ONDISPLAY INC
8-K, 2000-05-26
BUSINESS SERVICES, NEC
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<PAGE>

                      SECURITIES AND EXCHANGE COMMISSION

                            Washington, D.C. 20549

                                   FORM 8-K

             CURRENT REPORT Pursuant to Section 13 or 15(d) of the
                       Securities Exchange Act of 1934.

        Date of Report (date of earliest event reported):  May 22, 2000.
                                                           ------------


                                ONDISPLAY, INC.
            ------------------------------------------------------
            (Exact name of Registrant as specified in its charter)

<TABLE>
<CAPTION>
<S>                                             <C>                                        <C>
         Delaware                                    000-28455                                 68-0391052
- ---------------------------------          ------------------------------              -------------------------
(State or other jurisdiction of                (Commission File Number)                     (I.R.S. Employer
incorporation)                                                                             Identification No.)
</TABLE>

            12667 ALCOSTA BOULEVARD, SUITE 250, SAN RAMON, CA  94583
          -----------------------------------------------------------
          (Address of principal executive offices including Zip Code)

                                    (925) 480-1000
              ----------------------------------------------------
              (Registrant's telephone number, including area code)

                                      N/A
         -------------------------------------------------------------
         (Former name or former address, if changed since last report)
<PAGE>

ITEM 5.  CHANGES IN CONTROL OF REGISTRANT.

     On May 22, 2000, the Registrant issued a joint press release with Vignette
Corporation ("Vignette") (attached hereto as Exhibit  99.1) announcing it signed
an Agreement and Plan of Merger by and among Vignette, Wheels Acquisition Corp.
("Wheels"), a wholly owned subsidiary of Vignette, and Registrant (attached
hereto as Exhibit 2.1), pursuant to which (i) Wheels will commence an exchange
offer for all of the issued and outstanding shares of Registrant common stock,
from which (ii) Wheels will merge with and into Registrant and Registrant will
become a wholly owned subsidiary of Vignette.  The exchange and the merger are
subject to customary closing conditions, including the termination or expiration
of a waiting period under the Hart-Scott-Rodino Antitrust Improvements Act.  The
information contained in the press release and the agreement and plan of merger
is incorporated herein by reference.

ITEM 7.  FINANCIAL STATEMENTS AND EXHIBITS.


Exhibit Number      Description
- ---------------     ----------------------------------------------------------
2.1                 Agreement and Plan of Merger by and among Vignette
                    Corporation, Wheels Acquisition Corp. and OnDisplay, Inc.
99.1                OnDisplay, Inc. and Vignette Joint Press Release, dated
                    May 22, 2000.



                                   SIGNATURES

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

Date:  May 26, 2000                 ONDISPLAY, INC.

                                    By:  /s/ Dave Larson
                                         -------------------------------
                                         (name) Dave Larson
                                         -------------------------------
                                         (title) Chief Financial Officer
                                         -------------------------------

<PAGE>

DESCRIPTION:   Agreement and Plan of Merger by and among Vignette
               Corporation, Wheels Acquisition Corp. and OnDisplay, Inc.


                                  EXHIBIT 2.1
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------




                          AGREEMENT AND PLAN OF MERGER

                                  BY AND AMONG

                              VIGNETTE CORPORATION

                            WHEELS ACQUISITION CORP.

                                      AND

                                ONDISPLAY, INC.


<PAGE>

                                 MAY 21, 2000

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                                       TABLE OF CONTENTS

                                                                                                  Page
                                                                                                  ----
<S>                                                                                              <C>
ARTICLE I. The Offer..........................................................................       1
 Section 1.1 The Offer........................................................................       1
 Section 1.2 Company Action...................................................................       3
 Section 1.3 Directors........................................................................       4

ARTICLE II. The Merger........................................................................       5
 Section 2.1  The Merger......................................................................       5
 Section 2.2  Effective Time; Closing.........................................................       5
 Section 2.3  Effect of the Merger............................................................       5
 Section 2.4  Certificate of Incorporation; Bylaws............................................       5
 Section 2.5  Directors and Officers..........................................................       5
 Section 2.6  Effect on Capital Stock.........................................................       6
 Section 2.7  Exchange of Certificates........................................................       7
 Section 2.8  No Further Ownership Rights in Company Common Stock.............................      10
 Section 2.9  Restricted Stock................................................................      10
 Section 2.10 Tax Consequences................................................................      10
 Section 2.11 Taking of Necessary Action; Further Action......................................      10
 Section 2.12 Dissenting Shares...............................................................      11

ARTICLE III. Representations and Warranties of Company........................................      11
 Section 3.1  Oganization; Subsidiaries.......................................................      11
 Section 3.2  Company Capitalization..........................................................      12
 Section 3.3  Obligations With Respect to Capital Stock.......................................      13
 Section 3.4  Authority; Non-Contravention....................................................      13
 Section 3.5  SEC Filings; Company Financial Statements.......................................      15
 Section 3.6  Absence of Certain Changes or Events............................................      16
 Section 3.7  Taxes...........................................................................      17
 Section 3.8  Title to Properties.............................................................      18
 Section 3.9  Intellectual Property...........................................................      18
 Section 3.10 Compliance with Laws............................................................      21
 Section 3.11 Litigation......................................................................      21
 Section 3.12 Employee Benefit Plans..........................................................      22
 Section 3.13 Certain Agreements..............................................................      25
 Section 3.14 Brokers' and Finders' Fees......................................................      26
 Section 3.15 Insurance.......................................................................      26
 Section 3.16 Disclosure......................................................................      26
</TABLE>
<PAGE>

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<S>                                                                                                            <C>

 Section 3.17 Fairness Opinion.............................................................................     27
 Section 3.18 Affiliates...................................................................................     27
 Section 3.19 Lock-up Waivers..............................................................................     27

ARTICLE IV. Representations and Warranties of Parent and Merger Sub........................................     27
 Section 4.1  Organization of Parent and Merger Sub........................................................     27
 Section 4.2  Parent and Merger Sub Capitalization.........................................................     28
 Section 4.3  Obligations With Respect to Capital Stock....................................................     29
 Section 4.4  Authority; Non-Contravention.................................................................     29
 Section 4.5  SEC Filings; Parent Financial Statements.....................................................     30
 Section 4.6  Absence of Certain Changes or Events.........................................................     31
 Section 4.7  Taxes........................................................................................     32
 Section 4.8  Title to Properties..........................................................................     33
 Section 4.9  Intellectual Property........................................................................     33
 Section 4.10 Compliance with Laws.........................................................................     34
 Section 4.11 Litigation...................................................................................     34
 Section 4.12 Brokers' and Finders' Fees...................................................................     35
 Section 4.13 Disclosure Documents.........................................................................     35

ARTICLE V. Conduct Prior To The Effective Time.............................................................     35
 Section 5.1  Conduct of Business by Company...............................................................     35
 Section 5.2  Conduct of Business by Parent................................................................     38

ARTICLE VI. Additional Agreements..........................................................................     39
 Section 6.1  Stockholder Approval; Preparation of Registration Statement and Proxy Statement/Prospectus...     39
 Section 6.2  Antitrust Filings............................................................................     40
 Section 6.3  No Solicitation..............................................................................     41
 Section 6.4  Obligations of Merger Sub....................................................................     43
 Section 6.5  Voting of Shares.............................................................................     43
 Section 6.6  Registration Statement.......................................................................     43
 Section 6.7  Confidentiality; Access to Information.......................................................     43
 Section 6.8  Public Disclosure............................................................................     44
 Section 6.9  Reasonable Efforts; Notification.............................................................     44
 Section 6.10 Stock Options and ESPP.......................................................................     45
 Section 6.11 Form S-8.....................................................................................     46
 Section 6.12 Indemnification..............................................................................     46
 Section 6.13 Nasdaq Listing...............................................................................     47
 Section 6.14 Letters of Accountants.......................................................................     47
 Section 6.15 Takeover Statutes............................................................................     47
 Section 6.16 Certain Employee Benefits....................................................................     47
 Section 6.17 Tax Matters..................................................................................     48
 Section 6.18 Employment Agreement.........................................................................     48
</TABLE>
<PAGE>

<TABLE>
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<S>                                                                                                             <C>
ARTICLE VII. Conditions To The Merger........................................................................   48
 Section 7.1  Conditions to Obligations of Each Party to Effect the Merger...................................   48

ARTICLE VIII. Termination, Amendment and Waiver..............................................................   49
 Section 8.1  Termination....................................................................................   49
 Section 8.2  Notice of Termination; Effect of Termination...................................................   50
 Section 8.3  Fees and Expenses..............................................................................   50
 Section 8.4  Amendment......................................................................................   51
 Section 8.5  Extension; Waiver..............................................................................   51

ARTICLE IX. General Provisions...............................................................................   51
 Section 9.1  Non-Survival of Representations and Warranties.................................................   51
 Section 9.2  Notices........................................................................................   52
 Section 9.3  Interpretation; Certain Defined Terms..........................................................   53
 Section 9.4  Counterparts...................................................................................   54
 Section 9.5  Entire Agreement; Third Party Beneficiaries....................................................   54
 Section 9.6  Severability...................................................................................   54
 Section 9.7  Other Remedies; Specific Performance...........................................................   54
 Section 9.8  Governing Law..................................................................................   54
 Section 9.9  Rules of Construction..........................................................................   55
 Section 9.10 Assignment.....................................................................................   55
 Section 9.11 Waiver Of Jury Trial...........................................................................   55
</TABLE>

                               INDEX OF EXHIBITS

 Exhibit A  Form of Voting Agreement

 Exhibit B  Form of Affiliate Letter
<PAGE>

                          AGREEMENT AND PLAN OF MERGER


This AGREEMENT AND PLAN OF MERGER (this "Agreement") is made and entered into as
of May 21, 2000, among Wheel Corporation, a Delaware corporation ("Parent"),
Wheels Acquisition Corp., a Delaware corporation and a wholly owned first-tier
subsidiary of Parent ("Merger Sub"), and Hubcap, Inc., a Delaware corporation
("Company").

                                    RECITALS

          A.  The respective Boards of Directors of Parent, Merger Sub and
Company have approved this Agreement, and declared advisable that Merger Sub
make an exchange offer (the "Offer") to exchange shares of common stock, par
value $0.01 per share, of Parent ("Parent Common Stock") for all of the issued
and outstanding shares of common stock, par value $0.001 per share ("Company
Common Stock"), of Company (the "Shares") and the merger of Merger Sub with and
into Company (the "Merger") upon the terms and subject to the conditions of this
Agreement and in accordance with the General Corporation Law of the State of
Delaware ("Delaware Law").

          B.  It is intended that, for United States federal income tax
purposes, the Offer and the Merger (together, the "Transaction") shall be
treated as an integrated transaction and shall qualify as a "reorganization"
within the meaning of Section 368(a) of the Internal Revenue Code of 1986, as
amended (the "Code").  For accounting purposes, the Merger is intended to be
accounted for as a "purchase" under United States generally accepted accounting
principles ("GAAP").

          C.  Concurrently with the execution of this Agreement, and as a
condition and inducement to Parent's willingness to enter into this Agreement,
certain stockholders of Company are entering into a Voting Agreement with Parent
in the form of Exhibit A (the "Voting Agreement").

          In consideration of the foregoing and the representations, warranties,
covenants and agreements set forth in this Agreement, the parties agree as
follows:

Article I.
The Offer

        (a)  Section 1.1 The Offer. (a) Provided that (i) this Agreement shall
                         ---------
not have been terminated in accordance with Section 8.1 and (ii) none of the
events set forth in Annex I hereto shall have occurred and be continuing, Merger
Sub shall, as promptly as practicable after the date hereof, commence the Offer.
Each Share accepted by Merger Sub pursuant to the Offer shall be exchanged for
the right to receive from Merger Sub that number of fully paid and nonassessable
shares of Parent Common Stock equal to the Exchange Ratio. For purposes of this
Agreement, the
<PAGE>

"Exchange Ratio" shall mean 1.58. The initial expiration date of the Offer shall
be the twentieth business day following commencement of the Offer. The Offer
shall be subject to the condition that there shall be validly tendered in
accordance with the terms of the Offer prior to the expiration date of the Offer
and not withdrawn a number of Shares which, together with the Shares then owned
by Parent and Merger Sub (if any) represents at least a majority of the total
number of outstanding Shares, assuming the exercise of all currently exercisable
options, rights and convertible securities (if any) and the issuance of all
Shares that Company is obligated to issue thereunder (such total number of
outstanding Shares being hereinafter referred to as the "Fully Diluted Shares")
(the "Minimum Condition") and to the other conditions set forth in Annex I
hereto. Parent and Merger Sub expressly reserve the right to waive the
conditions to the Offer and to make any change in the terms or conditions of the
Offer; provided that, without the prior written consent of Company, no change
may be made which decreases the number of Shares sought in the Offer, changes
the form or amount of consideration to be paid, imposes conditions to the Offer
in addition to those set forth in Annex I, changes or waives the Minimum
Condition or any of the other conditions set forth in Annex I or imposes any
conditions to the Offer in addition to those set forth in Annex I, extends the
Offer (except as set forth in the following two sentences), or makes any other
change to any of the terms and conditions to the Offer which is adverse to the
holders of Shares. Subject to the terms of the Offer and this Agreement and the
satisfaction (or waiver to the extent permitted by this Agreement) of the
conditions to the Offer, Merger Sub shall accept for payment all Shares validly
tendered and not withdrawn pursuant to the Offer as soon as practicable after
the applicable expiration date of the Offer and shall pay for all such Shares
promptly after acceptance; provided that (x) Merger Sub shall extend the Offer
for successive extension periods not in excess of 10 business days per extension
if, at the scheduled expiration date of the Offer or any extension thereof, any
of the conditions to the Offer shall not have been satisfied, until such time as
such conditions are satisfied or waived, and (y) Merger Sub may extend the Offer
if and to the extent required by the applicable rules and regulations of the
Securities Exchange Commission ("SEC"). In addition, Merger Sub may extend the
Offer after the acceptance of Shares thereunder for a further period of time by
means of a subsequent offering period under Rule 14d-11 promulgated under the
Securities Exchange Act of 1934, as amended (the "Exchange Act"), of not more
than 20 business days to meet the objective (which is not a condition to the
Offer) that there be validly tendered, in accordance with the terms of the
Offer, prior to the expiration date of the Offer (as so extended) and not
withdrawn a number of Shares which, together with Shares then owned by Parent
and Merger Sub, represents at least 90% of the outstanding Shares.
Notwithstanding anything to the contrary set forth herein, no certificates or
scrip representing fractional shares of Parent Common Stock shall be issued in
connection with the exchange of Parent Common Stock for Shares upon consummation
of the Offer, and in lieu thereof each tendering stockholder who would otherwise
be entitled to a fractional share of Parent Common Stock in the Offer will be
paid an amount in cash equal to the product obtained by multiplying (A) the
fractional share interest to which such holder would otherwise be entitled by
(B) the closing price for a share of Parent Common Stock as reported on the
NASDAQ National Market System on the first date Merger Sub accepts Shares for
exchange in the Offer.

          (b) As soon as practicable after the date of this Agreement, Parent
shall prepare and file with the SEC a registration statement on Form S-4 to
register the offer and sale of Parent Common Stock pursuant to the Offer (the
"Registration Statement"). The Registration Statement will include a preliminary
prospectus containing the information required under Rule 14d-4(b)
<PAGE>

promulgated under the Exchange Act (the "Preliminary Prospectus"). As soon as
practicable on the date of commencement of the Offer, Parent and Merger Sub
shall (i) file with the SEC a Tender Offer Statement on Schedule TO with respect
to the Offer which will contain or incorporate by reference all or part of the
Preliminary Prospectus and form of the related letter of transmittal (together
with any supplements or amendments thereto, collectively the "Offer Documents")
and (ii) cause the Offer Documents to be disseminated to holders of Shares.
Parent, Merger Sub and Company each agree promptly to correct any information
provided by it for use in the Registration Statement or the Offer Documents if
and to the extent that it shall have become false or misleading in any material
respect, Parent and Merger Sub agree to take all steps necessary to cause the
Offer Documents as so corrected to be filed with the SEC and to be disseminated
to holders of Shares, in each case as and to the extent required by applicable
federal securities laws. Company and its counsel shall be given a reasonable
opportunity to review and comment on the Schedule TO, the Registration Statement
and the Offer Documents and any material amendments thereto prior to their being
filed with the SEC.

