NETWORK ASSOCIATES INC
SC 13D, 1998-03-05
PREPACKAGED SOFTWARE
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<PAGE>   1
                                UNITED STATES
                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549



                                 SCHEDULE 13D
                                      
                  UNDER THE SECURITIES EXCHANGE ACT OF 1934

                       TRUSTED INFORMATION SYSTEMS, INC.
- --------------------------------------------------------------------------------
                               (Name of Issuer)


                                  COMMON STOCK
- --------------------------------------------------------------------------------
                        (Title of Class of Securities)

                                  897908-10-9
- --------------------------------------------------------------------------------
                                (CUSIP Number)

      PRABHAT K. GOYAL, CHIEF FINANCIAL OFFICER, NETWORKS ASSOCIATES, INC.
- --------------------------------------------------------------------------------
                       (Formerly McAfee Associates, Inc.)
                               2805 BOWERS AVENUE
                         SANTA CLARA, CALIFORNIA 95051
                                 (408) 988-3832
                (Name, Address and Telephone Number of Person
              Authorized to Receive Notices and Communications)


                               February 22, 1998
- --------------------------------------------------------------------------------
           (Date of Event which Requires Filing of this Statement)

         If the filing person has previously filed a statement on Schedule 13G
to report the acquisition which is the subject of this Schedule 13D, and is
filing this schedule because of Rule 13d-1(b)(3) or (4), check the following box
[ ].

         NOTE: Six copies of this statement, including all exhibits, should be
filed with the Commission.  See Rule 13d-1(a) for other parties to whom copies
are to be sent.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).

<PAGE>   2
                                  SCHEDULE 13D


CUSIP No.     897908-10-9                                      PAGE 2 OF 8 PAGES

- --------------------------------------------------------------------------------
   1  NAME OF REPORTING PERSON
      S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
      Networks Associates, Inc. (Formerly McAfee Associates, Inc.)
- --------------------------------------------------------------------------------
   2  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                       (a) [ ]
      N/A                                                              (b) [ ]
- --------------------------------------------------------------------------------
   3  SEC USE ONLY

- --------------------------------------------------------------------------------
   4  SOURCE OF FUNDS*
      00
- --------------------------------------------------------------------------------
   5  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT 
      TO ITEMS 2(d) or 2(e)                                                 [ ]
      N/A
- --------------------------------------------------------------------------------
   6  CITIZENSHIP OR PLACE OF ORGANIZATION
      STATE OF DELAWARE
- --------------------------------------------------------------------------------
                      7   SOLE VOTING POWER
                          In the event the stock option becomes exercisable and
                          is exercised in full, Networks Associates, Inc. will
                          have sole voting power with respect to that number of
                          shares equal to 19.9% of the then outstanding shares
                          of Common Stock of Trusted Information Systems, Inc.
                          ("TIS"), which based upon the 13,825,797 shares of TIS
                          outstanding as of February 22, 1998, currently equals
        NUMBER OF         2,751,334 shares of Common Stock of TIS.
         SHARES       ----------------------------------------------------------
      BENEFICIALLY    8   SHARED VOTING POWER
        OWNED BY          4,393,716
          EACH        ----------------------------------------------------------
        REPORTING     9   SOLE DISPOSITIVE POWER
         PERSON           In the event the stock option becomes exercisable and
          WITH            is exercised in full, Networks Associates, Inc. will
                          have sole dispositive power with respect to that 
                          number of shares equal to 19.9% of the then
                          outstanding shares of Common Stock of TIS, which,
                          based upon the 13,825,797 shares of TIS outstanding 
                          as of February 22, 1998 currently equals 2,751,334 
                          shares of Common Stock of TIS.
                      ----------------------------------------------------------
                      10  SHARED DISPOSITIVE POWER
                          0
- --------------------------------------------------------------------------------
  11  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
      In the event the stock option becomes exercisable and is exercised in
      full, Networks Associates, Inc. will beneficially own that number of
      shares equal to 19.9% of the then outstanding shares of Common Stock of
      TIS, which based upon the 13,825,797 shares of TIS outstanding as of 
      February 22, 1998, currently equals 2,751,334 shares of Common Stock of 
      TIS, plus the 4,393,716 shares over which Networks Associates, Inc. 
      shares voting power pursuant to the voting agreements and proxies.
- --------------------------------------------------------------------------------
  12  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* [ ]

- --------------------------------------------------------------------------------
  13  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
      43.1%
- --------------------------------------------------------------------------------
  14  TYPE OF REPORTING PERSON*
      CO
- --------------------------------------------------------------------------------

                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
          INCLUDE BOTH SIDES OF THE COVER PAGE RESPONSES TO ITEMS 1-7

<PAGE>   3
                                  SCHEDULE 13D

CUSIP NO. 897908-10-9                                          PAGE 3 OF 8 PAGES

Neither the filing of this Schedule 13D nor any of its contents shall be deemed
to constitute an admission by Networks Associates, Inc. that it is the
beneficial owner of any of the Common Stock referred to herein for purposes of
Section 13(d) of the Securities Exchange Act of 1934, as amended (the "Act"), or
for any other purpose, and such beneficial ownership is expressly disclaimed.

ITEM 1.         SECURITY AND ISSUER.

                This statement on Schedule 13D relates to the Common Stock of
                Trusted Information Systems, Inc., a Delaware corporation ("TIS"
                or "Issuer"). The principal executive offices of TIS are located
                at 3060 Washington Road, Glenwood, Maryland 21738.

ITEM 2.         IDENTITY AND BACKGROUND.

                The name of the corporation filing this statement is Networks
                Associates, Inc., a Delaware corporation ("Network Associates").
                Network Associates' principal business is the development,
                marketing, distribution and support of network security and
                management software products. The address of the principal
                executive offices of Network Associates is 2805 Bowers Avenue,
                Santa Clara, California 9505l. Set forth on Schedule A is the
                name and present principal occupation or employment and the
                name, principal business and address of any corporation or other
                organization in which such employment is conducted, of each of
                Network Associates' directors and executive officers, as of the
                date hereof.

                Neither Network Associates, nor to Network Associates' best
                knowledge, any person named on Schedule A hereto is required to
                disclose legal proceedings pursuant to Items 2(d) or 2(e).

ITEM 3.         SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION.

                Pursuant to an Agreement and Plan of Reorganization dated
                February 22, 1998, (the "Reorganization Agreement"), among
                Network Associates, Thor Acquisition Corp., a Delaware
                corporation and wholly-owned subsidiary of Network Associates
                ("Merger Sub") and TIS, and subject to the conditions set forth
                therein (including approval by stockholders of TIS), Merger Sub
                will merge with and into TIS and TIS will become a wholly-owned
                subsidiary of Network Associates (such events constituting the
                "Merger"). Once the Merger is consummated, Merger Sub will cease
                to exist as a corporation and all of the business, assets,
                liabilities and obligations of Merger Sub will be merged into
                TIS with TIS remaining as the surviving corporation (the
                "Surviving Corporation"). As a result of the Merger, each
                outstanding share of TIS Common Stock, other than shares owned
                by Merger Sub, Network Associates or any wholly-owned subsidiary
                of TIS or Network Associates, will be converted into the right
                to receive 0.3230 of a share of Network Associates common Stock.
                The foregoing summary of the Merger is qualified in its entirety
                by reference to the copy of the
<PAGE>   4
                                  SCHEDULE 13D

CUSIP NO. 897908-10-9                                          PAGE 4 OF 8 PAGES


                Reorganization Agreement included as Exhibit 1 to this Schedule
                13D and incorporated herein in its entirety by reference.

                This statement on Schedule 13D also relates to Voting Agreements
                and the Stock Option Agreement each as described in Items 4 and
                5 below.

ITEM 4.         PURPOSE OF TRANSACTION.

                (a) - (b) As described in Item 3 above, this statement relates
                to the Merger of Merger Sub, a wholly-owned subsidiary of
                Network Associates, with and into TIS in a statutory merger
                pursuant to the Delaware General Corporation Law. At the
                effective time of the Merger, the separate existence of Merger
                Sub will cease to exist and TIS will continue as the Surviving
                Corporation and as a wholly-owned subsidiary of Network
                Associates. Holders of outstanding TIS Common Stock will
                receive, in exchange for each share of TIS Common Stock held by
                them, 0.3230 shares of Network Associates Common Stock, Network
                Associates will assume the outstanding options issued under TIS
                stock option plans.

                As an inducement to Network Associates to enter into the
                Reorganization Agreement, each stockholder who is a party to a
                Voting Agreement, dated as of February 22, 1998 (collectively,
                the "Voting Agreements"), among the parties thereto
                (collectively, the "Voting Agreement Stockholders") and Network
                Associates, has, by executing a Voting Agreement, irrevocably
                appointed Network Associates (or any nominee of Network
                Associates) as his, hers or its lawful attorney and proxy. Such
                proxies, collectively, give Network Associates the limited right
                to vote each of the 4,393,716 shares (plus any new shares (i)
                purchased by such Stockholder or (ii) shares to which such
                Stockholder becomes a beneficial owner where the Stockholder
                also has voting power) of TIS Common Stock beneficially and
                collectively owned by the Voting Agreement Stockholders in all
                matters related to the Merger. The shared voting power with the
                certain shareholders of Issuer relates to the same 4,393,716
                shares of TIS Common Stock (plus any new shares (i) purchased by
                such Stockholder or (ii) shares to which such Stockholder
                becomes a beneficial owner where the Stockholder also has voting
                power) (the "Shares"). The Voting Agreement Stockholders and the
                number of shares beneficially owned by each of them is set forth
                in Schedule B hereto which is hereby incorporated by this
                reference. The foregoing summary of the Voting Agreement is
                qualified in its entirety by reference to the copy of the form
                of Voting Agreement included as Exhibit 2 to this Schedule 13D
                and incorporated herein in its entirety by reference.

                In exercising its right to vote the Shares as lawful attorney
                and proxy of the Voting Agreement Stockholders, Network
                Associates (or any nominee of Network Associates) will be
                limited, at every TIS stockholders meeting and every written
                consent in lieu of such meeting to vote the shares in favor of
                approval of the Merger and the Reorganization Agreement. The
                Voting Agreement Stockholders may vote the Shares on all other
                matters.
<PAGE>   5
                                  SCHEDULE 13D

CUSIP NO. 897908-10-9                                          PAGE 5 OF 8 PAGES


                The Voting Agreements terminate upon the earlier to occur of (i)
                such date and time as the Merger shall become effective in
                accordance with the terms and provisions of the Reorganization
                Agreement or (ii) ninety (90) days after the termination of the
                Reorganization Agreement in accordance with its terms.

                Also as an inducement to Network Associates to enter into the
                Reorganization Agreement, Network Associates and TIA entered
                into a Stock Option Agreement dated February 22, 1998 (the
                "Stock Option Agreement") pursuant to which Issuer granted
                Network Associates the right (the "Option"), under certain
                conditions, to purchase up to a number of shares of TIS Common
                Stock equal to 19.9% of the issued and outstanding TIS Common
                Stock. The foregoing summary of the Stock Option Agreement is
                qualified in its entirety by reference to the copy of the Stock
                Option Agreement included as Exhibit 3 to this Schedule 13D and
                incorporated herein in its entirety by reference.

                (c) Not applicable.

                (d) It is anticipated that upon consummation of the Merger, the
                directors of the Surviving Corporation shall be the current
                directors of Merger Sub. It is anticipated that the initial
                officers of the Surviving Corporation shall be the officers of
                Merger Sub, until their respective successors are duly elected
                or appointed and qualified.

                (e) Other than as a result of the Merger described in Item 3
                above, not applicable.

                (f) Not applicable.

                (g) Upon consummation of the Merger, the Certificate of
                Incorporation of Merger Sub, as in effect immediately prior to
                the Merger, shall be the Certificate of Incorporation of the
                Surviving Corporation until thereafter amended as provided by
                Delaware Law and such Certificate of Incorporation; provided,
                however, that the Certificate of Incorporation of the Surviving
                Corporation shall be amended to read as follows: "The name of
                the corporation is Trusted Information Systems, Inc." Upon
                consummation of the Merger, the Bylaws of Merger Sub, as in
                effect immediately prior to the Merger, shall be the Bylaws of
                the Surviving Corporation until thereafter amended.

                (h) - (i) If the Merger is consummated as planned, the TIS
                Common Stock will be de-registered under the Act and de-listed
                from The Nasdaq Stock Market.

                (j) Other than described above, Network Associates currently has
                no plan or proposals which relate to, or may result in, any of
                the matters listed in Items 4(a) - (j) of Schedule 13D (although
                Network Associates reserves the right to develop such plans).
<PAGE>   6
                                  SCHEDULE 13D

CUSIP NO. 897908-10-9                                          PAGE 6 OF 8 PAGES


ITEM 5.         INTEREST IN SECURITIES OF THE ISSUER.

                (a)-(b) As a result of the Voting Agreements, Network Associates
                may be deemed to be the beneficial owner of at least 4,393,716
                shares of TIS Common Stock. Such TIS Common Stock constitutes
                approximately 31.8% of the issued and outstanding shares of TIS
                Common Stock as of February 22, 1998.

                Network Associates has shared power to vote all of the Shares
                for the limited purposes described above. Network Associates
                does not have the sole power to vote or to direct the vote or to
                dispose or to direct the disposition of any shares of TIS Common
                Stock.

                If pursuant to the Stock Option Agreement the Option becomes
                exercisable, Network Associates would have the right to acquire
                up to the number of shares of TIS Common Stock constituting
                19.9% of the TIS Common Stock then issued and outstanding. If
                acquired, Network Associates would have sole voting and
                dispositive power over such shares, which shares would number
                2,751,334 based upon the number of the shares of TIS Common
                Stock issued and outstanding as of February 22, 1998. As a
                result of the Voting Agreement and if the Option is exercised,
                Network Associates may be deemed to beneficially own an
                aggregate of 7,145,050 shares of TIS Common Stock based upon the
                number of shares of TIS Common Stock issued and outstanding as
                of February 22, 1998 or 43.1% of the issued and outstanding
                shares of TIS Common Stock as of February 22, 1998.

                To Network Associates' knowledge, no shares of TIS Common Stock
                are beneficially owned by any of the persons named in Schedule
                A. In addition, Network Associates has not effected any
                transaction in TIS Common Stock during the past 60 days and to
                Network Associates' knowledge, none of the persons named in
                Schedule A has effected any transaction in TIS Common Stock
                during the past 60 days.
<PAGE>   7
                                  SCHEDULE 13D

CUSIP NO. 897908-10-9                                          PAGE 7 OF 8 PAGES

ITEM 6.         CONTRACTS, ARRANGEMENTS.  UNDERSTANDING OR RELATIONSHIPS WITH 
                RESPECT TO SECURITIES OF THE ISSUER.

                Other than the Reorganization Agreement, Voting Agreements and
                the Stock Option Agreement, to the best knowledge of Network
                Associates, there are no contracts, arrangements, understandings
                or relationships (legal or otherwise) among the persons named in
                Item 2 and between such persons and any person with respect to
                any securities of TIS, including but not limited to transfer or
                voting of any of the securities, finder's fees, joint ventures,
                loan or option arrangement, puts or calls, guarantees of
                profits, division of profits or loss, or the giving or
                withholding of proxies.

ITEM 7.         MATERIALS TO BE FILED AS EXHIBITS.

                The following documents are filed as exhibits:

                1.      Agreement and Plan of Reorganization, dated February 22,
                        1998, by and among Network Associates, Inc., a Delaware
                        corporation, Thor Acquisition Corp., a Delaware
                        corporation and wholly-owned subsidiary of Network
                        Associates, Inc., and Trusted Information Systems, Inc.,
                        a Delaware corporation.

                2.      Form of Voting Agreement, dated February 22, 1998, by
                        and among Network Associates, Inc., a Delaware
                        corporation, and certain stockholders of Trusted
                        Information Systems, Inc., a Delaware corporation.

                3.      Stock Option Agreement dated, February 22, 1998, by and
                        between Trusted Information Systems, Inc., a Delaware
                        corporation, and Network Associates, Inc., a Delaware
                        corporation.
<PAGE>   8
                                  SCHEDULE 13D

CUSIP NO. 897908-10-9                                          PAGE 8 OF 8 PAGES


                                    SIGNATURE

      After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.

Dated:   March 4, 1998

                                       NETWORKS ASSOCIATES, INC.


                                       By: /s/ Prabhat K. Goval
                                           ------------------------------------


<PAGE>   9
                                   Schedule A

                       DIRECTORS AND EXECUTIVE OFFICERS OF
                            NETWORKS ASSOCIATES, INC.


<TABLE>
<CAPTION>
                                                Present Principal Occupation and
Name and Title                                         Name of Employer               Citizenship
- -------------                                          ----------------               -----------
<S>                                             <C>                                   <C>
William L. Larson                                 Networks Associates, Inc.              U.S.
Chief Executive Officer
and Chairman of the Board of Directors

Leslie G. Denend                                  Networks Associates, Inc.              U.S.
President and Director

Prabhat K. Goyal                                  Networks Associates, Inc.              U.S.
Chief Financial Officer,
Vice President Administration,
Treasurer and Secretary

Dennis Cline                                      Networks Associates, Inc.              U.S.
Vice President of Worldwide Sales

Zachary Nelson                                    Networks Associates, Inc.              U.S.
Vice President and General Manager -
Total Service Desk/Mkt

Peter R. Watkins                                  Networks Associates, Inc.              U.S.
Vice President and General Manager -
Total Virus and Defense

David M. Carver                                   Networks Associates, Inc.              U.S.
Vice President and General Manager -
Consulting & Services

John R. Stringer                                  Networks Associates, Inc.              U.S.
Vice President and General Manager -
Total Networks Visibility

John C. Bolger                                       96 Sutherland Drive                 U.S.
Director                                             Atherton, CA 94027

Harry J. Saal                                          1955 Bryant Street                U.S.
Director                                             Palo Alto, CA 94301

Virginia Gemmell                                           President                     U.S.
Director                                                GlidePath, Inc.
                                                 211 N. Union Street, Suite 100
                                                     Alexandria, VA 22314
</TABLE>



<PAGE>   10
                                   Schedule A

                       DIRECTORS AND EXECUTIVE OFFICERS OF
                            NETWORKS ASSOCIATES, INC.


<TABLE>
<S>                                <C>                                      <C>
Edwin Harper
Director                           President and Chief Executive Officer    U.S.
                                               Syquest
                                        47071 Bayside Parkway
                                         Fremont, CA 94538
</TABLE>



<PAGE>   11
                                   Schedule B

<TABLE>
<CAPTION>
                                  Number of Shares of TIS       Percentage of outstanding TIS
                                 Common Stock Beneficially           Common Stock as of
Stockholder                                Owned                      February 22, 1998
- -----------                      -------------------------      -----------------------------
<S>                                     <C>                               <C>
 
Dr. Martha Branstad                      1,434,391                          10.37%
(including shares held
by trusts over which
Dr. Branstad has 
voting control).

Stephen T. Walker                        2,959,325                          21.40%
(including shares held
by trusts over which
Mr. Walker has 
voting control).
</TABLE>
<PAGE>   12
                                                                   EXHIBIT 1


                      AGREEMENT AND PLAN OF REORGANIZATION

                                  BY AND AMONG


                            NETWORKS ASSOCIATES, INC.


                             THOR ACQUISITION CORP.

                                       AND

                        TRUSTED INFORMATION SYSTEMS, INC.



                          DATED AS OF FEBRUARY 22, 1998


<PAGE>   13
                                  PROJECT THOR
                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                               PAGE
                                                                                               ----
<S>                                                                                            <C>
ARTICLE I - THE MERGER...........................................................................1

        1.1    The Merger........................................................................1
        1.2    Effective Time; Closing...........................................................1
        1.3    Effect of the Merger..............................................................2
        1.4    Certificate of Incorporation; Bylaws..............................................2
        1.5    Directors and Officers............................................................2
        1.6    Effect on Capital Stock ..........................................................2
        1.7    Surrender of Certificates.........................................................3
        1.8    No Further Ownership Rights in Company Common Stock...............................4
        1.9    Lost, Stolen or Destroyed Certificates............................................4
        1.10   Tax and Accounting Consequences...................................................4
        1.11   Taking of Necessary Action; Further Action........................................4

ARTICLE II - REPRESENTATIONS AND WARRANTIES OF COMPANY...........................................5

        2.1    Organization of Company...........................................................5
        2.2    Company Capital Structure.........................................................5
        2.3    Obligations With Respect to Capital Stock.........................................5
        2.4    Authority.........................................................................6
        2.5    SEC Filings; Company Financial Statements.........................................7
        2.6    Absence of Certain Changes or Events..............................................7
        2.7    Taxes.............................................................................8
        2.8    Title to Properties; Absence of Liens and Encumbrances............................9
        2.9    Intellectual Property.............................................................9
        2.10   Compliance; Permits; Restrictions................................................12
        2.11   Litigation.......................................................................13
        2.12   Brokers' and Finders' Fees.......................................................13
        2.13   Employee Benefit Plans...........................................................13
        2.14   Environmental Matters............................................................16
        2.15   Agreements, Contracts and Commitments............................................16
        2.16   Pooling of Interests.............................................................17
        2.17   Change of Control Payments.......................................................17
        2.18   Statements; Proxy Statement/Prospectus...........................................17
        2.19   Board Approval...................................................................18
        2.20   Fairness Opinion.................................................................18
        2.21   Section 203 of the Delaware General Corporation Law Not Applicable...............18
        2.22   Customs..........................................................................18

ARTICLE III - REPRESENTATIONS AND WARRANTIES OF PARENT AND MERGER SUB...........................18

        3.1    Organization of Parent and Merger Sub............................................18
        3.2    Parent and Merger Sub Capital Structure..........................................19
        3.3    Authority........................................................................19
        3.4    SEC Filings; Parent Financial Statements.........................................19
        3.5    Absence of Certain Changes or Events.............................................20
        3.6    Statements; Proxy Statement/Prospectus...........................................20
</TABLE>

                                       -i-

<PAGE>   14
                                  PROJECT THOR
                           TABLE OF CONTENTS (CONT'D)

<TABLE>
<CAPTION>
                                                                                               PAGE
                                                                                               ----
<S>                                                                                            <C>
        3.7    Valid Issuance...................................................................20

ARTICLE IV - CONDUCT PRIOR TO THE EFFECTIVE TIME................................................20

        4.1    Conduct of Business by Company...................................................20
        4.2    Conduct of Business by Parent....................................................22

ARTICLE V - ADDITIONAL AGREEMENTS...............................................................23

        5.1    Proxy Statement/Prospectus; Registration Statement; Other Filings; 
                 Board Recommendations .........................................................23
        5.2    Meeting of Company Stockholders..................................................23
        5.3    Confidentiality; Access to Information...........................................23
        5.4    No Solicitation..................................................................24
        5.5    Public Disclosure................................................................24
        5.6    Reasonable Efforts; Notification.................................................25
        5.7    Third Party Consents.............................................................25
        5.8    Stock Options and Employee Benefits..............................................25
        5.9    Form S-8.........................................................................26
        5.10   Indemnification..................................................................26
        5.11   Nasdaq Listing...................................................................26
        5.12   Company Affiliate Agreement......................................................27
        5.13   Regulatory Filings; Reasonable Efforts...........................................27

ARTICLE VI - CONDITIONS TO THE MERGER...........................................................27

        6.1    Conditions to Obligations of Each Party to Effect the Merger.....................27
        6.2    Additional Conditions to Obligations of Company..................................28
        6.3    Additional Conditions to the Obligations of Parent and Merger Sub................28

ARTICLE VII - TERMINATION, AMENDMENT AND WAIVER.................................................29

        7.1    Termination......................................................................29
        7.2    Notice of Termination; Effect of Termination.....................................30
        7.3    Fees and Expenses................................................................30
        7.4    Amendment........................................................................30
        7.5    Extension; Waiver................................................................30

ARTICLE VIII - GENERAL PROVISIONS...............................................................31

        8.1    Non-Survival of Representations and Warranties...................................31
        8.2    Notices..........................................................................31
        8.3    Interpretation; Knowledge........................................................32
        8.4    Counterparts.....................................................................32
        8.5    Entire Agreement; Third Party Beneficiaries......................................32
        8.6    Severability.....................................................................32
        8.7    Other Remedies; Specific Performance.............................................32
        8.8    Governing Law....................................................................32
</TABLE>


                                      -ii-

<PAGE>   15
                                  PROJECT THOR
                           TABLE OF CONTENTS (CONT'D)
<TABLE>
<CAPTION>
                                                                                               PAGE
                                                                                               ----
<S>                                                                                            <C>
        8.9    Rules of Construction............................................................33
        8.10   Assignment.......................................................................33
        8.11   WAIVER OF JURY TRIAL.............................................................33
</TABLE>


                                INDEX OF EXHIBITS

Exhibit A      Form of Voting Agreement

Exhibit B      Company Stock Option Agreement

Exhibit C      Form of Affiliate Agreement




                                      -iii-
<PAGE>   16
                                                                   
                      AGREEMENT AND PLAN OF REORGANIZATION


        This AGREEMENT AND PLAN OF REORGANIZATION is made and entered into as of
February 22, 1998, among Networks Associates, Inc., a Delaware corporation
("PARENT"), Thor Acquisition Corp., a Delaware corporation and a wholly-owned
subsidiary of Parent ("MERGER SUB"), and Trusted Information Systems, Inc., a
Delaware corporation ("COMPANY").

