by multiplying 1.1111 by .0466 (i.e. the sum of .0211 and .0254).



                                                                     EXHIBIT 2.2



                             STOCK OPTION AGREEMENT

     STOCK OPTION AGREEMENT,  dated as of March 23, 1998 (the  "Agreement"),  by
and between Walsh International  Inc., a Delaware  corporation  ("Issuer"),  and
Cognizant Corporation, a Delaware corporation ("Grantee").

     WHEREAS,  Grantee,  Issuer  and WAC  Inc.,  a  Delaware  corporation  and a
wholly-owned  subsidiary of Grantee ("Sub"), are concurrently  herewith entering
into an Agreement  and Plan of Merger,  dated as of the date hereof (the "Merger
Agreement";  capitalized  terms not defined  herein  shall have the meanings set
forth in the Merger Agreement), providing for, among other things, the merger of
Sub with and into Issuer with Issuer as the surviving corporation; and

     WHEREAS,  as a condition to Grantee's  willingness to enter into the Merger
Agreement,  Grantee has requested that Issuer agree,  and Issuer has agreed,  to
grant Grantee the Option (as defined below);

     NOW,  THEREFORE,  in  consideration  of the  foregoing  and the  respective
representations,  warranties,  covenants and  agreements set forth herein and in
the Merger Agreement, Issuer and Grantee agree as follows:

     1. Grant of Option.  Subject to the terms and  conditions set forth herein,
Issuer hereby grants to Grantee an irrevocable option (the "Option") to purchase
up to 2,111,815 (as adjusted as set forth herein)  shares (the "Option  Shares")
of Common Stock, par value $.01 per share, of Issuer (the "Issuer Common Stock")
at a purchase price of $15.75 per Option Share (the "Purchase Price").

     2.  Exercise  of  Option.  (a) If  not in  material  breach  of the  Merger
Agreement,  Grantee may exercise the Option, in whole or in part, at any time or
from time to time  following  the  occurrence  of a Purchase  Event (as  defined
below) and until  termination of this  Agreement  pursuant to Section 15 hereof;
provided that, except as otherwise  provided herein,  the Option shall terminate
and be of no further  force and  effect  upon the  earliest  to occur of (i) the
Effective  Time of the Merger,  (ii) 12 months after the first  occurrence  of a
Purchase  Event  or  (iii)  termination  of the  Merger  Agreement  prior to the
occurrence of a Purchase Event.  Notwithstanding  the termination of the Option,
but subject to Section 15 hereof,  Grantee  shall be entitled to purchase  those
Option Shares with respect to which it has exercised the Option pursuant to this
Section 2(a) in accordance with the terms hereof prior to the termination of the
Option.  The  termination  of the Option  shall not affect any rights  hereunder
which by their terms extend beyond the date of such termination.

     (b) As used herein,  a "Purchase Event" means the termination of the Merger
Agreement  under any  circumstance  which  would  entitle  Grantee  or Issuer to
receive any fee from Issuer pursuant to Section 8.02(a) of the Merger Agreement,
provided, however, that the termination of the Merger Agreement (except pursuant
to Section  7.01(b)  thereof)  after the  occurrence  of any event  described in
Section 8.02(a)(i)(B)(x) thereof shall constitute a Purchase

<PAGE>

                                                                               2

Event hereunder  whether or not any event described in Section  8.02(a)(i)(B)(y)
of the Merger Agreement shall have occurred.

     (c) In the event  Grantee  wishes to exercise the Option,  it shall send to
Issuer a written  notice  (the date of which  being  herein  referred  to as the
"Notice  Date")  specifying  (i) the total number of Option Shares it intends to
purchase  pursuant to such  exercise  and (ii) a place and date not earlier than
three business days nor later than 20 business days from the Notice Date for the
closing of such  purchase  (the  "Closing";  and the date of such  Closing,  the
"Closing  Date");  provided  that the  Closing  shall  be held  only if (A) such
purchase  would not otherwise  violate or cause the violation of applicable  law
(including the HSR Act) and (B) no statute, rule,  regulation,  decree, order or
injunction shall have been  promulgated,  enacted,  entered into, or enforced by
any Governmental  Entity which prohibits delivery of the Option Shares,  whether
temporary,  preliminary or permanent; provided, however, that the parties hereto
shall  use their  best  efforts  to have any such  decree,  order or  injunction
vacated  or  reversed.  If the  Closing  cannot  be  consummated  by reason of a
restriction set forth in clause (A) or (B) above, notwithstanding the provisions
of Section 2(a), the Closing Date shall be within 20 business days following the
elimination of such restriction.

     3. Payment and Delivery of Certificates.  (a) On each Closing Date, Grantee
shall pay to Issuer in  immediately  available  funds by wire transfer to a bank
account designated by Issuer an amount equal to the Purchase Price multiplied by
the Option Shares to be purchased on such Closing Date.

     (b) At each  Closing,  simultaneously  with  the  delivery  of  immediately
available  funds as provided in Section 3(a),  Issuer shall deliver to Grantee a
certificate or  certificates  representing  the Option Shares to be purchased at
such  Closing,  which Option  Shares  shall be free and clear of all Liens,  and
Grantee shall  deliver to Issuer a letter  agreeing that Grantee shall not offer
to sell or otherwise  dispose of such Option  Shares in violation of  applicable
law or the  provisions  of this  Agreement.  If at the time of  issuance  of any
Option  Shares  pursuant to an exercise of all or part of the Option  hereunder,
Issuer  shall not have  redeemed  the  Rights,  or shall have issued any similar
securities,  then each Option Share issued  pursuant to such exercise shall also
represent a corresponding  Right or new rights with terms substantially the same
as and at least as  favorable  to  Grantee  as are  provided  under  the  Rights
Agreement or any similar agreement then in effect.

     (c)  Certificates  for the Option Shares delivered at each Closing shall be
endorsed with a restrictive legend which shall read substantially as follows:

               THE  TRANSFER OF THE STOCK  REPRESENTED  BY THIS  CERTIFICATE  IS
               SUBJECT TO RESTRICTIONS ARISING UNDER THE SECURITIES ACT OF 1933,
               AS AMENDED, AND PURSUANT TO THE TERMS OF A STOCK OPTION AGREEMENT
               DATED AS OF MARCH  23,  1998.  A COPY OF SUCH  AGREEMENT  WILL BE
               PROVIDED TO THE HOLDER HEREOF  WITHOUT CHARGE UPON RECEIPT BY THE
               ISSUER OF A WRITTEN REQUEST THEREFOR.

<PAGE>

                                                                               3

It is understood and agreed that (i) the reference to restrictions arising under
the  Securities  Act in the  above  legend  shall  be  removed  by  delivery  of
substitute certificate(s) without such reference if Grantee shall have delivered
to Issuer a copy of a letter from the staff of the SEC, or an opinion of counsel
in form and substance reasonably  satisfactory to Issuer and its counsel, to the
effect that such legend is not required for purposes of the  Securities  Act and
(ii) the  reference  to  restrictions  pursuant to this  Agreement  in the above
legend shall be removed by delivery of  substitute  certificate(s)  without such
reference if the Option  Shares  evidenced  by  certificate(s)  containing  such
reference  have been sold or  transferred  in compliance  with the provisions of
this  Agreement  under  circumstances  that do not require the retention of such
reference.