        (b)  Section 1.2 Company Action. (a) Company hereby consents to the
                         --------------
Offer and represents that its Board of Directors, at a meeting duly called and
held, has by unanimous vote of the directors participating therein (i)
determined that this Agreement and the transactions contemplated hereby,
including the Offer and the Merger, are advisable and are fair to and in the
best interest of Company's stockholders, (ii) approved and adopted this
Agreement and the transactions contemplated hereby, including the Offer and the
Merger, which approval constitutes approval under Section 203 of Delaware Law
such that the Offer, the Merger, this Agreement and the other transactions
contemplated hereby are not and shall not be subject to any restriction pursuant
to Section 203 of Delaware Law, and (iii) resolved to recommend acceptance of
the Offer and approval and adoption of this Agreement and the Merger by
Company's stockholders (the recommendations referred to in this clause (iii) are
collectively referred to in this Agreement as the "Recommendations"). Company
further represents that FleetBoston Robertson Stephens Inc. has rendered to
Company's Board of Directors its opinion that the consideration to be received
by Company's stockholders pursuant to this Agreement is fair to such
stockholders from a financial point of view. Company has been advised that all
of its directors and executive officers currently intend to tender their Shares
pursuant to the Offer.
          (b) As soon as practicable on the day that the Offer is commenced,
Company will file with the SEC and disseminate to holders of Shares a
Solicitation/Recommendation Statement on Schedule 14D-9 (the "Schedule 14D-9")
which shall, subject to Section 6.3(b), reflect the Recommendations. Company,
Parent and Merger Sub each agree promptly to correct any information provided by
it for use in the Schedule 14D-9 if and to the extent that it shall have become
false or misleading in any material respect. Company agrees to take all steps
necessary to cause the Schedule 14D-9 as so corrected to be filed with the SEC
and to be disseminated to holders of Shares, in each case as and to the extent
required by applicable federal securities laws. Parent and its counsel shall be
given a reasonable opportunity to review and comment on the Schedule 14D-9 and
any material amendments thereto prior to its being filed with the SEC.

          (c) Company will promptly furnish Parent and Merger Sub pursuant to
the terms of the Confidentiality Agreement, dated as of May 1, 2000, between
Company and Parent (the "Confidentiality Agreement") with a list of its
stockholders, mailing labels and any available
<PAGE>

listing or computer file containing the names and addresses of all record
holders of Shares and lists of securities positions of Shares held in stock
depositories, in each case as of the most recent practicable date, and will
provide to Parent and Merger Sub such additional information (including, without
limitation, updated lists of stockholders, mailing labels and lists of
securities positions) and such other assistance as Parent or Merger Sub may
reasonably request in connection with the Offer.

        (c)  Section 1.3 Directors. (a) Effective upon the acceptance for
                         ---------
payment by Merger Sub of Shares pursuant to the Offer (the "Appointment Time"),
Parent shall be entitled to designate the number of directors, rounded up to the
next whole number, on Company's Board of Directors that equals the product of
(i) the total number of directors on Company's Board of Directors (giving effect
to the election of any additional directors pursuant to this Section 1.3) and
(ii) the percentage that the number of Shares owned by Parent or Merger Sub
(including Shares accepted for payment) bears to the total number of Shares
outstanding, and Company shall take all action reasonably necessary to cause
Parent's designees to be elected or appointed to Company's Board of Directors,
including, without limitation, increasing the number of directors, or seeking
and accepting resignations of incumbent directors, or both; provided that, prior
to the Effective Time (as defined below), Company's Board of Directors shall
always have at least two members who were directors of Company prior to
consummation of the Offer (each, a "Continuing Director"). If the number of
Continuing Directors is reduced to less than two for any reason prior to the
Effective Time, the remaining and departing Continuing Directors shall be
entitled to designate a person to fill the vacancy. Notwithstanding anything in
this Agreement to the contrary, if Parent's designees are elected to Company's
Board of Directors prior to the Effective Time, the affirmative vote of the
Continuing Directors shall be required for Company to (a) amend or terminate
this Agreement or agree or consent to any amendment or termination of this
Agreement, (b) waive any of Company's or any Company stockholder's rights,
benefits or remedies hereunder, (c) extend the time for performance of Parent's
and Merger Sub's respective obligations hereunder, or (d) approve any other
action by Company which is reasonably likely to adversely affect the interests
of the stockholders of Company (other than Parent, Merger Sub and their
affiliates (other than Company and its subsidiaries)), with respect to the
transactions contemplated by this Agreement.
          (b) Company's obligations to appoint designees to its board of
directors shall be subject to Section 14(f) of the Exchange Act and Rule 14f-l
promulgated thereunder. Company shall promptly take all actions required
pursuant to Section 1.3 and Rule 14f-l in order to fulfill its obligations under
this Section 1.3 and shall include in the Schedule 14D-9 such information with
respect to Company and its officers and directors as is required under Section
14(f) and Rule 14f-l to fulfill its obligations under this Section 1.3. Parent
will supply to Company in writing and be solely responsible for any information
with respect to itself and its nominees, officers, directors and affiliates
required by Section 14(f) and Rule 14f-1.

Article II.
The Merger
        (d)  Section 2.1 The Merger. Upon the terms and subject to the
                         ----------
conditions of this Agreement and the applicable provisions of Delaware Law, at
the Effective Time, Merger Sub shall
<PAGE>

be merged with and into Company, the separate corporate existence of Merger Sub
shall cease, and Company shall continue as the surviving corporation of the
Merger (the "Surviving Corporation").

        (e)  Section 2.2 Effective Time; Closing. Subject to the provisions of
                         -----------------------
this Agreement, Company and Merger Sub will file a certificate of merger, in
such appropriate form as determined by the parties, 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") as soon as practicable on or
after the Closing Date. The closing of the Merger (the "Closing") shall take
place at the offices of Davis Polk & Wardwell, 1600 El Camino Real, Menlo Park,
California, 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 VII, or at such other time, date and location as
the parties hereto agree in writing (the "Closing Date").

        (f)  Section 2.3 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, at
the Effective Time, the Surviving Corporation shall possess all the property,
rights, privileges, powers and franchises of Company and Merger Sub, and shall
be subject to all debts, liabilities and duties of Company and Merger Sub.

        (g)  Section 2.4 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 Article I of the Certificate of
Incorporation of the Surviving Corporation shall be amended to read: "The name
of the corporation is "OnDisplay, Inc.""
          (b) At the Effective Time, the Bylaws of Merger Sub, as in effect
immediately prior to the Effective Time, shall be the Bylaws of the Surviving
Corporation until thereafter amended.

        (h)  Section 2.5 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 Company immediately prior to the Effective Time, until their
respective successors are duly appointed.

        (i)  Section 2.6 Effect on Capital Stock. Subject to the terms and
                         -----------------------
conditions of this Agreement, 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 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 2.6(b),
will be canceled and extinguished and automatically converted (subject to
Section 2.6(e)) into the right to receive the number of shares of Parent Common
Stock equal to the Exchange Ratio upon surrender of the certificate representing
such share of Company Common Stock in the manner provided in Section
<PAGE>

2.7 (together with the cash in lieu of fractional shares of Parent Common Stock
as specified below, the "Merger Consideration"). No fraction of a share of
Parent Common Stock will be issued by virtue of the Merger, but in lieu thereof,
a cash payment shall be made pursuant to Section 2.7(e).

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

          (c) Stock Options; Employee Stock Purchase Plan; Warrants.  At the
Effective Time, all options or warrants to purchase Company Common Stock then
outstanding, whether under (i) Company's 1996 Stock Plan (the "Company Stock
Option Plan"), (ii) the Oberon Software Incorporated 1990 Stock Option Plan (the
"Oberon 1990 Plan"), (iii) the Oberon Software Incorporated 1998 Stock Incentive
Plan (the "Oberon 1998 Plan," and together with the Company Stock Option Plan
and the Oberon 1990 Plan, the "Company Option Plans"), or (iv) otherwise, shall
be assumed by Parent in accordance with Section 6.10 of this Agreement.  Rights
outstanding under Company's 1999 Employee Stock Purchase Plan (the "Company
ESPP") shall be treated as set forth in Section 6.10 of this Agreement.

          (d) Capital Stock of Merger Sub.  Each share of common stock, par
value $0.01 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.  Following the Effective Time,
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.  If, during the period between the
date of this Agreement and the Effective Time, any change in the outstanding
shares of capital stock of Parent or Company shall occur, including by reason of
any reclassification, recapitalization, stock split or combination, exchange or
readjustment of shares, or any stock dividend thereon with a record date during
such period, the Exchange Ratio, the Merger Consideration and any other amounts
payable pursuant to the Offer, the Merger or otherwise pursuant to this
Agreement shall be appropriately adjusted.

        (j)  Section 2.7 Exchange of Certificates. to Company to act as the
                         ------------------------
exchange agent (the "Exchange Agent") in the Merger.
          (b) Exchange Fund.  Promptly after the Effective Time, Parent shall
make available to the Exchange Agent for exchange in accordance with this
Article II, the shares of Parent Common Stock (such shares of Parent Common
Stock, together with cash in lieu of fractional shares and any dividends or
distributions with respect thereto, are hereinafter referred to as the "Exchange
Fund") issuable pursuant to Section 2.6 in exchange for outstanding shares of
Company Common Stock.

          (c) Exchange Procedures.  Promptly after the Effective Time, Parent
shall instruct the Exchange Agent to mail to each holder of record of a
certificate or certificates ("Certificates")
<PAGE>

which immediately prior to the Effective Time represented outstanding shares of
Company Common Stock whose shares were converted into the right to receive
shares of Parent Common Stock pursuant to Section 2.6, (i) a letter of
transmittal in customary form (that shall specify that delivery shall be
effected, and risk of loss and title to the Certificates shall pass, only upon
proper 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. Upon surrender of Certificates for
cancellation to the Exchange Agent 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 that such holders have the
right to receive pursuant to Section 2.7(e) and any dividends or distributions
payable pursuant to Section 2.7(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, to
evidence only the right to receive 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 2.7(e) and any dividends or
distributions payable pursuant to Section 2.7(d). No interest will be paid or
accrued on any cash in lieu of fractional shares of Parent Common Stock or on
any unpaid dividends or distributions payable to holders of Certificates. In the
event of a transfer of ownership of shares of Company Common Stock which is not
registered in the transfer records of Company, a certificate representing the
proper number of shares of Parent Common Stock may be issued to a transferee if
the Certificate representing such shares of Company Common Stock is presented to
the Exchange Agent, accompanied by all documents required to evidence and effect
such transfer and by evidence that any applicable stock transfer taxes have been
paid.

          (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 holders of certificates representing whole shares of Parent Common Stock
issued in exchange therefor, without interest, (i) promptly, the amount of any
cash payable with respect to a fractional share of Parent Common Stock to which
such holder is entitled pursuant to Section 2.7(e) and the amount of dividends
or other distributions with a record date after the Effective Time theretofore
paid with respect to such whole shares of Parent Common Stock, and (ii) at the
appropriate payment date, the amount of dividends or other distributions with a
record date after the Effective Time but prior to surrender and a payment date
occurring after surrender, payable with respect to such whole shares of Parent
Common Stock.

          (e) Fractional Shares.  (i) As promptly as practicable following the
Effective Time, the Exchange Agent shall determine the excess of (A) the number
of full shares of Parent Common Stock delivered to the Exchange Agent pursuant
to Section 2.7(b), over (B) the aggregate number of full shares of Parent Common
Stock to be distributed to holders of Company Common Stock pursuant to Section
2.7(c) (such excess, the "Excess Shares").  Following the Effective Time,
<PAGE>

the Exchange Agent, as agent for the holders of Company Common Stock, shall sell
the Excess Shares at then prevailing prices on NASDAQ National Market System in
the manner set forth in paragraph (ii) of this Section 2.7(e).

               (ii)   The sale of the excess shares by the Exchange Agent shall
          be executed on the NASDAQ National Market System and shall be executed
          in round lots to the extent practicable. The Exchange Agent shall use
          all commercially reasonable efforts to complete the sale of the Excess
          Shares as promptly following the Effective Time as, in the Exchange
          Agent's reasonable judgment, is practicable consistent with obtaining
          the best execution of such sales in light of prevailing market
          conditions. Until the net proceeds of such sales have been distributed
          to the holders of Company Common Stock, the Exchange Agent will hold
          such proceeds in trust for the holders of Company Common Stock. The
          Exchange Agent will determine the portion of such net proceeds to
          which each holder of Company Common Stock shall be entitled, if any,
          by multiplying the amount of the aggregate net proceeds by a fraction
          the numerator of which is the amount of the fractional share interest
          to which such holder of Company Common Stock is entitled (after taking
          into account all shares of Parent Common Stock to be issued to such
          holder) and the denominator of which is the aggregate amount of
          fractional share interests to which all holders of Company Common
          Stock are entitled. As soon as practicable after the determination of
          the amount of cash, if any, to be paid to holders of Company Common
          Stock with respect to fractional share interests, the Exchange Agent
          shall promptly pay such amounts to such holders of Company Common
          Stock in accordance with the terms of Section 2.7(c).

               (iii)  Notwithstanding the provisions of paragraphs (i) and (ii)
          of this Section 2.7(e), Parent may decide, at its option, exercised
          prior to the Effective Time, in lieu of the issuance and sale of
          Excess Shares and the making of the payments contemplated in such
          paragraphs, that Parent shall pay to the Exchange Agent an amount
          sufficient for the Exchange Agent to pay each holder of Company Common
          Stock the amount such holder would have received pursuant to Section
          2.7(e)(ii) assuming that the sales of Parent Common Stock were made at
          a price equal to the average of the closing prices of the Parent
          Common Stock on the NASDAQ National Market System for the ten
          consecutive trading days immediately following the Effective Time and,
          in such case, all references herein to the cash proceeds of the sale
          of the Excess Shares and similar references shall be deemed to mean
          and refer to the payments calculated as set forth in this paragraph
          (iii).  In such event, Excess Shares shall not be issued or otherwise
          transferred to the Exchange Agent pursuant to Sections 2.7(b) or (e).

          (f) Required Withholding.  Each of the Exchange Agent, Parent and the
Surviving Corporation shall be entitled to deduct and withhold from any
consideration payable or otherwise deliverable pursuant to this Agreement to any
holder or former holder of Company Common Stock such amounts as may be required
to be deducted or withheld therefrom under the Code or under any provision of
state, local or foreign tax law or under any other applicable Legal Requirement
(as defined in Section 3.2(c)).  To the extent such amounts are so deducted or
withheld,
<PAGE>

such amounts shall be treated for all purposes under this Agreement as
having been paid to the person to whom such amounts would otherwise have been
paid.

          (g) Lost, Stolen or Destroyed Certificates.  In the event that 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
2.6, cash for fractional shares, if any, as may be required pursuant to Section
2.7(e) and any dividends or distributions payable pursuant to Section 2.7(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 bond in such sum as it may
reasonably direct as 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.

          (h) No Liability.  Notwithstanding anything to the contrary in this
Section 2.7, 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.

          (i) Termination of Exchange Fund.  Any portion of the Exchange Fund
which remains undistributed to the holders of Company Common Stock for six
months after the Effective Time shall be delivered to Parent, upon demand, and
any holders of Company Common Stock who have not theretofore complied with the
provisions of this Section 2.7 shall thereafter look only to Parent for the
shares of Parent Common Stock, any cash in lieu of fractional shares of Parent
Common Stock to which they are entitled pursuant to Section 2.7(e) and any
dividends or other distributions with respect to Parent Common Stock to which
they are entitled pursuant to Section 2.7(d), in each case, without any interest
thereon.

        (k)  Section 2.8  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 2.7(d) and (e))
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 that 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 II.

        (l)  Section 2.9 Restricted Stock. If any shares of Company Common Stock
                         ----------------
that are outstanding immediately prior to the Effective Time are unvested or are
subject to a repurchase option, risk of forfeiture or other condition providing
that such shares ("Company Restricted Stock") may be forfeited or repurchased by
Company upon any termination of the stockholders' employment, directorship or
other relationship with Company (and/or any affiliate of Company) under the
terms of any restricted stock purchase agreement or other agreement with Company
that
<PAGE>

does not by its terms provide that such repurchase option, risk of forfeiture or
other condition lapses upon consummation of the Merger, then the shares of
Parent Common Stock issued upon the conversion of such shares of Company Common
Stock in the Merger will continue to be unvested and subject to the same
repurchase options, risks of forfeiture or other conditions following the
Effective Time, and the certificates representing such shares of Parent Common
Stock may accordingly be marked with appropriate legends noting such repurchase
options, risks of forfeiture or other conditions. Company shall take all actions
that may be necessary to ensure that, from and after the Effective Time, Parent
is entitled to exercise any such repurchase option or other right set forth in
any such restricted stock purchase agreement or other agreement. A listing of
the holders of Company Restricted Stock, together with the number of shares and
the vesting schedule of Company Restricted Stock held by each, and any
information concerning any elections timely made under Section 83(b) of the
Code, is set forth in Part 2.9 of the Company Disclosure Letter.

        (m)  Section 2.10 Tax Consequences. It is intended by the parties hereto
                          ----------------
that the Transaction shall constitute a "reorganization" within the meaning of
Section 368(a) 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.

        (n)  Section 2.11 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, Merger Sub and the Surviving Corporation will take all
such lawful and necessary action in the name of Company or Merger Sub. Parent
shall cause Merger Sub to perform all of its obligations relating to this
Agreement and the transactions contemplated hereby.