                                    RECITALS

        A. Upon the terms and subject to the conditions of this Agreement (as
defined in Section 1.2 below) and in accordance with the Delaware General
Corporation Law ("DELAWARE LAW"), Parent and Company intend to enter into a
business combination transaction.

        B. The Board of Directors of Company (i) has determined that the Merger
(as defined in Section 1.1) is consistent with and in furtherance of the
long-term business strategy of Company and fair to, and in the best interests
of, Company and its stockholders, (ii) has approved this Agreement, the Merger
and the other transactions contemplated by this Agreement and (iii) has
determined to recommend that the stockholders of Company adopt and approve this
Agreement and approve the Merger.

        C. Concurrently with the execution of this Agreement, and as a condition
and inducement to Parent's willingness to enter into this Agreement, certain
affiliates of Company are entering into Voting Agreements in substantially the
form attached hereto as Exhibit A (the "COMPANY VOTING AGREEMENTS").

        D. Concurrently with the execution of this Agreement, and as a condition
and inducement to Parent's willingness to enter into this Agreement, Company
shall execute and deliver a Stock Option Agreement in favor of Parent in
substantially the form attached hereto as Exhibit B (the "COMPANY STOCK OPTION
AGREEMENT"). The Board of Directors of Company has approved the Company Stock
Option Agreement.

        E. The parties intend, by executing this Agreement, to adopt a plan of
reorganization within the meaning of Section 368 of the Internal Revenue Code of
1986, as amended (the "CODE").

        F. It is also intended by the parties hereto that the Merger shall
qualify for accounting treatment as a pooling of interests.

        NOW, THEREFORE, in consideration of the covenants, promises and
representations set forth herein, and for other good and valuable consideration,
the receipt and sufficiency of which are hereby acknowledged, the parties agree
as follows:


                                    ARTICLE I
                                   THE MERGER

        1.1 The Merger. At the Effective Time (as defined in Section 1.2) and
subject to and upon the terms and conditions of this Agreement and the
applicable provisions of Delaware Law, Merger Sub shall be merged with and into
Company (the "MERGER"), the separate corporate existence of Merger Sub shall
cease and Company shall continue as the surviving corporation. Company as the
surviving corporation after the Merger is hereinafter sometimes referred to as
the "SURVIVING CORPORATION."

        1.2 Effective Time; Closing. Subject to the provisions of this
Agreement, the parties hereto shall cause the Merger to be consummated by filing
a Certificate of Merger with the Secretary of State of the State of Delaware in
accordance with the relevant provisions of Delaware Law (the "CERTIFICATE OF
MERGER") (the time of such filing (or such later time as may be agreed in
writing by Company and Parent and specified in the Certificate of Merger) being
the "EFFECTIVE TIME")


<PAGE>   17
as soon as practicable on or after the Closing Date (as herein defined). Unless
the context otherwise requires, the term "AGREEMENT" as used herein refers
collectively to this Agreement and Plan of Reorganization and the Certificate of
Merger. The closing of the Merger (the "CLOSING") shall take place at the
offices of Wilson Sonsini Goodrich & Rosati, Professional Corporation, at a time
and date to be specified by the parties, which shall be no later than the second
business day after the satisfaction or waiver of the conditions set forth in
Article VI, or at such other time, date and location as the parties hereto agree
in writing (the "CLOSING DATE").

        1.3 Effect of the Merger. At the Effective Time, the effect of the
Merger shall be as provided in this Agreement and the applicable provisions of
Delaware Law. Without limiting the generality of the foregoing, and subject
thereto, at the Effective Time all the property, rights, privileges, powers and
franchises of Company and Merger Sub shall vest in the Surviving Corporation,
and all debts, liabilities and duties of Company and Merger Sub shall become the
debts, liabilities and duties of the Surviving Corporation.

        1.4    Certificate of Incorporation; Bylaws.

               (a) At the Effective Time, the Certificate of Incorporation of
Merger Sub, as in effect immediately prior to the Effective Time, shall be the
Certificate of Incorporation of the Surviving Corporation until thereafter
amended as provided by law and such Certificate of Incorporation of the
Surviving Corporation; provided, however, that at the Effective Time the
Certificate of Incorporation of the Surviving Corporation shall be amended so
that the name of the Surviving Corporation shall be "Trusted Information
Systems, Inc."

               (b) The Bylaws of Merger Sub, as in effect immediately prior to
the Effective Time, shall be, at the Effective Time, the Bylaws of the Surviving
Corporation until thereafter amended.

        1.5 Directors and Officers. The initial directors of the Surviving
Corporation shall be the directors of Merger Sub immediately prior to the
Effective Time, until their respective successors are duly elected or appointed
and qualified. The initial officers of the Surviving Corporation shall be the
officers of Merger Sub immediately prior to the Effective Time, until their
respective successors are duly appointed.

        1.6 Effect on Capital Stock. At the Effective Time, by virtue of the
Merger and without any action on the part of Merger Sub, Company or the holders
of any of the following securities:

               (a) Conversion of Company Common Stock. Each share of Common
Stock, $0.01 par value per share, of Company (the "COMPANY COMMON STOCK") issued
and outstanding immediately prior to the Effective Time, other than any shares
of Company Common Stock to be canceled pursuant to Section 1.6(b), will be
canceled and extinguished and automatically converted (subject to Sections
1.6(e) and (f)) into the right to receive 0.3230 (the "EXCHANGE RATIO") shares
of Common Stock of Parent (the "PARENT COMMON STOCK") upon surrender of the
certificate representing such share of Company Common Stock in the manner
provided in Section 1.7 (or in the case of a lost, stolen or destroyed
certificate, upon delivery of an affidavit (and bond, if required) in the manner
provided in Section 1.9).

               (b) Cancellation of Parent-Owned Stock. Each share of Company
Common Stock held by Company or owned by Merger Sub, Parent or any direct or
indirect wholly owned subsidiary of Company or of Parent immediately prior to
the Effective Time shall be canceled and extinguished without any conversion
thereof.

               (c) Stock Options; Employee Stock Purchase Plans. At the
Effective Time, all options to purchase Company Common Stock then outstanding
under Company's Amended and Restated Employee Stock Option Plan (the "EMPLOYEE
OPTION PLAN"), Company's Amended and Restated 1996 Directors Stock Option Plan
(the "DIRECTORS' PLAN") and Amended and Restated 1996 Stock Option Plan (the
"1996 OPTION PLAN" and together with the Employee Option Plan and the Directors'
Plan, the "COMPANY STOCK OPTION PLANS") shall be assumed by Parent in accordance
with Section 5.8 hereof. Rights outstanding under Company's Employee Stock
Purchase Plan (the "ESPP") shall be treated as set forth in Section 5.8.


                                       -2-

<PAGE>   18
               (d) Capital Stock of Merger Sub. Each share of Common Stock,
$0.01 par value per share, of Merger Sub (the "MERGER SUB COMMON STOCK") issued
and outstanding immediately prior to the Effective Time shall be converted into
one validly issued, fully paid and nonassessable share of Common Stock, $0.01
par value per share, of the Surviving Corporation. Each certificate evidencing
ownership of shares of Merger Sub Common Stock shall evidence ownership of such
shares of capital stock of the Surviving Corporation.

               (e) Adjustments to Exchange Ratio. The Exchange Ratio shall be
adjusted to reflect appropriately the effect of any stock split, reverse stock
split, stock dividend (including any dividend or distribution of securities
convertible into Parent Common Stock or Company Common Stock), reorganization,
recapitalization, reclassification or other like change with respect to Parent
Common Stock or Company Common Stock occurring on or after the date hereof and
prior to the Effective Time.

               (f) Fractional Shares. No fraction of a share of Parent Common
Stock will be issued by virtue of the Merger, but in lieu thereof each holder of
shares of Company Common Stock who would otherwise be entitled to a fraction of
a share of Parent Common Stock (after aggregating all fractional shares of
Parent Common Stock that otherwise would be received by such holder) shall
receive from Parent an amount of cash (rounded to the nearest whole cent) equal
to the product of (i) such fraction, multiplied by (ii) the average closing
price of one share of Parent Common Stock for the five (5) most recent days that
Parent Common Stock has traded ending on the trading day immediately prior to
the Effective Time, as reported on the Nasdaq National Market System ("NASDAQ").

        1.7    Surrender of Certificates.

               (a) Exchange Agent. Parent shall select a bank or trust company
reasonably acceptable to Company to act as the exchange agent (the "EXCHANGE
AGENT") in the Merger.

               (b) Parent to Provide Common Stock. Promptly after the Effective
Time, Parent shall make available to the Exchange Agent for exchange in
accordance with this Article I, the shares of Parent Common Stock issuable
pursuant to Section 1.6 in exchange for outstanding shares of Company Common
Stock, and cash in an amount sufficient for payment in lieu of fractional shares
pursuant to Section 1.6(f) and any dividends or distributions to which holders
of shares of Company Common Stock may be entitled pursuant to Section 1.7(d).

               (c) Exchange Procedures. Promptly after the Effective Time,
Parent shall cause the Exchange Agent to mail to each holder of record (as of
the Effective Time) of a certificate or certificates (the "CERTIFICATES"), which
immediately prior to the Effective Time represented outstanding shares of
Company Common Stock whose shares were converted into shares of Parent Common
Stock pursuant to Section 1.6, cash in lieu of any fractional shares pursuant to
Section 1.6(f) and any dividends or other distributions pursuant to Section
1.7(d), (i) a letter of transmittal in customary form (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 shall
contain 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 Parent Common Stock, cash in lieu of any
fractional shares pursuant to Section 1.6(f) and any dividends or other
distributions pursuant to Section 1.7(d). Upon surrender of Certificates for
cancellation to the Exchange Agent or to such other agent or agents as may be
appointed by Parent, together with such letter of transmittal, duly completed
and validly executed in accordance with the instructions thereto, the holders of
such Certificates shall be entitled to receive in exchange therefor certificates
representing the number of whole shares of Parent Common Stock into which their
shares of Company Common Stock were converted at the Effective Time, payment in
lieu of fractional shares which such holders have the right to receive pursuant
to Section 1.6(f) and any dividends or distributions payable pursuant to Section
1.7(d), and the Certificates so surrendered shall forthwith be canceled. Until
so surrendered, outstanding Certificates will be deemed from and after the
Effective Time, for all corporate purposes, subject to Section 1.7(d) as to the
payment of dividends, to evidence only the ownership of the number of full
shares of Parent Common Stock into which such shares of Company Common Stock
shall have been so converted and the right to receive an amount in cash in lieu
of the issuance of any fractional shares in accordance with Section 1.6(f) and
any dividends or distributions payable pursuant to Section 1.7(d).



                                       -3-

<PAGE>   19
               (d) Distributions With Respect to Unexchanged Shares. No
dividends or other distributions declared or made after the date of this
Agreement with respect to Parent Common Stock with a record date after the
Effective Time will be paid to the holders of any unsurrendered Certificates
with respect to the shares of Parent Common Stock represented thereby until the
holders of record of such Certificates shall surrender such Certificates.
Subject to applicable law, following surrender of any such Certificates, the
Exchange Agent shall deliver to the record holders thereof, without interest,
certificates representing whole shares of Parent Common Stock issued in exchange
therefor along with payment in lieu of fractional shares pursuant to Section
1.6(f) hereof and the amount of any such dividends or other distributions with a
record date after the Effective Time payable with respect to such whole shares
of Parent Common Stock.

               (e) Transfers of Ownership. If certificates representing shares
of Parent Common Stock are to be issued in a name other than that in which the
Certificates surrendered in exchange therefor are registered, it will be a
condition of the issuance thereof that the Certificates so surrendered will be
properly endorsed and otherwise in proper form for transfer and that the persons
requesting such exchange will have paid to Parent or any agent designated by it
any transfer or other taxes required by reason of the issuance of certificates
representing shares of Parent Common Stock in any name other than that of the
registered holder of the Certificates surrendered, or established to the
satisfaction of Parent or any agent designated by it that such tax has been paid
or is not payable.

               (f) No Liability. Notwithstanding anything to the contrary in
this Section 1.7, neither the Exchange Agent, Parent, the Surviving Corporation
nor any party hereto shall be liable to a holder of shares of Parent Common
Stock or Company Common Stock for any amount properly paid to a public official
pursuant to any applicable abandoned property, escheat or similar law.

        1.8 No Further Ownership Rights in Company Common Stock. All shares of
Parent Common Stock issued in accordance with the terms hereof (including any
cash paid in respect thereof pursuant to Section 1.6(f) and 1.7(d)) shall be
deemed to have been issued in full satisfaction of all rights pertaining to such
shares of Company Common Stock, and there shall be no further registration of
transfers on the records of the Surviving Corporation of shares of Company
Common Stock which were outstanding immediately prior to the Effective Time. If
after the Effective Time Certificates are presented to the Surviving Corporation
for any reason, they shall be canceled and exchanged as provided in this Article
I.

        1.9 Lost, Stolen or Destroyed Certificates. In the event any
Certificates shall have been lost, stolen or destroyed, the Exchange Agent shall
issue in exchange for such lost, stolen or destroyed Certificates, upon the
making of an affidavit of that fact by the holder thereof, certificates
representing the shares of Parent Common Stock into which the shares of Company
Common Stock represented by such Certificates were converted pursuant to Section
1.6, cash for fractional shares, if any, as may be required pursuant to Section
1.6(f) and any dividends or distributions payable pursuant to Section 1.7(d);
provided, however, that Parent may, in its discretion and as a condition
precedent to the issuance of such certificates representing shares of Parent
Common Stock, cash and other distributions, require the owner of such lost,
stolen or destroyed Certificates to deliver a customary indemnity against any
claim that may be made against Parent, the Surviving Corporation or the Exchange
Agent with respect to the Certificates alleged to have been lost, stolen or
destroyed.

        1.10   Tax and Accounting Consequences.

               (a) It is intended by the parties hereto that the Merger shall
constitute a reorganization within the meaning of Section 368 of the Code. The
parties hereto adopt this Agreement as a "plan of reorganization" within the
meaning of Sections 1.368-2(g) and 1.368-3(a) of the United States Income Tax
Regulations.

               (b) It is intended by the parties hereto that the Merger shall
qualify for accounting treatment as a pooling of interests.

        1.11 Taking of Necessary Action; Further Action. If, at any time after
the Effective Time, any further action is necessary or desirable to carry out
the purposes of this Agreement and to vest the Surviving Corporation with full
right, title and possession to all assets, property, rights, privileges, powers
and franchises of Company and Merger Sub, the officers and directors of Company
and Merger Sub will take all such lawful and necessary action. Parent shall
cause Merger Sub to perform all of its obligations relating to this Agreement
and the transactions contemplated thereby.



                                       -4-

<PAGE>   20
                                   ARTICLE II
                    REPRESENTATIONS AND WARRANTIES OF COMPANY

        Company represents and warrants to Parent and Merger Sub, subject to the
exceptions specifically disclosed in writing in the disclosure letter and
referencing a specific representation supplied by Company to Parent dated as of
the date hereof and certified by a duly authorized officer of Company (the
"COMPANY SCHEDULES"), as follows:

        2.1 Organization of Company.

               (a) Company and each of its subsidiaries (i) is a corporation or
other legal entity duly organized, validly existing and in good standing under
the laws of the jurisdiction in which it is organized; (ii) has the corporate or
other power and authority to own, lease and operate its assets and property and
to carry on its business as now being conducted; and (iii) except as would not
be material to Company, is duly qualified or licensed to do business in each
jurisdiction where the character of the properties owned, leased or operated by
it or the nature of its activities makes such qualification or licensing
necessary.

               (b) Company has delivered to Parent a true and complete list of
all of Company's subsidiaries as of the date of this Agreement, indicating the
jurisdiction of organization of each subsidiary and Company's equity interest
therein.

               (c) Company has delivered or made available to Parent a true and
correct copy of the Certificate of Incorporation and Bylaws of Company and
similar governing instruments of each of its subsidiaries, each as amended to
date, and each such instrument is in full force and effect. Neither Company nor
any of its subsidiaries is in violation of any of the provisions of its
Certificate of Incorporation or Bylaws or equivalent governing instruments.

        2.2 Company Capital Structure. The authorized capital stock of Company
consists of 40,000,000 shares of Common Stock, $0.01 par value per share, of
which there were 13,825,196 shares issued and outstanding as of January 31, 1998
(with no shares held in treasury) and 5,000,000 shares of Preferred Stock, $0.01
par value per share, of which no shares are issued or outstanding. All
outstanding shares of Company Common Stock are duly authorized, validly issued,
fully paid and nonassessable and are not subject to preemptive rights created by
statute, the Certificate of Incorporation or Bylaws of Company or any agreement
or document to which Company is a party or by which it is bound. As of January
31, 1998, Company had reserved an aggregate of 1,704,956 shares of Company
Common Stock, net of exercises, for issuance pursuant to the Company Stock
Option Plans and an aggregate of 369,273 shares of Company Common Stock for
issuance pursuant to the Company's ESPP. As of January 31, 1998, there were
options outstanding to purchase an aggregate of 1,394,687 shares of Company
Common Stock pursuant to the Company Stock Option Plans. In addition, as of May
28, 1998, the Company will be obligated to issue options to purchase 1,250
shares of Common Stock to each outside member of its Board of Directors pursuant
to the Directors' Plan in connection with the Company's 1998 annual meeting of
shareholders. As of May 28, 1998, the Company also will be obligated to issue
approximately 38,000 shares of Common Stock to employees of the Company pursuant
to the ESPP. All shares of Company Common Stock subject to issuance as
aforesaid, upon issuance on the terms and conditions specified in the
instruments pursuant to which they are issuable, would be duly authorized,
validly issued, fully paid and nonassessable. The Company Schedules list for
each person who held options to acquire shares of Company Common Stock as of
January 3, 1998, the name of the holder of such option, the exercise price of
such option, the number of shares as to which such option had vested at such
date, the vesting schedule for such option and whether the exercisability of
such option will be accelerated in any way by the transactions contemplated by
this Agreement, and indicates the extent of acceleration, if any.

        2.3 Obligations With Respect to Capital Stock. Except as set forth in
Section 2.2, there are no equity securities, partnership interests or similar
ownership interests of any class of Company equity security, or any securities
exchangeable or convertible into or exercisable for such equity securities,
partnership interests or similar ownership interests, issued, reserved for
issuance or outstanding. Except for securities Company owns free and clear of
all claims and encumbrances, directly or indirectly through one or more
subsidiaries, and except for shares of capital stock or other similar ownership
interests of certain subsidiaries of Company that are owned by certain nominee
equity holders as required by the applicable



                                       -5-
<PAGE>   21
law of the jurisdiction of organization of such subsidiaries, as of the date of
this Agreement, there are no equity securities, partnership interests or similar
ownership interests of any class of equity security of any subsidiary of
Company, or any security exchangeable or convertible into or exercisable for
such equity securities, partnership interests or similar ownership interests,
issued, reserved for issuance or outstanding. Except as set forth in Section
2.2, there are no subscriptions, options, warrants, equity securities,
partnership interests or similar ownership interests, calls, rights (including
preemptive rights), commitments or agreements of any character to which Company
or any of its subsidiaries is a party or by which it is bound obligating Company
or any of its subsidiaries to issue, deliver or sell, or cause to be issued,
delivered or sold, or repurchase, redeem or otherwise acquire, or cause the
repurchase, redemption or acquisition of, any shares of capital stock,
partnership interests or similar ownership interests of Company or any of its
subsidiaries or obligating Company or any of its subsidiaries to grant, extend,
accelerate the vesting of or enter into any such subscription, option, warrant,
equity security, call, right, commitment or agreement. As of the date of this
Agreement and except as described in Section 2.3 of the Company Schedules,
except as contemplated by this Agreement, there are no registration rights and,
to the knowledge of Company, there are no voting trusts, proxies, rights plan,
antitakeover plan or other agreements or understandings to which Company is a
party or by which it is bound with respect to any equity security of any class
of Company or with respect to any equity security, partnership interest or
similar ownership interest of any class of any of its subsidiaries. Stockholders
of Company will not be entitled to dissenters' rights under applicable state law
in connection with the Merger.

        2.4    Authority.

               (a) Company has all requisite corporate power and authority to
enter into this Agreement and the Company Option Agreement and to consummate the
transactions contemplated hereby and thereby. The execution and delivery of this
Agreement and the consummation of the transactions contemplated hereby have been
duly authorized by all necessary corporate action on the part of Company,
subject only to the approval and adoption of this Agreement and the approval of
the Merger by Company's stockholders and the filing of the Certificate of Merger
pursuant to Delaware Law. A vote of the holders of a majority of the outstanding
shares of the Company Common Stock is sufficient for Company's stockholders to
approve and adopt this Agreement and approve the Merger. This Agreement and the
Company Stock Option Agreement have been duly executed and delivered by Company
and, execution and delivery by Parent and Merger Sub, constitute a valid and
binding obligation of Company, enforceable against Company in accordance with
its terms, except as enforceability may be limited by bankruptcy and other
similar laws and general principles of equity. The execution and delivery of
this Agreement and the Company Option Agreement by Company do not, and the
performance of this Agreement and the Company Option Agreement by Company will
not, (i) conflict with or violate the Certificate of Incorporation or Bylaws of
Company or the equivalent organizational documents of any of its subsidiaries,
(ii) subject to obtaining the approval and adoption of this Agreement and the
approval of the Merger by Company's stockholders as contemplated in Section 5.2
and compliance with the requirements set forth in Section 2.4(b) below, conflict
with or violate any law, rule, regulation, order, judgment or decree applicable
to Company or any of its subsidiaries or by which Company or any of its
subsidiaries or any of their respective properties is bound or affected other
than any conflict or violation which would not result in material liability to
the Company, or (iii) result in any material breach of or constitute a material
default (or an event that with notice or lapse of time or both would become a
material default) under, or impair Company's rights or alter the rights or
obligations of any third party under, or give to others any rights of
termination, amendment, acceleration or cancellation of, or result in the
creation of a material lien or encumbrance on any of the material properties or
assets of Company or any of its subsidiaries pursuant to, any material note,
bond, mortgage, indenture, contract, agreement, lease, license, permit,
franchise, concession, or other instrument or obligation to which Company or any
of its subsidiaries is a party or by which Company or any of its subsidiaries or
its or any of their respective assets are bound or affected. The Company
Schedules list all consents, waivers and approvals under any of Company's or any
of its subsidiaries' agreements, contracts, licenses or leases required to be
obtained in connection with the consummation of the transactions contemplated
hereby, which, if individually or in the aggregate not obtained, would result in
a material loss of benefits to Company or Surviving Corporation or, to the
Company's knowledge, Parent as a result of the Merger.

               (b) No consent, approval, order or authorization of, or
registration, declaration or filing with any court, administrative agency or
commission or other governmental authority or instrumentality, foreign or
domestic ("GOVERNMENTAL ENTITY"), is required to be obtained or made by Company
in connection with the execution and delivery of this Agreement and the Company
Stock Option Agreement or the consummation of the Merger, except for (i) the
filing of the Certificate of Merger with the Secretary of State of the State of
Delaware, (ii) the filing of the Proxy


                                       -6-

<PAGE>   22
Statement/Prospectus (as defined in Section 2.18) with the Securities and
Exchange Commission ("SEC") in accordance with the Securities Exchange Act of
1934, as amended (the "EXCHANGE ACT"), (iii) such consents, approvals, orders,
authorizations, registrations, declarations and filings as may be required under
applicable federal, foreign and state securities (or related) laws and the
Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended (the "HSR
ACT"), and the securities or antitrust laws of any foreign country, and (iv)
such other consents, authorizations, filings, approvals and registrations which
if not obtained or made would not be material to Company or Parent or have a
material adverse effect on the ability of the parties hereto to consummate the
Merger.