     4. Authorized Stock.  Issuer hereby represents and warrants to Grantee that
Issuer has taken all  necessary  corporate  and other  action to  authorize  and
reserve and to permit it to issue,  and, at all times from the date hereof until
the obligation to deliver Issuer Common Stock upon the exercise of the Option or
any Substitute Option (as hereinafter  defined)  terminates,  will have reserved
for issuance,  upon exercise of the Option or any Substitute  Option,  shares of
Issuer  Common Stock  necessary for Grantee to exercise the Option or Substitute
Option,  and Issuer will take all  necessary  corporate  action to authorize and
reserve for  issuance  all  additional  shares of Issuer  Common  Stock or other
securities which may be issued pursuant to Section 6 upon exercise of the Option
or  Substitute  Option.  The shares of Issuer Common Stock to be issued upon due
exercise of the Option or Substitute Option,  including all additional shares of
Issuer Common Stock or other  securities  which may be issuable upon exercise of
the Option or Substitute  Option  pursuant to Section 6, upon issuance  pursuant
hereto,  shall be duly and validly  issued,  fully paid and  nonassessable,  and
shall be delivered free and clear of all Liens,  including any preemptive rights
of any stockholder of Issuer.

     5. Purchase Not for Distribution. Grantee hereby represents and warrants to
Issuer  that any Option  Shares or other  securities  acquired  by Grantee  upon
exercise of the Option or Substitute Option will not be taken with a view to the
public distribution thereof and will not be transferred or otherwise disposed of
except  in a  transaction  registered  or  exempt  from  registration  under the
Securities Act.

     6. Adjustment upon Changes in Capitalization,  etc. (a) In the event of any
change  in  Issuer  Common  Stock  by  reason  of a  stock  dividend,  split-up,
recapitalization,  combination,  exchange of shares or similar transaction,  the
type and number of shares or securities  subject to the Option, and the Purchase
Price therefor,  shall be adjusted appropriately,  and proper provision shall be
made in the agreements governing such transaction, so that Grantee shall receive
upon  exercise of the Option the number and class of shares or other  securities
or property  that Grantee  would have received in respect of Issuer Common Stock
if the Option had been exercised  immediately  prior to such event or the record
date therefor,  as applicable.  If any additional  shares of Issuer Common Stock
are issued  after the date of this  Agreement at a price per share less than the
Purchase  Price,  the  number of shares of Issuer  Common  Stock  subject to the
Option shall be adjusted so that,  after such  issuance,  it equals 19.9% of the
number of shares of Issuer  Common  Stock then issued and  outstanding,  without
giving effect to any shares subject to or issued pursuant to the Option.

<PAGE>

                                                                               4

     (b) In  the  event  that  Issuer  shall  enter  into  an  agreement  (i) to
consolidate  with or merge into any  person,  other  than  Grantee or one of its
subsidiaries,  and shall not be the continuing or surviving  corporation of such
consolidation or merger, (ii) to permit any person, other than Grantee or one of
its  subsidiaries,  to merge into Issuer and Issuer shall be the  continuing  or
surviving corporation, but, in connection with such merger, the shares of Issuer
Common Stock  outstanding  immediately  prior to the consummation of such merger
shall be changed into or exchanged  for stock or other  securities  of Issuer or
any other person or cash or any other  property,  or the shares of Issuer Common
Stock  outstanding  immediately  prior to the  consummation of such merger shall
after such merger represent less than 50% of the outstanding  voting  securities
of  the  merged  company,  or  (iii)  to  sell  or  otherwise  transfer  all  or
substantially all of its assets to any person,  other than Grantee or one of its
subsidiaries,  then,  and in  each  such  case,  the  agreement  governing  such
transaction  shall make proper  provisions  so that the Option  shall,  upon the
consummation of any such transaction and upon the terms and conditions set forth
herein,  be  converted  into,  or  exchanged  for,  an option  (the  "Substitute
Option"),  at the election of Grantee,  of either (I) the Acquiring  Corporation
(as defined  below) or (II) any person that controls the  Acquiring  Corporation
(any  such  person  specified  in  clause  (I)  or  (II)  being  referred  to as
"Substitute Option Issuer").

     (c) The Substitute Option shall have the same terms as the Option; provided
that the exercise price  therefor and number of shares subject  thereto shall be
as set forth in this Section 6 and the repurchase  rights relating thereto shall
be as set forth in Section 8;  provided,  further,  that the  Substitute  Option
shall be  exercisable  immediately  upon  issuance  without the  occurrence of a
Purchase Event with respect to the  Substitute  Option;  and provided,  further,
that if the terms of the  Substitute  Option cannot,  for legal reasons,  be the
same  as the  Option  (subject  to the  variations  described  in the  foregoing
provisos),  such  terms  shall be as similar  as  possible  and in no event less
advantageous  to  Grantee.  Substitute  Option  Issuer  shall also enter into an
agreement with Grantee in substantially the same form as this Agreement (subject
to  the  variations  described  in  the  foregoing  provisos),  which  shall  be
applicable to the Substitute Option.

     (d) The Substitute Option shall be exercisable for such number of shares of
Substitute Common Stock (as defined below) as is equal to the Assigned Value (as
defined  below)  multiplied  by the number of shares of Issuer  Common Stock for
which the Option was theretofore  exercisable,  divided by the Average Price (as
defined  below),  rounded up to the nearest whole share.  The exercise price per
share of  Substitute  Common  Stock of the  Substitute  Option (the  "Substitute
Option  Price")  shall  then be  equal to the  Purchase  Price  multiplied  by a
fraction in which the  numerator is the number of shares of Issuer  Common Stock
for which the Option was  theretofore  exercisable  and the  denominator  is the
number of shares of Substitute  Common Stock for which the Substitute  Option is
exercisable.

     (e) In no event,  pursuant to any of the  foregoing  paragraphs,  shall the
Substitute  Option be  exercisable  for more than 19.9% of the  aggregate of the
shares  of  Substitute  Common  Stock  outstanding  prior  to  exercise  of  the
Substitute  Option. In the event that the Substitute Option would be exercisable
for more than 19.9% of the  aggregate  of the shares of  outstanding  Substitute
Common Stock but for the limitation in the first sentence of this Section

<PAGE>

                                                                               5

6(e), Substitute Option Issuer shall make a cash payment to Grantee equal to the
excess of (i) the value of the  Substitute  Option  without giving effect to the
limitation in the first sentence of this Section 6(e) over (ii) the value of the
Substitute Option after giving effect to the limitation in the first sentence of
this Section 6(e).  This difference in value shall be determined by a nationally
recognized investment banking firm selected by Grantee.