(o)  Section 2.12  Dissenting Shares.  Notwithstanding Section 2.6, if the
                   -----------------
Merger is effectuated pursuant to Section 253 of Delaware Law, Shares
outstanding immediately prior to the Effective Time and held by a holder who has
demanded appraisal for such Shares in accordance with Delaware Law shall not be
converted into a right to receive the Merger Consideration, unless such holder
fails to perfect or withdraws or otherwise loses his or her right to appraisal.
If after the Effective Time such holder fails to perfect or withdraws or loses
his or her right to appraisal, such Shares shall be treated as if they had been
converted as of the Effective Time into a right to receive the Merger
Consideration. Company shall give Parent prompt notice of any demands received
by Company for appraisal of Shares, and Parent shall have the right to
participate in all negotiations and proceedings with respect to such demands.
Company shall not, except with the prior written consent of Parent, make any
payment with respect to, or settle or offer to settle, any such demands.  Any
amounts paid to a holder pursuant to a right of appraisal will be paid by
Company.

Article III.
Representations and Warranties of Company

As of the date of this Agreement and as of the Closing Date, except as disclosed
          in (i) Company's Annual Report on Form 10-K for the year ending
          December 31, 1999 and any Company SEC Reports (as defined below) filed
          subsequent to such Form 10-K and prior to the date of this Agreement,
          or (ii) the disclosure letter delivered by Company to Parent dated as
          of the date hereof and certified by a duly authorized officer of
<PAGE>

          Company (the "Company Disclosure Letter"), Company represents and
          warrants to Parent and Merger Sub as follows:

        (p)  Section 3.1 Organization; Subsidiaries. (a) Company and each of its
                         --------------------------
subsidiaries is a corporation duly organized, validly existing and in good
standing under the laws of the jurisdiction of its incorporation and has all
requisite corporate power and authority, and all requisite qualifications to do
business as a foreign corporation, to conduct its business in the manner in
which its business is currently being conducted, except where the failure to
have such qualifications would not, individually or in the aggregate, have a
Material Adverse Effect (as defined in Section 9.3) on Company.

          (b) Neither Company nor any of its subsidiaries identified in Part 3.1
of the Company Disclosure Letter owns any capital stock of, or any equity
interest of any nature in, any corporation, partnership, joint venture
arrangement or other business entity, except for passive investments in equity
interests of public companies as part of the cash management program of Company.
Neither Company nor any of its subsidiaries has agreed or is obligated to make,
or is bound by any written, oral or other agreement, contract, subcontract,
lease, binding understanding, instrument, note, option, warranty, purchase
order, license, sublicense, insurance policy, benefit plan or legally binding
commitment or undertaking of any nature, as in effect as of the date hereof or
as may hereinafter be in effect under which it may become obligated to make any
future material investment in or material capital contribution to any other
entity.  Neither Company, nor any of its subsidiaries, is a general partner of
any general partnership, limited partnership or other similar entity.  Part 3.1
of the Company Disclosure Letter indicates the jurisdiction of organization of
each subsidiary of the Company and Company's direct or indirect 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 (collectively, the "Company Charter Documents"), 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 Company Charter Documents.

        (q)  Section 3.2 Company Capitalization. (a) The authorized capital
                         ----------------------
stock of Company consists solely of 100,000,000 shares of Company Common Stock,
of which there were 22,636,902 shares issued and outstanding as of May 16, 2000,
and 10,000,000 shares of preferred stock, par value $0.001 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 the date of this Agreement, there are
no shares of Company Common Stock held in treasury by Company. From and after
the Effective Time, the shares of Parent Common Stock issued in exchange for any
shares of Company Restricted Stock will, without any further act of Parent,
Company or any other person, become subject to the restrictions, conditions and
other provisions of such Company Restricted Stock, and Parent will automatically
succeed to and become entitled to exercise Company's rights and remedies under
such Company Restricted Stock.
          (b) As of the close of business on May 19, 2000, (i) 4,258,687 shares
of Company Common Stock are subject to issuance pursuant to outstanding options
to purchase Company
<PAGE>

Common Stock under the Company Stock Option Plan, the Oberon 1990 Plan, the
Oberon 1998 Plan (collectively, the "Company Options"), and (ii) 1,500,000
shares of Company Common Stock are reserved for future issuance under the
Company ESPP. Part 3.2(b) of the Company Disclosure Letter sets forth the
following information with respect to each Company Option outstanding as of the
date of this Agreement: (i) the name of the optionee; (ii) the number of shares
of Company Common Stock subject to such Company Option; (iii) the exercise price
of such Company Option; (iv) the date on which such Company Option was granted
or assumed; (v) the date on which such Company Option expires and (vi) whether
the exercisability of such option will be accelerated in any way by the
transactions contemplated by this Agreement, and indicates the extent of any
such acceleration. Company has made available to Parent an accurate and complete
copy of the Company Stock Option Plan, the Oberon 1990 Plan, the Oberon 1998
Plan, the Company ESPP and the standard forms of stock option agreements
evidencing Company Options. There are no options outstanding to purchase shares
of Company Common Stock other than pursuant to the Company Stock Option Plans.
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, will be duly authorized, validly issued, fully paid and
nonassessable.

          (c) All outstanding shares of Company Common Stock, all outstanding
Company Options, and all outstanding shares of capital stock of each subsidiary
of Company have been issued and granted in compliance in all material respects
with (i) all applicable securities laws and other applicable Legal Requirements
and (ii) all requirements set forth in applicable agreements or instruments.
For the purposes of this Agreement, "Legal Requirements" means any federal,
state, local, municipal, foreign or other law, statute, constitution, principle
of common law, resolution, ordinance, code, edict, decree, rule, regulation,
ruling or requirement issued, enacted, adopted, promulgated, implemented or
otherwise put into effect by or under the authority of any Governmental Entity
(as defined in Section 3.4).

        (r)  Section 3.3 Obligations With Respect to Capital Stock. Except as
                         -----------------------------------------
set forth in Section 3.2 hereof or Part 3.3 of the Company Disclosure Letter,
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. Company owns all of the securities of its subsidiaries
identified on Part 3.1 of the Company Disclosure Letter, free and clear of all
claims and Encumbrances, and there are no other 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. For purposes
of this Agreement, "Encumbrances" means any lien, pledge, hypothecation, charge,
mortgage, security interest, encumbrance, claim, infringement, interference,
option, right of first refusal, preemptive right, community property interest or
restriction of any nature (including any restriction on the voting of any
security, any restriction on the transfer of any security or other asset, any
restriction on the receipt of any income derived from any asset, any restriction
on the use of any asset and any restriction on the possession, exercise or
transfer of any other attribute of ownership of any asset). There are no
subscriptions, options, warrants, equity securities, partnership interests or
similar ownership interests, calls, rights (including preemptive rights),
commitments or agreements
<PAGE>

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. There are no registration rights 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.

        (t)  Section 3.4 Authority; Non-Contravention. (a) Company has all
                         ----------------------------
requisite corporate power and authority to enter into this Agreement and,
subject to the Company Stockholder Approvals (as defined below), to consummate
the transactions contemplated hereby. 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 (the "Company Stockholder Approvals") and
the filing of the Certificate of Merger pursuant to Delaware Law. The
affirmative vote of the holders of a majority of the outstanding shares of
Company Common Stock is sufficient for Company's stockholders to approve and
adopt this Agreement and approve the Merger, and no other approval of any holder
of any securities of Company is required in connection with the consummation of
the transactions contemplated hereby. This Agreement has been duly executed and
delivered by Company and, assuming the due execution and delivery by Parent and
Merger Sub, constitutes the 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 affecting the rights of creditors
generally and general principles of equity.
          (b) The execution and delivery of this Agreement by Company does not,
and the performance of this Agreement by Company will not, (i) conflict with or
violate Company Charter Documents, (ii) subject to obtaining Company Stockholder
Approvals and compliance with the requirements set forth in Section 3.4(c),
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, or
(iii) result in any breach of or constitute a default (or an event that with
notice or lapse of time or both would become a 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 an Encumbrance on any of the
properties or assets of Company or any of its subsidiaries pursuant to, any
note, bond, mortgage, indenture, 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, except, in the case of
clauses (ii) and (iii), for such conflicts, violations, breaches, defaults,
impairments, or rights which, individually or in the aggregate, would not have a
Material Adverse Effect on Company.

          (c) No action by or in respect of, or filing with any court,
administrative agency or commission or other governmental authority or
instrumentality, foreign, domestic or supranational ("Governmental Entity") or
other person, is required to be obtained or made by
<PAGE>

Company in connection with the execution and delivery of this Agreement or the
consummation by Company of the transactions contemplated hereby, except for (i)
the filing of the Certificate of Merger with the Secretary of State of the State
of Delaware and appropriate documents with the relevant authorities of other
states in which Company is qualified to do business, (ii) compliance with any
applicable requirements of the Securities Act of 1933, as amended (the
"Securities Act"), the Exchange Act, and any other applicable securities law,
whether state or foreign, (iii) such filings as may be required under the Hart-
Scott-Rodino Antitrust Improvements Act of 1976, as amended (the "HSR Act"), and
(iv) such other consents, authorizations, filings, approvals and registrations
which if not obtained or made would not have a Material Adverse Effect on
Company or the Surviving Corporation or have a material adverse effect on the
ability of Company to consummate the transactions contemplated by this
Agreement.

        (u)  Section 3.5 SEC Filings; Company Financial Statements. (a) Company
                         -----------------------------------------
has filed all forms, reports and documents required to be filed by Company with
the SEC since the effective date of the registration statement for Company's
initial public offering 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, 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, except to the extent corrected prior to the date of this
Agreement by a subsequently filed Company SEC Report. 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 of the Company
(including, in each case, any related notes thereto) contained in the Company
SEC Reports (the "Company Financials"), including each Company SEC Report filed
after the date hereof until the Closing, (i) comply as to form in all material
respects with the published rules and regulations of the SEC with respect
thereto, (ii) are 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 under Form 10-Q, 8-K or any successor form under the Exchange Act)
and (iii) fairly present 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. Each of the financial
statements of Oberon Software Incorporated ("Oberon") (including, in each case,
any related notes thereto) contained in the Company SEC Reports, including each
Company SEC Report filed after the date hereof until the Closing, (i) comply as
to form in all material respects with the published rules and regulations of the
SEC with respect thereto, (ii) are prepared in accordance with GAAP applied on a
consistent basis throughout the periods involved (except as may be indicated in
the notes thereto), and (iii) fairly present the financial
<PAGE>

position of Oberon as at the respective dates thereof and the results of
Oberon's operations and cash flows for the periods indicated.

          The balance sheet of Company contained in the Company SEC Reports as
of March 31, 2000 is hereinafter referred to as the "Company Balance Sheet."
Except as disclosed in the Company Financials or in the Company SEC Documents
filed, in each case, prior to the date hereof, neither Company nor any of its
subsidiaries has any material liabilities or obligations (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
Company Balance Sheet in the ordinary course of business consistent with past
practices and liabilities.

          (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.

        (v)  Section 3.6 Absence of Certain Changes or Events. (a) Since the
                         ------------------------------------
date of the Company Balance Sheet the business of Company and its subsidiaries
has been conducted in the ordinary course consistent with past practices (other
than the transactions contemplated by this Agreement) and, there has not been
(i) any event, occurrence, development or state of circumstances or facts that
has had or would reasonably be expected to have, individually or in the
aggregate, a Material Adverse Effect 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 which are not, individually or
in the aggregate, material in amount from employees following their termination
pursuant to the terms of their pre-existing stock option or purchase agreements,
(iii) any material change by Company in its accounting methods, principles or
practices, except as required by concurrent changes in GAAP, or (iv) any
revaluation by Company of any of its material assets, other than in the ordinary
course of business.

          (b) Since the date of the Company Balance Sheet and through the date
of this Agreement, there has not been (i) any amendment of any material term of
any outstanding security of the Company or any of its subsidiaries, (ii) any
incurrence, assumption or guarantee by Company or any of its Subsidiaries of any
indebtedness for borrowed money other than in the ordinary course of business
and in amounts and on terms consistent with past practices, (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 to any of their officers or
employees, or any payment by Company or any of its subsidiaries of any bonus to
any of their officers or employees, or any granting by Company or any of its
subsidiaries of any increase in severance or termination pay, other than in the
ordinary course, consistent with past practice, or any entry by Company or any
of its subsidiaries into, or material modification or amendment of, any
currently effective employment, severance, termination or indemnification
agreement or any
<PAGE>

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) any creation or other incurrence by Company or
any of its Subsidiaries of any Lien on any material asset other than in the
ordinary course of business consistent with past practices, (vi) any making of
any material loan, advance or capital contributions to or investment in any
Person other than loans, advances or capital contributions to or investments in
its wholly-owned subsidiaries (or advances to employees) in the ordinary course
of business consistent with past practices, (vii) any damage, destruction or
other casualty loss (whether or not covered by insurance) affecting the business
or assets of Company or any of its Subsidiaries that has had or would reasonably
be expected to have, individually or in the aggregate, a Material Adverse Effect
on Company, or (viii) any material change in the pricing of the license fees
Company charges for licensing its software.

        (w)  Section 3.7 Taxes. (a) Company and each of its subsidiaries have
                         -----
timely filed all material federal, state, local and foreign returns, estimates,
information statements and reports ("Returns") relating to Taxes required to be
filed by or on behalf of Company and each of its subsidiaries with any Tax
authority. Such Returns are true, correct and complete in all material respects,
and Company and each of its subsidiaries have paid all Taxes shown to be due on
such Returns.

          (b) Company and each of its subsidiaries 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, except such Taxes as
are not material to Company.

          (c) Neither Company nor any of its subsidiaries has been delinquent in
the payment of any material Tax, nor is there any material Tax deficiency
outstanding, proposed or assessed against Company or any of its subsidiaries.
Company and its subsidiaries have not executed any unexpired waiver of any
statute of limitations on or extending the period for the assessment or
collection of any Tax.

          (d) 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 that is reasonably likely to result in any adjustment that is
material to Company.

          (e) 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
that is reasonably likely to be material to Company.

          (f) Neither Company nor any of its subsidiaries has any material
liability for unpaid Taxes which have not been accrued for or reserved on
Company Balance Sheet in accordance with GAAP, whether asserted or unasserted,
contingent or otherwise, 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.
<PAGE>

          (g) There is no agreement, plan or arrangement to which Company or any
of its subsidiaries is a party, including this Agreement and the agreements
entered into in connection with this Agreement, covering any employee or former
employee of Company or any of its subsidiaries that, individually or
collectively, would be reasonably likely to give rise to the payment of any
amount that would not be deductible pursuant to Sections 280G, 404 or 162(m) of
the Code.

          (h) 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.

          (i) 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.

          (j) Company and its subsidiaries have not been and will not be
required to include any adjustment in taxable income for any Tax period (or
portion thereof) pursuant to Section 481 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.

          (k) Company has not been distributed in a transaction qualifying under
Section 355 of the Code within the last two years, nor has Company distributed
any corporation in a transaction qualifying under Section 355 of the Code within
the last two years.

          (l) Company is not aware of any fact, circumstance, plan or intention
on the part of Company that would be reasonably likely to prevent the
Transaction from qualifying as a "reorganization" within the meaning of Section
368(a) of the Code.

For the purposes of this Agreement, "Tax" or "Taxes" refers to (i) 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, (ii) any
liability for payment of any amounts of the type described in clause (i) as a
result of being a member of an affiliated consolidated, combined or unitary
group, and (iii) any liability for amounts of the type described in clauses (i)
and (ii) as a result of any express or implied obligation to indemnify another
person or as a result of 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.

        (x)  Section 3.8 Title to Properties. (a) Company does not own and has
                         -------------------
not owned any real property interests. Part 3.8 of the Company Disclosure Letter
list all real property leases to which Company is a party and each amendment
thereto that is in effect as of the date of this Agreement that provide for
annual payments in excess of $500,000. 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
<PAGE>

lapse of time, or both, would constitute a default) that would give rise to a
material claim against Company.
          (b) Company 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 Encumbrances, except as reflected in the Company
Financials and except for liens for Taxes not yet due and payable and such
Encumbrances which are not material in character, amount or extent.