        2.5    SEC Filings; Company Financial Statements.

               (a) Company has filed all forms, reports and documents required
to be filed by Company with the SEC since October 10, 1996 and has made
available to Parent such forms, reports and documents in the form filed with the
SEC. All such required forms, reports and documents (including those that
Company may file subsequent to the date hereof) are referred to herein as the
"COMPANY SEC REPORTS." As of their respective dates, the Company SEC Reports (i)
were prepared in accordance with the requirements of the Securities Act of 1933,
as amended (the "SECURITIES ACT"), or the Exchange Act, as the case may be, and
the rules and regulations of the SEC thereunder applicable to such Company SEC
Reports and (ii) did not at the time they were filed (or if amended or
superseded by a filing prior to the date of this Agreement, then on the date of
such filing) contain any untrue statement of a material fact or omit 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. None of Company's subsidiaries is required to file any
forms, reports or other documents with the SEC.

               (b) Each of the consolidated financial statements (including, in
each case, any related notes thereto) contained in the Company SEC Reports (the
"COMPANY FINANCIALS"), including each Company SEC Reports filed after the date
hereof until the Closing, (i) complied as to form in all material respects with
the published rules and regulations of the SEC with respect thereto, (ii) was
prepared in accordance with United States generally accepted accounting
principles ("GAAP") applied on a consistent basis throughout the periods
involved (except as may be indicated in the notes thereto or, in the case of
unaudited interim financial statements, as may be permitted by the SEC on Form
10-Q under the Exchange Act) and (iii) fairly presented the consolidated
financial position of Company and its subsidiaries as at the respective dates
thereof and the consolidated results of Company's operations and cash flows for
the periods indicated, except that the unaudited interim financial statements
may not contain footnotes and were or are subject to normal and recurring
year-end adjustments. The balance sheet of Company contained in Company SEC
Reports as of September 26, 1997 is hereinafter referred to as the "COMPANY
BALANCE SHEET." Except as disclosed in the Company Financials, since the date of
the Company Balance Sheet neither Company nor any of its subsidiaries has any
liabilities required under GAAP to be set forth on a balance sheet (absolute,
accrued, contingent or otherwise) which are, individually or in the aggregate,
material to the business, results of operations or financial condition of
Company and its subsidiaries taken as a whole, except for liabilities incurred
since the date of the Company Balance Sheet in the ordinary course of business
consistent with past practices.

               (c) Company has heretofore furnished to Parent a complete and
correct copy of any amendments or modifications, which have not yet been filed
with the SEC but which are required to be filed, to agreements, documents or
other instruments which previously had been filed by Company with the SEC
pursuant to the Securities Act or the Exchange Act.

        2.6 Absence of Certain Changes or Events. Since the date of the Company
Balance Sheet there has not been: (i) any Material Adverse Effect (as defined in
Section 8.3(c)) on Company, (ii) any declaration, setting aside or payment of
any dividend on, or other distribution (whether in cash, stock or property) in
respect of, any of Company's or any of its subsidiaries' capital stock, or any
purchase, redemption or other acquisition by Company of any of Company's capital
stock or any other securities of Company or its subsidiaries or any options,
warrants, calls or rights to acquire any such shares or other securities except
for repurchases from employees following their termination pursuant to the terms
of their pre-existing stock option or purchase agreements, (iii) any split,
combination or reclassification of any of Company's or any of its subsidiaries'
capital stock, (iv) any granting by Company or any of its subsidiaries of any
increase in compensation or fringe benefits, except for normal increases of cash
compensation in the ordinary course of business consistent with past practice,
or any payment by Company or any of its subsidiaries of any bonus, except for
bonuses made in the ordinary course of business consistent with past practice,
or any granting by Company or any of its subsidiaries of any increase in
severance or


                                       -7-

<PAGE>   23
termination pay or any entry by Company or any of its subsidiaries into any
currently effective employment, severance, termination or indemnification
agreement or any agreement the benefits of which are contingent or the terms of
which are materially altered upon the occurrence of a transaction involving
Company of the nature contemplated hereby, (v) entry by Company or any of its
subsidiaries into any licensing or other agreement with regard to the
acquisition or disposition of any material Intellectual Property (as defined in
Section 2.9) other than licenses in the ordinary course of business consistent
with past practice or any amendment or consent with respect to any licensing
agreement filed or required to be filed by Company with the SEC, (vi) any
material change by Company in its accounting methods, principles or practices,
except as required by concurrent changes in GAAP, or (vii) any material
revaluation by Company of any of its assets, including, without limitation,
writing down the value of capitalized inventory or writing off notes or accounts
receivable other than in the ordinary course of business.

        2.7    Taxes.

               (a) Definition of Taxes. For the purposes of this Agreement,
"TAX" or "TAXES" refers to any and all federal, state, local and foreign taxes,
assessments and other governmental charges, duties, impositions and liabilities
relating to taxes, including taxes based upon or measured by gross receipts,
income, profits, sales, use and occupation, and value added, ad valorem,
transfer, franchise, withholding, payroll, recapture, employment, excise and
property taxes, together with all interest, penalties and additions imposed with
respect to such amounts and any obligations under any agreements or arrangements
with any other person with respect to such amounts and including any liability
for taxes of a predecessor entity.

               (b)    Tax Returns and Audits.

                      (i) Company and each of its subsidiaries have timely filed
(taking into account applicable extensions) all federal and material state,
local and foreign returns, estimates, information statements and reports
("RETURNS") relating to Taxes required to be filed by Company and each of its
subsidiaries with any Tax authority, except such Returns which are not material
to Company, and have paid all Taxes shown to be due on such Returns.

                      (ii) Company and each of its subsidiaries as of the
Effective Time will have withheld with respect to its employees all federal and
state income taxes, Taxes pursuant to the Federal Insurance Contribution Act
("FICA"), Taxes pursuant to the Federal Unemployment Tax Act ("FUTA") and other
Taxes required to be withheld, which amounts are material individually or in the
aggregate.

                      (iii) Neither Company nor any of its subsidiaries has been
delinquent in the payment of any Tax nor is there any Tax deficiency
outstanding, proposed or assessed against Company or any of its subsidiaries,
nor has Company or any of its subsidiaries executed any unexpired waiver of any
statute of limitations on or extending the period for the assessment or
collection of any Tax.

                      (iv) Except as set forth on Schedule 2.7 of the Company
Schedules, no audit or other examination of any Return of Company or any of its
subsidiaries by any Tax authority is presently in progress, nor has Company or
any of its subsidiaries been notified of any request for such an audit or other
examination.

                      (v) No adjustment relating to any Returns filed by Company
or any of its subsidiaries has been proposed in writing formally or informally
by any Tax authority to Company or any of its subsidiaries or any representative
thereof.

                      (vi) Neither Company nor any of its subsidiaries has any
liability for unpaid Taxes which has not been accrued for or reserved on the
Company Balance Sheet, whether asserted or unasserted, contingent or otherwise,
which is material to Company, other than any liability for unpaid Taxes that may
have accrued since the date of the Company Balance Sheet in connection with the
operation of the business of Company and its subsidiaries in the ordinary
course.

                      (vii) There is no contract, agreement, plan or arrangement
to which Company is a party as of the date of this Agreement, including but not
limited to the provisions of this Agreement, covering any employee or former


                                       -8-

<PAGE>   24
employee of Company or any of its subsidiaries that, individually or
collectively, could give rise to the payment of any amount that would not be
deductible pursuant to Sections 280G, 404 or 162(m) of the Code.

                      (viii) Neither Company nor any of its subsidiaries has
filed any consent agreement under Section 341(f) of the Code or agreed to have
Section 341(f)(2) of the Code apply to any disposition of a subsection (f) asset
(as defined in Section 341(f)(4) of the Code) owned by Company.

                      (ix) Except for any such agreement or arrangement solely
between the Company and its subsidiaries, neither Company nor any of its
subsidiaries is party to or has any obligation under any tax-sharing, tax
indemnity or tax allocation agreement or arrangement.

                      (x) Except as may be required as a result of the Merger,
Company and its subsidiaries have not been and will not be required to include
any material adjustment in Taxable income for any Tax period (or portion
thereof) pursuant to Section 481 or Section 263A of the Code or any comparable
provision under state or foreign Tax laws as a result of transactions, events or
accounting methods employed prior to the Closing.

                      (xi) None of Company's or its subsidiaries' assets are tax
exempt use property within the meaning of Section 168(h) of the Code.

                      (xii) The Company Schedules list (A) any foreign Tax
holidays, (B) any intercompany transfer pricing agreements, or other
arrangements that have been established by Company or any of its subsidiaries
with any Tax authority and (C) any expatriate programs or policies affecting
Company or any of its subsidiaries.

        2.8    Title to Properties; Absence of Liens and Encumbrances.

               (a) The Company Schedules list the real property interests owned
by Company or any subsidiary as of the date of this Agreement. The Company
Schedules list all material real property leases to which Company or any
subsidiary is a party as of the date of this Agreement and each amendment
thereto that is in effect as of the date of this Agreement. All such current
leases are in full force and effect, are valid and effective in accordance with
their respective terms, and there is not, under any of such leases, any existing
default or event of default (or event which with notice or lapse of time, or
both, would constitute a default) that would give rise to a claim in an amount
greater than $50,000.

               (b) Each of Company and its subsidiaries has good and valid title
to, or, in the case of leased properties and assets, valid leasehold interests
in, all of its tangible properties and assets, real, personal and mixed, used or
held for use in its business, free and clear of any liens, pledges, charges,
claims, security interests or other encumbrances of any sort ("LIENS"), except
as reflected in the Company Financials and except for liens for taxes not yet
due and payable and such Liens or other imperfections of title and encumbrances,
if any, which are not material in character, amount or extent, and which do not
materially detract from the value, or materially interfere with the present use,
of the property subject thereto or affected thereby.

        2.9    Intellectual Property.

               (a) Each of Company and its subsidiaries owns, or is licensed or
otherwise possesses legally enforceable rights to use, all patents, trademarks,
trade names, service marks, copyrights, and any applications for such patents,
trademarks, trade names, service marks and copyrights, and all patent rights,
trade secrets, schematics, technology, know-how, computer software and tangible
or intangible proprietary information or material or other intellectual property
or proprietary rights that are used to conduct its business as currently
conducted (collectively, "Intellectual Property"). Each of Company and its
subsidiaries has taken reasonable measures to protect the proprietary nature of
each item of Intellectual Property that it considers confidential, and to
maintain in confidence all trade secrets and confidential information that it
presently owns or uses, except where the failure to own, license or possess
legally enforceable rights to use such Intellectual Property would not,
individually or in the aggregate, be expected to result in a material loss of
benefits or loss to the Company's business.


                                       -9-

<PAGE>   25
                      (i) Section 2.12(a)(i) of the Disclosure Schedule lists
all material patents and patent applications and all material trademarks,
registered copyrights, trade names and service marks owned by, or licensed
exclusively to, Company or any of its subsidiaries and which are currently used
in connection with the business of Company or its subsidiaries, including the
jurisdictions in which each such Intellectual Property right has been issued or
registered or in which any such application for such issuance or registration
has been filed.

                      (ii) Section 2.12(a)(ii) of the Disclosure Schedule lists
all material written licenses, sublicenses and other agreements to which Company
or any of its subsidiaries is a party and pursuant to which any person is
authorized to use any Intellectual Property rights (excluding (a) source or
object code end-user licenses granted to end-users in the ordinary course of
business that permit use of software products without a right to modify,
distribute or sublicense the same ("End-User Licenses")) and (b) licenses,
sublicenses or other agreements with resellers, distributors, original equipment
manufacturers and other third party intermediaries that grant non-exclusive
rights to use or modify (for purposes of establishing program interfaces) and
resell or sublicense source or object code which (A) did not in any individual
case represent $50,000 or more of revenues to the Company in 1997 on a
consolidated basis, (B) were in all material respects in the standard forms of
agreements provided by the Company to Acquiror, and (C) the Company has no
reason to believe it will be material to the Company's or any of its
subsidiaries' business or could reasonably be expected to have a material loss
to the Company.

                      (iii) Section 2.12(a)(iii) of the Disclosure Schedule
lists all material written licenses, sublicenses and other agreements as to
which Company or any of its subsidiaries is a party and pursuant to which
Company or any such Subsidiary is authorized to use any third party Intellectual
Property, including software ("Third Party Intellectual Property Rights") which
are incorporated in any existing product or service of Company or any of its
subsidiaries ("Embedded Products").

                      (iv) Section 2.12(a)(iv) of the Disclosure Schedule lists
all material written agreements or other arrangements under which Company or any
of its subsidiaries has provided or agreed to provide source code of any product
of the Company or any of its subsidiaries to any third party, except for
software development kits provided either to agent integration providers or by
shrink wrap licenses.

               Company has made available to Acquiror correct and complete
copies of all such patents, registrations, applications (owned by Company or any
of its subsidiaries), and all licenses, sublicenses and agreements referred to
above and as amended to date. Except for retail purchases of software, neither
Company nor any of its subsidiaries is a party to any oral license, sublicense
or agreement which, if reduced to written form, would be required to be listed
in Section 2.12 of the Disclosure Schedule under the terms of this Section
2.12(a).

               (b) With respect to each material item of Intellectual Property
that Company or any of its subsidiaries owns: (i) other than common law
trademarks, and subject to such rights as have been granted by Company or any of
its subsidiaries under non-exclusive license agreements and joint development
agreements entered into by Company or any of its subsidiaries (copies of which
have previously been made available or disclosed in writing to Acquiror),
Company or its subsidiaries possesses all right, title, interest in and to such
item; and (ii) such item is not subject to any outstanding judgment, order,
decree, stipulation or injunction that materially interferes with the conduct of
Company's or any of its subsidiaries' business as currently conducted. With
respect to each item of Third Party Intellectual Property Rights that is
material to the business of the Company or any of its subsidiaries: (i) the
license, sublicense or other agreement covering such item is legal, valid,
binding, enforceable and in full force and effect with respect to Company or its
subsidiaries, and, to Company's knowledge, is legal, valid, binding, enforceable
and in full force and effect with respect to each other party thereto; (ii)
neither Company nor any of its subsidiaries is in material breach or default
thereunder, and to Company's knowledge no other party to such license,
sublicense or other agreement is in material breach or default thereunder, and
no event has occurred which with notice or lapse of time would constitute a
material breach or default by Company or any of its subsidiaries or permit
termination, modification or acceleration thereunder by the other party thereto;
(iii) the underlying item of Third Party Intellectual Property is not subject to
any outstanding judgment, order, decree, stipulation or injunction to which
Company or any of is subsidiaries is a party or has been specifically named that
materially interferes with the conduct of Company's or any of its subsidiaries'
business as currently conducted, nor to Company's knowledge subject to any other
outstanding


                                      -10-

<PAGE>   26
judgment, order, decree, stipulation, or injunction that materially interferes
with the conduct of Company's or any of its subsidiaries' business as currently
conducted.

               (c) Except as set forth in Section 2.12 of the Disclosure
Schedule, neither Company nor any of its subsidiaries (i) has been named in any
suit, action or proceeding which involves a claim of infringement or
misappropriation of any Intellectual Property right of any third party or (ii)
has received any written notice alleging any such claim of infringement or
misappropriation. Company has made available to Acquiror correct and complete
copies of all such suits, actions or proceedings or written notices. To the
Company's knowledge, the manufacturing, marketing, licensing or sale of the
products or performance of the service offerings of Company and its subsidiaries
do not currently infringe, and have not infringed, any Intellectual Property
right of any third party or to Company's knowledge any patent rights of third
parties; and to the knowledge of Company, the Intellectual Property rights of
Company and its subsidiaries are not being infringed by activities, products or
services of any third party.

               (d) Except as set forth in Section 2.12 of the Disclosure
Schedule, the execution and delivery of this Agreement by the Company, and the
consummation of the transactions contemplated hereby, will neither cause the
Company nor any of its subsidiaries to be in violation or default under any
license, sublicense or agreement, nor terminate nor modify nor entitle any other
party to any such license, sublicense or agreement to terminate or modify such
license, sublicense or agreement, nor limit in any way the Company's or any of
its subsidiaries' ability to conduct its business or use or provide the use of
the Intellectual Property or intellectual property rights of others, which
violation, default, termination, modification or limitation would reasonably be
expected, individually or in the aggregate, to result in a material loss of
benefit or loss to the Company.

               (e) Except for Embedded Products for which the Company has valid
non-exclusive licenses which are disclosed in Section 2.12 of the Disclosure
Schedule and which are adequate for each of the Company's and its subsidiaries'
business as presently conducted and except for usual and customary rights
retained by the United States government with respect to Intellectual Property
developed under research contracts with the Federal government (the "Retained
Fed Rights"), the Company is the sole and exclusive owner or the licensee of,
with all right, title and interest in and to the Intellectual Property (free and
clear of any liens or encumbrances), and has sole and exclusive rights (and is
not contractually obligated to pay any compensation to any third party in
respect thereof) to the use and distribution therefor or the material covered
thereby in connection with the services or products in respect of which the
Intellectual Property are being used, except where the failure to have such
rights would not reasonably be expected to result in a material loss of benefit
or loss to the Company. To the Company's knowledge, the government has never
exercised, and the Company has no notice that the government intends to
exercise, its rights to use or provide to others the use of the Retained Fed
Rights with respect to the Intellectual Property in a manner that would be
material to the Company's non-governmental business. The Retained Fed Rights do
not materially interfere with the conduct of the Company's business.

               (f) The Company has heretofore delivered to Acquiror copies of
the Company's and each of its subsidiaries' standard forms of End-User Licenses.
Except as disclosed in Section 2.12 of the Disclosure Schedule (which describe
the material variations from the standard form of End-User License), neither the
Company nor any of its subsidiaries has entered into any End-User Licenses which
contain terms materially different than as set forth in the standard forms of
such agreements made available to Acquiror.

               (g) The Company and each of its subsidiaries has taken reasonable
security measures to safeguard and maintain the secrecy, confidentiality and
value of, and its property rights in, all Intellectual Property. All officers,
employees and consultants of the Company or any of its subsidiaries who have
access to proprietary information or Intellectual Property have executed and
delivered to the Company or any of its subsidiaries an agreement regarding the
protection of proprietary information and the assignment to the Company or any
of its subsidiaries of all Intellectual Property arising from the services
performed for the Company or any of its subsidiaries by such persons. No current
or prior officers, employees or consultants of the Company or any of its
subsidiaries claim any ownership interest in any material Intellectual Property
as a result of having been involved in the development of such property while
employed by or consulting to the Company or any of its subsidiaries, or
otherwise. Except as set forth in Section 2.12 of the Disclosure Schedule and
except for the Embedded Products, all of the Intellectual Property have been
developed by employees of the Company or any of its subsidiaries, within the
scope of their employment.


                                      -11-

<PAGE>   27
               (h) The Company and each of its subsidiaries has sufficient
right, title and interest in and to all material software development tools, not
entirely developed internally, used by the Company or any of its subsidiaries in
the development of any of the computer software included in the Intellectual
Property.

               (i) To the knowledge of the Company's management, as of the date
hereof, there are no material defects in the Company's or any of its
subsidiaries' software products, and there are no errors in any documentation,
specifications, manuals, user guides, promotional material, internal notes and
memos, technical documentation, drawings, flow charts, diagrams, source language
statements, demo disks, benchmark test results, and other written materials
related to, associated with or used or produced in the development of the
Company's or any of its subsidiaries' software products (collectively, the
"Design Documentation"), which defects or errors would reasonably be expected to
have, individually or in the aggregate, a Material Adverse Effect on the
Company. The occurrence in or use by the computer software products currently
sold by the Company or any of its subsidiaries, of dates on or after January 1,
2000 (the "Millennial Dates") will not adversely affect the performance of the
software with respect to date dependent data, computations, output or other
functions (including without limitation, calculating, computing and sequencing)
and the software will create, sort and generate output data related to or
including Millennial Dates without errors or omissions.

               (j) No government funding or university or college facilities
were used in the development of the Company's or any of its subsidiaries'
software products and the software was not developed pursuant to any contract or
other agreement with any person or entity except pursuant to contracts or
agreements listed in Section 2.12 of the Disclosure Schedule.

               (k) To the knowledge of the Company's management, Section 2.12(k)
of the Disclosure Schedule list all material warranty claims (including any
pending claims) related to the Company's or any of its subsidiaries' products
and the nature of such claims, except for customary product support and
maintenance. To the knowledge of the Company's management, except as set forth
in Section 2.12(k) of the Disclosure Schedule, neither the Company nor any of
its subsidiaries has made any material oral or written representations or
warranties with respect to its products or services.

               (l) Except as set forth on Schedule 2.12(k), the Company and its
subsidiaries have been and are in compliance with the Export Administration Act
of 1979, as amended, and all regulations promulgated thereunder.

        2.10   Compliance; Permits; Restrictions.

               (a) Neither Company nor any of its subsidiaries is, in any
material respect, in conflict with, or in default or in violation of (i) any
law, rule, regulation, order, judgment or decree applicable to Company or any of
its subsidiaries or by which Company or any of its subsidiaries or any of their
respective properties is bound or affected, or (ii) any material note, bond,
mortgage, indenture, contract, agreement, lease, license, permit, franchise or
other instrument or obligation to which Company or any of its subsidiaries is a
party or by which Company or any of its subsidiaries or its or any of their
respective properties is bound or affected, except for conflicts, violations and
defaults that (individually or in the aggregate) would not cause Company to lose
any material benefit or incur any material liability. To the knowledge of the
Company, no investigation or review by any Governmental Entity is pending or has
been threatened in a writing delivered to Company against Company or any of its
subsidiaries, nor, to Company's knowledge, has any Governmental Entity indicated
an intention to conduct an investigation of Company or any of its subsidiaries.
There is no material agreement, judgment, injunction, order or decree binding
upon Company or any of its subsidiaries which has or could reasonably be
expected to have the effect of prohibiting or materially impairing any business
practice of Company or any of its subsidiaries, any acquisition of material
property by Company or any of its subsidiaries or the conduct of business by
Company as currently conducted.

               (b) Company and its subsidiaries hold, to the extent legally
required, all permits, licenses, variances, exemptions, orders and approvals
from governmental authorities that are material to and required for the
operation of the business of Company as currently conducted (collectively, the
"COMPANY PERMITS") except for any such failure which would not individually or
in the aggregate be material to the Company. Company and its subsidiaries are in
compliance in all material respects with the terms of the Company Permits,
except where the failure to be in compliance with the terms of the Company
Permits would not be material to Company.


                                      -12-

<PAGE>   28
        2.11 Litigation. Except as disclosed in the Company Schedules, there are
no claims, suits, actions or proceedings pending or, to the knowledge of the
Company, threatened against, relating to or affecting Company or any of its
subsidiaries, before any court, governmental department, commission, agency,
instrumentality or authority, or any arbitrator that seeks to restrain or enjoin
the consummation of the transactions contemplated by this Agreement or which
could reasonable be expected, either singularly or in the aggregate with all
such claims, actions or proceedings, to have a material loss to the Company's
business. No Governmental Entity has at any time challenged or questioned in a
writing delivered to Company the legal right of Company to design. manufacture,
offer or sell any of its products in the present manner or style thereof.

        Except as disclosed in the Company Schedules, neither Company nor any
Subsidiary has ever been subject to an audit, compliance review, investigation
or like contract review by the GSA office of the Inspector General or other
Governmental Entity or agent thereof in connection with any government contract
(a "GOVERNMENT AUDIT"), to Company's knowledge no Government Audit is threatened
or reasonably anticipated, and in the event of such Government Audit, to the
knowledge of the Company no basis exists for a finding of noncompliance with any
material provision of any government contract or a refund of any amounts paid or
owed by any Governmental Entity pursuant to such government contract. For each
item disclosed in the Company Schedule pursuant to this Section 2.11 a true and
complete copy of all material correspondence and documentation with respect
thereto has been provided to Parent.