     (f) Issuer shall not enter into any  transaction  described in Section 6(b)
unless the  Acquiring  Corporation  and any person that  controls the  Acquiring
Corporation  assume in writing all the obligations of Issuer  hereunder and take
all other actions that may be necessary so that the provisions of this Agreement
are given full force and effect (including,  without limitation, any action that
may be  necessary so that the holders of the other shares of common stock issued
by Substitute  Option Issuer are not entitled to exercise any rights  comparable
to the Rights by reason of the issuance or exercise of the Substitute Option and
the shares of Substitute  Common Stock are  otherwise in no way  distinguishable
from or have lesser  economic  value than other shares of common stock issued by
Substitute  Option Issuer (other than any diminution in value resulting from the
fact, if applicable,  that the shares of Substitute  Common Stock are restricted
securities,  as defined in Rule 144 under the  Securities  Act or any  successor
provision)).

     (g) For purposes of this Agreement,  the following terms have the following
meanings:

          (1)  "Acquiring  Corporation"  means (i) the  continuing  or surviving
     corporation  of a  consolidation  or merger  with  Issuer  (if  other  than
     Issuer),  (ii)  Issuer in a merger in which  Issuer  is the  continuing  or
     surviving  corporation and (iii) the transferee of all or substantially all
     of Issuer's assets.

          (2)  "Assigned  Value" means the highest of (w) the price per share of
     Issuer  Common Stock at which a tender  offer or exchange  offer for Issuer
     Common  Stock  has  been  made  after  the  date  hereof  and  prior to the
     consummation  of the  consolidation,  merger or sale referred to in Section
     6(b),  (x)  the  price  per  share  to be paid by any  third  party  or the
     consideration  per share to received by holders of Issuer Common Stock,  in
     each case  pursuant  to the  agreement  with  Issuer  with  respect  to the
     consolidation,  merger or sale referred to in Section 6(b), (y) the highest
     closing  sales price per share for Issuer  Common  Stock quoted on the NYSE
     (or if such Issuer Common Stock is not quoted on the NYSE,  the highest bid
     price per share as quoted on the National Association of Securities Dealers
     Automated Quotation System or, if the shares of Issuer Common Stock are not
     quoted  thereon,  on the principal  trading market on which such shares are
     traded as reported  by a  recognized  source)  during the  12-month  period
     immediately  preceding  the  consolidation,  merger or sale  referred to in
     Section  6(b) and (z) in the event the  transaction  referred to in Section
     6(b) is a sale of all or substantially  all of Issuer's  assets,  an amount
     equal  to (i)  the sum of the  price  paid in such  sale  for  such  assets
     (including  assumed  liabilities)  and  the  current  market  value  of the
     remaining  assets of  Issuer,  as  determined  by a  nationally  recognized
     investment banking firm selected by Grantee,  divided by (ii) the number of
     shares of Issuer Common Stock outstanding at such time. In the event that a
     tender offer or exchange offer is made for Issuer Common Stock or an

<PAGE>

                                                                               6

     agreement  is  entered  into  for  a  merger  or  consolidation   involving
     consideration  other  than  cash,  the  value  of the  securities  or other
     property  issuable or deliverable in exchange for Issuer Common Stock shall
     be determined by a nationally  recognized  investment banking firm selected
     by Grantee.

          (3) "Average Price" means the average closing sales price per share of
     a  share  of  Substitute  Common  Stock  quoted  on the  NYSE  (or if  such
     Substitute  Common  Stock is not quoted on the NYSE,  the highest bid price
     per share as quoted  on the  National  Association  of  Securities  Dealers
     Automated Quotation System or, if the shares of Substitute Common Stock are
     not quoted  thereon,  on the principal  trading market on which such shares
     are traded as reported by a recognized  source) for the twenty trading days
     immediately  preceding the fifth  business day prior to the  consolidation,
     merger or sale in question,  but in no event higher than the closing  price
     of the  shares  of  Substitute  Common  Stock  on the  day  preceding  such
     consolidation, merger or sale; provided that if Substitute Option Issuer is
     Issuer,  the Average  Price shall be  computed  with  respect to a share of
     common  stock  issued by Issuer,  the person  merging into Issuer or by any
     company which controls such person, as Grantee may elect.

          (4)  "Substitute  Common  Stock" means the shares of capital stock (or
     similar equity  interest) with the greatest  voting power in respect of the
     election of directors (or persons  similarly  responsible for the direction
     of the business and affairs) of the Substitute Option Issuer.

     7.  Repurchase  of  Option  and  Option  Shares.  (a)  Notwithstanding  the
provisions  of Section  2(a),  but  subject  to  Section 15 hereof,  at any time
commencing  upon the first  occurrence of a Repurchase  Event (as defined below)
and ending 12 months after the  occurrence of a Purchase  Event,  Issuer (or any
successor entity thereof) shall:

          (i) at the request of Grantee,  repurchase from Grantee the Option (if
     and to the  extent  not  previously  terminated)  at a price  equal  to the
     excess,  if any, of (x) the  Applicable  Price (as defined below) as of the
     Section 7 Request  Date (as  defined  below)  for a share of Issuer  Common
     Stock over (y) the  Purchase  Price  (subject  to  adjustment  pursuant  to
     Section  6(a)),  multiplied  by the number of shares of Issuer Common Stock
     with  respect  to which the  Option  has not been  exercised  (the  "Option
     Repurchase Price"); and

          (ii) at the  request of an owner of Option  Shares  from time to time,
     repurchase  such number of Option Shares as such owner shall designate at a
     price  equal to the  Applicable  Price as of the  Section  7  Request  Date
     multiplied by the number of Option Shares  requested to be  repurchased  by
     such owner (the "Option Share Repurchase Price").

     (b) If Grantee or an owner of Option Shares exercises its rights under this
Section 7, Issuer  shall,  within 10  business  days after the Section 7 Request
Date, pay the Option  Repurchase Price or Option Share Repurchase  Price, as the
case may be, in immediately

<PAGE>

                                                                               7

available  funds, and Grantee or such owner, as the case may be, shall surrender
to Issuer the Option or Option Shares, as the case may be.

     (c) For purposes of this Agreement,  the following terms have the following
meanings:

          (i) "Applicable  Price," as of any date,  means the highest of (A) the
     highest price per share at which a tender offer or exchange  offer has been
     made for  shares of Issuer  Common  Stock  after the date  hereof and on or
     prior to such date,  (B) the price per share to be paid by any third  party
     for  shares of Issuer  Common  Stock or the  consideration  per share to be
     received by holders of Issuer  Common  Stock,  in each case  pursuant to an
     agreement  for a merger  or other  business  combination  transaction  with
     Issuer  entered  into on or prior to such date or (C) the  highest  closing
     sales  price  per share of Issuer  Common  Stock  quoted on the NYSE (or if
     Issuer  Common  Stock is not quoted on the NYSE,  the highest bid price per
     share as quoted on the National Association of Securities Dealers Automated
     Quotations  System or, if the shares of Issuer  Common Stock are not quoted
     thereon, on the principal trading market on which such shares are traded as
     reported by a recognized source) during the 60 business days preceding such
     date.  If the  consideration  to be offered,  paid or received  pursuant to
     either of the foregoing clauses (A) or (B) shall be other than in cash, the
     value  of such  consideration  shall  be  determined  in good  faith  by an
     independent  nationally  recognized  investment  banking  firm  selected by
     Grantee and reasonably  acceptable to Issuer,  which determination shall be
     conclusive for all purposes of this Agreement.