        (y)  Section 3.9 Intellectual Property. For the purposes of this
                         ---------------------
Agreement, the following terms have the following definitions:
"Intellectual Property" shall mean any or all of the following and all rights
in, arising out of, or associated therewith:  (i) all United States,
international and foreign patents and applications therefor and all reissues,
divisions, renewals, extensions, provisionals, continuations and continuations-
in-part thereof; (ii) all inventions (whether patentable or not), invention
disclosures, improvements, trade secrets, proprietary information, know how,
technology, technical data and customer lists, and all documentation relating to
any of the foregoing; (iii) all copyrights, copyrights registrations and
applications therefor, and all other rights corresponding thereto throughout the
world; (iv) all industrial designs and any registrations and applications
therefor throughout the world; (v) all trade names, URLs, logos, common law
trademarks and service marks, trademark and service mark registrations and
applications therefor throughout the world; (vi) all databases and data
collections and all rights therein throughout the world; (vii) all moral and
economic rights of authors and inventors, however denominated, throughout the
world, and (viii) any similar or equivalent rights to any of the foregoing
anywhere in the world.
"Company Intellectual Property" shall mean any Intellectual Property that is
owned by, or exclusively licensed to, Company or one of its subsidiaries.
"Registered Intellectual Property" means all United States, international and
foreign:  (i) patents and patent applications (including provisional
applications); (ii) registered trademarks, applications to register trademarks,
intent-to-use applications, or other registrations or applications related to
trademarks; (iii) registered copyrights and applications for copyright
registration; and (iv) any other Intellectual Property that is the subject of an
application, certificate, filing, registration or other document issued, filed
with, or recorded by any Governmental Entity.
"Company Registered Intellectual Property" means all of the Registered
Intellectual Property owned by, or filed in the name of, Company or one of its
subsidiaries.
          (a) No material Company Intellectual Property or product or service of
Company is subject to any proceeding or outstanding decree, order, judgment,
agreement, or stipulation (other than those imposed by applicable law)
restricting in any manner the use, transfer or licensing thereof by Company, or
which may affect the validity, use or enforceability of such Company
Intellectual Property.

          (b) Each material item of Company Registered Intellectual Property is
valid and subsisting, all necessary registration, maintenance and renewal fees
currently due in connection with such Registered Intellectual Property have been
made and all necessary documents, recordations and certificates in connection
with such Registered Intellectual Property have been filed with the relevant
patent, copyright, trademark or other authorities in the United States or
foreign jurisdictions, as the case may be, for the purposes of maintaining such
Registered Intellectual Property, except, in each
<PAGE>

case, as would not materially adversely affect such item of Company Registered
Intellectual Property.

          (c) Company or one of its subsidiaries owns and has good and exclusive
title to, or has license (sufficient for the conduct of its business as
currently conducted) to, each material item of Company Intellectual Property
free and clear of any Encumbrance (excluding licenses and related restrictions).
The Company Intellectual Property constitutes all the Intellectual Property
necessary to, or used or held for use in, the conduct of the business as
currently conducted.  The consummation of the transactions contemplated by this
Agreement will not alter, impair or extinguish any material Company Intellectual
Property.

          (d) Neither Company nor any of its subsidiaries has transferred
ownership of, or granted any exclusive license with respect to, any Intellectual
Property that is or was material Company Intellectual Property, to any third
party.

          (e) Part 3.9(e) of the Company Disclosure Letter contains a true and
complete list of  all in-bound OEM agreements and all distributor agreements to
which Company or any of its subsidiaries is a party.  None of Company or its
subsidiaries is a party to any contract with a term of greater than one year
with a long-distance telecommunications provider, Internet Service Provider,
service farm provider or computer hardware provider.

          (f) To Company's knowledge, the operation of the business of Company
and its Subsidiaries as such business currently is conducted, including the
design, development, marketing and sale of the products or services of Company
and its subsidiaries (including with respect to products currently under
development) has not and does not infringe or misappropriate the Intellectual
Property of any third party or, to its knowledge, constitute unfair competition
or trade practices under the laws of any jurisdiction.

          (g) None of Company or any of its subsidiaries has received written or
credible oral notice from any third party that the operation of the business of
Company and its subsidiaries or any act, product or service of Company and its
subsidiaries, infringes or misappropriates the Intellectual Property of any
third party or constitutes unfair competition or trade practices under the laws
of any jurisdiction.  There is no claim, action, suit, investigation or
proceeding pending against, or, to the knowledge of Company, threatened against
or affecting, Company, any of its subsidiaries, any present or former officer,
director or employee of Company or any of its subsidiaries (i) based upon, or
challenging or seeking to deny or restrict, the rights of the Company or any
subsidiary in any of the Company Intellectual Property, (ii) alleging that the
use of the Company Intellectual Property or any services provided, processes
used or products manufactured, used, imported or sold by Company or any
subsidiary do or may conflict with, misappropriate, infringe or otherwise
violate any Intellectual Property of any third party or (iii) alleging that
Company or any of its subsidiaries have infringed, misappropriated or otherwise
violated any Intellectual Property of any third party.

          (h) Except as set forth in Part 3.9(h) of the Company Disclosure
Letter, to Company's knowledge, no person has or is infringing or
misappropriating any Company Intellectual Property, which infringement or
misappropriation, individually or in the aggregate, would be material to
Company.
<PAGE>

          (i) Company and its subsidiaries have taken reasonable steps to
protect Company's and its subsidiaries' rights in Company's and such
subsidiaries' confidential information and trade secrets, except where the
failure to do so would not would reasonably be expected to have a Material
Adverse Effect on Company.

          (k) Except under license or service agreements with end users of
products of Company and its subsidiaries, none of Company and any of its
subsidiaries has given an indemnity in connection with any Intellectual Property
right to any person.

        (z)  Section 3.10 Compliance with Laws. (a) Neither Company nor any of
                          --------------------
its subsidiaries is in conflict with, or has violated or is 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 note, bond,
mortgage, indenture, 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 have a Material Adverse Effect
on Company. To Company's knowledge, 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 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 material business practice of Company or any of its subsidiaries, or any
acquisition of material property by Company or any of its subsidiaries.
          (b) Company and its subsidiaries hold all permits, licenses,
variances, exemptions, orders and approvals from governmental authorities
(including, without limitation all such permits required under environmental
laws) that are material to or required for the operation of the business of
Company as currently conducted (collectively, the "Company Permits"), and are in
compliance with the terms of Company Permits, except where the failure to hold
such Company Permits, or be in such compliance, would not, individually or in
the aggregate, would reasonably be expected to have a Material Adverse Effect on
Company.
          (c) No written notice, notification, demand, request for information,
citation, summons or order has been received, no complaint has been filed, no
penalty has been assessed, and no investigation, action, claim, suit, proceeding
or review is pending or, to the knowledge of the Company, is threatened by any
governmental entity or other Person relating to or arising out of any
environmental law.  There are no material liabilities of or relating to the
Company or any of its subsidiaries of any kind whatsoever, whether accrued,
contingent, absolute, determined, determinable or otherwise arising under or
relating to any environmental law and there are no facts, conditions, situations
or set of circumstances that could reasonably be expected to result in or be the
basis for any such material liability. For purposes of this Section, the terms
"Company" and "subsidiaries" shall include any entity that is, in whole or in
part, a predecessor of the Company or any of its subsidiaries.
<PAGE>

        (aa)  Section 3.11 Litigation. There are no claims, suits, actions,
                           ----------
investigations or proceedings (or any basis therefor) pending or, to the
knowledge of Company, threatened against, relating to or affecting Company, any
of its subsidiaries any officer, director or employee of Company or any of its
subsidiaries or any person for whom the Company or any subsidiary may be liable
or any of their respective properties, before any Governmental Entity or any
arbitrator that seeks to restrain or enjoin the consummation of the transactions
contemplated by this Agreement or which would reasonably be expected, either
singly or in the aggregate with all such claims, actions or proceedings, to have
a Material Adverse Effect on Company or have a material adverse effect on the
ability of the parties hereto to consummate the transactions contemplated
hereby. As of the date hereof, no director or executive officer of Company has
asserted a claim to seek indemnification from Company under Company Charter
Documents or any indemnification agreement between Company and such person.

        (bb)  Section 3.12 Employee Benefit Plans. (a) Definitions. For purposes
                           ----------------------
of this Agreement, the following terms shall have the meanings set forth below:
               (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;

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

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

               (iv)   "Employee" shall mean any current, former, or retired
          employee, officer, or director of Company or any subsidiary of
          Company;

               (v)    "Employee Agreement" shall mean each management,
          employment, severance, consulting, relocation, repatriation,
          expatriation, visas, work permit or similar agreement or contract
          between Company or any subsidiary of Company, on the one hand, and any
          Employee or consultant of Company or any subsidiary of Company, on the
          other hand;

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

               (vii)  "ERISA 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;
<PAGE>

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

               (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.  Part 3.12 of the Company Disclosure Letter contains an
              --------
accurate and complete list of each Company Employee Plan and each Employee
Agreement and, to the knowledge of Company, any other material benefit plan,
program, or arrangement in which an Employee is eligible to participate (each
plan other than a Company Employee Plan, an "Outsourced Plan").  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), or to enter into any
Company Employee Plan or Employee Agreement, nor does it have any intention or
commitment to do any of the foregoing.

          (c) Documents.  Company has made available to Parent:  (i) correct and
              ---------
complete copies of all documents embodying each Company Employee Plan and each
Employee Agreement including all amendments thereto and written interpretations
thereof; (ii) the most recent annual actuarial valuations, if any, prepared for
each Company Employee Plan; (iii) the most recent annual report (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; (iv) if Company Employee Plan is funded, the most recent
annual and periodic accounting of Company Employee Plan assets; (v) 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; (vi) the most recent IRS determination or opinion letter, and all
rulings relating to Company Employee Plans; (vii) 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; (viii) 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; and (ix) all registration statements and prospectuses prepared in
connection with each Company Employee Plan.  Additionally, the Company has
provided information with respect to the Outsourced Plans to the extent
reasonably practicable.
<PAGE>

          (d) Employee Plan Compliance. Except in each case, as would not,
              ------------------------
individually or in the aggregate, result in a material liability to Company or
as set forth on Part 3.12 of the Company Disclosure Letter: (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 has received an opinion, determination, advisory or notification letter
from the Internal Revenue Service that it is so qualified or has remaining a
period of time to obtain such a letter from the IRS, and no event has occurred
since the date of such determination that could reasonably be expected to result
in the revocation of, or materially adversely affect, such qualification; (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 (or any administrative class exemption issued thereunder), 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 (other than currently outstanding stock options) 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 expenses typically incurred in a termination event); (vi)
there are no audits, inquiries or proceedings pending or, to the knowledge of
Company, threatened by the IRS or DOL with respect to any Company Employee Plan;
(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; and (viii) all contributions due from Company or
any Affiliate with respect to any of Company Employee Plans have been made as
required under ERISA or have been accrued on the Company Balance Sheet.

          (e) Pension Plans. Neither Company nor any ERISA Affiliate of Company
              -------------
has 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, that would result in material liability to Company.

          (f) Multiemployer Plans.  At no time has Company or any ERISA
              -------------------
Affiliate of Company contributed to or been requested to contribute to any
Multiemployer Plan, that would result in material liability to Company.

          (g) No Post-Employment Obligations.  No Company Employee Plan
              ------------------------------
provides, or has any liability to provide, retiree health 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 health benefits, except to the extent required by statute.

          (h) Effect of Transaction.  The execution of this Agreement and the
              ---------------------
consummation of the transactions contemplated hereby will not (either alone or
upon the occurrence
<PAGE>

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 (other than full vesting as a result of partial or full
plan termination of a qualified plan), distribution, increase in benefits or
obligation to fund benefits with respect to any Employee. There is no contract,
plan or arrangement (written or otherwise) covering any Employee or former
Employee of Company that, individually or collectively, could give rise to the
payment of any amount that would not be deductible pursuant to the terms of
Section 280G or 162(m) of the Code.

          (i) Employment Matters.  Company and each of its subsidiaries 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.  There are no pending, or, to Company's knowledge,
threatened material 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 materially 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.

          (j)  Labor. Company does not know of any activities or proceedings of
               -----
any labor union to organize any Employees that would be material to Company.
There are no actions, suits, claims, labor disputes or grievances pending, or,
to the knowledge of Company, threatened relating to any labor, safety or
discrimination matters involving any Employee, including charges of unfair labor
practices or discrimination complaints, which would reasonably be expected to,
individually or in the aggregate, result in any material liability to Company.
Neither Company nor any of its subsidiaries has engaged in any unfair labor
practices within the meaning of the National Labor Relations Act which would
reasonably be expected to, individually or in the aggregate, result in any
material liability to Company. 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.

          (k) International Employee Plans. 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 material 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 in accordance with the terms of each such
International Employee Plan (other than expenses typically incurred in a
termination event).

3.13  Certain Agreements.  As of the date hereof, neither Company nor any of its
      ------------------
subsidiaries is a party to or is bound by: (a) any employment or consulting
agreement or commitment with any employee or member of Company's Board of
Directors, that, individually or in the aggregate, is material to Company, other
than those that are terminable by Company or any of
<PAGE>

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

          (b) any agreement or plan, including 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 material guaranty or any instrument evidencing indebtedness
for borrowed money by way of direct loan or sale of debt securities;

          (d) any material agreement, obligation or commitment containing
covenants purporting to limit or which effectively limit Company's or any of its
subsidiaries' freedom to compete in any line of business or in any geographic
area or which would so limit Company or the Surviving Corporation or any of its
subsidiaries after the Effective Time;

          (e) any agreement 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 or
participation interest in any corporation, partnership, joint venture, strategic
alliance or other business enterprise other than Company's subsidiaries; or

          (f) any agreement or commitment currently in force providing for
capital expenditures by Company or its subsidiaries in excess of $500,000.

The agreements required to be disclosed in the Company Disclosure Letter
          pursuant to clauses (a) through (f) above or pursuant to Section 3.9
          or are required to be filed with any Company SEC Report ("Company
          Contracts") are valid and in full force and effect, except to the
          extent that such invalidity would not be material to Company.  Neither
          Company nor any of its subsidiaries, nor to Company's knowledge, any
          other party thereto, 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, any of the terms
          or conditions of any Company Contract in such a manner as would be
          material to Company.

    (cc)   Section 3.14 Brokers' and Finders' Fees. Except for fees payable to
                        --------------------------
FleetBoston Robertson Stephens Inc. pursuant to an engagement letter that has
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.

    (dd)   Section 3.15  Insurance.   Company and each of its subsidiaries have
                         ---------
policies of insurance and bonds of the type and in amounts customarily carried
by persons conducting business or owning assets similar to those of Company and
its subsidiaries. There is no material claim pending under any of such policies
or bonds as to which coverage has been questioned, denied
<PAGE>

or disputed by the underwriters of such policies or bonds. All premiums due and
payable under all such policies have been paid and Company and its subsidiaries
are otherwise in compliance in all material respects with the terms of such
policies and bonds. To the knowledge of Company, there has been no threatened
termination of, or material premium increase with respect to, any of such
material policies.

     (ee)   Section 3.16  Disclosure.   Neither the Schedule 14D-9, nor any of
                          ----------
the information supplied or to be supplied by the Company or its subsidiaries or
representatives for inclusion or incorporation by reference in the Registration
Statement, the Post-Effective Amendment (as defined below) or the Offer
Documents will, at the respective times any such documents or any amendments or
supplements thereto are filed with the SEC, are first published, sent or given
to stockholders or become effective under the Securities Act, contain any untrue
statement of a material fact or omit to state any material fact required to be
stated therein or necessary to make the statements therein not misleading. The
Schedule 14D-9 will comply as to form in all material respects with the
requirements of all applicable laws, including the Exchange Act and the rules
and regulations thereunder. No representations or warranty is made by Company
with respect to statements made or incorporated by reference in any such
documents based on information supplied by Parent or Merger Sub specifically for
inclusion or incorporation by reference therein.

     (ff)   Section 3.17  Fairness Opinion.   Company's Board of Directors has
                          ----------------
received a true and correct copy of an opinion from FleetBoston Robertson
Stephens Inc., dated as of the date hereof, to the effect that, as of the date
hereof, the consideration to be received by Company's stockholders in the Offer
and the Merger is fair to Company's stockholders from a financial point of view.

     (gg)   Section 3.18  Affiliates. Part 3.18 of the Company Disclosure Letter
                          ----------
is a complete 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. Except as set forth in Company SEC
Reports, since the date of Company's last proxy statement filed with the SEC, to
the knowledge of Company, no event has occurred = as of the date of this
Agreement that would be required to be reported by Company pursuant to Item 404
of Regulation S-K promulgated by the SEC.

Article IV.
Representations and Warranties of Parent and Merger Sub
As of the date of this Agreement and as of the Closing Date, except as disclosed
in (i) Parent's Annual Report on Form 10-K for the year ending December 31, 1999
and any Parent SEC Reports (as defined below) filed subsequent to such Form 10-K
and prior to the date of this Agreement, or (ii) the disclosure letter delivered
by Parent to Company dated as of the date hereof and certified by a duly
authorized officer of Parent (the "Parent Disclosure Letter"), Parent and Merger
Sub represent and warrant as follows:

     (hh)  Section 4.1  Organization of Parent and Merger Sub. (a) Each of
Parent and Merger Sub is a corporation duly organized, validly existing and in
good standing under the laws of the jurisdiction of its incorporation and has
all requisite corporate power and authority, and all requisite qualifications to
do business as a foreign corporation, to conduct its business in the manner
<PAGE>

in which its business is currently being conducted, except where the failure to
have such qualifications would not, individually or in the aggregate, have a
Material Adverse Effect on Parent.
          (b) Parent has delivered or made available to Company a true and
correct copy of the Certificate of Incorporation and Bylaws of Parent and Merger
Sub, each as amended to date (collectively, the "Parent Charter Documents"), and
each such instrument is in full force and effect.  Neither Parent nor Merger Sub
is in violation of any of the provisions of the Parent Charter Documents.