        2.12 Brokers' and Finders' Fees. Except for fees payable to J.P. Morgan
Securities Inc. and Updata Capital, Inc. pursuant to engagement letters, each
dated January 21, 1998, copies of which have been provided to Parent, Company
has not incurred, nor will it incur, directly or indirectly, any liability for
brokerage or finders' fees or agents' commissions or any similar charges in
connection with this Agreement or any transaction contemplated hereby.

        2.13   Employee Benefit Plans.

               (a) Definitions. With the exception of the definition of
"Affiliate" set forth in Section 2.13(a)(i) below (which definition shall apply
only to this Section 2.13), for purposes of this Agreement, the following terms
shall have the meanings set forth below:

                      (i) "AFFILIATE" shall mean any other person or entity
under common control with Company within the meaning of Section 414(b), (c), (m)
or (o) of the Code and the regulations issued thereunder;

                      (ii) "COMPANY EMPLOYEE PLAN" shall mean any plan, program,
policy, practice, contract, agreement or other arrangement providing for
compensation, severance, termination pay, performance awards, stock or stock-
related awards, fringe benefits or other employee benefits or remuneration of
any kind, whether written or unwritten or otherwise, funded or unfunded,
including without limitation, each "employee benefit plan," within the meaning
of Section 3(3) of ERISA which is or has been maintained, contributed to, or
required to be contributed to, by Company or any Affiliate for the benefit of
any Employee

                      (iii) "COBRA" shall mean the Consolidated Omnibus Budget
Reconciliation Act of 1985, as amended

                      (iv) "DOL" shall mean the Department of Labor;

                      (v) "EMPLOYEE" shall mean any current, former, or retired
employee, officer, or director of Company or any Affiliate;

                      (vi) "EMPLOYEE AGREEMENT" shall mean each management,
employment, severance, consulting, relocation, repatriation, expatriation,
visas, work permit or similar agreement or contract between Company or any
Affiliate and any Employee or consultant;

                      (vii) "ERISA" shall mean the Employee Retirement Income
Security Act of 1974, as amended;

                      (viii) "FMLA" shall mean the Family Medical Leave Act of
1993, as amended;


                                      -13-

<PAGE>   29
                      (ix) "INTERNATIONAL EMPLOYEE PLAN" shall mean each Company
Employee Plan that has been adopted or maintained by Company, whether informally
or formally, for the benefit of Employees outside the United States;

                       (x) "IRS" shall mean the Internal Revenue Service;

                      (xi) "MULTIEMPLOYER PLAN" shall mean any "Pension Plan"
(as defined below) which is a "multiemployer plan," as defined in Section 3(37)
of ERISA;

                      (xii) "PBGC" shall mean the Pension Benefit Guaranty
Corporation; and

                      (xiii) "PENSION PLAN" shall mean each Company Employee
Plan which is an "employee pension benefit plan," within the meaning of Section
3(2) of ERISA.

               (b) Schedule. The Company Schedules contain an accurate and
complete list of each Company Employee Plan and each material Employee
Agreement. Company does not have any plan or commitment to establish any new
Company Employee Plan, to modify any Company Employee Plan or Employee Agreement
(except to the extent required by law or to conform any such Company Employee
Plan or Employee Agreement to the requirements of any applicable law, in each
case as previously disclosed to Parent in writing, or as required by this
Agreement), or to enter into any Company Employee Plan or material Employee
Agreement, nor does it have any intention or commitment to do any of the
foregoing.

               (c) Documents. Company has provided to Parent: (i) correct and
complete copies of all documents embodying to each Company Employee Plan and
each Employee Agreement including all amendments thereto and written
interpretations thereof; (ii) the three (3) most recent annual reports (Form
Series 5500 and all schedules and financial statements attached thereto), if
any, required under ERISA or the Code in connection with each Company Employee
Plan or related trust; (iii) if the Company Employee Plan is funded, the most
recent annual and periodic accounting of Company Employee Plan assets; (iv) the
most recent summary plan description together with the summary of material
modifications thereto, if any, required under ERISA with respect to each Company
Employee Plan; (v) all IRS determination, opinion, notification and advisory
letters, and rulings relating to Company Employee Plans and copies of all
applications and correspondence to or from the IRS or the DOL with respect to
any Company Employee Plan; (vi) all material written agreements and contracts
relating to each Company Employee Plan, including, but not limited to,
administrative service agreements, group annuity contracts and group insurance
contracts; (vii) all communications material to any Employee or Employees
relating to any Company Employee Plan and any proposed Company Employee Plans,
in each case, relating to any amendments, terminations, establishments,
increases or decreases in benefits, acceleration of payments or vesting
schedules or other events which would result in any material liability to
Company; (viii) all standard COBRA forms and related notices; and (ix) all
registration statements and prospectuses prepared in connection with each
Company Employee Plan.

               (d) Employee Plan Compliance. (i) Company has performed in all
material respects all obligations required to be performed by it under, is not
in default or violation of, and has no knowledge of any default or violation by
any other party to each Company Employee Plan, and each Company Employee Plan
has been established and maintained in all material respects in accordance with
its terms and in compliance with all applicable laws, statutes, orders, rules
and regulations, including but not limited to ERISA or the Code; (ii) each
Company Employee Plan intended to qualify under Section 401(a) of the Code and
each trust intended to qualify under Section 501(a) of the Code has either
received a favorable determination letter from the IRS with respect to each such
Plan as to its qualified status under the Code, including all amendments to the
Code effected by the Tax Reform Act of 1986 and subsequent legislation, or has
remaining a period of time under applicable Treasury regulations or IRS
pronouncements in which to apply for such a determination letter and make any
amendments necessary to obtain a favorable determination; (iii) no "prohibited
transaction," within the meaning of Section 4975 of the Code or Sections 406 and
407 of ERISA, and not otherwise exempt under Section 408 of ERISA, has occurred
with respect to any Company Employee Plan; (iv) there are no actions, suits or
claims pending, or, to the knowledge of Company, threatened or reasonably
anticipated (other than routine claims for benefits) against any Company
Employee Plan or against the assets of any Company Employee Plan; (v) each
Company Employee Plan can be amended, terminated or otherwise discontinued after
the Effective Time in accordance with its terms, without liability to Parent,
Company or any of its Affiliates (other than ordinary administration expenses
typically incurred in a termination event); (vi) there are no audits,


                                      -14-

<PAGE>   30
inquiries or proceedings pending or, to the knowledge of Company or any
Affiliates, threatened by the IRS or DOL with respect to any Company Employee
Plan; and (vii) neither Company nor any Affiliate is subject to any penalty or
tax with respect to any Company Employee Plan under Section 402(i) of ERISA or
Sections 4975 through 4980 of the Code.

               (e) Pension Plans. Company does not now, nor has it ever,
maintained, established, sponsored, participated in, or contributed to, any
Pension Plan which is subject to Title IV of ERISA or Section 412 of the Code.

               (f) Multiemployer Plans. At no time has Company contributed to or
been requested to contribute to any Multiemployer Plan.

               (g) No Post-Employment Obligations. No Company Employee Plan
provides, or has any liability to provide, retiree life insurance, retiree
health or other retiree employee welfare benefits to any person for any reason,
except as may be required by COBRA or other applicable statute, and Company has
never represented, promised or contracted (whether in oral or written form) to
any Employee (either individually or to Employees as a group) or any other
person that such Employee(s) or other person would be provided with retiree life
insurance, retiree health or other retiree employee welfare benefit, except to
the extent required by statute.

               (h) Neither Company nor any Affiliate has, prior to the Effective
Time, and in any material respect, violated any of the health care continuation
requirements of COBRA, the requirements of FMLA or any similar provisions of
state law applicable to its Employees.

               (i)    Effect of Transaction

                      (i) Except as set forth on Section 2.13(i) of the Company
Schedules, the execution of this Agreement and the consummation of the
transactions contemplated hereby will not (either alone or upon the occurrence
of any additional or subsequent events) constitute an event under any Company
Employee Plan, Employee Agreement, trust or loan that will or may result in any
payment (whether of severance pay or otherwise), acceleration, forgiveness of
indebtedness, vesting, distribution, increase in benefits or obligation to fund
benefits with respect to any Employee.

                      (ii) No payment or benefit which will or may be made by
Company or its Affiliates with respect to any Employee as a result of the
transactions contemplated by this Agreement will be characterized as an "excess
parachute payment," within the meaning of Section 280G(b)(1) of the Code.

               (j) Employment Matters. Company: (i) is in compliance in all
material respects with all applicable foreign, federal, state and local laws,
rules and regulations respecting employment, employment practices, terms and
conditions of employment and wages and hours, in each case, with respect to
Employees; (ii) has withheld all amounts required by law or by agreement to be
withheld from the wages, salaries and other payments to Employees, which amounts
are material individually or in the aggregate; (iii) is not liable for any
arrears of wages or any taxes or any penalty for failure to comply with any of
the foregoing; and (iv) is not liable for any material payment to any trust or
other fund or to any governmental or administrative authority, with respect to
unemployment compensation benefits, social security or other benefits or
obligations for Employees (other than routine payments to be made in the normal
course of business and consistent with past practice). There are no pending,
threatened or reasonably anticipated claims or actions against Company under any
worker's compensation policy or long-term disability policy. To Company's
knowledge, no employee of Company has violated any employment contract,
nondisclosure agreement or noncompetition agreement by which such employee is
bound due to such employee being employed by Company and disclosing to Company
or using trade secrets or proprietary information of any other person or entity.

               (k) Labor. No work stoppage or labor strike against Company is
pending, threatened or reasonably anticipated. Company does not know of any
activities or proceedings of any labor union to organize any Employees. There
are no actions, suits, claims, labor disputes or grievances pending, or, to the
knowledge of Company, threatened or reasonably anticipated relating to any
labor, safety or discrimination matters involving any Employee, including,
without limitation, charges of unfair labor practices or discrimination
complaints, which, if adversely determined, would, individually or in the
aggregate, result in any material liability to Company. Neither Company nor any
of its subsidiaries has engaged in any unfair


                                      -15-

<PAGE>   31
labor practices within the meaning of the National Labor Relations Act. Company
is not presently, nor has it been in the past, a party to, or bound by, any
collective bargaining agreement or union contract with respect to Employees and
no collective bargaining agreement is being negotiated by Company.

               (l) International Employee Plan. Each International Employee Plan
has been established, maintained and administered in material compliance with
its terms and conditions and with the requirements prescribed by any and all
statutory or regulatory laws that are applicable to such International Employee
Plan. Furthermore, no International Employee Plan has unfunded liabilities, that
as of the Effective Time, will not be offset by insurance or fully accrued.
Except as required by law, no condition exists that would prevent Company or
Parent from terminating or amending any International Employee Plan at any time
for any reason.

        2.14   Environmental Matters.

               (a) Hazardous Material. Except as would not result in material
liability to Company, no underground storage tanks and no amount of any
substance that has been designated by any Governmental Entity or by applicable
federal, state or local law to be radioactive, toxic, hazardous or otherwise a
danger to health or the environment, including, without limitation, PCBs,
asbestos, petroleum, urea-formaldehyde and all substances listed as hazardous
substances pursuant to the Comprehensive Environmental Response, Compensation,
and Liability Act of 1980, as amended, or defined as a hazardous waste pursuant
to the United States Resource Conservation and Recovery Act of 1976, as amended,
and the regulations promulgated pursuant to said laws, but excluding office and
janitorial supplies, (a "HAZARDOUS MATERIAL") are present, as a result of the
actions of Company or any of its subsidiaries or any affiliate of Company, or,
to Company's knowledge, as a result of any actions of any third party or
otherwise, in, on or under any property, including the land and the
improvements, ground water and surface water thereof, that Company or any of its
subsidiaries has at any time owned, operated, occupied or leased.

               (b) Hazardous Materials Activities. Except as would not result in
a material liability to Company (in any individual case or in the aggregate) (i)
neither Company nor any of its subsidiaries has transported, stored, used,
manufactured, disposed of, released or exposed its employees or others to
Hazardous Materials in violation of any law in effect on or before the Closing
Date, and (ii) neither Company nor any of its subsidiaries has disposed of,
transported, sold, used, released, exposed its employees or others to or
manufactured any product containing a Hazardous Material (collectively
"HAZARDOUS MATERIALS ACTIVITIES") in violation of any rule, regulation, treaty
or statute promulgated by any Governmental Entity in effect prior to or as of
the date hereof to prohibit, regulate or control Hazardous Materials or any
Hazardous Material Activity.

               (c) Permits. Company and its subsidiaries currently hold all
environmental approvals, permits, licenses, clearances and consents (the
"COMPANY ENVIRONMENTAL PERMITS") necessary for the conduct of Company's and its
subsidiaries' Hazardous Material Activities and other businesses of Company and
its subsidiaries as such activities and businesses are currently being
conducted.

               (d) Environmental Liabilities. No action, proceeding, revocation
proceeding, amendment procedure, writ or injunction is pending, and to Company's
knowledge, no action, proceeding, revocation proceeding, amendment procedure,
writ or injunction has been threatened by any Governmental Entity against
Company or any of its subsidiaries in a writing delivered to Company concerning
any Company Environmental Permit, Hazardous Material or any Hazardous Materials
Activity of Company or any of its subsidiaries. Company is not aware of any fact
or circumstance which could involve Company or any of its subsidiaries in any
environmental litigation or impose upon Company any material environmental
liability.

        2.15 Agreements, Contracts and Commitments. Except as otherwise set
forth in the Company Schedules, neither Company nor any of its subsidiaries is a
party to or is bound by:

               (a) any employment or consulting agreement, contract or
commitment with any officer or director or higher level employee or member of
Company's Board of Directors, other than those that are terminable by Company or
any


                                      -16-

<PAGE>   32
of its subsidiaries on no more than thirty days notice without liability or
financial obligation, except to the extent general principles of wrongful
termination law may limit Company's or any of its subsidiaries' ability to
terminate employees at will;

               (b) any agreement or plan, including, without limitation, any
stock option plan, stock appreciation right plan or stock purchase plan, any of
the benefits of which will be increased, or the vesting of benefits of which
will be accelerated, by the occurrence of any of the transactions contemplated
by this Agreement or the value of any of the benefits of which will be
calculated on the basis of any of the transactions contemplated by this
Agreement;

               (c) any agreement of indemnification or any guaranty other than
any agreement of indemnification entered into in connection with the sale or
license of software products in the ordinary course of business;

               (d) any agreement, contract or commitment containing any covenant
limiting in any respect the right of Company or any of its subsidiaries to
engage in any line of business or to compete with any person or granting any
exclusive distribution rights;

               (e) any agreement, contract or commitment currently in force
relating to the disposition or acquisition by Company or any of its subsidiaries
after the date of this Agreement of a material amount of assets not in the
ordinary course of business or pursuant to which Company has any material
ownership interest in any corporation, partnership, joint venture or other
business enterprise other than Company's subsidiaries;

               (f) any joint marketing or development agreement currently in
force under which Company or any of its subsidiaries have continuing material
obligations to jointly market any product, technology or service and which may
not be canceled without penalty upon notice of 90 days or less, or any material
agreement pursuant to which Company or any of its subsidiaries have continuing
material obligations to jointly develop any intellectual property that will not
be owned, in whole or in part, by Company or any of its subsidiaries and which
may not be canceled without penalty upon notice of 90 days or less; or

               (g) any agreement, contract or commitment currently in force to
license any third party to manufacture or reproduce any Company product, service
or technology except as a distributor in the normal course of business.

        Neither Company nor any of its subsidiaries, nor to Company's knowledge
any other party to a Company Contract (as defined below), is in breach,
violation or default under, and neither Company nor any of its subsidiaries has
received written notice that it has breached, violated or defaulted under, any
of the material terms or conditions of any of the agreements, contracts or
commitments to which Company or any of its subsidiaries is a party or by which
it is bound that are required to be disclosed in the Company Schedules pursuant
to clauses (a) through (h) above or pursuant to Section 2.9 hereof (any such
agreement, contract or commitment, a "COMPANY CONTRACT") in such a manner as
would permit any other party to cancel or terminate any such Company Contract,
or would permit any other party to seek material damages or other remedies (for
any or all of such breaches, violations or defaults, in the aggregate).

        2.16 Pooling of Interests. To the knowledge of Company, based on
consultation with its independent accountants, neither Company nor any of its
directors, officers, affiliates or stockholders has taken or agreed to take any
action which would preclude Parent's ability to account for the Merger as a
pooling of interests.

        2.17 Change of Control Payments. The Company Schedules set forth each
plan or agreement pursuant to which any amounts may become payable (whether
currently or in the future) to current or former officers and directors of
Company as a result of or in connection with the Merger.

        2.18 Statements; Proxy Statement/Prospectus. The information supplied by
Company for inclusion in the Registration Statement (as defined in Section
3.4(b)) shall not at the time the Registration Statement is filed with the SEC
and 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 in order to make the statements therein, in light of
the circumstances under which they are made, not misleading. The information
supplied by Company for inclusion in the proxy statement/prospectus to be sent
to (a) the stockholders of Company in connection with the meeting of Company's
stockholders


                                      -17-

<PAGE>   33
to consider the approval and adoption of this Agreement and the approval of the
Merger (the "COMPANY STOCKHOLDERS' MEETING") (such proxy statement/prospectus as
amended or supplemented is referred to herein as the "PROXY
STATEMENT/PROSPECTUS") shall not, on the date the Proxy Statement/Prospectus is
first mailed to Company's stockholders or at the time of the Company
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 light of the circumstances under which they
are made, not false or misleading; or omit to state any material fact necessary
to correct any statement in any earlier communication with respect to the
solicitation of proxies for the Company Stockholders' Meeting which has become
false or misleading. The Proxy Statement/Prospectus will comply as to form in
all material respects with the provisions of the Securities Act, the Exchange
Act and the rules and regulations thereunder. If at any time prior to the
Effective Time any event relating to Company or any of its affiliates, officers
or directors should be discovered by Company which is required to be set forth
in an amendment to the Registration Statement or a supplement to the Proxy
Statement/Prospectus, Company shall promptly inform Parent. Notwithstanding the
foregoing, Company makes no representation or warranty with respect to any
information supplied by Parent or Merger Sub which is contained in any of the
foregoing documents.

        2.19 Board Approval. The Board of Directors of Company has, as of the
date of this Agreement, determined (i) that the Merger is fair to, and in the
best interests of Company and its stockholders, and (ii) to recommend that the
stockholders of Company approve and adopt this Agreement and approve the Merger.

        2.20 Fairness Opinion. Company's Board of Directors has received a
written opinion from J. P. Morgan Securities Inc. dated as of the date hereof,
to the effect that as of the date hereof, the Merger and the Exchange Ratio are
fair to Company's stockholders from a financial point of view and has delivered
to Parent a copy of such opinion.

        2.21 Section 203 of the Delaware General Corporation Law Not Applicable.
The Board of Directors of Company has taken all actions so that the restrictions
contained in Section 203 of the Delaware General Corporation Law applicable to a
"business combination" (as defined in such Section 203) will not apply to the
execution, delivery or performance of this Agreement or to the consummation of
the Merger or the other transactions contemplated by this Agreement.

        2.22 Customs. Company has acted with reasonable care to properly value
and classify, in accordance with applicable tariff laws, rules and regulations,
all goods that Company or any of its subsidiaries import into the United States
or into any other country (the "IMPORTED GOODS"). To Company's knowledge, there
are currently no material claims pending against Company by the U.S. Customs
Service (or other foreign customs authorities) relating to the valuation,
classification or marking of the Imported Goods.


                                   ARTICLE III
                        REPRESENTATIONS AND WARRANTIES OF
                              PARENT AND MERGER SUB

        Parent and Merger Sub represent and warrant to Company, subject to the
exceptions specifically disclosed in writing in the disclosure letter and
referencing a specific representation supplied by Parent to Company dated as of
the date hereof and certified by a duly authorized officer of Parent (the
"PARENT SCHEDULES"), as follows:

        3.1    Organization of Parent and Merger Sub.

               (a) Each of Parent and Merger Sub (i) is a corporation duly
organized, validly existing and in good standing under the laws of the
jurisdiction in which it is organized; (ii) has the corporate or other power and
authority to own, lease and operate its assets and property and to carry on its
business as now being conducted; and (iii), except as would not be material to
Parent, is duly qualified or licensed to do business in each jurisdiction where
the character of the properties owned, leased or operated by it or the nature of
its activities makes such qualification or licensing necessary.

               (b) Parent has delivered or made available to Company a true and 
correct copy of the Certificate of Incorporation and Bylaws of Parent, each as
amended to date, and each such instrument is in full force and effect. Neither


                                      -18-

<PAGE>   34
Parent nor any of its subsidiaries is in violation of any of the provisions of
its Certificate of Incorporation or Bylaws or equivalent governing instruments.

        3.2 Parent and Merger Sub Capital Structure. The authorized capital
stock of Parent consists of 300,000,000 shares of Common Stock, of which there
were 69,920,883 shares issued and outstanding as of December 31, 1997, and
5,000,000 shares of Preferred Stock, of which one share of Series A Preferred
Stock is issued and outstanding. All outstanding shares of Parent Common Stock
are duly authorized, validly issued, fully paid and nonassessable and are not
subject to preemptive rights created by statute, the Articles of Incorporation
or Bylaws of Parent or any agreement or document to which Parent is a party or
by which it is bound. The authorized capital stock of Merger Sub consists of 100
shares of Common Stock, $0.01 par value, all of which, as of the date hereof,
are issued and outstanding and are held by Parent. Merger Sub was formed on or
about February 19, 1998, for the purpose of consummating the Merger and has no
material assets or liabilities except as necessary for such purpose.

        3.3    Authority.

               (a) Each of Parent and Merger Sub has all requisite corporate
power and authority to enter into, as applicable, this Agreement and to
consummate the transactions contemplated hereby and thereby. The execution and
delivery of this Agreement and the consummation of the transactions contemplated
hereby and thereby have been duly authorized by all necessary corporate action
on the part of Parent and Merger Sub, subject only to the filing of the
Certificate of Merger pursuant to Delaware Law. This Agreement has been duly
executed and delivered by each of Parent and Merger Sub and, assuming the due
authorization, execution and delivery by Company, constitutes the valid and
binding obligation of Parent and Merger Sub, enforceable against Parent and
Merger Sub in accordance with its terms, except as enforceability may be limited
by bankruptcy and other similar laws and general principles of equity. The
execution and delivery of this Agreement by each of Parent and Merger Sub does
not, and the performance of this Agreement by each of Parent and Merger Sub will
not, (i) conflict with or violate the Certificate of Incorporation or Bylaws of
Parent or Merger Sub, (ii) conflict with or violate any law, rule, regulation,
order, judgment or decree applicable to Parent or Merger Sub or by which any of
their respective properties is bound or affected or (iii) result in any material
breach of or constitute a material default (or an event that with notice or
lapse of time or both would become a material default) under, or impair Parent's
rights or alter the rights or obligations of any third party under, or give to
others any rights of termination, amendment, acceleration or cancellation of, or
result in the creation of a material lien or encumbrance on any of the material
properties or assets of Parent or Merger Sub pursuant to, any material note,
bond, mortgage, indenture, contract, agreement, lease, license, permit,
franchise or other instrument or obligation to which Parent or Merger Sub is a
party or by which Parent or Merger Sub or any of their respective properties are
bound or affected.

               (b) No consent, approval, order or authorization of, or
registration, declaration or filing with any Governmental Entity is required to
be obtained or made by Parent or Merger Sub in connection with the execution and
delivery of this Agreement or the consummation of the Merger, except for (i) the
filing of a Form S-4 (or any similar successor form thereto) Registration
Statement (the "REGISTRATION STATEMENT") with the SEC in accordance with the
Securities Act, (ii) the filing of the Certificate of Merger with the Secretary
of State of the State of Delaware, (iii) such consents, approvals, orders,
authorizations, registrations, declarations and filings as may be required under
applicable federal, foreign and state securities (or related) laws and the HSR
Act and the securities or antitrust laws of any foreign country, and (v) such
other consents, authorizations, filings, approvals and registrations which if
not obtained or made would not be material to Parent or Company or have a
material adverse effect on the ability of the parties hereto to consummate the
Merger.