          (ii)  "Repurchase  Event"  means the  occurrence  of a Purchase  Event
     followed by the consummation of any transaction the proposal of which would
     constitute a Transaction Proposal.

          (iii)  "Section 7 Request  Date" means the date on which Grantee or an
     owner of Option Shares exercises its rights under this Section.

     8. Repurchase of Substitute  Option.  (a) At any time after issuance of the
Substitute  Option  and  prior  to  the  expiration  of the  Substitute  Option,
Substitute Option Issuer (or any successor entity thereof) shall:

          (i) at the request of Grantee,  repurchase from Grantee the Substitute
     Option (if and to the extent not previously terminated) at a price equal to
     the excess,  if any, of (x) the Highest  Closing  Price as of the Section 8
     Request Date (as defined below) for a share of Substitute Common Stock over
     (y) the Purchase  Price  (subject to adjustment  pursuant to Section 6(a)),
     multiplied by the number of shares of Substitute  Common Stock with respect
     to which the  Substitute  Option has not been  exercised  (the  "Substitute
     Option Repurchase Price"); and

          (ii) at the request of an owner of shares of  Substitute  Common Stock
     issued upon exercise of the Substitute  Option,  repurchase  such number of
     shares of Substitute

<PAGE>

                                                                               8

     Common Stock as such owner shall  designate at a price equal to the Highest
     Closing Price as of the Section 8 Request Date  multiplied by the number of
     shares of Substitute Common Stock requested to be repurchased by such owner
     (the "Substitute Share Repurchase Price").

     (b) If Grantee or an owner of shares of Substitute Common Stock issued upon
exercise of the  Substitute  Option  exercises  its rights under this Section 8,
Substitute  Option  Issuer  shall,  within 10 business  days after the Section 8
Request Date, pay the Substitute  Option  Repurchase  Price or Substitute  Share
Repurchase  Price,  as the case may be,  in  immediately  available  funds,  and
Grantee or such owner,  as the case may be, shall surrender to Issuer the Option
or shares of Substitute Common Stock, as the case may be.

     (c) For purposes of this Agreement,  the following terms have the following
meanings:

          (i) "Highest  Closing Price" means the highest closing sales price for
     shares of Substitute  Common Stock quoted on the NYSE (or if the Substitute
     Common Stock is not quoted on the NYSE,  the highest bid price per share as
     quoted  on  the  National   Association  of  Securities  Dealers  Automated
     Quotations  System or, if the  shares of  Substitute  Common  Stock are not
     quoted  thereon,  on the principal  trading market on which such shares are
     traded as reported by a  recognized  source)  during the  six-month  period
     preceding the Section 8 Request Date; and

          (ii)  "Section 8 Request  Date" means the date on which  Grantee or an
     Owner exercises its rights under this Section.

     9. Mandatory Repurchase of Option. (a) In the event that any person who has
participated in a Purchase Event enters into any agreement or understanding with
Grantee with respect to Grantee's  exercise of, or its election not to exercise,
any of Grantee's  rights set forth in Section 2 or 7 of this Agreement,  Grantee
shall, by written notice to Issuer,  require that Issuer repurchase,  and Issuer
shall repurchase, (I) the Option and (II) all (but not less than all) the shares
of Issuer Common Stock purchased by Grantee pursuant hereto; provided,  however,
that the parties shall not be obligated to effect such  mandatory  repurchase if
the Board of Directors of Issuer  determines,  after having  consulted  with and
considered the written advice of outside counsel, that such mandatory repurchase
would  cause the members of the Board of  Directors  to breach  their  fiduciary
duties;  and  provided,  further,  that any such  determination  by the Board of
Directors  of Issuer  shall not operate to limit  Grantee's  rights  pursuant to
Section 7 hereof. Issuer shall:

          (i)  repurchase  from  Grantee  the  Option  (if and to the extent not
     previously  terminated) at a price equal to the excess,  if any, of (x) the
     Section 9  Applicable  Price (as defined  below) as of the Section 9 Notice
     Date (as  defined  below) for a share of Issuer  Common  Stock over (y) the
     Purchase Price (subject to adjustment pursuant to Section 6(a)), multiplied
     by the number of shares of Issuer  Common  Stock with  respect to which the
     Option has not been  exercised (the "Section 9 Option  Repurchase  Price");
     and

<PAGE>

                                                                               9

          (ii)  repurchase  such  number of Option  Shares as an owner of Option
     Shares shall  designate at a price equal to the Section 9 Applicable  Price
     as of the Section 9 Notice Date  multiplied  by the number of Option Shares
     requested  to be  repurchased  by such owner (the  "Section 9 Option  Share
     Repurchase Price").

     (b)  In the  event  that  Issuer  is,  as a  result  of law or  regulation,
prohibited from  performing any of its obligations  under this Section 9, Issuer
shall not thereafter  enter into any  acquisition  transaction  unless the other
parties thereto agree to assume Issuer's obligations under this Section 9 to the
extent not  previously  performed.  The foregoing  sentence shall not operate to
limit or waive any remedies Grantee may have against Issuer for Issuer's failure
to perform its obligations under this Section 9.

     (c) If Grantee or an owner of Option Shares exercises its rights under this
Section 9,  Issuer  shall,  within 10  business  days after the Section 9 Notice
Date,  pay the  Section 9 Option  Repurchase  Price or  Section  9 Option  Share
Repurchase  Price,  as the case may be,  in  immediately  available  funds,  and
Grantee or such owner,  as the case may be, shall surrender to Issuer the Option
or Option Shares, as the case may be.

     (d) For purposes of this Agreement,  the following terms have the following
meanings:

          (i) "Section 9 Applicable Price," as of any date, means the highest of
     (A) the highest  price per share at which a tender offer or exchange  offer
     has been made for shares of Issuer  Common  Stock after the date hereof and
     on or prior to such  date,  (B) the price per share to be paid by any third
     party for shares of Issuer Common Stock or the  consideration  per share to
     be received by holders of Issuer Common Stock,  in each case pursuant to an
     agreement  for a merger  or other  business  combination  transaction  with
     Issuer  entered  into on or prior to such date or (C) the  highest  closing
     sales  price  per share of Issuer  Common  Stock  quoted on the NYSE (or if
     Issuer  Common  Stock is not quoted on the NYSE,  the highest bid price per
     share as quoted on the National Association of Securities Dealers Automated
     Quotations  System or, if the shares of Issuer  Common Stock are not quoted
     thereon, on the principal trading market on which such shares are traded as
     reported by a recognized source) during the 60 business days preceding such
     date.  If the  consideration  to be offered,  paid or received  pursuant to
     either of the foregoing clauses (A) or (B) shall be other than in cash, the
     value  of such  consideration  shall  be  determined  in good  faith  by an
     independent  nationally  recognized  investment  banking  firm  selected by
     Grantee and reasonably  acceptable to Issuer,  which determination shall be
     conclusive for all purposes of this Agreement.

          (ii)  "Section 9 Notice  Date"  means the date on which  Grantee or an
     owner of Option Shares exercises its rights under this Section.