     (ii)  Section 4.2  Parent and Merger Sub Capitalization. (a) The authorized
                        ------------------------------------
capital stock of Parent consists solely of 500,000,000 shares of Parent Common
Stock par value $.01 per share, of which there were 192,686,181 shares issued
and outstanding as of the close of business on April 30, 2000, and 10,000,000
shares of Preferred Stock, par value $0.01 per share, of which no shares are
issued or 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 Certificate of Incorporation or Bylaws
of Parent or any agreement or document to which Parent is a party or by which it
is bound.

          As of May 19, 2000, there were 16,151,407 shares of Parent Common
Stock authorized under the 1999 Equity Incentive Plan, of which 7,836,696 were
subject to outstanding options, 7,123,759 were issued pursuant to outstanding
options and 1,190,952 were available for future grants.

          As of May 19, 2000, there were 8,072,856 shares of Parent Common Stock
authorized under the 1999 Employee Stock Purchase Plan, of which 1,848,216 were
issued pursuant to outstanding options.

          As of May 19, 2000, there were 1,500,000 shares of Parent Common Stock
authorized under the 1999 Non-Employee Director Option Plan, of which 20,000
were subject to outstanding options and 1,480,000 were available for future
grants.

          As of May 19, 2000, there were no shares of Parent Common Stock
authorized for future grant under the 1995 Stock Option/ Stock Issuance Plan,
and there were 23,811,501 shares subject to outstanding options.

          As of May 19, 2000, there were 24,000,000 shares of Parent Common
Stock authorized under the 1999 Supplemental Stock Option Plan, of which
23,887,500 were subject to outstanding options.

          All shares of Parent 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.

          (b) The authorized capital stock of Merger Sub consists of 1,000
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.  All of the outstanding
shares of Merger Sub's common stock have been duly authorized and validly
issued, and are fully paid and nonassessable.  Merger Sub was formed for the
<PAGE>

purpose of consummating the Merger and has no material assets or liabilities
except as necessary for such purpose.

          (c) All outstanding shares of Parent Common Stock, all outstanding
Parent options, and all outstanding shares of capital stock of each subsidiary
of Parent have been issued and granted in compliance with (i) all applicable
securities laws and other applicable material Legal Requirements and (ii) all
material requirements set forth in applicable agreements or instruments.

          (d) The Parent Common Stock to be issued in the Offer and the Merger,
when issued in accordance with the provisions of this Agreement, will be validly
issued, fully paid and nonassessable.

     (jj)  Section 4.3  Obligations With Respect to Capital Stock.  Except as
                        -----------------------------------------
set forth in Section 4.2, there are no equity securities, partnership interests
or similar ownership interests of any class of Parent 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 Parent owns free and
clear of all claims and Encumbrances, directly or indirectly through one or more
subsidiaries, except for shares of capital stock or other similar ownership
interests of certain subsidiaries of Parent that are owned by certain nominee
equity holders as required by the applicable law of the jurisdiction of
organization of such subsidiaries and except with respect to the securities of
entities in which Parent holds, directly or indirectly, less than 20% of the
outstanding voting securities, 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 Parent, 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. 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 Parent or any of its subsidiaries is a party or by which it is bound
obligating Parent 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 Parent or any of its
subsidiaries or obligating Parent 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.

     (ll)  Section 4.4  Authority; Non-Contravention.  (a) Each of Parent and
                        ----------------------------
Merger Sub has all requisite corporate power and authority to enter into this
Agreement and to consummate the transactions contemplated hereby. 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 Parent and Merger Sub, subject only to the filing of the
Certificate of Merger pursuant to Delaware Law. No approval of any holder of any
securities of Parent is required in connection with the consummation of the
transactions contemplated hereby. 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 obligations
of
<PAGE>

Parent and Merger Sub, respectively, enforceable against Parent and Merger
Sub in accordance with its terms, except as enforceability may be limited by
bankruptcy and other similar laws affecting the rights of creditors generally
and general principles of equity.
          (b) The execution and delivery of this Agreement by each of Parent and
Merger Sub does not, and the performance of this Agreement by Parent and Merger
Sub will not, (i) conflict with or violate the Certificate of Incorporation or
Bylaws of Parent or Merger Sub, (ii) subject to compliance with the requirements
set forth in Section 4.4(c), 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 breach
of or constitute a default (or an event that with notice or lapse of time or
both would become a 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 an Encumbrance on any of the properties or assets of Parent or
Merger Sub pursuant to, any note, bond, mortgage, indenture, contract,
agreement, lease, license, permit, franchise, concession 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, except, in the
case of clauses (ii) and (iii), for such conflicts, violations, breaches,
defaults, impairments, or rights which, individually or in the aggregate, would
not have a Material Adverse Effect on Parent.  Part 4.4(b) of the Parent
Disclosure Letter list all consents, waivers and approvals under any of Parent'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 Parent or the Surviving
Corporation as a result of the Merger.

          (c) No consent, approval, order or authorization of, or registration,
declaration or filing with any Governmental Entity or other person 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 Offer or Merger,
except for (i) the filing of the Certificate of Merger with the Secretary of
State of the State of Delaware, (ii) compliance with any applicable requirements
of the Securities Act, the Exchange Act, and any other applicable securities
law, whether state or foreign, (iii) such filings as may be required under the
HSR Act and (iv) such other consents, authorizations, filings, approvals and
registrations which if not obtained or made would not be material to Parent or
the Surviving Corporation or have a material adverse effect on the ability of
the parties hereto to consummate the transactions contemplated hereby.

     (mm)  Section 4.5  SEC Filings; Parent Financial Statements. (a) Parent has
                        ----------------------------------------
filed all forms, reports and documents required to be filed by Parent with the
SEC since the effective date of the registration statement for Parent's initial
public offering, 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 all material respects 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
<PAGE>

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, except to
the extent corrected prior to the date of this Agreement by a subsequently filed
Parent SEC Report. None of Parent's subsidiaries is required to file any forms,
reports or other documents with the SEC.
          (b) Each of the consolidated financial statements of Parent
(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) comply as to form in all material
respects with the published rules and regulations of the SEC with respect
thereto, (ii) are 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 under Form 1O-Q, 8-K or any successor form under the Exchange Act)
and (iii) fairly present 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 March 31, 2000 is hereinafter
referred to as the "Parent Balance Sheet."  Except as disclosed in the Parent
Financials or in the Parent SEC Documents filed, in each case, prior to the date
hereof, neither Parent nor any of its subsidiaries has any material liabilities
or obligations (absolute, accrued, contingent or otherwise) which are,
individually or in the aggregate, material to the business, results of
operations or financial condition of Parent and its subsidiaries taken as a
whole, except for liabilities incurred since the date of the Parent Balance
Sheet in the ordinary course of business consistent with past practices and
liabilities incurred in connection with this Agreement.

          (c) Parent has heretofore furnished to Company 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 Parent with the SEC pursuant to
the Securities Act or the Exchange Act.

     (nn)  Section 4.6  Absence of Certain Changes or Events. Since the date of
                        ------------------------------------
the Parent Balance Sheet there has not been (i) any event, occurrence,
development or state of circumstances or facts that has had or would reasonably
be expected to have, individually or in the aggregate, a Material Adverse Effect
on Parent, (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
Parent's or any of its subsidiaries' capital stock, or any purchase, redemption
or other acquisition by Parent of any of Parent's capital stock or any other
securities of Parent or its subsidiaries or any options, warrants, calls or
rights to acquire any such shares or other securities except for repurchases
which are not, individually or in the aggregate, material in amount from
employees following their termination pursuant to the terms of their pre-
existing stock option or purchase agreements, (iii) any material change by
Parent in its accounting methods, principles or practices, except as required by
concurrent changes in GAAP or (iv) any revaluation by Parent of any of its
material assets, other than in the ordinary course of business.
<PAGE>

     (oo)  Section 4.7    Taxes. (a) Parent and each of its subsidiaries have
                          -----
timely filed all material Returns relating to Taxes required to be filed by or
on behalf of Parent and each of its subsidiaries with any Tax authority. Such
Returns are true, correct and complete in all material respects, and Parent and
each of its subsidiaries have paid all Taxes shown to be due on such Returns.
          (b) Parent and each of its subsidiaries have withheld with respect to
its employees all federal and state income Taxes, Taxes pursuant to FICA, Taxes
pursuant to FUTA and other Taxes required to be withheld, except such Taxes as
are not material to Parent.

          (c) Neither Parent nor any of its subsidiaries has been delinquent in
the payment of any material Tax, nor is there any material Tax deficiency
outstanding, proposed or assessed against Parent or any of its subsidiaries.
Parent and its subsidiaries have not executed any unexpired waiver of any
statute of limitations on or extending the period for the assessment or
collection of any Tax.

          (d) No audit or other examination of any Return of Parent or any of
its subsidiaries by any Tax authority is presently in progress, nor has Parent
or any of its subsidiaries been notified of any request for such an audit or
other examination that is reasonably likely to result in any adjustment that is
material to Parent.

          (e) No adjustment relating to any Returns filed by Parent 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
that is reasonably likely to be material to Parent.

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

          (g) Neither Parent 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 Parent.

          (h) Neither Parent nor any of its subsidiaries is party to or has any
obligation under any Tax-sharing, Tax indemnity or Tax allocation agreement or
arrangement.

          (i) Parent and its subsidiaries have not been and will not be required
to include any adjustment in taxable income for any Tax period (or portion
thereof) pursuant to Section 481 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.

          (j) None of Parent's or its subsidiaries' assets are tax exempt use
property within the meaning of Section 168(h) of the Code.
<PAGE>

          (k) Parent has not been distributed in a transaction qualifying under
Section 355 of the Code within the last two years, nor has Parent distributed
any corporation in a transaction qualifying under Section 355 of the Code within
the last two years.

          (l) Parent is not aware of any fact, circumstance, plan or intention
on the part of Parent that would be reasonably likely to prevent the Transaction
from qualifying as a "reorganization" within the meaning of Section 368(a) of
the Code.

     (pp)  Section 4.8  Title to Properties. Parent 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 Encumbrances, except as
reflected in the Parent Financials and except for liens for Taxes not yet due
and payable and such Encumbrances which are not material to Parent.

     (qq)  Section 4.9  Intellectual Property.  For the purposes of this
                        ---------------------
Agreement, the following terms have the following definitions:

          "Parent Intellectual Property" shall mean any Intellectual Property
that is owned by, or exclusively licensed to, Parent or one of its subsidiaries.

          "Parent Registered Intellectual Property" means all of the Registered
Intellectual Property owned by, or filed in the name of, Parent or one of its
subsidiaries.

          (a)  No material Parent Intellectual Property or product or service of
Parent is subject to any proceeding or outstanding decree, order, judgment,
agreement or stipulation restricting in any manner the use, transfer or
licensing thereof by Parent, or which may affect the validity, use or
enforceability of such Parent Intellectual Property.

          (b)  Each material item of Parent Registered Intellectual Property is
valid and subsisting, all necessary registration, maintenance and renewal fees
currently due in connection with such Registered Intellectual Property have been
made and all necessary documents, recordations and certificates in connection
with such Registered Intellectual Property have been filed with the relevant
patent, copyright, trademark or other authorities in the United States or
foreign jurisdictions, as the case may be, for the purposes of maintaining such
Registered Intellectual Property except, in each case, as would not materially
adversely affect such item of Parent Registered Intellectual Property.

          (c)  Parent or one of its subsidiaries owns and has good and exclusive
title to, or has license (sufficient for the conduct of its business as
currently conducted and as proposed to be conducted) to, each material item of
Parent Intellectual Property free and clear of any Encumbrance (excluding
licenses and related restrictions).  To the knowledge of Parent, Parent or one
of its subsidiaries owns, or holds a valid license to, free and clear of all
Encumbrances, all material Intellectual Property necessary to, or used or held
for use in, the conduct of the business as currently conducted and as proposed
to be conducted by Parent and its subsidiaries.
<PAGE>

          (d)  Neither Parent nor any of its subsidiaries has transferred
ownership of, or granted any license with respect to, any Intellectual Property
that is or was material Parent Intellectual Property, to any third party.

          (e)  To Parent's knowledge, the operation of the business of Parent
and its subsidiaries as such business currently is conducted, including the
design, development, marketing and sale of the products or services of Parent
and its subsidiaries (including with respect to products currently under
development) has not, does not and will not infringe or misappropriate the
Intellectual Property of any third party or, to its knowledge, constitute unfair
competition or trade practices under the laws of any jurisdiction.

          (f)  Except as set forth in Part 4.9(f) of the Parent Disclosure
Letter, no person has or is infringing or misappropriating any Parent
Intellectual Property, which infringement or misappropriation, individually or
in the aggregate, would be material to Parent.

          (g)  Parent and its subsidiaries have taken reasonable steps to
protect Parent's and its subsidiaries' rights in Parent's and such subsidiaries'
confidential information and trade secrets, except where the failure to do so
would not reasonably be expected to have a Material Adverse Effect on Parent.

     (rr)  Section 4.10  Compliance with Laws.  (a) Neither Parent nor any of
                         --------------------
its subsidiaries is in conflict with, or has violated or is in violation of (i)
any law, rule, regulation, order, judgment or decree applicable to Parent or any
of its subsidiaries or by which Parent or any of its subsidiaries or any of
their respective properties is bound or affected, or (ii) any note, bond,
mortgage, indenture, agreement, lease, license, permit, franchise or other
instrument or obligation to which Parent or any of its subsidiaries is a party
or by which Parent 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 have a Material Adverse Effect
on Parent. No investigation or review by any Governmental Entity is pending or,
to Parent's knowledge, has been threatened in a writing delivered to Parent
against Parent or any of its subsidiaries, nor, to Parent's knowledge, has any
Governmental Entity indicated an intention to conduct an investigation of Parent
or any of its subsidiaries. There is no judgment, injunction, order or decree
binding upon Parent or any of its subsidiaries which has or could reasonably be
expected to have the effect of prohibiting or materially impairing any material
business practice of Parent or any of its subsidiaries, or any acquisition of
material property by Parent or any of its subsidiaries.
     (b) Parent and its subsidiaries hold all permits, licenses, variances,
exemptions, orders and approvals from governmental authorities that are material
to or required for the operation of the business of Parent as currently
conducted (collectively, the "Parent Permits"), and are in compliance with the
terms of the Parent Permits, except where the failure to hold such Parent
Permits, or be in such compliance, would not, individually or in the aggregate,
reasonably be expected to have a Material Adverse Effect on Parent.

     (ss)  Section 4.11  Litigation.  There are no claims, suits, actions or
                         ----------
proceedings pending or, to the knowledge of Parent, threatened against, relating
to or affecting Parent or any of
<PAGE>

its subsidiaries, before any Governmental Entity or any arbitrator that seeks to
restrain or enjoin the consummation of the transactions contemplated by this
Agreement or which would reasonably be expected, either singly or in the
aggregate with all such claims, actions or proceedings, to have a Material
Adverse Effect on Parent or have a material adverse effect on the ability of the
parties hereto to consummate the transactions contemplated hereby. No director
or executive officer of the Parent has asserted a claim to seek indemnification
from the Parent under Parent Charter Documents or any indemnification agreements
between Parent and such person.

     (tt)  Section 4.12  Brokers' and Finders' Fees.  Except for fees payable to
                         --------------------------
Morgan Stanley Dean Witter, Parent 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.

     (uu)  Section 4.13  Disclosure Documents.  Neither the Offer Documents or
                         --------------------
the Registration Statement or the Post-Effective Amendment, nor any of the
information supplied or to be supplied by Parent or its subsidiaries or
representatives for inclusion or incorporation by reference in the Schedule 14D-
9 or the Company Proxy Statement will, at the respective times any such
documents or any amendments or supplements thereto are filed with the SEC, are
first published, sent or given to stockholders or become effective under the
Securities Act or, in the case of the Company Proxy Statement, 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 to make the statements therein not misleading. The Offer Documents and
the Registration Statement and the Post-Effective Amendment will comply as to
form in all material respects with the requirements of all applicable laws,
including the Securities Act and the Exchange Act, as applicable, and the rules
and regulations thereunder. No representation or warranty is made by Parent or
Merger Sub with respect to statements made or incorporated by reference therein
based on information supplied by Company for inclusion or incorporation by
reference therein.

     (vv)  Section 4.14  Affiliates.  Except as set forth in Parent SEC Reports,
                         ----------
since the date of Parent's last proxy statement filed with the SEC, to the
knowledge of Parent, no event has occurred as of the date of this Agreement that
would be required to be reported by Parent pursuant to Item 404 of Regulation S-
K promulgated by the SEC.