        3.4    SEC Filings; Parent Financial Statements.

               (a) Parent has filed all forms, reports and documents required to
be filed by Parent with the SEC since January 1, 1997, and has made available to
Company such forms, reports and documents in the form filed with the SEC. All
such required forms, reports and documents (including those that Parent may file
subsequent to the date hereof) are referred to herein as the "PARENT SEC
REPORTS." As of their respective dates, the Parent SEC Reports (i) were prepared
in accordance with the requirements of the Securities Act or the Exchange Act,
as the case may be, and the rules and regulations of the SEC thereunder
applicable to such Parent SEC Reports, and (ii) did not at the time they were
filed (or if amended or superseded by a filing prior to the date of this
Agreement, then on the date of such filing) contain any untrue statement of a
material fact


                                      -19-

<PAGE>   35
or omit 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. None of Parent's subsidiaries is required
to file any forms, reports or other documents with the SEC.

               (b) The Company's revenue recognition practices and policies have
been and will be consistent with SOP 97-2. Each of the consolidated financial
statements (including, in each case, any related notes thereto) contained in the
Parent SEC Reports (the "PARENT FINANCIALS"), including any Parent SEC Reports
filed after the date hereof until the Closing, (i) complied as to form in all
material respects with the published rules and regulations of the SEC with
respect thereto, (ii) was prepared in accordance with GAAP applied on a
consistent basis throughout the periods involved (except as may be indicated in
the notes thereto or, in the case of unaudited interim financial statements, as
may be permitted by the SEC on Form 10-Q under the Exchange Act) and (iii)
fairly presented the consolidated financial position of Parent and its
subsidiaries as at the respective dates thereof and the consolidated results of
Parent's operations and cash flows for the periods indicated, except that the
unaudited interim financial statements may not contain footnotes and were or are
subject to normal and recurring year-end adjustments. The balance sheet of
Parent contained in Parent SEC Reports as of December 31, 1997 is hereinafter
referred to as the "PARENT BALANCE SHEET."

        3.5 Absence of Certain Changes or Events. Since the date of the Parent
Balance Sheet there has not been any Material Adverse Effect on Parent.

        3.6 Statements; Proxy Statement/Prospectus. The information supplied by
Parent for inclusion in the Registration Statement shall not at the time the
Registration Statement is filed with the SEC and 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 in order to make the statements therein, in light of the circumstances
under which they are made, not misleading. The information supplied by Parent
for inclusion in the Proxy Statement/Prospectus shall not, on the date the Proxy
Statement/Prospectus is first mailed to Company's stockholders or at the time of
the Company 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 light of the circumstances
under which they are made, not false or misleading; or omit to state any
material fact necessary to correct any statement in any earlier communication
with respect to the solicitation of proxies for the Company Stockholders'
Meeting which has become false or misleading. If at any time prior to the
Effective Time, any event relating to Parent or any of its affiliates, officers
or directors should be discovered by Parent which is required to be set forth in
an amendment to the Registration Statement or a supplement to the Proxy
Statement/Prospectus, Parent shall promptly inform Company. Notwithstanding the
foregoing, Parent makes no representation or warranty with respect to any
information supplied by Company which is contained in any of the foregoing
documents.

        3.7 Valid Issuance. The Parent Common Stock to be issued in the Merger,
when issued in accordance with the provisions of this Agreement: (a) will be
validly issued, fully paid and nonassessable; and (b) will not be subject to any
restrictions on resale under the Securities Act, other than restrictions imposed
by Rule 145 promulgated under the Securities Act.


                                   ARTICLE IV
                       CONDUCT PRIOR TO THE EFFECTIVE TIME

        4.1 Conduct of Business by Company. During the period from the date of
this Agreement and continuing until the earlier of the termination of this
Agreement pursuant to its terms or the Effective Time, Company and each of its
subsidiaries shall, except to the extent that Parent shall otherwise consent in
writing, carry on its business, in all material respects, in the usual, regular
and ordinary course, in substantially the same manner as heretofore conducted
and in compliance with all applicable laws and regulations, pay its debts and
taxes when due subject to good faith disputes over such debts or taxes, pay or
perform other material obligations when due, and use its commercially reasonable
efforts consistent with past practices and policies to (i) preserve intact its
present business organization, (ii) keep available the services of its present
officers and employees and (iii) preserve its relationships with customers,
suppliers, distributors, licensors, licensees,


                                      -20-

<PAGE>   36
and others with which it has business dealings. In addition, Company will
promptly notify Parent of any material event involving its business or
operations.

        In addition, except as permitted by the terms of this Agreement, and
except as provided in Article 4 of the Company Schedules, without the prior
written consent of Parent, during the period from the date of this Agreement and
continuing until the earlier of the termination of this Agreement pursuant to
its terms or the Effective Time, Company shall not do any of the following and
shall not permit its subsidiaries to do any of the following:

               (a) Waive any stock repurchase rights, accelerate, amend or
change the period of exercisability of options or restricted stock, or reprice
options granted under any employee, consultant, director or other stock plans or
authorize cash payments in exchange for any options granted under any of such
plans;

               (b) Grant any severance or termination pay to any officer or
employee except pursuant to written agreements outstanding, or policies
existing, on the date hereof and as previously disclosed in writing or made
available to Parent, or adopt any new severance plan;

               (c) Transfer or license to any person or entity or otherwise
extend, amend or modify in any material respect any rights to the Company
Intellectual Property, or enter into grants to future patent rights, other than
non-exclusive licenses in the ordinary course of business and consistent with
past practice;

               (d) Declare, set aside or pay any dividends on or make any other
distributions (whether in cash, stock, equity securities or property) in respect
of any capital stock or split, combine or reclassify any capital stock or issue
or authorize the issuance of any other securities in respect of, in lieu of or
in substitution for any capital stock;

               (e) Purchase, redeem or otherwise acquire, directly or
indirectly, any shares of capital stock of Company or its subsidiaries, except
repurchases issued shared at fair market value in connection with employees
exercised of options pursuant to the Company's Stock Option Plan of unvested
shares at cost in connection with the termination of the employment relationship
with any employee pursuant to stock option or purchase agreements in effect on
the date hereof;

               (f) Issue, deliver, sell, authorize, pledge or otherwise encumber
or propose any of the foregoing of, any shares of capital stock or any
securities convertible into shares of capital stock, or subscriptions, rights,
warrants or options to acquire any shares of capital stock or any securities
convertible into shares of capital stock, or enter into other agreements or
commitments of any character obligating it to issue any such shares or
convertible securities, other than the issuance delivery and/or sale of (i)
shares of Company Common Stock pursuant to the exercise of stock options
therefor outstanding as of the date of this Agreement, and (ii) shares of
Company Common Stock issuable to participants in the ESPP consistent with the
terms thereof;

               (g) Cause, permit or propose any amendments to its Certificate of
Incorporation, Bylaws or other charter documents (or similar governing
instruments of any of its subsidiaries);

               (h) Acquire or agree to acquire by merging or consolidating with,
or by purchasing any equity interest in or a portion of the assets of, or by any
other manner, any business or any corporation, partnership, association or other
business organization or division thereof, or otherwise acquire or agree to
acquire any assets which are material, individually or in the aggregate, to the
business of Company or enter into any material joint ventures, strategic
partnerships or alliances;

               (i) Sell, lease, license, encumber or otherwise dispose of any
properties or assets which are material, individually or in the aggregate, to
the business of Company, except sales of inventory in the ordinary course of
business consistent with past practice;

               (j) Incur any indebtedness for borrowed money or guarantee any
such indebtedness of another person, issue or sell any debt securities or
options, warrants, calls or other rights to acquire any debt securities of
Company, enter into any "keep well" or other agreement to maintain any financial
statement condition or enter into any arrangement having the


                                      -21-

<PAGE>   37
economic effect of any of the foregoing other than (i) in connection with the
financing of ordinary course trade payables consistent with past practice or
(ii) pursuant to existing credit facilities in the ordinary course of business;

               (k) Adopt or amend any employee benefit plan or employee stock
purchase or employee stock option plan, or enter into any employment contract or
collective bargaining agreement (other than offer letters and letter agreements
entered into in the ordinary course of business consistent with past practice
with employees who are terminable "at will,"), pay any special bonus or special
remuneration to any director or employee, or increase the salaries or wage rates
or fringe benefits (including rights to severance or indemnification) of its
directors, officers, employees or consultants other than in the ordinary course
of business, consistent with past practice, or change in any material respect
any management policies or procedures;

               (l) Make any payments outside of the ordinary course of business
in excess of $250,000;

               (m) except in the ordinary course of business, modify, amend or
terminate any material contract or agreement to which Company or any subsidiary
thereof is a party or waive, release or assign any material rights or claims
thereunder;

               (n) enter into any contracts, agreements, or obligations relating
to the distribution, sale, license or marketing by third parties of Company's
products or products licensed by Company other than in the ordinary course of
business consistent with past practice;

               (o) materially revalue any of its assets or, except as required
by GAAP, make any change in accounting methods, principles or practices;

               (p) Take any action that would be reasonably likely to interfere
with Parent's ability to account for the Merger as a pooling of interests
whether or not otherwise permitted by the provisions of this Article IV;

               (q) Engage in any action with the intent to directly or
indirectly adversely impact any of the transactions contemplated by this
Agreement; or

               (r) Agree in writing or otherwise to take any of the actions
described in Article 4 (a) through (q) above.

        4.2 Conduct of Business by Parent. During the period from the date of
this Agreement and continuing until the earlier of the termination of this
Agreement pursuant to its terms or the Effective Time, except as permitted by
the terms of this Agreement and except as provided in Article 4 of the Parent
Schedules, without the prior written consent of Company (which consent shall not
be unreasonably withheld), during the period from the date of this Agreement and
continuing until the earlier of the termination of this Agreement pursuant to
its terms or the Effective Time, Parent shall not do any of the following:

               (a) Declare, set aside or pay any dividends on or make any other
distributions (whether in cash, stock, equity securities or property) in respect
of any capital stock or split, combine or reclassify any capital stock or issue
or authorize the issuance of any other securities in respect of, in lieu of or
in substitution for any capital stock;

               (b) Take any action that would be reasonably likely to interfere
with Parent's ability to account for the Merger as a pooling of interests; or

               (c) Acquire or enter into any agreement to acquire a majority of
the voting securities or substantially all of the assets of any corporation or
other business entity (other than Company), whether by merger, consolidation,
stock tender or otherwise, provided, however, that nothing herein shall prevent
Parent from doing any of the foregoing until such time as the consideration paid
by Parent (as determined in good faith by the Board of Directors of Parent as of
the time such acquisition is approved by such Board or as of such other time as
such Board may determine) to acquire such voting securities or assets (in any
individual case or in the aggregate) shall exceed $300,000,000.


                                      -22-

<PAGE>   38
                                    ARTICLE V
                              ADDITIONAL AGREEMENTS

        5.1 Proxy Statement/Prospectus; Registration Statement; Other Filings;
Board Recommendations.

               (a) As promptly as practicable after the execution of this
Agreement, Company and Parent will prepare, and file with the SEC, the Proxy
Statement/Prospectus and Parent will prepare and file with the SEC the
Registration Statement in which the Proxy Statement/Prospectus will be included
as a prospectus. Each of Company and Parent will respond to any comments of the
SEC, will use its respective commercially reasonable efforts to have the
Registration Statement declared effective under the Securities Act as promptly
as practicable after such filing and Company will cause the Proxy
Statement/Prospectus to be mailed to its stockholders at the earliest
practicable time after the Registration Statement is declared effective by the
SEC. As promptly as practicable after the date of this Agreement, each of
Company and Parent will prepare and file any other filings required to be filed
by it under the Exchange Act, the Securities Act or any other Federal, foreign
or Blue Sky or related laws relating to the Merger and the transactions
contemplated by this Agreement (the "OTHER FILINGS"). Each of Company and Parent
will notify the other promptly upon the receipt of any comments from the SEC or
its staff or any other government officials and of any request by the SEC or its
staff or any other government officials for amendments or supplements to the
Registration Statement, the Proxy Statement/Prospectus or any Other Filing or
for additional information and will supply the other with copies of all
correspondence between such party or any of its representatives, on the one
hand, and the SEC, or its staff or any other government officials, on the other
hand, with respect to the Registration Statement, the Proxy
Statement/Prospectus, the Merger or any Other Filing. Each of Company and Parent
will cause all documents that it is responsible for filing with the SEC or other
regulatory authorities under this Section 5.1(a) to comply in all material
respects with all applicable requirements of law and the rules and regulations
promulgated thereunder. Whenever any event occurs which is required to be set
forth in an amendment or supplement to the Proxy Statement/Prospectus, the
Registration Statement or any Other Filing, Company or Parent, as the case may
be, will promptly inform the other of such occurrence and cooperate in filing
with the SEC or its staff or any other government officials, and/or mailing to
stockholders of Company, such amendment or supplement.

               (b) The Proxy Statement/Prospectus will include the
recommendation of the Board of Directors of Company in favor of adoption and
approval of this Agreement and approval of the Merger.

        5.2 Meeting of Company Stockholders. Promptly after the date hereof,
Company will take all action necessary in accordance with the Delaware Law and
its Certificate of Incorporation and Bylaws to convene the Company Stockholders'
Meeting to be held as promptly as practicable, and in any event (to the extent
permissible under applicable law) within 45 days after the declaration of
effectiveness of the Registration Statement, for the purpose of voting upon this
Agreement and the Merger or the issuance of shares of Parent Common Stock
pursuant to the Merger, respectively. Company will use its commercially
reasonable efforts to solicit from its stockholders proxies in favor of the
adoption and approval of this Agreement and the approval of the Merger and will
take all other action necessary or advisable to secure the vote or consent of
its stockholders required by the rules of Nasdaq or Delaware Law to obtain such
approvals.

        5.3    Confidentiality; Access to Information.

               (a) The parties acknowledge that Company and Parent have
previously executed a Mutual Confidentiality Agreement, dated as of February 4,
1998 (the "CONFIDENTIALITY AGREEMENT"), which Confidentiality Agreement will
continue in full force and effect in accordance with its terms.

               (b) Access to Information. Each of Company and Parent will afford
the other and the other's accountants, counsel and other representatives
reasonable access during normal business hours to their properties, books,
records and personnel and during the period prior to the Effective Time to
obtain all information concerning the business, including the status of product
development efforts, properties, results of their operations and personnel, as
the other may reasonably request. No information or knowledge obtained by Parent
in any investigation pursuant to this Section 5.3 will affect or be deemed to
modify any representation or warranty contained herein or the conditions to the
obligations of the parties to consummate the Merger.


                                      -23-

<PAGE>   39
        5.4    No Solicitation.

               (a) From and after the date of this Agreement until the Effective
Time or termination of this Agreement pursuant to its terms Company and its
subsidiaries will not, nor will they authorize or permit any of their respective
officers or directors or employees or any investment banker, attorney or other
advisor or representative retained by any of them to, directly or indirectly,
(i) solicit, initiate or encourage the submission of any Acquisition Proposal
(as hereinafter defined) or (ii) participate in any discussions or negotiations
regarding, or furnish to any person any non-public information with respect to,
or take any other action to facilitate any inquiries or the making of any
proposal that constitutes or may reasonably be expected to lead to, any
Acquisition Proposal. Company and its subsidiaries will immediately cease any
and all existing activities, discussions or negotiations with any parties
conducted heretofore with respect to any Acquisition Proposal. Without limiting
the foregoing, it is understood that any action taken by any officer, director
or employee of Company or any of its subsidiaries or any investment banker,
attorney or other advisor or representative of Company or any of its
subsidiaries that if taken by the Company would constitute a breach by the
Company of the immediately preceding two sentences shall be deemed to be a
breach of this Section 5.4 by Company. For purposes of this Agreement,
"ACQUISITION PROPOSAL" means any inquiry, proposal or offer from any person or
"group" (as defined under Section 13(d) of the Exchange Act and the rules and
regulations thereunder) relating to any direct or indirect acquisition or
purchase of a substantial amount of assets of Company or any of its subsidiaries
(other than the purchase of Company's products in the ordinary course of
business) or more than a 20% interest in the total voting securities of Company
or any of its subsidiaries or any tender offer or exchange offer that if
consummated would result in any person or "group" (as defined under Section
13(d) of the Exchange Act and the rules and regulations thereunder) beneficially
owning 20% or more of the total voting securities of Company or any of its
subsidiaries or any merger, consolidation, business combination, sale of
substantially all the assets, recapitalization, liquidation, dissolution or
similar transaction involving Company or any of its subsidiaries, other than the
transactions contemplated by this Agreement.

               (b) Neither the Board of Directors of Company nor any committee
thereof shall (i) withdraw or modify, or propose publicly to withdraw or modify,
in a manner adverse to Parent or Merger Sub, the approval or recommendation by
such Board of Directors or any such committee of this Agreement or the Merger or
(ii) cause Company to enter into any letter of intent, agreement in principle,
acquisition agreement or other similar agreement (an "ACQUISITION AGREEMENT")
with respect to any Acquisition Proposal. In addition, from and after the date
of this Agreement until the earlier of the Effective Time and termination of
this Agreement pursuant to its terms, Company and its subsidiaries will not, nor
will they authorize or permit any of their respective officers, directors or
employees or any investment banker, attorney or other advisor or representative
retained by any of them to, directly or indirectly, make or authorize any public
statement, recommendation or solicitation in support of any Acquisition
Proposal.

               (c) In addition to the obligations of Company set forth in
paragraphs (a) and (b) of this Section 5.4, Company as promptly as practicable
shall advise Parent orally and in writing of any request for non-public
information which Company reasonably believes would lead to an Acquisition
Proposal or of any Acquisition Proposal, or any inquiry with respect to or which
Company reasonably should believe would lead to any Acquisition Proposal, the
material terms and conditions of such request, Acquisition Proposal or inquiry,
and the identity of the person making any such request, Acquisition Proposal or
inquiry. Company will keep Parent informed in all material respects of the
status and details (including material amendments or proposed amendments) of any
such request, Acquisition Proposal or inquiry.

               (d) Nothing contained in this Section 5.4 or elsewhere in this
Agreement shall prohibit Company from (i) taking and disclosing to its
stockholders a position contemplated by Rules 14d-9 and 14e-2(a) promulgated
under the Exchange Act or (ii) making any disclosure to Company's stockholders
if, in the good faith judgment of the majority of the members of the Board of
Directors of Company, after consultation with independent legal counsel, failure
to so disclose would be inconsistent with applicable laws; provided that none of
Company nor its Board of Directors nor any committee thereof shall withdraw or
modify, or publicly propose to withdraw or modify, its position with respect to
this Agreement or the Merger or approve or recommend, or propose to approve or
recommend, an Acquisition Proposal.

        5.5 Public Disclosure. Parent and Company will consult with each other,
and to the extent practicable, agree, before issuing any press release or
otherwise making any public statement with respect to the Merger, this Agreement
or an Acquisition Proposal and will not issue any such press release or make any
such public statement prior to such consultation,


                                      -24-

<PAGE>   40
except as may be required by law or any listing agreement with a national
securities exchange. The parties have agreed to the text of the joint press
release announcing the signing of this Agreement.

        5.6    Reasonable Efforts; Notification.

               (a) Upon the terms and subject to the conditions set forth in
this Agreement, each of the parties agrees to use all 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 to consummate and make effective, in the most expeditious
manner practicable, the Merger and the other transactions contemplated by this
Agreement, including using reasonable efforts to accomplish the following: (i)
the taking of all reasonable acts necessary to cause the conditions precedent
set forth in Article VI to be satisfied, (ii) the obtaining of all necessary
actions or nonactions, waivers, consents, approvals, orders and authorizations
from Governmental Entities and the making of all necessary registrations,
declarations and filings (including registrations, declarations and filings with
Governmental Entities, if any) and the taking of all reasonable steps as may be
necessary to avoid any suit, claim, action, investigation or proceeding by any
Governmental Entity, (iii) the obtaining of all necessary consents, approvals or
waivers from third parties, (iv) the defending of any suits, claims, actions,
investigations or proceedings, whether judicial or administrative, challenging
this Agreement or the consummation of the transactions contemplated hereby,
including seeking to have any stay or temporary restraining order entered by any
court or other Governmental Entity vacated or reversed and (v) the execution or
delivery of any additional instruments necessary to consummate the transactions
contemplated by, and to fully carry out the purposes of, this Agreement. In
connection with and without limiting the foregoing, Company and its Board of
Directors shall, if any state takeover statute or similar statute or regulation
is or becomes applicable to the Merger, this Agreement or any of the
transactions contemplated by this Agreement, use all reasonable efforts to
ensure that the Merger and the other transactions contemplated by this Agreement
may be consummated as promptly as practicable on the terms contemplated by this
Agreement and otherwise to minimize the effect of such statute or regulation on
the Merger, this Agreement and the transactions contemplated hereby.
Notwithstanding anything herein to the contrary, nothing in this Agreement shall
be deemed to require Parent or Company or any subsidiary or affiliate thereof to
agree to any divestiture by itself or any of its affiliates of shares of capital
stock or of any business, assets or property, or the imposition of any material
limitation on the ability of any of them to conduct theirbusinesses or to own or
exercise control of such assets, properties and stock.

               (b) Company shall give prompt notice to Parent of any
representation or warranty made by it contained in this Agreement becoming
untrue or inaccurate, or any failure of Company to comply with or satisfy in any
material respect any covenant, condition or agreement to be complied with or
satisfied by it under this Agreement, in each case, such that the conditions set
forth in Section 6.3(a) or 6.3(b) would not be satisfied, provided, however,
that no such notification shall affect the representations, warranties,
covenants or agreements of the parties or the conditions to the obligations of
the parties under this Agreement.

               (c) Parent shall give prompt notice to Company of any
representation or warranty made by it or Merger Sub contained in this Agreement
becoming untrue or inaccurate, or any failure of Parent or Merger Sub to comply
with or satisfy in any material respect any covenant, condition or agreement to
be complied with or satisfied by it under this Agreement, in each case, such
that the conditions set forth in Section 6.2(a) or 6.2(b) would not be
satisfied, provided, however, that no such notification shall affect the
representations, warranties, covenants or agreements of the parties or the
conditions to the obligations of the parties under this Agreement.

        5.7 Third Party Consents. As soon as practicable following the date
hereof, Parent and Company will each use its commercially reasonable efforts to
obtain any consents, waivers and approvals under any of its or its subsidiaries'
respective agreements, contracts, licenses or leases required to be obtained in
connection with the consummation of the transactions contemplated hereby.

        5.8    Stock Options and Employee Benefits.

               (a) At the Effective Time, each outstanding option to purchase
shares of Company Common Stock (each a "COMPANY STOCK OPTION") under the Company
Stock Option Plans, whether or not exercisable, will be assumed by Parent. Each
Company Stock Option so assumed by Parent under this Agreement will continue to
have, and be subject to,


                                      -25-

<PAGE>   41
the same terms and conditions set forth in the applicable Company Stock Option
Plan immediately prior to the Effective Time (including, without limitation, any
repurchase rights or vesting provisions), except that (i) each Company Stock
Option will be exercisable (or will become exercisable in accordance with its
terms) for that number of whole shares of Parent Common Stock equal to the
product of the number of shares of Company Common Stock that were issuable upon
exercise of such Company Stock Option immediately prior to the Effective Time
multiplied by the Exchange Ratio, rounded down to the nearest whole number of
shares of Parent Common Stock and (ii) the per share exercise price for the
shares of Parent Common Stock issuable upon exercise of such assumed Company
Stock Option will be equal to the quotient determined by dividing the exercise
price per share of Company Common Stock at which such Company Stock Option was
exercisable immediately prior to the Effective Time by the Exchange Ratio,
rounded up to the nearest whole cent.

               (b) It is intended that Company Stock Options assumed by Parent
shall qualify following the Effective Time as incentive stock options as defined
in Section 422 of the Code to the extent Company Stock Options qualified as
incentive stock options immediately prior to the Effective Time and the
provisions of this Section 5.8 shall be applied consistent with such intent.

               (c) At the Effective Time, each outstanding purchase right (an
"Assumed Purchase Right") under the ESPP shall be deemed to constitute a
purchase right to acquire, on the same terms and conditions as were applicable
under the ESPP immediately prior to the Effective Time, a number of shares of
Parent Common Stock determined as provided in the ESPP except that the purchase
price of such shares of Parent Common Stock under each Assumed Purchase Right
shall be the lower of (i) the quotient determined by dividing eighty-five
percent (85%) of the fair market value of the Company Common Stock on the
offering date of each assumed offering by the Exchange Ratio or (ii) eighty-five
percent (85%) of the fair market value of the Parent Common Stock on each
exercise date of the assumed offering occurring after the Effective Time. As
soon as practicable after the Effective Time, Parent shall deliver to the
participants in the ESPP appropriate notice setting forth such participants'
rights pursuant thereto and that the purchase rights pursuant to the ESPP shall
continue in effect on the same terms and conditions.