          (iii) "Section 9 Repurchase  Consideration"  means the aggregate price
     paid by Issuer to Grantee under the terms of this Section 9.

<PAGE>

                                                                              10

     10. Registration Rights. Issuer shall, if requested by Grantee or any owner
of Option Shares  (collectively with Grantee, the "Owners") at any time and from
time to time  within  three  years  of the  first  exercise  of the  Option,  as
expeditiously  as possible  prepare and file up to two  registration  statements
under the  Securities Act if such  registration  is necessary in order to permit
the sale or other  disposition of any or all shares of securities that have been
acquired  by or are  issuable  to such  Owners  upon  exercise  of the Option in
accordance with the intended method of sale or other disposition  stated by such
Owners,  including  a "shelf"  registration  statement  under Rule 415 under the
Securities Act or any successor provision, and Issuer shall use its best efforts
to qualify such shares or other securities under any applicable state securities
laws.  Issuer shall use all reasonable  efforts to cause each such  registration
statement  to become  effective,  to obtain  all  consents  or  waivers of other
parties  which are  required  therefor and to keep such  registration  statement
effective  for  such  period  not in  excess  of 180  days  from  the  day  such
registration statement first becomes effective as may be reasonably necessary to
effect such sale or other  disposition.  The obligations of Issuer  hereunder to
file a registration statement and to maintain its effectiveness may be suspended
for one or more periods of time not  exceeding  30 days in the  aggregate if the
Board of  Directors  of Issuer  shall  have  determined  that the filing of such
registration  statement or the  maintenance of its  effectiveness  would require
disclosure of nonpublic  information  that would materially and adversely affect
Issuer. Any registration statement prepared and filed under this Section 10, and
any sale covered  thereby,  shall be at Issuer's expense except for underwriting
discounts  or  commissions,  brokers'  fees and the fees  and  disbursements  of
Owners'  counsel  related  thereto.  The Owners  shall  provide all  information
reasonably requested by Issuer for inclusion in any registration statement to be
filed hereunder.  If during the time period referred to in the first sentence of
this Section 10 Issuer effects a registration under the Securities Act of Issuer
Common Stock for its own account or for any other  stockholders of Issuer (other
than on Form S-4 or Form S-8, or any successor  form), it shall allow the Owners
the right to participate in such registration,  and such participation shall not
affect the  obligation of Issuer to effect two  registration  statements for the
Owners under this Section 10;  provided  that, if the managing  underwriters  of
such  offering  advise  Issuer in writing  that in their  opinion  the number of
shares of Issuer  Common  Stock  requested  to be included in such  registration
exceeds the number which can be sold in such offering,  Issuer shall include the
shares  requested to be included  therein by the Owners pro rata with the shares
intended to be included  therein by Issuer.  In connection with any registration
pursuant to this Section 10,  Issuer and the Owners shall provide each other and
any  underwriter  of the offering with  customary  representations,  warranties,
covenants,   indemnification   and   contribution   in   connection   with  such
registration.

     11. Listing.  If Issuer Common Stock or any other securities to be acquired
upon  exercise  of the  Option  are then  listed on the NYSE,  Issuer,  upon the
request of any Owner,  will promptly file an  application  to list the shares of
Issuer  Common Stock or other  securities  to be acquired  upon  exercise of the
Option  on the NYSE and will use its best  efforts  to obtain  approval  of such
listing as soon as practicable.

     12. Limitation of Grantee Profit. (a)  Notwithstanding  any other provision
herein,  in no event shall  Grantee's  Total  Profit (as defined  below)  exceed
$5,550,000,  and, if it otherwise would exceed such amount, Grantee, at its sole
discretion, shall either (i) reduce the

<PAGE>

                                                                              11

number of shares subject to the Option,  (ii) deliver to Issuer for cancellation
shares of Issuer Common Stock (or other securities into which such Option Shares
are converted or exchanged),  (iii) pay cash to Issuer,  or (iv) any combination
of the  foregoing,  so that Grantee's  actually  realized Total Profit shall not
exceed $5,550,000 after taking into account the foregoing actions.

     (b) For purposes of this  Agreement,  "Total  Profit"  shall mean:  (i) the
aggregate  amount of (A) the  excess  of (x) the net cash  amounts  received  by
Grantee  pursuant  to a sale of Option  Shares  (or  securities  into which such
shares are  converted or exchanged)  to any  unaffiliated  third party within 12
months  after the  exercise  of the  Option,  over (y) the  Grantee's  aggregate
purchase  price  for such  Option  Shares  (or other  securities),  plus (B) all
amounts  received  by  Grantee  on the  transfer  of the  Option,  plus  (C) all
equivalent amounts with respect to the Substitute  Option,  plus (D) all amounts
received by Grantee pursuant to Section 8.02(a) and (b) of the Merger Agreement,
minus  (ii) all  amounts  of cash  previously  paid to Issuer  pursuant  to this
Section 12 plus the value of the Option Shares (or other securities)  previously
delivered to Issuer for cancellation pursuant to this Section 12.

     (c) Notwithstanding any other provision of this Agreement,  nothing in this
Agreement shall affect the ability of Grantee to receive,  nor relieve  Issuer's
obligation  to pay, any payment  provided  for in Section  8.02(a) or (b) of the
Merger  Agreement;  provided that if and to the extent the Total Profit received
by Grantee would exceed $5,550,000  following  receipt of such payment,  Grantee
shall be obligated  to comply with the terms of Section  12(a) within 30 days of
the latest of (i) the date of receipt of such payment,  (ii) the date of receipt
of the net cash by Grantee  pursuant to the sale of Option Shares (or securities
into which such Option Shares are  converted or  exchanged) to any  unaffiliated
party  within 12 months  after the  exercise of this Option with respect to such
Option  Shares,  (iii) the date of receipt of net cash from  disposition  of the
Option and (iv) the date of receipt of equivalent  amounts  pursuant to the sale
of the  Substitute  Option  or  shares  of  Substitute  Common  Stock  (or other
securities into which such Substitute Common Stock is converted or exchanged).

     (d) For  purposes of Section  12(a) and clause (ii) of Section  12(b),  the
value of any Option  Shares  delivered to Issuer shall be the Assigned  Value of
such Option  Shares and the value of any  Substitute  Common Stock  delivered to
Issuer shall be the Highest Closing Price of such Substitute Common Stock.

     13. Loss, Theft, Etc. of Agreement.  This Agreement (and the Option granted
hereby)  are  exchangeable,  without  expense,  at the option of  Grantee,  upon
presentation  and surrender of this Agreement at the principal  office of Issuer
for other Agreements providing for Options of different  denominations entitling
the holder  thereof to  purchase in the  aggregate  the same number of shares of
Issuer Common Stock purchasable hereunder. The terms "Agreement" and "Option" as
used herein  include  any other  Agreements  and related  Options for which this
Agreement  (and the Option  granted  hereby) may be  exchanged.  Upon receipt by
Issuer of evidence reasonably satisfactory to it of the loss, theft, destruction
or mutilation of this Agreement, and (in the case of loss, theft or destruction)
of reasonably satisfactory indemnification,  and upon surrender and cancellation
of this Agreement, if mutilated, Issuer will execute and deliver a new Agreement
of like tenor and date. Any such new Agreement executed

<PAGE>

                                                                              12

and delivered shall constitute an additional  contractual obligation on the part
of Issuer, whether or not the Agreement so lost, stolen,  destroyed or mutilated
shall at any time be enforceable by anyone.