Article V.
Conduct Prior To The Effective Time

     (ww)  Section 5.1  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 Appointment Time, Company and
each of its subsidiaries shall, except to the extent that Parent shall otherwise
consent in writing and except as provided in Part 5.1 of Parent Disclosure
Letter, carry on its business in the ordinary course and in compliance in all
material respects 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 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, licensors, licensees and others
with which it has business dealings. In
<PAGE>

addition, during that period Company will promptly notify Parent of any material
event involving its business or operations consistent with the agreements
contained herein.
In addition, except as permitted by the terms of this Agreement, and except as
contemplated by this Agreement or provided in Schedule 5.1 of the Company
Disclosure Letter, 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 Appointment 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, 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 in effect, or policies existing, on the
date hereof (or as required by applicable law) and as previously disclosed in
writing 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 any material Company
Intellectual Property, 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 of Company or split, combine or reclassify any capital
stock of Company or issue or authorize the issuance of any other securities in
respect of, in lieu of or in substitution for any capital stock of Company;

          (e)  Purchase, redeem or otherwise acquire, directly or indirectly,
any shares of capital stock of Company or its subsidiaries, except repurchases
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 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 Company Options, (ii) shares of Company Common Stock issuable to
participants in the Company ESPP, (iii) shares of Company Common Stock issuable
to participants in Company's 401(k) Plan, in the case of (i), (ii) and (iii),
consistent with the terms thereof, and (iv) pursuant to grants of Company
Options to newly hired employees in the ordinary course of business, consistent
with past practice, and not to exceed in the aggregate pursuant to this clause
(iv) 400,000 shares of Company Common Stock;

          (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);
<PAGE>

          (h)  Acquire or agree to acquire by merging or consolidating with, or,
except as required by agreements listed in Part 3.1 of the Disclosure Schedule,
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
relationships 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;

          (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 economic effect of any of the
foregoing, other than in the ordinary course of business, consistent with past
practice;

          (k)  Except as required to comply with any Legal Requirement or as set
forth in Part 3.12 of the Company Disclosure Letter, 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, 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
with respect to employees and consultants (other than officers) in the ordinary
course of business, consistent with past practice, or change in any material
respect any management policies or procedures that are material to the business
of Company;

          (1)  Make any material capital expenditures, except in accordance with
the current Company annual budget and plan, as previously disclosed to Parent;

          (m)  Modify, amend or terminate any Company Contract to which Company
or any subsidiary thereof is a party or waive, release or assign any material
rights or claims thereunder other than in the ordinary course of business
consistent with past practice;

          (n)  Enter into any licensing or other agreement with regard to the
acquisition, distribution or licensing of any material Intellectual Property
other than licenses, distribution or other similar agreements entered into in
the ordinary course of business consistent with past practice;

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

          (p)  Materially change the pricing of the license fees Company charges
for licensing its software;

          (q)  Take any action that would materially delay the consummation of
the transactions contemplated hereby; or
<PAGE>

          (r)  Agree in writing or otherwise to take any of the actions
described in Section 5.1 (a) through (q) above.

     (xx)  Section 5.2  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, Parent and each
of its subsidiaries shall, except to the extent that Company shall otherwise
consent in writing and except as provided in Part 5.2 of the Parent Disclosure
Letter, carry on its business in the usual, regular and ordinary course, in
substantially the same manner as heretofore conducted and in compliance in all
material respects 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, licensors, licensees and others with which it has business dealings;
provided, however, that nothing in this Section 5.2 shall prevent Parent or any
of its subsidiaries from reviewing and pursuing any acquisition opportunities.

          In addition, except as permitted by the terms of this Agreement, and
except as contemplated by this Agreement or provided in Part 5.2 of the Parent
Disclosure Letter, without the prior written consent of 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,
Parent shall not do any of the following and shall not permit its subsidiaries
to 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 of Parent; provided that Parent shall not be prohibited
under this clause (a) from effecting any stock split, reverse stock split, stock
dividend, reorganization, recapitalization, reclassification or other like
change with respect to Parent Common Stock on or after the date hereof;

          (b)  Purchase, redeem or otherwise acquire, directly or indirectly,
any shares of capital stock of Parent or its subsidiaries, except repurchases 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;

          (c)  Cause, permit or propose any amendments to its Certificate of
Incorporation, Bylaws or other charter documents;

          (d)  Except as required by GAAP, make any change in accounting
methods, principles or practices or any change in tax accounting methods or any
tax elections;

          (e)  Take any action that would materially delay the consummation of
the transactions contemplated hereby; or

          (f)  Agree in writing or otherwise to take any of the actions
described in Section 5.2 (a) through (e) above.
<PAGE>

Article VI.
Additional Agreements

     (yy)  Section 6.1  Stockholder Approval; Preparation of Registration
                        -------------------------------------------------
Statement and Proxy Statement/Prospectus. (a) If approval of Company's
- ----------------------------------------
stockholders is required by applicable law in order to consummate the Merger
other than pursuant to Section 253 of Delaware Law, following the acceptance for
exchange of Shares pursuant to the Offer, Parent and Company shall, as soon as
practicable following the acceptance of Shares pursuant to the Offer, prepare
and Company shall file with the SEC the Company Proxy Statement and Parent and
Company shall prepare and Parent shall file with the SEC a post-effective
amendment to the Registration Statement (the "Post-Effective Amendment") for the
offer and sale of the Parent Stock pursuant to the Merger and in which the
Company Proxy Statement will be included as a prospectus. Each of Company and
Parent shall use all reasonable efforts to have the Post-Effective Amendment
declared effective under the Securities Act as promptly as practicable after
such filing. Company will use all reasonable efforts to cause the Company Proxy
Statement to be mailed to Company's stockholders as promptly as practicable
after the Post-Effective Amendment is declared effective under the Securities
Act. Parent shall also take any action (other than qualifying to do business in
any jurisdiction in which it is not now so qualified or to file a general
consent to service of process) required to be taken under any applicable state
securities laws in connection with the issuance of Parent Common Stock in the
Offer and the Merger and Company shall furnish all information concerning
Company and the holders of capital stock of Company as may be reasonably
requested in connection with any such action and the preparation, filing and
distribution of the Company Proxy Statement. No filing of, or amendment or
supplement to, or correspondence to the SEC or its staff with respect to, the
Post-Effective Amendment will be made by Parent, or the Company Proxy Statement
will be made by Company, without providing the other party a reasonable
opportunity to review and comment thereon. Parent will advise Company, promptly
after it receives notice thereof, of the time when the Post-Effective Amendment
has become effective or any supplement or amendment has been filed, the issuance
of any stop order, the suspension of the qualification of the Parent Common
Stock issuable in connection with the Merger for offering or sale in any
jurisdiction, or any request by the SEC for amendment of the Post-Effective
Amendment or comments thereon and responses thereto or requests by the SEC for
additional information. Company will advise Parent, promptly after it receives
notice thereof, of any request by the SEC for the amendment of the Company Proxy
Statement or comments thereon and responses thereto or requests by the SEC for
additional information. If at any time prior to the Effective Time any
information relating to Company or Parent, or any of their respective
affiliates, officers or directors, should be discovered by Company or Parent
which should be set forth in an amendment or supplement to either of the Post-
Effective Amendment or the Company Proxy Statement, so that any of such
documents would not include any misstatement of a material fact or omit to state
any material fact necessary to make the statements therein, in light of the
circumstances under which they were made, not misleading, the party which
discovers such information shall promptly notify the other parties hereto and an
appropriate amendment or supplement describing such information shall be
promptly filed with the SEC and, to the extent required by law, disseminated to
the stockholders of Company.
          (b)  If approval of the Company's stockholders is required by
applicable law in order to consummate the Merger, Company shall establish, prior
to or as soon as practicable following the date upon which the Post-Effective
<PAGE>

Amendment becomes effective, a record date (which shall be prior to or as soon
as practicable following the date upon which the Post-Effective Amendment
becomes effective) for, duly call, give notice of, convene and hold a meeting of
its stockholders (the "Company Stockholders Meeting") for the purpose of
considering and taking action upon this Agreement and the Merger and (with the
consent of Parent) such other matters as may in the reasonable judgment of
Company be appropriate for consideration at the Company Stockholders Meeting.
Once the Company Stockholders Meeting has been called and noticed, Company shall
not postpone or adjourn the Company Stockholders Meeting (other than for the
absence of a quorum) without the consent of Parent. Subject to Company's right,
pursuant to Section 6.3(b) hereof, to withdraw or modify the Recommendations,
the Board of Directors of Company shall include in the Post-Effective Amendment
and the Company Proxy Statement a copy of the Recommendations as such
Recommendations pertain to the Merger and this Agreement. Notwithstanding the
foregoing, if approval of the Company's stockholders is required by applicable
law in order to consummate the Merger, the Board of Directors of Company shall
submit this Agreement and the Merger for approval to the Company's stockholders
whether or not the Board of Directors of Company determines in accordance with
Section 6.3(b) after the date hereof that this Agreement and the Merger are no
longer advisable and recommends that the stockholders of Company reject it.
Unless the Board of Directors of Company has withdrawn its recommendation of
this Agreement and the Merger in compliance with Section 6.3(b), Company shall
use its reasonable best efforts to solicit from stockholders of Company proxies
in favor of this Agreement and the Merger and shall take all other actions
necessary or advisable to secure the vote or consent of stockholders required by
Delaware Law to effect the Merger.

          (c)  Notwithstanding the foregoing clauses (a) and (b) above, if
Merger Sub shall acquire at least 90% of the outstanding Shares in the Offer,
the parties hereto shall take all necessary actions (including actions referred
to in clause (a) above, as applicable) to cause the Merger to become effective,
as soon as practicable after the expiration of the Offer, without a meeting of
stockholders of Company, in accordance with Section 253 of Delaware Law.

     (zz)  Section 6.2  Antitrust Filings.  (a) Promptly after the date of this
                        -----------------
Agreement, each of Company and Parent will prepare and file (i) with the United
States Federal Trade Commission and the Antitrust Division of the United States
Department of Justice 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 (the
"Antitrust Filings") and (ii) any other filings required to be filed by it under
the Exchange Act, the Securities Act or any other federal, state or foreign laws
relating to the Merger and the transactions contemplated by this Agreement (the
"Other Filings"). Company and Parent each shall promptly supply the other with
any information which may be required in order to effectuate any filings
pursuant to this Section 6.2.
          (b)  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 in connection with any filing made pursuant hereto and of any request
by the SEC or its staff or any other government officials for amendments or
supplements to the Registration Statement, the Post-Effective Amendment, the
Company Proxy Statement or any Antitrust Filings or Other Filings 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 Post-Effective
<PAGE>

Amendment, the Company Proxy Statement, the Merger or any Antitrust Filing or
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
Section 6.1 and this Section 6.2 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 the Registration Statement, the Post-Effective
Amendment, the Company Proxy Statement or any Antitrust Filing or 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 and/or Parent,
such amendment or supplement.

     (aaa)  Section 6.3  No Solicitation.  (a) From the date hereof until the
                         ---------------
Appointment Date or termination of the Agreement in accordance with Article VIII
hereof, whichever is earlier, neither Company nor any of its subsidiaries shall,
nor shall Company or any of its subsidiaries authorize or permit any of its or
their officers, directors, employees, investment bankers, attorneys,
accountants, consultants or other agents or advisors to, directly or indirectly,
(i) solicit, initiate or knowingly take any action to facilitate or encourage
the submission or announcement of any Acquisition Proposal (as defined below),
(ii) enter into or participate in any discussions or negotiations with, furnish
any information relating to Company or any of its subsidiaries or afford access
to the business, properties, assets, books or records of Company or any of its
subsidiaries to, otherwise cooperate in any way with, or knowingly assist,
participate in, facilitate or encourage any effort by any third party that has
made an Acquisition Proposal, (iii) approve, endorse or recommend any
Acquisition Proposal or (iv) enter into any letter of intent or similar document
or any contract, agreement or commitment contemplating or otherwise relating to
any Acquisition Proposal.
          (b)  Notwithstanding the foregoing, the Board of Directors of Company,
directly or indirectly through advisors, agents or other intermediaries, may (i)
engage in negotiations or discussions with any third party that, subject to
Company's compliance with Section 6.3(a), has made (and not withdrawn) a bona
fide Acquisition Proposal that the Board of Directors of Company reasonably
determines (after consultation with Company's financial advisor) constitutes a
Superior Proposal, (ii) furnish to such third party nonpublic information
relating to Company or any of its subsidiaries pursuant to a confidentiality
agreement with terms no less favorable to Company than those contained in the
Confidentiality Agreement, (iii) take and disclose to its stockholders a
position contemplated by Rule 14e-2(a) under the Exchange Act or otherwise make
disclosure to them, (iv) following receipt of such an Acquisition Proposal,
withdraw, modify in a manner adverse to Parent, or fail to make its
Recommendations, and/or (v) take any action ordered to be taken by Company by
any court of competent jurisdiction if, in each case (1) neither Company nor any
representative of Company and its subsidiaries shall have violated any of the
restrictions set forth in this Section 6.3, (2) the Board of Directors of
Company determines in good faith, after consultation with its outside legal
counsel, that it is necessary for the Board of Directors to take such action in
order to satisfy its fiduciary obligations to Company's stockholders under
applicable law, (3) prior to furnishing any such nonpublic information to, or
entering into any such discussions with, such person or group, Company gives
Parent written notice of the identity of such person or group and all of the
material terms and conditions of such Acquisition Proposal and of Company's
intention to furnish nonpublic information to, or enter into discussions with,
such person or group, and Company receives from such person or group an executed
confidentiality agreement containing terms at least
<PAGE>

as restrictive with regard to Company's confidential information as the
Confidentiality Agreement, (4) gives Parent prompt advance notice of its intent
to furnish such nonpublic information or enter into such discussions (which
notice shall in no event be given less than one business day prior to furnishing
such information or entering into such discussions), and (5) contemporaneously
with furnishing any such nonpublic information to such person or group, Company
furnishes such nonpublic information to Parent (to the extent such nonpublic
information has not been previously furnished by the Company to Parent). 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 violation of the restrictions set forth in the preceding two sentences
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 shall be deemed to be a breach of this Section 6.3 by
Company.

          (c)  In addition to the obligations of Company set forth in paragraph
(a) of this Section 6.3, Company as promptly as reasonably practicable shall
advise Parent orally and in writing 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 Acquisition
Proposal or inquiry, and the identity of the person or group making any such
Acquisition Proposal or inquiry.  Company will keep Parent informed as promptly
as reasonably practicable in all material respects of material amendments of any
such Acquisition Proposal or inquiry.

"Superior Proposal" means any bona fide, unsolicited written Acquisition
Proposal for at least a majority of the outstanding shares of Company Common
Stock on terms that the Board of Directors of Company determines in good faith
by a majority vote, after consultation with its financial advisor of nationally
recognized reputation and taking into account all the terms and conditions of
the Acquisition Proposal, are more favorable to the Company's stockholders than
as provided hereunder. For purposes of this Agreement, "Acquisition Proposal"
shall mean any offer or proposal by a third party, other than Parent, Merger Sub
or any affiliate thereof, relating to: (A) any acquisition or purchase from
Company by any person or "group" (as defined under Section 13(d) of the Exchange
Act and the rules and regulations thereunder) of more than a 25% interest in the
outstanding 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 25% or more of the outstanding
voting securities of Company or any of its subsidiaries or any merger,
consolidation, business combination or similar transaction involving Company
pursuant to which the stockholders of Company immediately preceding such
transaction would hold less than 75% of the equity interests in the surviving or
resulting entity of such transaction; (B) any sale, lease (other than in the
ordinary course of business), exchange, transfer, license (other than in the
ordinary course of business), acquisition, or disposition of more than 25% of
the consolidated assets of Company; or (C) any liquidation or dissolution of
Company.

     (bbb)  Section 6.4  Obligations of Merger Sub.  Parent will take all action
                         -------------------------
necessary to cause Merger Sub to perform its obligations under this Agreement
and to consummate the Offer and the Merger on the terms and subject to the
conditions set forth in this Agreement.
<PAGE>

     (ccc)  Section 6.5  Voting of Shares.  Parent and Merger Sub agree to vote
                         ----------------
all Shares acquired in the Offer or otherwise beneficially owned by them or any
of their subsidiaries in favor of approval and adoption of this Agreement and
the Merger at the Company Stockholder Meeting or pursuant to Section 253 of the
DGCL, on the terms and subject to the conditions set forth in this Agreement.

     (ddd)  Section 6.6  Registration Statement.  Parent shall promptly prepare
                         ----------------------
and file with the SEC under the Securities Act the Registration Statement and
shall use all reasonable efforts to cause the Registration Statement to be
declared effective by the SEC as promptly as practicable. Parent shall promptly
take any action required to be taken under foreign or state securities laws in
connection with the issuance of Parent Common Stock in the Merger. Parent shall
include as an exhibit to the Registration Statement a tax opinion of Davis Polk
& Wardwell, in form and substance reasonably satisfactory to Parent and to
Company, on the basis of customary facts, representations and assumptions set
forth in such opinion (including without limitation assumptions that (i) the
minimum Condition shall be satisfied, and (ii) the Merger shall be completed
promptly following the Offer), to the effect that the Transaction will be
treated for federal income tax purposes as a reorganization within the meaning
of Section 368(a) of the Code.