        5.9 Form S-8. Parent agrees to file a registration statement on Form S-8
for the shares of Parent Common Stock issuable with respect to assumed Company
Stock Options and Assumed Purchase Right within five days after the Effective
Time and intends to maintain the effectiveness of such registration statement
thereafter for so long as any of such options or other rights remain
outstanding.

        5.10   Indemnification.

               (a) From and after the Effective Time, Parent will and will cause
the Surviving Corporation to fulfill and honor in all respects the obligations
of Company pursuant to any indemnification agreements between Company and its
directors and officers as of the Effective Time (the "INDEMNIFIED PARTIES") and
any indemnification provisions under Company's Certificate of Incorporation or
Bylaws as in effect on the date hereof. The Certificate of Incorporation and
By-laws of the Surviving Corporation will contain provisions with respect to
exculpation and indemnification that are at least as favorable to the
Indemnified Parties as those contained in the Certificate of Incorporation and
Bylaws of Company as in effect on the date hereof, which provisions will not be
amended, repealed or otherwise modified for a period of six years from the
Effective Time in any manner that would adversely affect the rights thereunder
of individuals who, immediately prior to the Effective Time, were directors,
officers, employees or agents of Company, unless such modification is required
by law. The foregoing parties are expressly made third party beneficiaries to
the provisions of this Section 5.10.

               (b) For a period of six years after the Effective Time, Parent
will cause the Surviving Corporation to use its commercially reasonable efforts
to maintain in effect, if available, directors' and officers' liability
insurance covering those persons who are currently covered by Company's
directors' and officers' liability insurance policy on terms comparable to those
applicable to the current directors and officers of Company; provided, however,
that in no event will Parent or the Surviving Corporation be required to expend
annual premiums in excess of $200,000 for such coverage (or such coverage as is
available for such annual premium of $200,000).

        5.11 Nasdaq Listing. Parent agrees to authorize for listing on Nasdaq
the shares of Parent Common Stock issuable, and those required to be reserved
for issuance, in connection with the Merger, upon official notice of issuance.


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<PAGE>   42
        5.12 Company Affiliate Agreement. Set forth on the Company Schedules is
a list of those persons who may be deemed to be, in Company's reasonable
judgment, affiliates of Company within the meaning of Rule 145 promulgated under
the Securities Act (each a "COMPANY AFFILIATE"). Company will provide Parent
with such information and documents as Parent reasonably requests for purposes
of reviewing such list. Company will use its commercially reasonable efforts to
deliver or cause to be delivered to Parent, as promptly as practicable on or
following the date hereof, from each Company Affiliate an executed affiliate
agreement in substantially the form attached hereto as Exhibit C (the "COMPANY
AFFILIATE AGREEMENT"), each of which will be in full force and effect as of the
Effective Time. Parent will be entitled to place appropriate legends on the
certificates evidencing any Parent Common Stock to be received by a Company
Affiliate pursuant to the terms of this Agreement, and to issue appropriate stop
transfer instructions to the transfer agent for the Parent Common Stock,
consistent with the terms of the Company Affiliate Agreement. The Company will
also use reasonable effort to cause Steve Smaha to execute a Company Voting
Agreement.

        5.13 Regulatory Filings; Reasonable Efforts. As soon as may be
reasonably practicable, Company and Parent each shall file with the United
States Federal Trade Commission (the "FTC") and the Antitrust Division of the
United States Department of Justice ("DOJ") Notification and Report Forms
relating to the transactions contemplated herein as required by the HSR Act, as
well as comparable pre-merger notification forms required by the merger
notification or control laws and regulations of any applicable jurisdiction, as
agreed to by the parties. Company and Parent each shall promptly (a) supply the
other with any information which may be required in order to effectuate such
filings and (b) supply any additional information which reasonably may be
required by the FTC, the DOJ or the competition or merger control authorities of
any other jurisdiction and which the parties may reasonably deem appropriate.


                                   ARTICLE VI
                            CONDITIONS TO THE MERGER

        6.1 Conditions to Obligations of Each Party to Effect the Merger. The
respective obligations of each party to this Agreement to effect the Merger
shall be subject to the satisfaction at or prior to the Closing Date of the
following conditions:

               (a) Company Stockholder Approval. This Agreement shall have been
approved and adopted, and the Merger shall have been duly approved, by the
requisite vote under applicable law, by the stockholders of Company.

               (b) Registration Statement Effective; Proxy Statement; Nasdaq
Listing. The SEC shall have declared the Registration Statement effective. No
stop order suspending the effectiveness of the Registration Statement or any
part thereof shall have been issued and no proceeding for that purpose, and no
similar proceeding in respect of the Proxy Statement/Prospectus, shall have been
initiated or threatened in writing by the SEC. The shares to be issued in the
Merger and under the Company Stock Plan shall be approved for listing on the
Nasdaq National Market.

               (c) No Order; HSR Act. No Governmental Entity 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 has the effect of making
the Merger illegal or otherwise prohibiting consummation of the Merger. All
waiting periods, if any, under the HSR Act relating to the transactions
contemplated hereby will have expired or terminated early and all material
foreign antitrust approvals required to be obtained prior to the Merger in
connection with the transactions contemplated hereby shall have been obtained.

               (d) Tax Opinions. Parent and Company shall each have received
written opinions from their respective tax counsel (Wilson Sonsini Goodrich &
Rosati, Professional Corporation, and Piper & Marbury, L.L.P., respectively), in
form and substance reasonably satisfactory to them, to the effect that the
Merger will constitute a reorganization within the meaning of Section 368(a) of
the Code and that each of Parent, Merger Sub and Company shall be treated as a
party to this Agreement and such opinions shall not have been withdrawn;
provided, however, that if the counsel to either Parent or Company does not
render such opinion, this condition shall nonetheless be deemed to be satisfied
with respect to such party if counsel to the other party renders such opinion to
such party. The parties to this Agreement agree to make such reasonable
representations as requested by such counsel for the purpose of rendering such
opinions.


                                      -27-

<PAGE>   43
        6.2 Additional Conditions to Obligations of Company. The obligation of
Company to consummate and effect the Merger shall be subject to the satisfaction
at or prior to the Closing Date of each of the following conditions, any of
which may be waived, in writing, exclusively by Company:

               (a) Representations and Warranties. The representations and
warranties of Parent and Merger Sub contained in this Agreement (i) shall have
been true and correct in all material respects as of the date of this Agreement
and (ii) shall be true and correct in all material respects on and as of the
Closing Date except for changes contemplated by this Agreement and except for
those representations and warranties which address matters only as of a
particular date (which shall have been true and correct as of such particular
date), with the same force and effect as if made on and as of the Closing Date.
Solely for the purpose of the application of clause (ii) above, all
representations and warranties of Parent set forth in this Agreement that are
qualified as to materiality (including without limitation by the word "material"
in the phrases "material adverse change" or "material adverse effect") shall be
deemed to be not so qualified. Company shall have received a certificate with
respect to the foregoing signed on behalf of Parent by an authorized officer of
Parent.

               (b) Agreements and Covenants. Parent and Merger Sub 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 them on or prior
to the Closing Date, and Company shall have received a certificate to such
effect signed on behalf of Parent by an authorized officer of Parent.

               (c) Material Adverse Effect. No Material Adverse Effect with
respect to Parent shall have occurred since the date of this Agreement.

        6.3 Additional Conditions to the Obligations of Parent and Merger Sub.
The obligations of Parent and Merger Sub to consummate and effect the Merger
shall be subject to the satisfaction at or prior to the Closing Date of each of
the following conditions, any of which may be waived, in writing, exclusively by
Parent:

               (a) Representations and Warranties. The representations and
warranties of Company contained in this Agreement (i) shall have been true and
correct in all material respects as of the date of this Agreement and (ii) shall
be true and correct in all material respects on and as of the Closing Date
except for changes contemplated by this Agreement and except for those
representations and warranties which address matters only as of a particular
date (which shall have been true and correct as of such particular date), with
the same force and effect as if made on and as of the Closing Date, except, with
regard to the foregoing clauses (i) and (ii), in such cases (other than the
representations in Sections 2.2, 2.3, 2.20 and 2.21) where the failure to be so
true and correct would not have a Material Adverse Effect on Company. Solely for
the purpose of the application of clause (ii) above, all representations and
warranties of Company set forth in this Agreement that are qualified as to
materiality (including without limitation by the word "material" in the phrases
"material adverse change" or "material adverse effect") shall be deemed to be
not so qualified. Parent shall have received a certificate with respect to the
foregoing signed on behalf of Company by an authorized officer of Company.

               (b) Agreements and Covenants. 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 at or prior to the Closing
Date, and Parent shall have received a certificate to such effect signed on
behalf of Company by the Chief Executive Officer and the Chief Financial Officer
of Company.

               (c) Material Adverse Effect. No Material Adverse Effect with
respect to Company shall have occurred since the date of this Agreement.

               (d) Noncompetition Agreements. Stephen T. Walker shall have
entered into a Noncompetition Agreement substantially in the form attached
hereto as Exhibit D and such agreement shall be in full force and effect.

               (e) Affiliate Agreements. Each of the Company Affiliates shall
have entered into the Company Affiliate Agreement and each of such agreements
will be in full force and effect as of the Effective Time.


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<PAGE>   44
               (f) Opinion of Accountants. Parent shall have received letters
from each of Coopers & Lybrand L.L.P. and Ernst & Young LLP, respectively, dated
within two (2) business days prior to the Effective Time, regarding that firm's
concurrence with Parent's management's and Company's management's conclusions as
to the appropriateness of pooling of interest accounting for the Merger under
Accounting Principles Board Opinion No. 16, if the Merger is consummated in
accordance with this Agreement.

               (g) Consents. Company shall have obtained all consents, waivers
and approvals required in connection with the consummation of the transactions
contemplated hereby in connection with the agreements, contracts, licenses or
leases set forth on Schedule 6.3(g).


                                   ARTICLE VII
                        TERMINATION, AMENDMENT AND WAIVER

        7.1 Termination. This Agreement may be terminated at any time prior to
the Effective Time, whether before or after the requisite approvals of the
stockholders of Company or Parent:

               (a) by mutual written consent duly authorized by the Boards of
Directors of Parent and Company;

               (b) by either Company or Parent if the Merger shall not have been
consummated by July 31, 1998 for any reason; provided, however, that the right
to terminate this Agreement under this Section 7.1(b) shall not be available to
any party whose action or failure to act has been a principal cause of or
resulted in the failure of the Merger to occur on or before such date and such
action or failure to act constitutes a breach of this Agreement;

               (c) by either Company or Parent if a Governmental Entity shall
have issued an order, decree or ruling or taken any other action, in any case
having the effect of permanently restraining, enjoining or otherwise prohibiting
the Merger, which order, decree, ruling or other action is final and
nonappealable;

               (d) by either Company or Parent if the required approval of the
stockholders of Company contemplated by this Agreement shall not have been
obtained by reason of the failure to obtain the required vote at a meeting of
Company stockholders duly convened therefor or at any adjournment thereof
(provided that the right to terminate this Agreement under this Section 7.1(d)
shall not be available to Company where the failure to obtain Company
stockholder approval shall have been caused by the action or failure to act of
Company and such action or failure to act constitutes a breach by Company of
this Agreement);

               (e) by Parent if (i) the Board of Directors of Company or any
committee thereof shall have withdrawn or modified in a manner adverse to Parent
its approval or recommendation of the Merger or this Agreement, (ii) Company
shall have failed to include in the Proxy Statement/Prospectus the
recommendation of the Board of Directors of Company in favor of approval of the
Merger and this Agreement, (iii) the Board of Directors of Company shall have
failed to reconfirm such recommendation within five business days after a
written request to do so, (iv) the Board of Directors of Company or any
committee thereof shall have recommended any Acquisition Proposal, (v) the Board
of Directors of Company or any committee thereof shall have resolved to do any
of the foregoing or (vi) the Company or any of its officers or directors shall
participate in any discussions or negotiations in breach of Section 5.4;

               (f) by Company, upon a breach of any representation, warranty,
covenant or agreement on the part of Parent set forth in this Agreement, or if
any representation or warranty of Parent shall have become untrue, in either
case such that the conditions set forth in Section 6.2(a) or Section 6.2(b)
would not be satisfied as of the time of such breach or as of the time such
representation or warranty shall have become untrue, provided that if such
inaccuracy in Parent's representations and warranties or breach by Parent is
curable by Parent through the exercise of its commercially reasonable efforts,
then Company may not terminate this Agreement under this Section 7.1(f) for
thirty days after delivery of written notice from Company to Parent of such
breach, provided Parent continues to exercise commercially reasonable efforts to
cure such breach (it being understood that Company may not terminate this
Agreement pursuant to this paragraph (f) if it shall have materially breached
this Agreement or if such breach by Parent is cured during such thirty day
period); or


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<PAGE>   45
               (g) by Parent, upon a breach of any representation, warranty,
covenant or agreement on the part of Company set forth in this Agreement, or if
any representation or warranty of Company shall have become untrue, in either
case such that the conditions set forth in Section 6.3(a) or Section 6.3(b)
would not be satisfied as of the time of such breach or as of the time such
representation or warranty shall have become untrue, provided, that if such
inaccuracy in Company's representations and warranties or breach by Company is
curable by Company through the exercise of its commercially reasonable efforts,
then Parent may not terminate this Agreement under this Section 7.1(g) for
thirty days after delivery of written notice from Parent to Company of such
breach, provided Company continues to exercise commercially reasonable efforts
to cure such breach (it being understood that Parent may not terminate this
Agreement pursuant to this paragraph (g) if it shall have materially breached
this Agreement or if such breach by Company is cured during such thirty day
period).

        7.2 Notice of Termination; Effect of Termination. Any termination of
this Agreement under Section 7.1 above will be effective immediately upon the
delivery of written notice of the terminating party to the other parties hereto.
In the event of the termination of this Agreement as provided in Section 7.1,
this Agreement shall be of no further force or effect, except (i) as set forth
in this Section 7.2, Section 7.3 and Article 8 (miscellaneous), each of which
shall survive the termination of this Agreement, and (ii) nothing herein shall
relieve any party from liability for any willful breach of this Agreement. No
termination of this Agreement shall affect the obligations of the parties
contained in the Confidentiality Agreement, all of which obligations shall
survive termination of this Agreement in accordance with their terms.

        7.3    Fees and Expenses.

               (a) General. Except as set forth in this Section 7.3, all fees
and expenses incurred in connection with this Agreement and the transactions
contemplated hereby shall be paid by the party incurring such expenses whether
or not the Merger is consummated; provided, however, that Parent and Company
shall share equally all fees and expenses, other than attorneys' and accountants
fees and expenses, incurred in relation to the printing and filing (with the
SEC) of the Proxy Statement/Prospectus (including any preliminary materials
related thereto) and the Registration Statement (including financial statements
and exhibits) and any amendments or supplements thereto.

               (b) Company Payments. In the event that this Agreement is
terminated by Parent pursuant to Section 7.1(d) or (e), Company shall promptly,
but in no event later than two days after the date of such termination, pay
Parent a fee equal to $9,000,000 in immediately available funds (the
"TERMINATION FEE"); provided, however, that such payment shall not be due if (i)
in the case of termination under Section 7.1(d), the failure to obtain the
required stockholder approval is primarily the result of a Material Adverse
Effect on Parent or (ii) in the case of termination under Section 7.1(e) if any
of the specified actions are taken primarily as a result of a Material Adverse
Effect on Parent. Company acknowledges that the agreements contained in this
Section 7.3(b) are an integral part of the transactions contemplated by this
Agreement, and that, without these agreements, Parent would not enter into this
Agreement; accordingly, if Company fails promptly to pay the amounts due
pursuant to this Section 7.3(b) , and, in order to obtain such payment, Parent
commences a suit which results in a judgment against Company for the amounts set
forth in this Section 7.3(b), Company shall pay to Parent its reasonable costs
and expenses (including attorneys' fees and expenses) in connection with such
suit, together with interest on the amounts set forth in this Section 7.3(b) at
the prime rate of The Chase Manhattan Bank in effect on the date such payment
was required to be made.

               (c) Payment of the fees described in Section 7.3(b) above shall
not be in lieu of damages incurred in the event of breach of this Agreement.

        7.4 Amendment. Subject to applicable law, this Agreement may be amended
by the parties hereto at any time by execution of an instrument in writing
signed on behalf of each of Parent and Company.

        7.5 Extension; Waiver. At any time prior to the Effective Time any party
hereto may, to the extent legally allowed, (i) extend the time for the
performance of any of the obligations or other acts of the other parties hereto,
(ii) waive any inaccuracies in the representations and warranties made to such
party contained herein or in any document delivered pursuant hereto and (iii)
waive compliance with any of the agreements or conditions for the benefit of
such party contained herein. Any agreement on the part of a party hereto to any
such extension or waiver shall be valid only if set forth in an


                                      -30-

<PAGE>   46
instrument in writing signed on behalf of such party. Delay in exercising any
right under this Agreement shall not constitute a waiver of such right.


                                  ARTICLE VIII
                               GENERAL PROVISIONS

        8.1 Non-Survival of Representations and Warranties. The representations
and warranties of Company, Parent and Merger Sub contained in this Agreement
shall terminate at the Effective Time, and only the covenants that by their
terms survive the Effective Time shall survive the Effective Time.

        8.2 Notices. All notices and other communications hereunder shall be in
writing and shall be deemed given if delivered personally or by commercial
delivery service, or sent via telecopy (receipt confirmed) to the parties at the
following addresses or telecopy numbers (or at such other address or telecopy
numbers for a party as shall be specified by like notice):

               (a)    if to Parent or Merger Sub, to:

                      Trusted Information Systems, Inc.
                      3060 Washington Road
                      Glenwood, Maryland  21738
                      Attention:  Stephen T. Walker
                      Telephone No.: (301) 854-6889
                      Telecopy No.:   (301) 854-5755
                      with a copy to:

                      Wilson Sonsini Goodrich & Rosati, P.C.
                      650 Page Mill Road
                      Palo Alto, California 94304-1050
                      Attention:  Jeffrey D. Saper, Esq.
                                  Kurt J. Berney, Esq.
                      Telephone No.:  (650) 493-9300
                      Telecopy No.:   (650) 493-6811

                      if to Company, to:

               (b)    Networks Associates, Inc.
                      2805 Bowers Avenue
                      Santa Clara, California  95051
                      Attention:  Probhat K. Goyal
                      Telephone No.: (408) 988-3932
                      Telecopy No.:  (408) 988-6054

                      with a copy to:

                      Piper & Marbury, L.L.P.
                      1200 Nineteenth Street, N.W.
                      Washington, D.C. 20036
                      Attention: Edwin M. Martin, Jr., Esq.
                      Telephone No.: (202) 861-6315
                      Telecopy No.:  (202)  223-2085



                                      -31-

<PAGE>   47
        8.3    Interpretation; Knowledge.

               (a) When a reference is made in this Agreement to Exhibits, such
reference shall be to an Exhibit to this Agreement unless otherwise indicated.
When a reference is made in this Agreement to Sections, such reference shall be
to a Section of this Agreement unless otherwise indicated the words "INCLUDE,"
"INCLUDES" and "INCLUDING" when used herein shall be deemed in each case to be
followed by the words "without limitation." 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. When reference is
made herein to "THE BUSINESS OF" an entity, such reference shall be deemed to
include the business of all direct and indirect subsidiaries of such entity.
Reference to the subsidiaries of an entity shall be deemed to include all direct
and indirect subsidiaries of such entity.

               (b) For purposes of this Agreement the term "KNOWLEDGE" means
with respect to a party hereto, with respect to any matter in question, that any
of the Chief Executive Officer, Chief Financial Officer or Controller of such
party, has actual knowledge of such matter.

               (c) For purposes of this Agreement, the term "MATERIAL ADVERSE
EFFECT" when used in connection with an entity means any change, event or effect
that is materially adverse to the business, assets (including intangible
assets), financial condition or results of operations of such entity and its
subsidiaries taken as a whole, except for those changes, events and effects that
(i) are directly caused by conditions affecting the United States economy as a
whole or affecting the industry in which such entity competes as a whole, which
conditions do not affect such entity in a disproportionate manner, or (ii) are
related to or result from announcement or pendency of the Merger.

        8.4 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 party, it being understood that all
parties need not sign the same counterpart.

        8.5 Entire Agreement; Third Party Beneficiaries. This Agreement and the
documents and instruments and other agreements among the parties hereto as
contemplated by or referred to herein, including the Company Schedules and the
Parent Schedules (a) constitute the entire agreement among the parties with
respect to the subject matter hereof and supersede all prior agreements and
understandings, both written and oral, among the parties with respect to the
subject matter hereof, it being understood that the Confidentiality Agreement
shall continue in full force and effect until the Closing and shall survive any
termination of this Agreement; and (b) are not intended to confer upon any other
person any rights or remedies hereunder, except as specifically provided in
Section 5.10.

        8.6 Severability. In the event that any provision of this Agreement or
the application thereof, becomes or is declared by a court of competent
jurisdiction to be illegal, void or unenforceable, the remainder of this
Agreement will continue in full force and effect and the application of such
provision to other persons or circumstances will be interpreted so as reasonably
to effect the intent of the parties hereto. The parties further agree to replace
such void or unenforceable provision of this Agreement with a valid and
enforceable provision that will achieve, to the extent possible, the economic,
business and other purposes of such void or unenforceable provision.

        8.7 Other Remedies; Specific Performance. Except as otherwise provided
herein, any and all remedies herein expressly conferred upon a party will be
deemed cumulative with and not exclusive of any other remedy conferred hereby,
or by law or equity upon such party, and the exercise by a party of any one
remedy will not preclude the exercise of any other remedy. The parties hereto
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 seek an injunction or injunctions to prevent
breaches of this Agreement and to enforce specifically the terms and provisions
hereof in any court of the United States or any state having jurisdiction, this
being in addition to any other remedy to which they are entitled at law or in
equity.

        8.8 Governing Law. This Agreement shall be governed by and construed in
accordance with the laws of the State of Delaware, regardless of the laws that
might otherwise govern under applicable principles of conflicts of law thereof;
provided that issues involving the corporate governance of any of the parties
hereto shall be governed by their respective


                                      -32-

<PAGE>   48
jurisdictions of incorporation. Each of the parties hereto irrevocably consents
to the exclusive jurisdiction of any state or federal court within the Northern
District of California, in connection with any matter based upon or arising out
of this Agreement or the matters contemplated herein, other than issues
involving the corporate governance of any of the parties hereto, agrees that
process may be served upon them in any manner authorized by the laws of the
State of California for such persons and waives and covenants not to assert or
plead any objection which they might otherwise have to such jurisdiction and
such process.

        8.9 Rules of Construction. The parties hereto agree that they have been
represented by counsel during the negotiation and execution of this Agreement
and, therefore, waive the application of any law, regulation, holding or rule of
construction providing that ambiguities in an agreement or other document will
be construed against the party drafting such agreement or document.

        8.10 Assignment. No party may assign either this Agreement or any of its
rights, interests, or obligations hereunder without the prior written approval
of the other parties. Subject to the preceding sentence, this Agreement shall be
binding upon and shall inure to the benefit of the parties hereto and their
respective successors and permitted assigns.

        8.11 WAIVER OF JURY TRIAL. EACH OF PARENT, COMPANY AND MERGER SUB HEREBY
IRREVOCABLY WAIVES ALL RIGHT TO TRIAL BY JURY IN ANY ACTION, PROCEEDING OR
COUNTERCLAIM (WHETHER BASED ON CONTRACT, TORT OR OTHERWISE) ARISING OUT OF OR
RELATING TO THIS AGREEMENT OR THE ACTIONS OF PARENT, COMPANY OR MERGER SUB IN
THE NEGOTIATION, ADMINISTRATION, PERFORMANCE AND ENFORCEMENT HEREOF.


                                      -33-

<PAGE>   49
        IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed by their duly authorized respective officers as of the date first
written above.


                            NETWORKS ASSOCIATES, INC.


                            By: /s/ William L. Larson
                               ---------------------------------------

                            Name: William L. Larson
                                --------------------------------------

                            Title: Chairman and CEO
                                 -------------------------------------- 

                             THOR ACQUISITION CORP.