     14. Miscellaneous. (a) Expenses. Except as otherwise provided in Section 10
hereof or in the Merger Agreement, each of the parties hereto shall bear and pay
all costs and expenses  incurred by it or on its behalf in  connection  with the
transactions  contemplated  hereunder,  including  fees and  expenses of its own
financial consultants, investment bankers, accountants and counsel.

     (b) Waiver and Amendment.  Any provision of this Agreement may be waived at
any time by the party that is entitled to the benefits of such  provision.  This
Agreement may not be modified,  amended, altered or supplemented except upon the
execution and delivery of a written agreement executed by the parties hereto.

     (c) Entire Agreement; No Third-Party Beneficiary;  Severability.  Except as
otherwise set forth in the Merger Agreement,  this Agreement,  together with the
Merger Agreement,  (a) constitutes the entire agreement and supersedes all prior
agreements and  understandings,  both written and oral, between the parties with
respect to the subject  matter hereof and (b) is not intended to confer upon any
person other than the parties  hereto any rights or remedies  hereunder.  If any
term, provision, covenant or restriction of this Agreement is held by a court of
competent  jurisdiction or a federal or state  regulatory  agency to be invalid,
void or  unenforceable,  the remainder of the terms,  provisions,  covenants and
restrictions  of this Agreement  shall remain in full force and effect and shall
in no way be affected,  impaired or invalidated. If for any reason such court or
regulatory agency determines that the Option does not permit Grantee to acquire,
or does not require Issuer (or Substitute Option Issuer) to repurchase, the full
number of shares of Issuer Common Stock (or Substitute Common Stock) as provided
in Sections 2, 7 and 9 (or in the case of Substitute Common Stock Sections 2 and
8), as adjusted  pursuant to Section 6, it is the express intention of Issuer to
allow Grantee to acquire or to require  Issuer to repurchase  such lesser number
of shares as may be permissible without any amendment or modification hereof.

     (D) GOVERNING LAW. THIS AGREEMENT SHALL BE GOVERNED AND CONSTRUED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK WITHOUT REGARD TO ANY

APPLICABLE CONFLICTS OF LAW RULES.

     (e) Descriptive Headings. The descriptive headings contained herein are for
convenience  of  reference  only and shall not affect in any way the  meaning or
interpretation of this Agreement.

     (f) Notices.  All notices and other  communications  hereunder  shall be in
writing and shall be deemed  given if  delivered  personally,  telecopied  (with
confirmation)  or  mailed  by  registered  or  certified  mail  (return  receipt
requested) to the parties at the  following  addresses (or at such other address
for a party as shall be specified by like notice):

<PAGE>

                                                                              13

     If to Grantee to:

          Cognizant Corporation
          200 Nyala Farms
          Westport, CT 06880
          Attention: General Counsel
          Telecopier No.: (203) 222-4313

     with a copy to:

          Simpson Thacher & Bartlett
          425 Lexington Avenue
          New York, New York 10017
          Attention: Peter J. Gordon, Esq.
          Telecopier No.: (212) 455-2502

     If to Issuer to:

          Walsh International Inc.
          105 Terry Drive, Suite 118
          Newtown, PA 18940
          Attention: General Counsel
          Telecopier No.: (215) 860-3277

     with a copy to:

          Reboul, MacMurray, Hewitt, Maynard
            & Kristol

          45 Rockefeller Plaza
          New York, NY 10111

          Attention: Karen C. Wiedemann, Esq.
          Telecopier No.:  (212) 841-5725

     (g) Counterparts.  This Agreement and any amendments hereto may be executed
in two  counterparts,  each of  which  shall  be  considered  one  and the  same
agreement and shall become effective when both  counterparts have been signed by
each of the parties and delivered to the other party,  it being  understood that
both parties need not sign the same counterpart.

     (h) Assignment. Grantee may assign this Agreement in whole to any affiliate
of Grantee at any time.  Except as  provided in the next  sentence,  Grantee may
not,   without  the  prior  written  consent  of  Issuer  (which  shall  not  be
unreasonably  withheld),  assign this  Agreement to any other  person.  Upon the
occurrence of a Purchase Event, Grantee may sell, transfer,  assign or otherwise
dispose of, in whole at any time, its rights and obligations  hereunder.  In the
case of any sale,  transfer,  assignment or disposition  of this Option,  Issuer
shall do all things reasonably

<PAGE>

                                                                              14

necessary to facilitate such transaction. This Agreement shall not be assignable
by Issuer except by operation of law.  Subject to the preceding  sentence,  this
Agreement  shall be binding upon,  inure to the benefit of and be enforceable by
the parties and their respective successors and assigns.

     (i)  Representations  and Warranties.  The  representations  and warranties
contained in Sections 3.01(a) and 3.02(a) of the Merger  Agreement,  and, to the
extent they relate to this Stock Option Agreement, in Sections 3.01(c),(d), (p),
(q) and (t) and  3.02(c) of the Merger  Agreement,  are  incorporated  herein by
reference.

     (j)  Further  Assurances.  In the event of any  exercise  of the  Option by
Grantee,  Issuer and Grantee shall  execute and deliver all other  documents and
instruments and take all other action that may be reasonably  necessary in order
to consummate the transactions provided for by such exercise.

     (k) Specific Performance.  The parties hereto agree that this Agreement may
be enforced by either party through specific performance,  injunctive relief and
other equitable relief.  Both parties further agree to waive any requirement for
the securing or posting of any bond in connection with the obtaining of any such
equitable  relief  and that this  provision  is without  prejudice  to any other
rights  that the  parties  hereto  may  have for any  failure  to  perform  this
Agreement.

     15.  Termination.  Notwithstanding  any  other  provision  to the  contrary
contained in this Agreement,  this Agreement shall terminate,  and Grantee shall
have no  further  rights  hereunder,  upon  the  payment  in full of any and all
amounts due under Sections 8.02(a) and 8.02(b) of the Merger Agreement.

<PAGE>

                                                                              15

     IN WITNESS  WHEREOF,  Issuer and  Grantee  have  caused  this Stock  Option
Agreement to be signed by their respective officers thereunto duly authorized as
of the day and year first written above.

                                       WALSH INTERNATIONAL INC.