     (eee)  Section 6.7  Confidentiality; Access to Information.  (a) The
                         --------------------------------------
parties acknowledge that Company and Parent have previously executed the
Confidentiality Agreement which Confidentiality Agreement will continue in full
force and effect in accordance with its terms.
          (b)  Company will afford Parent and its accountants, counsel and other
representatives reasonable access during normal business hours to the
properties, books, records and personnel of Company 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 operations and
personnel of Company, as Parent may reasonably request, including without
limitation copies of working papers of accountants, contracts, and other
corporate documents, and access to other parties with whom it has business
dealings.  Parent will afford Company and its accountants, counsel and other
representatives reasonable access during normal business hours to the
properties, books, records and personnel of Parent 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 operations and
personnel of Parent, as Company may reasonably request, including without
limitation copies of working papers of accountants, contracts, and other
corporate documents, and access to other parties with whom it has business
dealings.  No information or knowledge obtained in any investigation pursuant to
this Section 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 Offer and the Merger.

     (fff)  Section 6.8  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 Offer,
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,
except as may be required by law or any listing agreement with a national
securities exchange; provided, however, that this Section 6.8 shall terminate
in the event the Board of Directors of Company shall
<PAGE>

withdraw its Recommendations. The parties have agreed to the text of the joint
press release announcing the signing of this Agreement .

     (ggg)  Section 6.9  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 Annex I and Article VII
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 carry out fully the purposes of, this Agreement. Notwithstanding anything
in this Agreement to the contrary, neither Parent nor any of its affiliates
shall be under any obligation to make proposals, execute or carry out agreements
or submit to orders providing for the sale or other disposition or holding
separate (through the establishment of a trust or otherwise) of any assets or
categories of assets of Parent, any of its affiliates or Company or its
subsidiaries or the holding separate of the shares of Company Common Stock (or
shares of stock of the Surviving Corporation) or imposing or seeking to impose
any limitation on the ability of Parent or any of its subsidiaries or affiliates
to conduct their business or own such assets or to acquire, hold or exercise
full rights of ownership of the shares of Company Common Stock (or shares of
stock of the Surviving Corporation).
          (b)   Each of Company and Parent will give prompt notice to the other
of (i) any notice or other communication from any person alleging that the
consent of such person is or may be required in connection with the transactions
contemplated hereby, (ii) any notice or other communication from any
Governmental Entity in connection with the transactions contemplated hereby,
(iii) any litigation relating to, involving or otherwise affecting Company,
Parent or their respective subsidiaries that relates to the consummation of the
transactions contemplated hereby. 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 Annex I or Article VII 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. 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,
<PAGE>

such that the conditions set forth in Annex I or Article VII 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.

     (hhh)  Section 6.10  Stock Options and ESPP.  (a) At the Effective Time,
                          ----------------------
each outstanding Company Option and each outstanding warrant to purchase Company
Common Stock, whether or not then exercisable, will be assumed by Parent. Each
Company Option so assumed by Parent under this Agreement will continue to have,
and be subject to, the same terms and conditions set forth in the Company Stock
Option Plan immediately prior to the Effective Time (including, without
limitation, any repurchase rights or vesting provisions), except that, subject
to Section 6.10(b), (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 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 Option will be equal to the quotient determined by dividing
the exercise price per share of Company Common Stock at which such Company
Option was exercisable immediately prior to the Effective Time by the Exchange
Ratio, rounded up to the nearest whole cent. Continuous employment with Company
or its subsidiaries shall be credited to the optionee for purposes of
determining the vesting of all assumed Company Options after the Effective Time.
          (b)  It is intended that Company 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 Options qualified as incentive
stock options immediately prior to the Effective Time and the provisions of this
Section 6.10 shall be applied consistent with such intent in accordance with
Section 424 of the Code.

          (c)  At the Effective Time, the Company ESPP shall be assumed by
Parent; provided however, that no new offering period shall commence under the
Company ESPP and no employee of Company or any of its subsidiaries not
participating in the Company ESPP as of the date hereof shall become a
participant in the Company ESPP after such date.

     (iii)  Section 6.11  Form S-8.  Parent agrees to use its reasonable efforts
                          --------
to file a registration statement on Form S-8 for the shares of Parent Common
Stock issuable with respect to assumed Company Options as soon as is reasonably
practicable (and in any event within 10 days) after the Effective Time and shall
maintain the effectiveness of such registration statement thereafter for so long
as any of such options or other rights remain outstanding.

     (jjj)  Section 6.12  Indemnification.  (a) From and after the Effective
                          ---------------
Time, Parent shall, and shall 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 or the Surviving Corporation's Certificate of Incorporation or Bylaws
as in effect on the date hereof. The Certificate of Incorporation and Bylaws of
the Surviving Corporation will
<PAGE>

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.
          (b)  In the event that Parent or any of its successors or assigns (i)
consolidates with or merges into any other person and shall not be the
continuing or surviving corporation or entity of such consolidation or merger,
or (ii) transfers all or substantially all of its properties and assets to any
person in a single transaction or a series of transactions, then, and in each
such case, Parent shall make or cause to be made proper provision so that the
successors and assigns of Parent assume the indemnification obligations of
Parent under this Section 6.12 for the benefit of the Indemnified Parties.

          (c)  For a period of six years after the Effective Time, Parent will
either (i) cause the Surviving Corporation 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 in excess of 150% of the annual
premium currently paid by Company for such coverage (or such coverage as is
available for such 150% of such annual premium), or (ii) if mutually agreed
between Company and Parent, purchase a directors' and officers' liability
insurance on terms comparable to those applicable to the current directors and
officers of Company covering all periods prior to the Effective Time.

          (c)  This Section 6.12 shall survive the consummation of the Merger,
is intended to benefit Company, the Surviving Corporation and each Indemnified
Party, shall be binding on all successors and assigns of the Surviving
Corporation and Parent, and shall be enforceable by the Indemnified Parties.

     (kkk)  Section 6.13  Nasdaq Listing.  Parent agrees to authorize for
                          --------------
listing on NASDAQ National Market System the shares of Parent Common Stock
issuable, and those required to be reserved for issuance, in connection with the
Offer and the Merger, effective upon official notice of issuance.

     (lll) Section 6.14  Letters of Accountants.   Company and Parent shall use
                         ----------------------
their respective reasonable efforts to cause to be delivered to Parent letters
of Company's and Parent's independent accountants, respectively, dated no more
than two business days before the date on which the Registration Statement
becomes effective (and satisfactory in form and substance to Parent), that is
customary in scope and substance for letters delivered by independent public
accountants in connection with registration statements similar to the
Registration Statement.

     (mmm)  Section 6.15  Takeover Statutes.  If any Takeover Statute is or may
                          -----------------
become applicable to the Merger or the other transactions contemplated by this
Agreement, each of Parent
<PAGE>

and Company and their respective Boards of Directors shall grant such approvals
and take such lawful actions as are necessary to ensure that such transactions
may be consummated as promptly as practicable on the terms contemplated by this
Agreement and otherwise act to eliminate or minimize the effects of such statute
and any regulations promulgated thereunder on such transactions. Company agrees
that on and after the date hereof, it will not adopt any "poison pill" rights
plan or any similar antitakeover plan or take any other action that would impede
or prevent completion of the Offer, the Merger or this Agreement.

     (nnn)  Section 6.16  Certain Employee Benefits.  Employees of Company and
                          -------------------------
its subsidiaries will be granted credit for purposes of eligibility, vesting and
vacation accrual for all service with Company and its subsidiaries under each
employee benefit plan, program or arrangement of Parent or its Affiliates in
which such Employees are eligible to participate. If Employees become eligible
to participate in a welfare plan maintained or contributed to by Parent or its
Affiliates, Parent will cause such plan to (i) waive any preexisting condition
exclusions and waiting period limitations for conditions covered under the
applicable welfare plan under which Company employees participate (but only to
the extent corresponding exclusions and limitations were satisfied by such
Employees under the applicable welfare plans maintained or contributed to by
Company); and (ii) credit any deductible or out of pocket expenses or offsets
(or similar expenses) incurred by the Employees and their beneficiaries under
such plans during the portion of the calendar year prior to such participation.

     (ppp)  Section 6.17  Tax Matters.  Each of Parent, Merger Sub and Company
                          -----------
agrees that it will not take any action, or fail to take any action, which
action or failure to act would be reasonably likely to cause the Transaction to
fail to qualify as a "reorganization" within the meaning of Section 368(a) of
the Code. Each of Parent, Merger Sub and Company agrees to use its reasonable
efforts to make representations to Davis Polk & Wardwell and Wilson Sonsini
Goodrich & Rosati in support of their tax opinions in Section 6.6 and in Annex
I.

     (qqq)  Section 6.18  Employment Agreement.  Company agrees to cooperate
                          --------------------
with Parent in its efforts to negotiate employment or other agreements with key
employees identified by Parent between the date hereof and the Effective Time.

Article VII.
Conditions To The Merger

     (rrr)  Section 7.1  Conditions to Obligations of Each Party to Effect the
                         -----------------------------------------------------
Merger. The obligations of Company, Parent and Merger Sub to consummate the
- ------
Merger are subject to the satisfaction of the following conditions:
          (a)  if required by Delaware law, this Agreement shall have been
approved and adopted by the stockholders of Company;

          (b)  Merger Sub shall have accepted for exchange and exchanged all of
the Shares tendered pursuant to the Offer;

          (c)  no provision of any applicable law or regulation and no judgment,
injunction, order or decree shall prohibit the consummation of the Merger;
<PAGE>

          (d)  the Registration Statement or the Post-Effective Amendment, as
the case may be, shall have been declared effective and no stop order suspending
effectiveness shall be in effect and no proceedings for such purpose shall be
pending before or threatened by the SEC; and

          (e)  the shares of Parent Common Stock to be issued in the Merger
shall have been approved for listing on the NASDAQ National Market System,
subject to official notice of issuance.


Article VIII.
Termination, Amendment and Waiver

     (sss)  Section 8.1  Termination.  This Agreement may be terminated and the
                         -----------
Merger may be abandoned at any time prior to the Appointment Date
(notwithstanding any approval of this Agreement by the stockholders of Company):
          (a)  by mutual written agreement of Company and Parent; or

          (b)  by either Company or Parent, if:

               (i)  the Offer shall have expired or been terminated in
          accordance with the terms of this Agreement without Parent or Merger
          Sub having accepted for exchange any Shares pursuant to the Offer,
          provided that Parent and Merger Sub shall not be permitted to
          terminate this Agreement pursuant to this Section 8.1(b)(i) if the
          Offer is terminated or expires without Shares having been accepted for
          exchange as a result of a breach by Parent or Merger Sub of this
          Agreement; or

               (ii)  the Offer has not been consummated on or before September
          30, 2000 (the "End Date); provided, however, that the right to
          terminate this Agreement under this Section 8.1(b)(ii) shall not be
          available to any party whose failure to fulfill any obligation under
          this Agreement has been the principal cause of or resulted in the
          failure of the Offer to have been consummated on or before such date
          and such action or failure to act constitutes a material breach of
          this Agreement; or

               (iii)  there shall be any applicable law or regulation that makes
          consummation of the Merger illegal or otherwise prohibited or any
          judgment, injunction, order or decree of any court or governmental
          body having competent jurisdiction enjoining Company or Parent from
          consummating the Merger is entered and such judgment, injunction,
          judgment or order shall have become final and nonappealable; or

               (iv)  (A) any representation or warranty of the other party
          contained in this Agreement shall be or have become inaccurate such
          that, in the aggregate, such inaccuracies would reasonably be expected
          to have a Material Adverse Effect on such other party, or (B) the
          other party fails to perform any material covenant contained in this
          Agreement; provided, however, that such inaccuracy or failure to
          perform has not been or is incapable of being cured by such other
          party within 30 days following receipt by the terminating party of
          notice of such inaccuracy or failure to perform; or
<PAGE>

          (c) by Parent if a Triggering Event shall have occurred.

For purposes of this Agreement, a "Triggering Event" shall be deemed to have
occurred if, prior to the Appointment Time:  (i) the Board of Directors of
Company or any committee thereof shall have approved or recommended to Company
stockholders any Acquisition Proposal, (ii) the Board of Directors of Company or
any committee thereof shall for any reason have withdrawn or shall have amended
or modified in a manner adverse to Parent its Recommendations; (iii) Company
shall have failed to include in the Offer Documents, the Schedule 14D-9 or the
Post-Effective Amendment the Recommendations; or (iv) a tender or exchange offer
relating to 40% or more of the Shares shall have been commenced by a person
unaffiliated with Parent, and Company shall not have sent to its securityholders
pursuant to Rule 14e-2 promulgated under the Securities Act, within 10 business
days after such tender or exchange offer is first published sent or given, a
statement disclosing that Company recommends rejection of such tender or
exchange offer.
The party desiring to terminate this Agreement pursuant to this Section 8.1
(other than pursuant to Section 8.1(a)) shall give notice of such termination to
the other party.

     (ttt)  Section 8.2  Notice of Termination; Effect of Termination.  Any
                         --------------------------------------------
proper termination of this Agreement under Section 8.1 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 under
Section 8.1, this Agreement shall be of no further force or effect without
liability of any party (or any stockholder, director, officer, employee, agent,
consultant or representative of such party) to the other parties hereto, except
(i) as set forth in this Section 8.2, Section 8.3 and Article 9, each of which
shall survive the termination of this Agreement, and (ii) that 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. In the
event that Company gives Parent notice of an inaccuracy or failure to perform
such that this Agreement would be subject to termination pursuant to Section
8.1(b)(iv), Parent shall cause Merger Sub to not consummate the Offer until such
inaccuracy or failure to perform is cured.

     (uuu)  Section 8.3  Fees and Expenses.  (a) General. Except as set forth in
                         -----------------
this Section 8.3, 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 Registration Statement (including
financial statements and exhibits) and any amendments or supplements thereto.
          (b)  Company Payments.  If this Agreement is terminated by Parent or
Company, as applicable, prior to the appointment time pursuant to Sections
8.1(b)(i) or (ii) or Section 8.1(c), Company shall promptly, but in any event no
later than two days after the date of such termination, pay Parent a fee equal
to $50 million in immediately available funds (the "Termination Fee"); provided,
that in the case of a termination under Section 8.1(b)(i) or (ii) prior to which
no Triggering Event has occurred, (i) such payment shall be made only if (A)
following the date of this Agreement and prior to the termination of this
Agreement, any Acquisition Proposal shall have been publicly announced or shall
have become publicly known and not withdrawn at least 5 business days prior to
<PAGE>

the scheduled expiration date of the Offer, and (B) within 12 months following
the termination of this Agreement, either a Company Acquisition (as defined
below) is consummated, or Company enters into an agreement providing for a
Company Acquisition and such Company Acquisition is later consummated, and (ii)
such payment shall be made promptly, but in any event no later than two days
after the consummation of such Company Acquisition.  Company acknowledges that
the agreements contained in this Section 8.3(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 to
pay in a timely manner the amounts due pursuant to this Section 8.3(b), and, in
order to obtain such payment, Parent makes a claim that results in a judgment
against Company, Company shall pay to Parent its reasonable costs and expenses
(including reasonable attorneys' fees and expenses) in connection with such
suit, together with interest on the amounts set forth in this Section 8.3(b) at
the prime rate of The Chase Manhattan Bank in effect on the date such payment
was required to be made.  Payment of the fees described in this Section 8.3(b)
shall not be in lieu of damages incurred in the event of breach of this
Agreement.

          For the purposes of this Agreement, "Company Acquisition" shall mean
any of the following transactions (other than the transactions contemplated by
this Agreement): (i) a sale or other disposition by Company of a business or
assets representing 40% or more of the consolidated net revenues, net income or
assets of Company immediately prior to such sale; (ii) the acquisition by any
person or group (including by way of a tender offer or an exchange offer or
issuance by Company), directly or indirectly, of beneficial ownership or a right
to acquire beneficial ownership of shares representing 40% or more of any class
of equity securities of Company; or (iii) a merger, consolidation, business
combination, recapitalization, liquidation, dissolution or similar transaction
involving Company (other than a transaction in which Company is the acquiror and
in which the current Company stockholders retain more than 60%, directly or
indirectly, of the surviving or successor corporation); it being understood that
a widely distributed offering of Company Common Stock shall not constitute a
Company Acquisition.

     (vvv)  Section 8.4  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.

     (www)  Section 8.5  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 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 IX.
General Provisions
<PAGE>

     (xxx)  Section 9.1  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.