                             By: /s/ Prabhat K. Goyal
                                ---------------------------------------

                             Name: Prabhat K. Goyal
                                 --------------------------------------

                             Title: President and Secretary
                                  ------------------------------------- 


                            TRUSTED INFORMATION SYSTEMS, INC.

                             By: /s/ Stephen T. Walker
                                ---------------------------------------

                             Name: Stephen T. Walker
                                 --------------------------------------

                             Title: Chairman and CEO
                                  -------------------------------------





                       **** REORGANIZATION AGREEMENT ****



                                      -34-

<PAGE>   50
                                                                       EXHIBIT 2


                                VOTING AGREEMENT

        This Voting Agreement ("AGREEMENT") is entered into as of February 22,
1998, between Networks Associates, Inc., a Delaware corporation ("PARENT"), and
the undersigned stockholder ("STOCKHOLDER") of Trusted Information Systems,
Inc., a Delaware corporation (the "COMPANY").

        RECITALS

        A. Concurrently with the execution of this Agreement, Parent, the
Company and Thor Acquisition Corp., a Delaware corporation and a wholly-owned
subsidiary of Parent ("MERGER Sub"), are entering into an Agreement and Plan of
Reorganization (the "MERGER AGREEMENT") which provides for the merger (the
"MERGER") of Merger Sub with and into the Company. Pursuant to the Merger,
shares of capital stock of the Company will be converted into Common Stock of
Parent on the basis described in the Merger Agreement.

        B. Stockholder is the record holder of the number of outstanding shares
of Common Stock of the Company indicated on the final page of this Agreement. In
addition, Stockholder holds options to purchase the number of shares of Common
Stock of the Company indicated on the final page of this Agreement.

        C. As a material inducement to enter into the Merger Agreement, Parent
desires Stockholder to agree, and Stockholder is willing to agree, to vote the
Shares (as defined below) and other such shares of capital stock of the Company
over which Stockholder has voting power so as to facilitate consummation of the
Merger.

        NOW, THEREFORE, intending to be legally bound, the parties agree as
follows:

        1.     Agreement to Vote Shares; Additional Purchases.

               1.1 Agreement to Vote Shares. At every meeting of the
stockholders of the Company called with respect to any of the following, and at
every adjournment thereof, and on every action or approval by written consent of
the stockholders of the Company with respect to any of the following,
Stockholder shall cause the Shares and any New Shares (as defined below) to be
voted:

                  (i) in favor of approval of the Merger, the execution and
delivery by the Company of the Merger Agreement and the adoption and approval of
the terms thereof and in favor of each of the other actions contemplated by the
Merger Agreement and any action required in furtherance thereof;

                  (ii) against approval of any proposal made in opposition
to or in competition with consummation of the Merger and the Merger Agreement;
and

                  (iii) against any of the following actions (other than
those actions that



<PAGE>   51

relate to the Merger and the transactions permitted or contemplated by the
Merger Agreement): (A) any merger, consolidation, business combination, sale of
assets, reorganization or recapitalization of the Company with any party, (B)
any sale, lease or transfer of any significant part of the assets of the
Company, (C) any reorganization, recapitalization, dissolution, liquidation or
winding up of the Company, (D) any material change in the capitalization of the
Company or the Company's corporate structure, or (E) any other action that is
intended, or could reasonably be expected to, impede, interfere with, delay,
postpone, discourage or adversely affect the Merger or any of the other
transactions contemplated by the Merger Agreement.

        Prior to the Expiration Date, as defined below, Stockholder shall not
enter into any agreement or understanding with any person to vote or give
instructions in any manner inconsistent with this Section.

               1.2 Transfer and Encumbrance. Stockholder agrees, during the
period beginning on the date hereof and ending on the Expiration Date, not to
transfer, sell, exchange, pledge or otherwise dispose of or encumber
(collectively, "TRANSFER") any of the Shares or any New Shares (as defined
below) or to discuss, negotiate, or make any offer or agreement relating thereto
other than to or with Parent. Stockholder acknowledges that the intent of the
foregoing sentence is to ensure that Parent retains the right under the Proxy
(as defined in Section 2 below) to vote the Shares and any New Shares in
accordance with the terms of the Proxy. As used herein, the term "EXPIRATION
DATE" shall mean the earlier to occur of (i) such date and time as the Merger
shall become effective in accordance with the terms and provisions of the Merger
Agreement or (ii) ninety (90) days after the termination of the Merger Agreement
in accordance with its terms.

               1.3 Definition. For purposes of this Agreement, "SHARES" shall
mean all issued and outstanding shares of Common Stock of the Company owned of
record or beneficially (over which beneficially-owned shares Stockholder
exercises voting power) by Stockholder as of the record date for persons
entitled (a) to receive notice of, and to vote at the meeting of the
stockholders of the Company called for the purpose of voting on the matter
referred to in Section 1.1, or (b) to take action by written consent of the
stockholders of the Company with respect to the matter referred to in Section
1.1.

               1.4 Additional Purchases. Stockholder agrees that any shares of
capital stock of the Company that Stockholder purchases or with respect to which
Stockholder otherwise acquires beneficial ownership (over which
beneficially-owned shares Stockholder exercises voting power) after the
execution of this Agreement and prior to the date of termination of this
Agreement ("NEW SHARES") shall be subject to the terms and conditions of this
Agreement to the same extent as if they constituted Shares.


        2. Irrevocable Proxy. Concurrently with the execution of this Agreement,
Stockholder agrees to deliver to Parent a proxy in the form attached hereto as
Exhibit A (the "PROXY"), which shall be irrevocable, with respect to the Shares.



                                      -2-
<PAGE>   52

        3. Representations, Warranties and Covenants of the Stockholder.
Stockholder (i) is the owner of the shares of Common Stock of the Company, and
the options to purchase shares of Common Stock of the Company, indicated on the
final page of this Agreement, which at the date hereof are free and clear of any
liens, claims, options, charges or other encumbrances; (ii) does not
beneficially own any securities of the Company other than the shares of Common
Stock and Preferred Stock of the Company, and options to purchase shares of
Common Stock of the Company, indicated on the final page of this Agreement; and
(iii) has full power and authority to make, enter into and carry out the terms
of this Agreement.

        4. Additional Documents. Stockholder and Parent hereby covenant and
agree to execute and deliver any additional documents necessary or desirable, in
the reasonable opinion of Parent or Stockholder, as the case may be, to carry
out the intent of this Agreement.

        5. Consent and Waiver. Stockholder (not in his capacity as a director or
officer of the Company) hereby gives any consents or waivers that are reasonably
required for the consummation of the Merger under the terms of any agreements to
which Stockholder is a party or pursuant to any rights Stockholder may have.

        6. Termination. This Agreement and the Proxy delivered in connection
herewith shall terminate and shall have no further force or effect upon the
Expiration Date.

        7. Legending of Shares. If so requested by Parent, Stockholder agrees
that the Shares and any New Shares shall bear a legend stating that they are
subject to this Agreement and to an irrevocable proxy. Stockholder agrees that
he shall not Transfer the Shares or any New Shares without first having the
aforementioned legend affixed to the certificates representing the Shares or any
New Shares.

        8.     Miscellaneous.

               8.1 Severability. If any term, provision, covenant or restriction
of this Agreement is held by a court of competent jurisdiction to be invalid,
void or unenforceable, then 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.

               8.2 Binding Effect and Assignment. This Agreement and all of the
provisions hereof shall be binding upon and inure to the benefit of the parties
hereto and their respective successors and permitted assigns, but, except as
otherwise specifically provided herein, neither this Agreement nor any of the
rights, interests or obligations of the parties hereto may be assigned by any of
the parties without the prior written consent of the other parties.

               8.3 Amendments and Modification. This Agreement may not be
modified, amended, altered or supplemented except by the execution and delivery
of a written agreement executed by the parties hereto.



                                      -3-
<PAGE>   53

               8.4 Waiver. No failure on the part of Parent to exercise any
power, right, privilege or remedy under this Agreement, and no delay on the part
of Parent in exercising any power, right, privilege or remedy under this
Agreement, shall operate as a waiver of such power, right, privilege or remedy;
and no single or partial exercise of any such power, right, privilege or remedy
shall preclude any other or further exercise thereof or of any other power,
right, privilege or remedy. Parent shall not be deemed to have waived any claim
arising out of this Agreement, or any power, right, privilege or remedy under
this Agreement, unless the waiver of such claim, power, right, privilege or
remedy is expressly set forth in a written instrument duly executed and
delivered on behalf of Parent; and any such waiver shall not be applicable or
have any effect except in the specific instance in which it is given.

               8.5 Specific Performance; Injunctive Relief. The parties
acknowledge that Parent will be irreparably harmed and that there will be no
adequate remedy at law for a violation of any of the covenants or agreements of
Stockholder set forth herein. Therefore, it is agreed that, in addition to any
other remedies that may be available to Parent upon any such violation, Parent
shall have the right to enforce such covenants and agreements by specific
performance, injunctive relief or by any other means available to Parent at law
or in equity.

               8.6 Notices. All notices, consents, waivers, and other
communications under this Agreement must be in writing and will be effective
upon the earlier of (a) receipt (b) delivery if delivered by hand (with written
confirmation of receipt), (c) one (1) business day after the date upon which
sent by telecopier if sent by telecopier (with written confirmation of receipt),
provided that a copy is mailed by registered mail, return receipt requested, or
(d) one (1) business day after depositing with a nationally recognized overnight
delivery service, if sent by a nationally recognized overnight delivery service
(freight paid and receipt requested), in each case to the appropriate addresses
and telecopier numbers set forth below (or to such other addresses and
telecopier numbers as a party may designate by notice to the other parties):

        If to Parent:        Networks Associates, Inc.
                             2805 Bowers Avenue
                             Santa Clara, CA  95051
                             Attention:  President and
                             Chief Executive Officer
                             Telephone No.:  (408) 988-3932
                             Facsimile No.:   (408) 988-6054



                                       -4-
<PAGE>   54

        With a copy to:      Wilson Sonsini Goodrich & Rosati, Professional
                             Corporation
                             650 Page Mill Road
                             Palo Alto, CA  94304-1050
                             Attention:  Jeff Saper, Esq.
                             Kurt Berney, Esq.
                             Telephone No.: (650) 493-9300
                             Facsimile No.: (650) 493-6811

        If to Stockholder:   To the address for notice set forth on the
                             signature page hereof

        With a copy to:
                             --------------------------------------------------
                             --------------------------------------------------
                             --------------------------------------------------
                             Telephone No.:
                                           ------------------------------------
                             Facsimile No.:
                                           ------------------------------------

        8.7 Governing Law. This Agreement shall be governed by, construed and
enforced in accordance with the laws of the State of Delaware, without giving
effect to any choice or conflict of law provision or rule (whether of the State
of Delaware or any other jurisdiction) that would cause the application of the
laws of any jurisdiction other than the State of Delaware.

        8.8 Entire Agreement. This Agreement, the Proxy, the Merger Agreement
and the Related Documents contain the entire understanding of the parties in
respect of the subject matter hereof, and supersede all prior negotiations and
understandings between the parties with respect to such subject matter.

        8.9 Counterparts. This Agreement may be executed in several
counterparts, each of which shall be an original, but all of which together
shall constitute one and the same agreement.

        8.10 Effect of Headings. The section headings herein are for convenience
only and shall not affect the construction or interpretation of this Agreement.

        8.11 Definitions. Capitalized terms used herein and not otherwise
defined shall have the respective meanings set forth in the Merger Agreement.



                                      -5-
<PAGE>   55

        IN WITNESS WHEREOF, the parties have caused this Voting Agreement to be
duly executed on the date and year first above written.

                                    NETWORKS ASSOCIATES, INC.

                                    By: /s/ William L. Larson
                                       -----------------------------------------

                                    Name: William L. Larson
                                         ---------------------------------------

                                    Title: Chairman and CEO
                                          --------------------------------------


                                    STOCKHOLDER:

                                    By:
                                       -----------------------------------------

                                    Name:
                                         ---------------------------------------

                                    Title:
                                          --------------------------------------

                                    Stockholder's Address for Notice:

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

                                                    Outstanding Shares of Common
                                    ----------------
                                    Stock of the Company

                                                    Outstanding Shares of Common
                                    ----------------
                                    Stock of the Company subject to outstanding
                                    stock options



                                      -6-
<PAGE>   56

                                    EXHIBIT A

                                IRREVOCABLE PROXY

The undersigned Stockholder of Thor, Inc., a Delaware corporation (the
"COMPANY"), hereby irrevocably appoints Prabhat K. Goyal, William Larson and the
directors on the Board of Directors of Networks Associates, Inc., a Delaware
corporation ("PARENT"), and each of them, as the sole and exclusive attorneys
and proxies of the undersigned, with full power of substitution and
resubstitution, to the full extent of the undersigned's rights with respect to
the voting of the Shares (as defined in the Voting Agreement of even date
between Parent and the Stockholder (the "VOTING AGREEMENT")) on the matter
described below (and on no other matter), until the Expiration Date as such term
is defined in the Voting Agreement. Upon the execution hereof, all prior proxies
given by the undersigned with respect to the Shares and any and all other shares
or securities issued or issuable in respect thereof on or after the date hereof
are hereby revoked and no subsequent proxies will be given.

This proxy is irrevocable, is granted pursuant to the Voting Agreement and is
granted in consideration of Parent entering into the Merger Agreement. The
attorneys and proxies named above will be empowered at any time prior to the
Expiration Date to exercise all voting rights (including, without limitation,
the power to execute and deliver written consents with respect to the Shares) of
the undersigned at every annual, special or adjourned meeting of the Company's
stockholders, and in every written consent in lieu of such a meeting, or
otherwise, to vote the Shares (i) in favor of approval of the Merger and the
Merger Agreement; (ii) against approval of any proposal made in opposition to or
in competition with consummation of the Merger and the Merger Agreement; and
(iii) against any action as set forth in Section 1.1(iii) of the Voting
Agreement.

The attorneys and proxies named above may only exercise this proxy to vote the
Shares subject hereto at any time prior to the Expiration Date, at every annual,
special or adjourned meeting of the Stockholders of the Company and in every
written consent in lieu of such meeting, (i) in favor of approval of the Merger
and the Merger Agreement; (ii) against approval of any proposal made in
opposition to or in competition with consummation of the Merger and the Merger
Agreement; and (iii) against any action as set forth in Section 1.1 (iii) of the
Voting Agreement. The undersigned Stockholder may vote the Shares on all other
matters.

Any obligation of the undersigned hereunder shall be binding upon the successors
and assigns of the undersigned.

This proxy is irrevocable.     Signature of Stockholder:
                                                        ------------------------

Dated:  February __, 1998      Print Name of Stockholder:
                                                        ------------------------

                               ***COMPANY PROXY***


<PAGE>   57
                                                                       EXHIBIT 3


                             STOCK OPTION AGREEMENT

        THIS STOCK OPTION AGREEMENT dated as of February 22, 1998 (the
"AGREEMENT") is entered into by and between Trusted Information Systems, Inc., a
Delaware corporation ("TARGET"), and Networks Associates, Inc., a Delaware
corporation ("ACQUIROR"). Capitalized terms used in this Agreement but not
defined herein shall have the meanings ascribed thereto in the Merger Agreement
(as defined below).

RECITALS

        WHEREAS, concurrently with the execution and delivery of this Agreement,
Target, Acquiror and Thor Acquisition Corp., a Delaware corporation and a wholly
owned subsidiary of Acquiror ("SUB"), are entering into an Agreement and Plan of
Reorganization (the "MERGER AGREEMENT"), which provides that, among other
things, upon the terms and subject to the conditions thereof, Target, Acquiror
and Sub will enter into a business combination transaction (the "MERGER"); and

        WHEREAS, as a condition to Acquiror's willingness to enter into the
Merger Agreement, Acquiror has requested that Target agree, and Target has so
agreed, to grant to Acquiror an option to acquire shares of Target's Common
Stock, $0.01 par value, upon the terms and subject to the conditions set forth
herein;

AGREEMENT

        NOW, THEREFORE, in consideration of the foregoing and of the mutual
covenants and agreements set forth herein and in the Merger Agreement and for
other good and valuable consideration, the receipt and adequacy of which are
hereby acknowledged, the parties hereto agree as follows:

        1.     GRANT OF OPTION

               Target hereby grants to Acquiror an irrevocable option (the
"OPTION") to acquire up to a number of shares of the Common Stock, $0.01 par
value, of Target ("TARGET SHARES") equal to 19.9% of the issued and outstanding
shares as of the first date, if any, upon which an Exercise Event (as defined in
Section 2(a) below) shall occur (the "OPTION SHARES"), in the manner set forth
below (i) by paying cash at a price of $20.00 per share (the "EXERCISE PRICE")
and/or, at Acquiror's election, (ii) by exchanging therefor shares of the Common
Stock, $0.01 par value, of Acquiror ("ACQUIROR SHARES") at a rate (the "EXERCISE
RATIO"), for each Option Share, of a number of Acquiror Shares equal to the
Exercise Price divided by the average closing sale prices during the previous 30
trading days of Acquiror Shares on the Nasdaq National Market immediately
preceding the date of the Closing (as defined below) of the particular Option
exercise (the "ACQUIROR SHARE PRICE").

        2.     Exercise of Option; Maximum Proceeds



<PAGE>   58

               (a) For all purposes of this Agreement, an "EXERCISE EVENT" shall
occur immediately prior to the consummation of a Target Acquisition. A "TARGET
ACQUISITION" shall mean any of the following transactions or series of related
transactions: (i) a merger, consolidation, business combination,
recapitalization, liquidation, dissolution or similar transaction involving
Target pursuant to which the stockholders of Target immediately preceding such
transaction or series of related transactions hold less than 60% of the equity
interests in the surviving or resulting entity of such transaction or
transactions (without respect to any overlap in the companies' stockholder
bases) (other than the transactions contemplated by this Agreement); (ii) a sale
or other disposition by Target of assets (excluding inventory and used equipment
sold in the ordinary course of business) representing in excess of 40% of the
fair market value of Target's business immediately prior to such sale; or (iii)
the acquisition by any person or group (including by way of a tender offer or an
exchange offer or issuance by Target), directly or indirectly, of beneficial
ownership or a right to acquire beneficial ownership of 40% or more of the then
outstanding shares of capital stock of Target. Consummation by Acquiror of the
Merger or any other Acquisition with Target will not constitute a Target
Acquisition. Notwithstanding any provision of this Agreement to the contrary,
the economic benefit derived by Acquiror under this Agreement shall not exceed
$12,000,000, less any Termination Fee paid to Acquiror under Section 7.3(b) of
the Merger Agreement, and Acquiror shall promptly account to Target for any such
excess. In addition, in lieu of delivery and receipt of the Target Shares
issuable in connection with an Exercise Event, either Acquiror or Target may
elect to have the economic benefit, if any, payable to Acquiror, pursuant to the
immediately preceding sentence, be paid in cash promptly to Acquiror.

               (b) Acquiror may deliver to Target a written notice (and
"EXERCISE NOTICE") specifying that it wishes to exercise and close a purchase of
Option Shares at any time within 30 days following the occurrence of an Exercise
Event, specifying the total number of Option Shares it wishes to acquire. Each
closing of a purchase of Option Shares (a "CLOSING") shall occur on the date and
at a time designated by the Acquiror in an Exercise Notice delivered at least
five (5) business days prior to the date of such Closing, which Closing shall be
held at the offices of counsel to Acquiror upon the occurrence of an Exercise
Event prior to the termination of the Option as may be designated by Acquiror in
writing. In the event that no Exercise Event shall occur prior to termination of
the Option, such Exercise Notice shall be void and of no further force and
effect.

               (c) The Option shall terminate upon the earlier of (i) the
Effective Time; (ii) 12 months following the termination of the Merger Agreement
pursuant to Section 7.1(b), (d), (e) or (g) thereof if a third person or group
shall have made and not withdrawn a proposal or entered into an agreement with
Target with respect to a Target Acquisition on or prior to the date of such
termination; and (iii) six months after the date on which the Merger Agreement
is terminated pursuant to Section 7.1(d), (e) or (g) if at the time of such
termination there shall be no outstanding third person or group offer or
agreement with Target with respect to any Target Acquisition (provided that, if
during the pendency of such six-month period any such proposal is made or
agreement is entered into, the Option shall not terminate until six months after
the date such offer or agreement is made or entered into); provided, however,
that if the Option is exercisable but cannot be exercised by reason of any
applicable government order or because the waiting period related to the
issuance of the Option Shares under the HSR Act shall not have expired or been
terminated, then the Option shall not terminate until the tenth business day
after such impediment to exercise shall have been removed or shall have become
final and



<PAGE>   59

not subject to appeal. Notwithstanding the foregoing, the Option may not be
exercised if (i) Acquiror shall have breached in any material respect any of its
covenants or agreements contained in the Merger Agreement or (ii) the
representations and warranties of Acquiror contained in the Merger Agreement
shall not have been true and correct in all material respects on and as of the
date when made.

        3.     CONDITIONS TO CLOSING

               The obligation of Target to issue Option Shares to Acquiror
hereunder is subject to the conditions that (a) any waiting period under the HSR
Act applicable to the issuance of the Option Shares hereunder shall have expired
or been terminated; (b) all material consents, approvals, orders or
authorizations of, or registrations, declarations or filings with, any Federal,
state or local administrative agency or commission or other Federal state or
local governmental authority or instrumentality, if any, required in connection
with the issuance of the Option Shares hereunder shall have been obtained or
made, as the case may be; and (c) no preliminary or permanent injunction or
other order by any court of competent jurisdiction prohibiting or otherwise
restraining such issuance shall be in effect. It is understood and agreed that
at any time during which Acquiror shall be entitled to deliver to Target an
Exercise Notice, the parties will use their respective best efforts to satisfy
all conditions to Closing, so that a Closing may take place as promptly as
practicable, and in any event, upon the occurrence of an Exercise Event.

        4.     CLOSING

               At any Closing, (a) Target shall deliver to Acquiror a single
certificate in definitive form representing the number of Target Shares
designated by Acquiror in its Exercise Notice, such certificate to be registered
in the name of Acquiror and to bear the legend set forth in Section 10 hereof,
against delivery of (b) payment by Acquiror to Target of the aggregate purchase
price for the Target Shares so designated and being purchased by delivery of (i)
a certified check or bank check and/or, at Acquiror's election, (ii) a single
certificate in definitive form representing the number of Acquiror Shares being
issued by Acquiror in consideration therefor (based on the Exercise Ratio), such
certificate to be registered in the name of Target and to bear the legend set
forth in Section 10 hereof.



<PAGE>   60

        5.     REPRESENTATIONS AND WARRANTIES OF TARGET

               Target represents and warrants to Acquiror that (a) Target is a
corporation duly organized, validly existing and in good standing under the laws
of the State of Delaware and has the corporate power and authority to enter into
this Agreement and to carry out its obligations hereunder; (b) the execution and
delivery of this Agreement by Target and consummation by Target of the
transactions contemplated hereby have been duly authorized by all necessary
corporate action on the part of Target and no other corporate proceedings on the
part of Target are necessary to authorize this Agreement or any of the
transactions contemplated hereby; (c) this Agreement has been duly executed and
delivered by Target and constitutes a legal, valid and binding obligation of
Target and, assuming this Agreement constitutes a legal, valid and binding
obligation of Acquiror, is enforceable against Target in accordance with its
terms, except as enforceability may be limited by bankruptcy and other laws
affecting the rights and remedies of creditors generally and general principles
of equity; (d) except for any filings required under the HSR Act, Target has
taken all necessary corporate and other action to authorize and reserve for
issuance and to permit it to issue upon exercise of the Option, and at all times
from the date hereof until the termination of the Option will have reserved for
issuance, a sufficient number of unissued Target Shares for Acquiror to exercise
the Option in full and will take all necessary corporate or other action to
authorize and reserve for issuance all additional Target Shares or other
securities which may be issuable pursuant to Section 9(a) upon exercise of the
Option, all of which, upon their issuance and delivery in accordance with the
terms of this Agreement, will be validly issued, fully paid and nonassessable;
(e) upon delivery of the Target Shares and any other securities to Acquiror upon
exercise of the Option, Acquiror will acquire such Target Shares or other
securities free and clear of all material claims, liens, charges, encumbrances
and security interests of any kind or nature whatsoever, excluding those imposed
by Acquiror; (f) the execution and delivery of this Agreement by Target do not,
and the performance of this Agreement by Target will not, (i) violate the
Certificate of Incorporation or Bylaws of Target, (ii) conflict with or violate
any order applicable to Target or any of its subsidiaries or by which they or
any of their property is bound or affected or (iii) result in any breach of or
constitute a default (or an event which with notice or lapse of time or both
would become a default) under, or give rise to any right of termination,
amendment, acceleration or cancellation of, or result in the creation of a lien
or encumbrance on any property or assets of Target or any of its subsidiaries
pursuant to, any contract or agreement to which Target or any of its
subsidiaries is a party or by which Target or any of its subsidiaries or any of
their property is bound or affected, except, in the case of clauses (ii) and
(iii) above, for violations, conflicts, breaches, defaults, rights of
termination, amendment, acceleration or cancellation, liens or encumbrances
which would not, individually or in the aggregate, have a Material Adverse
Effect on Target; and (g) the execution and delivery of this Agreement by Target
does not, and the performance of this Agreement by Target will not, require any
consent, approval, authorization or permit of, or filing with, or notification
to, any Governmental Entity except pursuant to the HSR Act.