                                       By: /s/ Michael Hauck

                                           ----------------------------
                                       Name:  Michael Hauck
                                       Title: Chief Executive Officer

                                       COGNIZANT CORPORATION

                                       By: /s/ Kenneth S. Siegel

                                           --------------------------------
                                       Name:  Kenneth S. Siegel
                                       Title: Senior Vice President, General

                                              Counsel and Secretary



                                                                    Exhibit 99.1

                                                                            NEWS

Cognizant

Contact: Joseph C. Allen                                  For Immediate Release
         (203) 222-4235

                IMS HEALTH SIGNS DEFINITIVE AGREEMENTS TO ACQUIRE

                          WALSH INTERNATIONAL AND PMSI

            Cognizant Corporation Spin-off Strengthens its Leadership

                       In the Health Information Industry

Westport,  CT,  Mar.  23,  1998  -  Cognizant  Corporation   (NYSE:CZT),   Walsh
International  Inc.  (NASDAQ:WSHI) and  Pharmaceutical  Marketing  Services Inc.
(NASDAQ:PMRX)  today  announced  the signing of  definitive  agreements  for IMS
HEALTH to acquire Walsh and PMSI. IMS HEALTH is the premier  global  provider of
information solutions to the pharmaceutical and healthcare industries, with more
than $1 billion in 1997 revenue.

         "The acquisition of Walsh and PMSI consolidated IMS HEALTH's leadership
position in our core markets," said Robert E. Weissman,  Cognizant  chairman and
chief executive officer.  "Customer value is enhanced by offering broader global
coverage, an expanded product and service portfolio, and accelerated investments
in  innovative  new  products.  Financially,  these  transactions  are accretive
near-term  beginning in 1999,  adding growth businesses which result in improved
shareholder value."

         Under terms of the agreements,  Walsh  shareholders  will receive .3041
shares of Cognizant  common stock per Walsh share, as payment to shareholders of
$167 million, and

<PAGE>

         PMSI  shareholders  will receive .2800 shares of Cognizant common stock
per PMSI  share,  as  payment to  shareholders  of $180  million.  The number of
Cognizant  shares received is subject to a collar  adjustment based on the price
of Cognizant  shares  during a period prior to the closing of the  transactions.
Walsh currently has approximately 10.6 million shares  outstanding;  PMSI shares
outstanding total approximately 12.4 million.

         The transactions have been  independently  authorized by the Cognizant,
Walsh and PMSI  boards of  directors,  and are  subject to approval by Walsh and
PMSI  shareholders.  The  transactions  will be  accounted  for  under  purchase
accounting and are projected to close in the second quarter of 1998,  subject to
regulatory approval. Both transactions are expected to be tax-free.

          Walsh  International,  based in Newtown,  PA, generated revenue of $54
million in its fiscal year ended June 30, 1997,  and employs  approximately  500
professionals in 14 countries.  Walsh, established in 1988, develops and markets
leading-edge sales force automation systems for  pharmaceutical  companies.  The
company's   integrated   technology,   data  and   services   are  used  by  540
pharmaceutical  sales  forces in 85  healthcare  companies  in over 30 countries
around  the  world.  Precise(TM)  and  Premiere(TM),   two  of  Walsh's  leading
electronic  territory  management  systems (ETMS)  products,  today support over
14,000 users.

         New York-based  PMSI had ongoing  information  services  revenue of $74
million for its fiscal year ended June 30, 1997, and employs  approximately  500
professionals  in nine  countries.  PMSI was  established in 1991 and provides a
range of information  services to pharmaceutical and healthcare companies in the
U.S.,  Europe and Japan.  On Dec. 15, 1997,  PMSI  completed the  acquisition of
Source Europe, a business delivering prescription database services in five

<PAGE>

         European  countries.  Scott-Levin,  PMSI's  U.S.  subsidiary,  provides
market  research and managed care audits,  as well as strategic  consulting,  to
pharmaceutical  companies  in the  U.S.  PMSI  is the  international  leader  in
physician profiling database services, with its Scriptrac(TM) service offered in
Europe and Japan.

         "IMS HEALTH is committed to building  customer value," said Victoria R.
Fash, IMS HEALTH president and chief operating officer. "Walsh and PMSI together
complete a global product portfolio of IMS sales and marketing services. We plan
to  accelerate  investment  in  innovative  new  business  solutions,  including
physician  micro-marketing,  and the integration of ETMS mobile  technology with
IMS databases.  By offering  full-spectrum global solutions,  IMS HEALTH enables
improved efficiency and effectiveness, designed to increase productivity for our
pharmaceutical customers worldwide, said Ms. Fash.

         In Europe,  IMS HEALTH plans to accelerate  its  prescription  database
launch  significantly  by combining  the IMS  Xtrend(TM)  and PMSI's  Source(TM)
micro-marketer  initiatives.  Walsh's  Pharbase(TM)  data and  PMSI's  physician
profiles  enable  enhanced  physician  targeting   services.   Scott-Levin  will
strengthen  IMS  HEALTH's  market  research  business  in the U.S. by adding new
capabilities  in market  research  audits,  managed care services and consulting
services.

         The  combination of IMS HEALTH's Sales  Technologies,  which is focused
primarily  in the U.S.,  and Walsh,  concentrated  in Europe  and Asia  Pacific,
instantly  creates  the  global  leader  in ETMS  for  pharmaceutical  companies
worldwide.  Combined,  Sales  Technologies  and Walsh support over 35,000 users.
"Financially,  these  acquisitions are sound  investments," said Ms. Fash. "Both
are projected to be earnings neutral in 1998,  becoming  accretive in 1999. Cost
synergies in known

 <PAGE>

         areas, such as duplicate data supply contracts,  are the key assumption
driving 1999 accretion.  Walsh  International  and Scott-Levin  offer attractive
revenue growth rates,  anticipated in the mid-teens  range  near-term.  While we
believe  long-term  revenue  upside  exists,  incremental  revenue  has not been
incorporated in the projections, based on a conservative financial approach."

         IMS HEALTH is the world's leading provider of information  solutions to
the pharmaceutical and healthcare industries. Pharmaceutical sales, prescription
and market data and analysis are offered,  along with decision  support  systems
that  facilitate the  advancement of world health.  IMS HEALTH  operates in more
than 90 countries,  and its businesses include: IMS, the leading global provider
of sales management and market research information to pharmaceutical companies;
Erisco, a provider of software-based  administrative and analytical solutions to
the  healthcare  industry;  Cognizant  Technology  Solutions,  an  outsourcer of
software applications and development services;  and Enterprises,  the company's
venture capital unit, focused on investments in emerging healthcare  businesses.
IMS HEALTH is also the largest  shareholder of GartnerGroup  (NASDAQ:GART),  the
premier provider of research and advisory services to the information technology
industry.

         IMS HEALTH is currently a unit of Cognizant Corporation (NYSE:CZT).  On
Jan.  15,  1998,  Cognizant  announced  plans to become two  independent  public
companies  by  mid-1998:  IMS  HEALTH and  Nielsen  Media  Research.  Additional
information is available at Cognizant's Website: http//www.cognizantcorp.com

                                       ###

Mar. 23, 1998

<PAGE>

         This  press   release   includes   statements   which  may   constitute
forward-looking  statements  made pursuant to the safe harbor  provisions of the
Private  Securities  Litigation Reform Act of 1995.  Although Cognizant believes
the expectations contained in such forward-looking statements are reasonable, it
can  give  no  assurance  that  such  expectations  will  prove  correct.   This
information may involve risks and uncertainties  that could cause actual results
of Cognizant,  IMS HEALTH, Walsh International or PMSI to differ materially from
the forward-looking statements.  Factors which could cause or contribute to such
differences  include,  but are not  limited  to (i) the  risks  associated  with
operating  on a global  basis,  including  fluctuations  in the value of foreign
currencies  relative to the U.S. dollar,  and the ability to successfully  hedge
such risks, (ii) the ability to develop new or advanced technologies and systems
for  their  businesses  on  a  cost-effective   basis,   (iii)  the  ability  to
successfully  achieve  estimated  effective  tax  rates and  corporate  overhead
levels, (iv) regulatory and legislative initiatives, particularly in the area of
medical privacy, (v) deterioration in economic  conditions,  particularly in the
pharmaceutical,  healthcare, information technology or other industries in which
their customers  operate,  (vi)  conditions in the securities  markets which may
affect the value or liquidity of portfolio investments,  and (vii) other factors
detailed in Cognizant's SEC filings.