     (yyy)  Section 9.2  Notices.  All notices and other communications
                         -------
hereunder shall be in writing and shall be deemed given upon delivery either
personally or by commercial delivery service, or sent via facsimile (receipt
confirmed) to the parties at the following addresses or facsimile numbers (or at
such other address or facsimile numbers for a party as shall be specified by
like notice):

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

               Vignette Corporation
               901 South Mopac Expressway
               Austin, Texas  78746
               Attention:  Senior Vice President-Corporate Development
               Facsimile No.:   512-306-4510


               with a copy to:
               Davis Polk & Wardwell
               1600 El Camino Real
               Menlo Park, California 94025
               Attention:  David W. Ferguson
               Facsimile No.: 650-752-2111



          (b)  if to Company, to:

               OnDisplay, Inc.
               12667 Alcosta Boulevard
               Suite 250
               San Ramon, CA  94583
               Attention:  David Petroni
               Facsimile No.:   925-480-1000


               with a copy to:
               Wilson Sonsini Goodrich & Rosati
               One Market
               Spear Street Tower
               Suite 1600
               San Francisco, CA  94105
               Attention:   Michael J.Kennedy
                            Robert T. Ishii
<PAGE>

               Facsimile No.: 415-947-2099

     (zzz)  Section 9.3  Interpretation; Certain Defined Terms.  (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 executive officers of such party has actual knowledge of such matter, after
reasonable inquiry of such matter.  For purposes of this definition, the
"executive officers" of Company shall be those person listed on Part 9.3(b) of
the Company Disclosure Letter.

          (c)  For purposes of this Agreement, the term "Material Adverse
Effect" when used in connection with an entity means any change, event,
circumstance or effect that is or is reasonably likely to be materially adverse
to the business, assets (including intangible assets), capitalization, financial
condition, operations or results of operations of such entity taken as a whole
with its subsidiaries, except to the extent that any such change, event,
circumstance or effect results from (i) changes in general economic conditions,
(ii) changes affecting the industry generally in which such entity operates
(provided that such changes do not affect such entity in a substantially
disproportionate manner), (iii) changes in the trading prices for such entity's
capital stock, and (iv) changes that are attributable to the announcement or
pendency of or compliance with this Agreement or the transactions contemplated
hereby or to actions taken by Company that are jointly agreed between Company
and Parent.

          (d)  For purposes of this Agreement, the term "person" shall mean any
individual, corporation (including any non-profit corporation), general
partnership, limited partnership, limited liability partnership, joint venture,
estate, trust, company (including any limited liability company or joint stock
company), firm or other enterprise, association, organization, entity or
Governmental Entity.

          (e)  For purposes of this Agreement, "subsidiary" of a specified
entity will be any corporation, partnership, limited liability company, joint
venture or other legal entity of which the specified entity (either alone or
through or together with any other subsidiary) owns, directly or indirectly, 50%
or more of the stock or other equity or partnership interests the holders of
which are generally entitled to vote for the election of the Board of Directors
or other governing body of such corporation or other legal entity.
<PAGE>

     (aaaa)  Section 9.4  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.

     (bbbb)  Section 9.5  Entire Agreement; Third Party Beneficiaries.  This
                          -------------------------------------------
Agreement, its Exhibits and the documents and instruments and other agreements
among the parties hereto as contemplated by or referred to herein, including the
Company Disclosure Letter and the Parent Disclosure Letter (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, other
than the Continuing Directors, except as specifically provided in Section 6.12.

     (cccc)  Section 9.6  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.

     (dddd)  Section 9.7  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.

     (eeee)  Section 9.8  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.

     (ffff)  Section 9.9  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.
<PAGE>

     (gggg)  Section 9.10  Assignment.  No party may assign either this
                           ----------
Agreement or any of its rights, interests, or obligations hereunder without the
prior written consent of the other parties hereto. 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. Any
purported assignment in violation of this Section shall be void.

     (hhhh)  Section 9.11  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.

                            * * * * *
<PAGE>

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

                                    VIGNETTE CORPORATION

                                        /s/ Joel G. Katz
                                    By: ________________________________
                                    Name: Joel G. Katz
                                    Title: Chief Financial Officer


                                    WHEELS ACQUISITION CORP.

                                        /s/ Joel G. Katz
                                    By: ________________________________
                                    Name: Joel G. Katz
                                    Title: President and Assistant Secretary


                                    ONDISPLAY, INC.

                                        /s/ Mark A. Pine
                                    By: ________________________________
                                    Name: Mark A. Pine
                                    Title: Chairman and Chief Executive Officer
<PAGE>

                                                                         ANNEX I

                            CONDITIONS TO THE OFFER

Notwithstanding any other provision of the Offer, subject to the terms of this
Agreement, Merger Sub shall not be required to accept for exchange or exchange
or deliver any shares of Parent Common Stock for (subject to any applicable
rules and regulations of the SEC, including Rule 14e-1(c) under the Exchange Act
(relating to Merger Sub's obligation to pay for or return tendered Shares after
the termination or withdrawal of the Offer)) any Shares tendered, if by the
expiration of the Offer (as it may be extended in accordance with the
requirements of Section 1.1), (1) the Minimum Condition shall not have been
satisfied, (2) the applicable waiting period under the HSR Act shall not have
expired or been terminated, (3) the Registration Statement shall not have become
effective under the Securities Act or shall be the subject of any stop order or
proceedings seeking a stop order, (4) the shares of Parent Common Stock to be
issued in the Offer and the Merger shall not have been approved for listing on
the NASDAQ National Market System, subject to official notice of issuance, (5)
Parent shall not have received an opinion of Davis Polk & Wardwell, in form and
substance reasonably satisfactory to Parent and to Company, on the basis of
reasonable customary facts, representations and assumptions set forth in such
opinion, to the effect that the Transaction will be treated for federal income
tax purposes as a reorganization within the meaning of Section 368(a) of the
Code and that each of Parent, Merger Sub and Company will be a party to the
reorganization within the meaning of Section 368(b) of the Code, (6) Company
shall not have received an opinion of Wilson Sonsini Goodrich and Rosati,
Professional Corporation, in form and substance reasonably satisfactory to
Parent and to Company, on the basis of reasonable customary facts,
representations and assumptions set forth in such opinion, to the effect that
the Transaction will be treated for federal income tax purposes as a
reorganization within the meaning of Section 368(a) of the Code and that each of
Parent, Merger Sub and Company will be a party to the reorganization within the
meaning of Section 368(b) of the Code; provided, however, that if Wilson Sonsini
Goodrich and Rosati does not render such opinion, this condition shall
nonetheless be deemed to be satisfied if Davis Polk & Wardwell renders such
opinion to the Company or (6) at any time on or after the date of this Agreement
and prior to the acceptance for exchange of Shares pursuant to the Offer, any of
the following conditions exist and are continuing:

          (a) there shall be instituted or pending any action or proceeding by
any government or governmental authority or agency, domestic, foreign or
supranational, before any court or governmental authority or agency, domestic,
foreign or supranational challenging or seeking to make illegal, to delay
materially or otherwise directly or indirectly to restrain or prohibit the
making of the Offer, the acceptance for payment of or payment for some or all of
the Shares by Parent or Merger Sub or the consummation of the Merger; or

          (b)  a judgment, order, decree, statute, law, ordinance, rule or
regulation, entered, enacted, promulgated, enforced or issued by any court,
government or governmental authority or agency, domestic, foreign or
supranational or any other legal restraint or prohibition preventing the
consummation of the Offer or making the Offer illegal shall be in effect; or
<PAGE>

          (c) Company shall have failed to perform in any material respect any
of its covenants, obligations or agreements under this Agreement such that the
aggregate of all such breaches would reasonably be expected to have a Material
Adverse Affect on Company; or

          (d) the representations and warranties of Company contained in this
Agreement, disregarding all qualifications and exceptions contained therein
relating to materiality or Material Adverse Effect or any similar standard or
qualification, shall be true at and as of the expiration of the Offer as if made
at and as of such time (other than representations or warranties that address
matters only as of a certain date, which shall be true and correct as of such
date), with such exceptions as would not reasonably be expected to have,
individually or in the aggregate, a Material Adverse Effect on Company; or

          (e) the Merger Agreement shall have been terminated in accordance with
its terms.

The foregoing conditions are for the sole benefit of Parent and Merger Sub and
may, subject to the terms of the Merger Agreement, be waived by Parent and
Merger Sub in their reasonable discretion in whole at any time or in part from
time to time.

<PAGE>

DESCRIPTION:  PRESS RELEASE DATED 5/22/00



                                 EXHIBIT 99.1
- --------------------------------------------------------------------------------

                VIGNETTE CORPORATION TO ACQUIRE ONDISPLAY, INC.

  Vignette V/5 eBusiness Platform Enhanced with Leading Supplier of Solutions

         for B2B Commerce, Online Marketplaces, Enterprise Integration

     AUSTIN, TX and SAN RAMON, CA - May 22, 2000 - Vignette Corporation
(Nasdaq:VIGN), the leading supplier of eBusiness applications, and OnDisplay,
Inc. (Nasdaq:ONDS) today announced that they have signed a definitive merger
agreement under which Vignette will issue 1.58 shares of its stock for each
outstanding share of OnDisplay. The combination of Vignette's V/5 suite and
OnDisplay's XML-based business-to-business infrastructure products will create
the industry's most comprehensive offering for companies serious about building
businesses online.

     OnDisplay's business-to-business, "B2B" infrastructure products enable
organizations to integrate more closely with their customers, suppliers and
business partners through the real-time exchange of information and
transactions. OnDisplay's XML technology allows critical business information -
such as purchase orders, inventory status checks, invoices and product catalog
data - to
<PAGE>

be integrated, aggregated and exchanged between multiple suppliers and
distribution partners quickly and efficiently. This functionality increases a
business's online selling effectiveness and extends its trading networks to
suppliers and vertical marketplaces through secure, guaranteed online
connections.

     "Our customers increasingly require coordination between enterprise
systems, suppliers, and multiple online marketplaces. OnDisplay's strong market
momentum, world-class customers and powerful XML-centric architecture are a
natural complement to Vignette," said Greg Peters, President and CEO Vignette.
"The acquisition of OnDisplay furthers Vignette's stated mission to provide the
broadest and deepest application platform to support the needs of companies who
are serious about building businesses online."

     Vignette's recently announced V/5 eBusiness Plaform provides an open and
scalable high-performance architecture, a suite of integrated products providing
personalization, content management, campaign management, customer analysis,
syndication and multi-channel communications capabilities, and a high-level
application foundation for creating and managing componetized eBusiness
applications. Together, Vignette and OnDisplay will offer eBusiness applications
that power automated cross-enterprise transactions and highly personalized end-
user interaction.

     Customer Benefits -- Collaborative Commerce

     The combined Vignette and OnDisplay product lines provide personalized end-
user interaction, market-leading content management, inter-enterprise
application integration, transaction support, business process automation, and
comprehensive business analysis - all of the critical application functionality
for running a business online, leveraging back-office data and managing
relationships with suppliers, vendors and customers.

     B2B commerce requires automation of business transactions between trading
partners and integration of back-office systems with web-based commerce systems.
For example, purchase orders implemented as cXML based transactions or
connections to ERP systems using standard XML interfaces will increasingly be
required for online marketplaces and the Fortune 1000 companies who wish to
participate in them. Combining the business process automation capabilities of
OnDisplay with the real-time personalization, analysis and content management
capabilities of Vignette's V/5 eBusiness platform will enable companies to
tightly coordinate their suppliers and distributors to create true
"collaborative" commerce.

     The Combined Company

     The acquisition further solidifies Vignette's leadership position in the
eBusiness applications market. With the acquisition, Vignette will have
approximately 2,000 employees, 870 customers and global operations - from the
U.S. to South America, Europe, Asia and Australia. The acquisition adds leading
trading networks and online marketplaces to Vignette's customer base, already
the largest in the industry. OnDisplay's customers span the manufacturing,
healthcare, life sciences, and construction industries and include W.W.
Grainger, Sciquest.com, FuelQuest.com, PurchasePro.com, Harbinger.net, Aspect
Development and TPN Register. The two companies share
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more than 20 joint
customers today, including, The Associates Corporation, PurchasingCenter.com,
QuestLink Technology, Inc., Sabre, Travelocity.com, The Tribune Corporation, and
Trip.com.

     "Our eMarketplace customers have told us how important a complete and
integrated solution is - one that both reaches out to consumers and back to
suppliers, vendors and the back-office. Together with Vignette we now provide
the industry's only true end-to-end solution," said Mark Pine, chairman and CEO
of OnDisplay. "The vision, technology and cultural fit with Vignette will create
an unbeatable combination for our customers to build their online businesses."

     Key Technologies

     OnDisplay's solutions for B2B commerce, online marketplaces and enterprise
integration complement Vignette's V/5 platform and include:

     eBizXchange

     OnDisplay's B2B integration application for secure, real-time business
document exchange among trading partners, using xML-based protocols. eIntegrate.
A powerful application for integrating the e-business site with internal ERP,
CRM and legacy systems.

     eContent

     A full-featured content aggregation application for capturing and
transforming diverse content from heterogeneous sources, including HTML, XML,
flat file, database, and application-based data.

     eNotify

     A permission-based alerting system for event-based notification.

     eSyndicate

     A robust and scalable application for content syndication using a
publish/subscribe paradigm for brokering and routing content among trading
partners.

     XML Connect

     A free B2B XML server that allows e-commerce participants -- including
buyers, suppliers and e-marketplaces -- to establish secure, guaranteed XML
business document exchange.

     Terms of the Agreement

     In a stock-for-stock, tax-free transaction, each outstanding share of
OnDisplay will be exchanged for 1.58 shares of Vignette. Based on fully diluted
shares outstanding and both companies' closing price as of Friday, May 19, this
transaction represents a purchase price of approximately $1.7 billion. Vignette
will account for the transaction using purchase accounting and
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expects to close the transaction in the third quarter, subject to approval by
OnDisplay's stockholders and other customary closing conditions.

     About Vignette Corporation

     Vignette Corporation (Nasdaq: VIGN) is the leading supplier of eBusiness
applications. Vignette's products enable businesses to create and extend
relationships with prospects and customers and ease high-volume transaction
exchanges with suppliers and partners, all of which enhances customer
satisfaction. Vignette powers more than 600 leading eBusinesses. Headquartered
in Austin, Texas, Vignette Corporation has offices located throughout Europe,
Asia, and in Australia and can be found on the Web at http://www.vignette.com.

     About OnDisplay

     OnDisplay is a leading provider of e-business infrastructure software
applications for powering e-business portals and e-marketplaces. In January
2000, OnDisplay acquired Oberon Software, a leading provider of business process
automation software and services for enabling e-business communities.
OnDisplay's product suite enables customers to increase their online selling
effectiveness and extend their trading networks to suppliers and vertical
marketplaces. OnDisplay is located in San Ramon, California and can be reached
at http://www.ondisplay.com.

     Forward Looking Statements

     This press release contains forward-looking statements within the meaning
of the Safe Harbor Provisions of the Private Securities Litigation Reform Act of
1995. Such statements are based on the current expectations and beliefs of
managements of Vignette and OnDisplay and are subject to a number of factors and
uncertainties that could cause actual results to differ materially from those
described in the forward-looking statements. In particular, the following
factors, among others, could cause actual results to differ materially from
those described in the forward-looking statements: failure of the transaction to
close due to the failure to obtain regulatory or other approvals; failure of the
OnDisplay stockholders to approve the merger, if that approval is necessary; the
risk that the Vignette and OnDisplay businesses will not be integrated
successfully and unanticipated costs of such integration; failure of the
combined company to retain and hire key executives, technical personnel and
other employees; failure of the combined company to manage its growth and the
difficulty of successfully managing a larger organization; failure of the
combined company to successfully manage its changing relationships with
customers, suppliers and strategic customers; failure of the combined company's
customers to accept the new service offerings and, in particular, the risk that
businesses and consumers may not adopt the Internet for electronic commerce as
rapidly as anticipated; the risk that security breakdowns on the Internet might
adversely affect the growth of electronic commerce; and competition in the
various markets serviced by the combined company.

     For a detailed discussion of these and other cautionary statements, please
refer to the registration statement to be filed by Vignette and OnDisplay with
the Securities and Exchange Commission, as well as the companies' respective
Forms 10K and 10Q filed with the Securities and Exchange Commission. When these
and other documents are filed with the SEC, they may be
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obtained free of charge at the SEC's Web Site at http://www.sec.gov. These
documents may also be obtained from Vignette or OnDisplay by directing such
requests to the respective address listed below.

     Press contacts:
     Mike Berman, Director of Public Relations, Vignette Corporation, 512-306-
4910, [email protected]

     Leah Bibbo, Public Relations Manager, OnDisplay, 925-480-1125,
[email protected]

     Investor Relations:

     Kellie Nugent, Manager Investor Relations, Vignette Corporation, 512-306-
4541, [email protected] Debbie Demer, Demer IR Counsel, Investor Relations
for OnDisplay, 925-938-2678, [email protected]


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