<PAGE>   61

        6.     REPRESENTATIONS AND WARRANTIES OF ACQUIROR

               Acquiror represents and warrants to Target that (a) Acquiror is a
corporation duly incorporated, validly existing and in good standing under the
laws of the State of Delaware and has the corporate power and authority to enter
into this Agreement and to carry out its obligations hereunder; (b) the
execution and delivery of this Agreement by Acquiror and the consummation by
Acquiror of the transactions contemplated hereby have been duly authorized by
all necessary corporate action on the part of Acquiror and no other corporate
proceedings on the part of Acquiror are necessary to authorize this Agreement or
any of the transactions contemplated hereby; (c) this Agreement has been duly
executed and delivered by Acquiror and constitutes a legal, valid and binding
obligation of Acquiror and, assuming this Agreement constitutes a legal, valid
and binding obligation of Target, is enforceable against Acquiror in accordance
with its terms, except as enforceability may be limited by bankruptcy and other
laws affecting the rights and remedies of creditors generally and general
principles of equity; and (d) except for any filings required under the HSR Act,
Acquiror has taken (or will in a timely manner take) all necessary corporate and
other action in connection with any exercise of the Option; (e) upon delivery of
Acquiror Shares to Target in consideration of any acquisition of Target Shares
pursuant hereto, Target will acquire such Acquiror Shares free and clear of all
material claims, liens, charges, encumbrances and security interests of any kind
or nature whatsoever, excluding those imposed by Target; (f) the execution and
delivery of this Agreement by Acquiror do not, and the performance of this
Agreement by Acquiror will not, (i) violate the Articles of Association of
Acquiror, (ii) conflict with or violate any order applicable to Acquiror or any
of its subsidiaries or by which they or any of their property is bound or
affected or (iii) result in any breach of or constitute a default (or an event
which with notice or lapse of time or both would become a default) under, or
give rise to any right of termination, amendment, acceleration or cancellation
of, or result in the creation of a lien or encumbrance on any of the property or
assets of Acquiror or any of its subsidiaries pursuant to, any contract or
agreement to which Acquiror or any of its subsidiaries is a party or by which
Acquiror or any of its subsidiaries or any of their property is bound or
affected, except, in the case of clauses (ii) and (iii) above, for violations,
conflicts, breaches, defaults, rights of termination, amendment, acceleration or
cancellation, liens or encumbrances which would not, individually or in the
aggregate, have a Material Adverse Effect on Acquiror; (g) the execution and
delivery of this Agreement by Acquiror does not, and the performance of this
Agreement by Acquiror will not, require any consent, approval, authorization or
permit of, or filing with or notification to, any Governmental Entity except
pursuant to the HSR Act; and (h) any Target Shares acquired upon exercise of the
Option will not be acquired by Acquiror with a view to the public distribution
thereof and Acquiror will not sell or otherwise dispose of such shares in
violation of applicable law or this Agreement.



<PAGE>   62

        7.     CERTAIN RIGHTS

               (a) ACQUIROR PUT. If Acquiror shall have exercised the Option,
Acquiror may thereafter deliver to Target a written notice (a "PUT NOTICE"), at
any time during which Acquiror may exercise the Option, specifying that it
wishes to sell (as specified in such Put Notice) all or a portion of the Option
Shares acquired as a result of such exercise at the price, and in the form, set
forth in paragraph (b) below. At any time after delivery of a Put Notice, unless
such Put Notice is withdrawn by Acquiror, the closing of the Put (the "PUT
Closing") shall take place at the principal offices of Target on the date
specified in the Put Notice (which shall be at least 5 days after the date of
such Put Notice).

               (b) PAYMENT AND REDELIVERY OF CASH OR ACQUIROR SHARES. At the Put
Closing, (i) Acquiror shall surrender to Target the certificates evidencing the
Option Shares to be purchased by Target at such Put Closing and (ii) Target
shall deliver to Acquiror a proportionate amount of the aggregate consideration
paid by Acquiror in connection with any exercise of the Option, together with
interest on such amounts at a per annum rate of 10% (which, in the case of
Acquiror Shares, shall be based upon each applicable Acquiror Share Price). In
addition, the consideration to be paid by Target to Acquiror at any Put Closing
shall be in the form that is proportionate to the form previously paid by
Acquiror to Target. By way of example only, if (x) one third of the aggregate
Option Shares shall have been acquired for cash and two-thirds shall have been
acquired for Acquiror Shares, then (y) the consideration to be paid by Target to
Acquiror at such Put Closing shall consist of one-third cash and two-thirds
Acquiror Shares. Any cash payment required to be made by Target to Acquiror
shall be paid a certified check or bank check. In connection with any Acquiror
Shares returned to Acquiror at a Put Closing, Target shall represent and warrant
that such shares are then free and clear of all claims, liens, charges,
encumbrances and security interests of any kind or nature whatsoever, other than
those imposed by Acquiror.

               (c) EFFECT OF CERTAIN ACTIONS. The amount of Option Shares and
Acquiror Shares delivered or required to be delivered hereunder shall reflect
appropriately the effect of any stock split, reverse stock split, stock dividend
(including any dividend or distribution of securities convertible into Acquiror
Common Shares or Target Common Stock), reorganization, recapitalization or other
like change with respect to Acquiror Common Shares or Target Common Stock
occurring after the date of Closing and prior to the date of the Put Closing.

               (d) RESTRICTIONS ON TRANSFER. Until the termination of the
Option, Target shall not sell, transfer or otherwise dispose of any Acquiror
Shares acquired by it pursuant to this Agreement.

        8.     REGISTRATION RIGHTS

               (a) Following the termination of the Merger Agreement, each party
hereto (a "HOLDER") may by written notice (a "REGISTRATION NOTICE") to the other
party (the "REGISTRANT") request the Registrant to register under the Securities
Act all or any part of the shares acquired by such Holder pursuant to this
Agreement (the "REGISTRABLE SECURITIES") in order to permit the sale or other
disposition of such shares pursuant to a bona fide firm commitment underwritten
public offering in which the Holder and the underwriters shall effect as wide a
distribution of such Registrable Securities as is



<PAGE>   63

reasonably practicable and shall use reasonable efforts to prevent any person or
group from purchasing through such offering shares representing more than 1% of
the outstanding shares of Common Stock of the Registrant on a fully diluted
basis (a "PERMITTED OFFERING"); provided, however, that any such Registration
Notice must relate to a number of shares equal to at least 2% of the outstanding
shares of Common Stock of the Registrant on a fully diluted basis and that any
rights to require registration hereunder shall terminate with respect to any
shares that may be sold pursuant to Rule 144(k) under the Securities Act. The
Registration Notice shall include a certificate executed by the Holder and its
proposed managing underwriter, which underwriter shall be an investment banking
firm of nationally recognized standing (the "MANAGER"), stating that (i) the
Holder and the Manager have a good faith intention to commence a Permitted
Offering and (ii) the Manager in good faith believes that, based on the then
prevailing market conditions, it will be able to sell the Registrable Securities
at a per share price equal to at least 80% of the per share average of the
closing sale prices of the Registrant's Common Stock on the Nasdaq National
Market for the twenty trading days immediately preceding the date of the
Registration Notice. The Registrant shall thereupon have the option exercisable
by written notice delivered to the Holder within ten business days after the
receipt of the Registration Notice, irrevocably to agree to purchase all or any
part of the Registrable Securities for cash at a price (the "OPTION PRICE" equal
to the product of (i) the number of Registrable Securities so purchased and (ii)
the per share average of the closing sale prices of the Registrant's Common
Stock on the Nasdaq National Market for the twenty trading days immediately
preceding the date of the Registration Notice. Any such purchase of Registrable
Securities by the Registrant hereunder shall take place at a closing to be held
at the principal executive offices of the Registrant or its counsel at any
reasonable date and time designated by the Registrant in such notice within 10
business days after delivery of such notice. The payment for the shares to be
purchased shall be made by delivery at the time of such closing of the Option
Price in immediately available funds.

               (b) If the Registrant does not elect to exercise its option to
purchase pursuant to Section 8(a) with respect to all Registrable Securities,
the Registrant shall use all reasonable efforts to effect, as promptly as
practicable, the registration under the Securities Act of the unpurchased
Registrable Securities requested to be registered in the Registration Notice;
provided, however, that (i) neither party shall be entitled to more than an
aggregate of two effective registration statements hereunder and (ii) the
Registrant will not be required to file any such registration statement during
any period of time (not to exceed 40 days after a Registration Notice in the
case of clause (A) below or 90 days after a Registration Notice in the case of
clauses (B) and (C) below) when (A) the Registrant is in possession of material
non-public information which it reasonably believes would be detrimental to be
disclosed at such time and, in the written opinion of counsel to such
Registrant, such information would have to be disclosed if a registration
statement were filed at that time; (B) such Registrant is required under the
Securities Act to include audited financial statements for any period in such
registration statement and such financial statements are not yet available for
inclusion in such registration statement; or (C) such Registrant determines, in
its reasonable judgment, that such registration would interfere with any
financing, acquisition or other material transaction involving the Registrant.
If consummation of the sale of any Registrable Securities pursuant to a
registration hereunder does not occur within 180 days after the filing with the
SEC of the initial registration statement therefor, the provisions of this
Section 8 shall again be applicable to any proposed registration, it being
understood that neither party shall be entitled to more than an aggregate of two
effective registration statements hereunder. The Registrant



<PAGE>   64

shall use all reasonable efforts to cause any Registrable Securities registered
pursuant to this Section 8 to be qualified for sale under the securities or blue
sky laws of such jurisdictions as the Holder may reasonably request and shall
continue such registration or qualification in effect in such jurisdictions;
provided, however, that the Registrant shall not be required to qualify to do
business in, or consent to general service of process in, any jurisdiction by
reason of this provision.

               (c) The registration rights set forth in this Section 8 are
subject to the condition that the Holder shall provide the Registrant with such
information with respect to such Holder's Registrable Securities, the plan for
distribution thereof, and such other information with respect to such Holder as,
in the reasonable judgment of counsel for the Registrant, is necessary to enable
the Registrant to include in a registration statement all material facts
required to be disclosed with respect to a registration thereunder.

               (d) A registration effected under this Section 8 shall be
effected at the Registrant's expense, except for underwriting discounts and
commissions and the fees and expenses of counsel to the Holder, and the
Registrant shall provide to the underwriters such documentation (including
certificates, opinions of counsel and "comfort" letters from auditors) as are
customary in connection with underwritten public offerings and as such
underwriters may reasonably require. In connection with any registration, the
Holder and the Registrant agree to enter into an underwriting agreement
reasonably acceptable to each such party, in form and substance customary for
transactions of this type with the underwriters participating in such offering.

               (e)    Indemnification

                      (i)    The Registrant will indemnify the Holder, each of
its directors and officers and each person who controls the Holder within the
meaning of Section 15 of the Securities Act, and each underwriter of the
Registrant's securities, with respect to any registration, qualification or
compliance which has been effected pursuant to this Agreement, against all
expenses, claims, losses, damages or liabilities (or actions in respect
thereof), including any of the foregoing incurred in settlement of any
litigation, commenced or threatened, arising out of or based on any untrue
statement (or alleged untrue statement) of a material fact contained in any
registration statement, prospectus, offering circular or other document, or any
amendment or supplement thereto, incident to any such registration,
qualification or compliance, or based on any omission (or alleged omission) to
state therein a material fact required to be stated therein or necessary to make
the statements therein, in light of the circumstances in which they were made,
not misleading, or any violation by the Registrant of any rule or regulation
promulgated under the Securities Act applicable to the Registrant in connection
with any such registration, qualification or compliance, and the Registrant will
reimburse the Holder and, each of its directors and officers and each person who
controls the Holder within the meaning of Section 15 of the Securities Act, and
each underwriter for any legal and any other expenses reasonably incurred in
connection with investigating, preparing or defending any such claim, loss,
damage, liability or action, provided that the Registrant will not be liable in
any such case to the extent that any such claim, loss, damage, liability or
expense arises out of or is based on any untrue statement or omission or alleged
untrue statement or omission, made in reliance upon and in conformity with
written information furnished to the Registrant by such Holder or director or
officer or controlling person or underwriter



<PAGE>   65

seeking indemnification.

                      (ii) The Holder will indemnify the Registrant, each of its
directors and officers and each underwriter of the Registrant's securities
covered by such registration statement and each person who controls the
Registrant within the meaning of Section 15 of the Securities Act, against all
claims, losses, damages and liabilities (or actions in respect thereof),
including any of the foregoing incurred in settlement of any litigation,
commenced or threatened, arising out of or based on any untrue statement (or
alleged untrue statement) of a material fact contained in any such registration
statement, prospectus, offering circular or other document, or any omission (or
alleged omission) to state therein a material fact required to be stated therein
or necessary to make the statements therein not misleading, or any violation by
the Holder of any rule or regulation promulgated under the Securities Act
applicable to the Holder in connection with any such registration, qualification
or compliance, and will reimburse the Registrant, such directors, officers or
control persons or underwriters for any legal or any other expenses reasonably
incurred in connection with investigating, preparing or defending any such
claim, loss, damage, liability or action, in each case to the extent, but only
to the extent, that such untrue statement (or alleged untrue statement) or
omission (or alleged omission) is made in such registration statement,
prospectus, offering circular or other document in reliance upon and in
conformity with written information furnished to the Registrant by the Holder
for use therein, provided that in no event shall any indemnity under this
Section 8(e) exceed the gross proceeds of the offering received by the Holder..

                      (iii) Each party entitled to indemnification under this
Section 8(e) (the "INDEMNIFIED PARTY") shall give notice to the party required
to provide indemnification (the "INDEMNIFYING PARTY") promptly after such
Indemnified Party has actual knowledge of any claim as to which indemnity may be
sought, and shall permit the Indemnifying Party to assume the defense of any
such claim or any litigation resulting therefrom, provided that counsel for the
Indemnifying Party, who shall conduct the defense of such claim or litigation,
shall be approved by the Indemnified Party (whose approval shall not
unreasonably be withheld), and the Indemnified Party may participate in such
defense at such party's expense; provided, however, that the Indemnifying Party
shall pay such expense if representation of the Indemnified Party by counsel
retained by the Indemnifying Party would be inappropriate due to actual or
potential differing interests between the Indemnified Party and any other party
represented by such counsel in such proceeding, and provided further that the
failure of any Indemnified Party to give notice as provided herein shall not
relieve the Indemnifying Party of its obligations under this Section 8(e) unless
the failure to give such notice is materially prejudicial to an Indemnifying
Party's ability to defend such action. No Indemnifying Party, in the defense of
any such claim or litigation shall, except with the consent of each Indemnified
Party, consent to entry of any judgment or enter into any settlement which does
not include as an unconditional term thereof the giving by the claimant or
plaintiff to such Indemnified Party of a release from all liability in respect
to such claim or litigation. No Indemnifying Party shall be required to
indemnify any Indemnified Party with respect to any settlement entered into
without such Indemnifying Party's prior consent (which shall not be unreasonably
withheld).

        9.     ADJUSTMENT UPON CHANGES IN CAPITALIZATION; RIGHTS PLANS



<PAGE>   66

               (a) In the event of any change in the Target Shares by reason of
stock dividends, stock splits, reverse stock splits, mergers (other than the
Merger), recapitalizations, combinations, exchanges of shares and the like, the
type and number of shares or securities subject to the Option, the Exercise
Ratio and the Exercise Price shall be adjusted appropriately, and proper
provision shall be made in the agreements governing such transaction so that
Acquiror shall receive, upon exercise of the Option, the number and class of
shares or other securities or property that Acquiror would have received in
respect of the Target Shares if the Option had been exercised immediately prior
to such event or the record date therefor, as applicable.

               (b) At any time during which the Option is exercisable, and at
any time after the Option is exercised (in whole or in part, if at all), Target
shall not adopt a stockholders rights plan (a so-called "poison pill") that
contains provisions for the distribution of rights thereunder as a result of
Acquiror being the beneficial owner of shares of the first party by virtue of
the Option being exercisable or having been exercised (or as a result of such
other party beneficially owning shares issuable in respect of any Option
Shares). It is understood, however, that following termination (if any) of the
Merger Agreement, a party may adopt a stockholders rights plan, that contains
provisions for the distribution of rights thereunder as a result of the other
party being the beneficial owner of shares of the first party in addition to
those that may be beneficially owned by virtue of the Option being exercisable
or having been exercised (or as a result of such other party beneficially owning
shares issuable in respect of any Option Shares).

        10.    RESTRICTIVE LEGENDS

               Each certificate representing Option Shares issued to Acquiror
hereunder, and each certificate representing Acquiror Shares delivered to Target
at a Closing, shall include a legend in substantially the following form:

THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED UNDER
THE SECURITIES ACT OF 1933, AS AMENDED, AND MAY BE REOFFERED OR SOLD ONLY IF SO
REGISTERED OR IF AN EXEMPTION FROM SUCH REGISTRATION IS AVAILABLE. SUCH
SECURITIES ARE ALSO SUBJECT TO ADDITIONAL RESTRICTIONS ON TRANSFER AS SET FORTH
IN THE STOCK OPTION AGREEMENT DATED AS OF FEBRUARY 22, A COPY OF WHICH MAY BE
OBTAINED FROM ACQUIROR.

        11.    LISTING AND HSR FILING

               Target, upon the request of Acquiror, shall promptly file an
application to list the Target Shares to be acquired upon exercise of the Option
for quotation on the Nasdaq National Market and shall use its best efforts to
obtain approval of such listing as soon as practicable. Promptly after the date
hereof, each of the parties hereto shall promptly file with the Federal Trade
Commission and the Antitrust Division of the United States Department of Justice
all required premerger notification and report forms and other documents and
exhibits required to be filed under the HSR Act to permit the acquisition of the
Target Shares subject to the Option at the earliest possible date.



<PAGE>   67

        12.    BINDING EFFECT

               This Agreement shall be binding upon and inure to the benefit of
the parties hereto and their respective successors and permitted assigns.
Nothing contained in this Agreement, express or implied, is intended to confer
upon any person other than the parties hereto and their respective successors
and permitted assigns any rights or remedies of any nature whatsoever by reason
of this Agreement. Any shares sold by a party in compliance with the provisions
of Section 8 shall, upon consummation of such sale, be free of the restrictions
imposed with respect to such shares by this Agreement and any transferee of such
shares shall not be entitled to the rights of such party. Certificates
representing shares sold in a registered public offering pursuant to Section 8
shall not be required to bear the legend set forth in Section 10.

        13.    SPECIFIC PERFORMANCE

               The parties recognize and agree that if for any reason any of the
provisions of this Agreement are not performed in accordance with their specific
terms or are otherwise breached, immediate and irreparable harm or injury would
be caused for which money damages would not be an adequate remedy. Accordingly,
each party agrees that in addition to other remedies the other party shall be
entitled to an injunction restraining any violation or threatened violation of
the provisions of this Agreement. In the event that any action shall be brought
in equity to enforce the provisions of the Agreement, neither party will allege,
and each party hereby waives the defense, that there is an adequate remedy at
law.



<PAGE>   68

        14.    ENTIRE AGREEMENT

               This Agreement and the Merger Agreement (including the appendices
thereto) constitute the entire agreement between the parties with respect to the
subject matter hereof and supersede all other prior agreements and
understandings, both written and oral, between the parties with respect to the
subject matter hereof.

        15.    FURTHER ASSURANCES

               Each party will execute and deliver all such further documents
and instruments and take all such further action as may be necessary in order to
consummate the transactions contemplated hereby.

        16.    VALIDITY

               The invalidity or unenforceability of any provision of this
Agreement shall not affect the validity or enforceability of the other
provisions of this Agreement, which shall remain in full force and effect. In
the event any Governmental Entity of competent jurisdiction holds any provision
of this Agreement to be null, void or unenforceable, the parties hereto shall
negotiate in good faith and shall execute and deliver an amendment to this
Agreement in order, as nearly as possible, to effectuate, to the extent
permitted by law, the intent of the parties hereto with respect to such
provision.

        17.    NOTICES

               All notices and other communications hereunder shall be in
writing and shall be deemed given if delivered personally or by commercial
delivery service, or sent via telecopy (receipt confirmed) to the parties at the
following addresses or telecopy numbers (or at such other address or telecopy
numbers for a party as shall be specified by like notice):

               (a)    if to Target, to:     Trusted Information Systems, Inc.
                                            3060 Washington Road
                                            Glenwood, MD  21738
                                            Telephone No.: (301) 854-6889
                                            Facsimile No.: (301) 854-5755
                                            Attention:  President and
                                            Chief Executive Officer



<PAGE>   69



                 with a copy to:       Piper & Marbury L.L.P.
                                       1200 Nineteenth Street, N.W.
                                       Washington, DC  20036
                                       Telephone No.: (202) 861-3900
                                       Facsimile No.: (202) 223-2085
                                       Attention:  Edwin M. Martin, Jr., Esq.

          (b)    if to Acquiror, to:   Networks Associates, Inc.
                                       2805 Bowers Avenue
                                       Santa Clara, CA  95051
                                       Attention:  President and
                                       Chief Executive Officer
                                       Telephone No.:  (408) 988-3932
                                       Facsimile No.:   (408) 988-6054

                 with a copy to:       Wilson Sonsini Goodrich & Rosati, P.C.
                                       650 Page Mill Road
                                              Palo Alto, California 94304-1050
                                       Attention:  Jeffrey D. Saper, Esq.
                                                         Kurt J. Berney, Esq.
                                       Telephone No.:  (650) 493-9300
                                       Telecopy No.:    (650) 493-6811

        18.    GOVERNING LAW

               This Agreement shall be governed by and construed in accordance
with the laws of the State of Delaware applicable to agreements made and to be
performed entirely within such State.

        19.    COUNTERPARTS

               This Agreement may be executed in two counterparts, each of which
shall be deemed to be an original, but both of which, taken together, shall
constitute one and the same instrument.

        20.    EXPENSES

               Except as otherwise expressly provided herein or in the Merger
Agreement, all costs and expenses incurred in connection with the transactions
contemplated by this Agreement shall be paid by the party incurring such
expenses.



<PAGE>   70

        21.    AMENDMENTS; WAIVER

               This Agreement may be amended by the parties hereto and the terms
and conditions hereof may be waived only by an instrument in writing signed on
behalf of each of the parties hereto, or, in the case of a waiver, by an
instrument signed on behalf of the party waiving compliance.

        22.    ASSIGNMENT

               Neither of the parties hereto may sell, transfer, assign or
otherwise dispose of any of its rights or obligations under this Agreement or
the Option created hereunder to any other person, without the express written
consent of the other party, except that the rights and obligations hereunder
shall inure to the benefit of and be binding upon any successor of a party
hereto.



<PAGE>   71

        IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed by their respective duly authorized officers as of the date first above
written.


ACQUIROR:

NETWORKS ASSOCIATES, INC.

By: /s/ William L. Larson
   -----------------------------------------

Name: William L. Larson
     ---------------------------------------
Title: Chief Executive Officer

TARGET:

TRUSTED INFORMATION SYSTEMS, INC.

By: /s/ Stephen T. Walker
   -----------------------------------------

Name: Stephen T. Walker
     ---------------------------------------
Title: President and Chief Executive Officer


                          ***STOCK OPTION AGREEMENT***
                           (Target option to Acquiror)




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