DRAFT 3/23/98 10 a.m.
FINAL REVIEWS/APPROVALS BY NOON 3/23/1998

                                                                    Exhibit 99.2

                                                                            NEWS

Cognizant

                                                           For Immediate Release

Contact:          Joseph C. Allen                     Martyn Williams
                  Cognizant Corporation               Walsh International
                  (203) 222-4235                      44-1372-389-3000

                      IMS HEALTH SIGNS DEFINITIVE AGREEMENT

                         TO ACQUIRE WALSH INTERNATIONAL

              Cognizant Corporation Spin-off Creates Global Leader
                 In Pharmaceutical Sales Force Automation Market

                     Through Merger with Sales Technologies

Westport,  CT,  Mar.  23,  1998  -  Cognizant  Corporation   (NYSE:CZT),   Walsh
International  Inc.  (NASDAQ:WSHI)  today  jointly  announced  the  signing of a
definitive  agreement for IMS HEALTH to acquire Walsh. IMS HEALTH is the premier
global provider of information  solutions to the  pharmaceutical  and healthcare
industries, with more than $1 billion in 1997 revenue.

         "IMS HEALTH's Sales Technologies and Walsh  International are a perfect
fit strategically," said Victoria R. Fash, president and chief operating officer
of IMS HEALTH.  "Together  they are  instantly the global market leader in sales
force automation  solutions,  focused solely on the pharmaceutical  industry. By
merging Sales Technologies leading position in the U.S. with Walsh's established
presence in Europe and Asia Pacific, we offer unmatched worldwide coverage."

<PAGE>

         Under terms of the  agreement,  Walsh  shareholders  will receive .3041
shares of Cognizant  common stock per Walsh share, as payment to shareholders of
$167  million.  The number of Cognizant  shares  received is subject to a collar
adjustment  based on the price of Cognizant  shares during a period prior to the
closing  of  the  transaction.  Walsh  has  approximately  10.6  million  shares
outstanding.

         The transaction has been independently  authorized by the Cognizant and
Walsh boards of directors, and is subject to approval by Walsh shareholders. The
transaction will be accounted for under purchase  accounting,  is expected to be
tax-free,  and is projected to close in the second  quarter of 1998,  subject to
regulatory approval.

         "IMS's   extensive   global   coverage   and   reputation   within  the
pharmaceutical  industry provide tremendous advantages in driving revenue growth
from our lead products,  Premiere(TM) and Precise(TM), said Michael Hauck, Walsh
chief executive officer.  "Sales Technologies'  Cornerstone(TM)  complements our
technology while our Pharbase medical professional  databases further strengthen
the IMS HEALTH data services.  The entire management team is enthusiastic  about
becoming part of IMS HEALTH."

         Based in Newtown,  PA,  Walsh  International  generated  revenue of $54
million in its fiscal year ended June 30, 1997,  and employs  approximately  500
professionals in 14 countries. Walsh, established in 1988, is a market leader in
sales force automation  systems wich assist  pharmaceutical and other healthcare
companies   in  the   efficient   management   of  their  sales  and   marketing
organizations. Walsh's services include advanced electronic territory management
systems,  strategic  sales and  marketing  management  information  systems  and
comprehensive data

<PAGE>

management services. The company's integrated technology,  data and services are
used by 500  pharmaceutical  sales forces in 85 healthcare  companies in over 30
countries.

         "Sales  Technologies and Walsh International are committed to providing
leading-edge  electronic  territory management solutions to our customers," said
Ronald   Brown,   who  has  been  named   chief   executive   officer  of  Sales
Technologies/Walsh, the newly formed division of IMS HEALTH. "We plan to market,
support  and  develop  both  product  lines  going  forward,  while  offering  a
longer-term  migration  path.  A  competitive  advantage  for  customers  is  an
accelerated investment in R&D enabled by this transaction, designed to bring the
next generation of technology to market faster."

         IMS HEALTH is the world's leading provider of information  solutions to
the pharmaceutical and healthcare industries. Pharmaceutical sales, prescription
and market data and analysis are offered,  along with decision  support  systems
that  facilitate the  advancement of world health.  IMS HEALTH  operates in more
than 90 countries,  and its businesses include: IMS, the leading global provider
of sales management and market research information to pharmaceutical companies;
Erisco, a provider of software-based  administrative and analytical solutions to
the  healthcare  industry;  Cognizant  Technology  Solutions,  an  outsourcer of
software applications and development services;  and Enterprises,  the company's
venture capital unit, focused on investments in emerging healthcare  businesses.
IMS HEALTH is also the largest  shareholder of GartnerGroup  (NASDAQ:GART),  the
premier provider of research and advisory services to the information technology
industry.

         IMS HEALTH is currently a unit of Cognizant Corporation (NYSE:CZT).  On
Jan.  15,  1998,  Cognizant  announced  plans to become two  independent  public
companies by mid-1998:

<PAGE>

IMS HEALTH and Nielsen Media  Research.  Additional  information is available at
Cognizant's Website: http//www.cognizantcorp.com

                                       ###

Mar. 23, 1998

This press release  includes  statements  which may  constitute  forward-looking
statements made pursuant to the safe harbor provisions of the Private Securities
Litigation  Reform Act of 1995.  Although  Cognizant  believes the  expectations
contained in such  forward-looking  statements  are  reasonable,  it can give no
assurance  that such  expectations  will prove  correct.  This  information  may
involve risks and  uncertainties  that could cause actual  results of Cognizant,
IMS HEALTH, or Walsh International to differ materially from the forward-looking
statements. Factors which could cause or contribute to such differences include,
but are not  limited  to (i) the risks  associated  with  operating  on a global
basis, including fluctuations in the value of foreign currencies relative to the
U.S. dollar,  and the ability to successfully hedge such risks, (ii) the ability
to develop new or advanced  technologies  and systems for their  businesses on a
cost-effective  basis,  (iii) the  ability  to  successfully  achieve  estimated
effective  tax  rates  and  corporate  overhead  levels,   (iv)  regulatory  and
legislative  initiatives,  particularly  in the  area of  medical  privacy,  (v)
deterioration  in  economic  conditions,  particularly  in  the  pharmaceutical,
healthcare,  information technology or other industries in which their customers
operate, (vi) conditions in the securities markets which may affect the value or
liquidity  of  portfolio  investments,  and  (vii)  other  factors  detailed  in
Cognizant's SEC filings.



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