OBJECTIVE SYSTEMS INTEGRATORS INC
DEF 14A, 1998-10-16
PREPACKAGED SOFTWARE
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<PAGE>
 
                           SCHEDULE 14A INFORMATION
<TABLE> 
<CAPTION> 
<S>                             <C> 
                Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 
                                              (Amendment No.  )

        
Filed by the Registrant [X]

Filed by a Party other than the Registrant [_] 


Check the appropriate box:

[_]  Preliminary Proxy Statement        [_]  Confidential, for Use of the Commission Only 
                                             (as permitted by Rule 14a-6(e)(2))
[X]  Definitive Proxy Statement              

[_]  Definitive Additional Materials 

[_]  Soliciting Material Pursuant to Section 240.14a-11(c) or Section 240.14a-12

                                           Objective Systems Integrators, Inc.
                             ----------------------------------------------------------------
                                     (Name of Registrant as Specified In Its Charter)


   
Payment of Filing Fee (Check the appropriate box):
[X]  No fee required.

[_]  Fee computed on table below per Exchange Act Rules 14a-6(i)(4) and 0-11.
     (1) Title of each class of securities to which transaction applies:
     (2) Aggregate number of securities to which transaction applies:
     (3) Per unit price or other underlying value of transaction computed pursuant to Exchange Act 
         Rule 0-11 (Set forth the amount on which the filing fee is calculated and state how it was determined):
     (4) Proposed maximum aggregate value of transaction:
     (5) Total fee paid:

[_]  Fee paid previously with preliminary materials.
     
[_]  Check box if any part of the fee is offset as provided by Exchange Act Rule 0-11(a)(2) and identify the 
     filing for which the offsetting fee was paid previously. Identify the previous filing by registration statement
     number, or the Form or Schedule and the date of its filing.
     (1) Amount Previously Paid:
     (2) Form, Schedule or Registration Statement No.:
     (3) Filing Party:
     (4) Date Filed:

Notes:


</TABLE> 
<PAGE>
 
                      OBJECTIVE SYSTEMS INTEGRATORS, INC.
 
                               ----------------
 
                   NOTICE OF ANNUAL MEETING OF STOCKHOLDERS
 
                         TO BE HELD NOVEMBER 18, 1998
 
TO THE STOCKHOLDERS:
 
  NOTICE IS HEREBY GIVEN that the Annual Meeting of Stockholders of Objective
Systems Integrators, Inc., a Delaware corporation ("OSI"), will be held on
Wednesday, November 18, 1998, at 10:00 a.m. local time, at the Lake Natoma
Inn, 702 Gold Lake Drive, Folsom, California 95630, for the following
purposes:
 
  1. To elect five directors to serve until the next Annual Meeting or until
     their successors are elected and qualified.
 
  2. To approve an amendment to the 1995 Employee Stock Purchase Plan to
     increase the number of shares of Common Stock reserved for issuance by
     1,000,000 shares.
 
  3. To ratify the appointment of Deloitte & Touche LLP as independent
     auditors for the fiscal year ending June 30, 1999.
 
  4. To transact such other business as may properly come before the Meeting.
 
  More detail about the stated purposes of the Meeting can be found in the
Proxy Statement that accompanies this Notice. The record date for the Meeting
is October 8, 1998. Only stockholders of record at the close of business on
that date will be given notice of the Meeting and are entitled to vote.
 
  All stockholders are invited to attend the Meeting. We urge you to mark,
sign, date and return a Proxy as promptly as possible to ensure that your
shares are represented. A postage-prepaid envelope has been enclosed for that
purpose. If you do attend the Meeting, you may vote in person even if you have
returned a Proxy.
 
                                          Sincerely,
 
                                          /s/ Philip N. Cardman
 
                                          Philip N. Cardman
                                          Vice President, General Counsel and
                                           Secretary
 
Folsom, California
October 16, 1998
 
 
                           YOUR VOTE IS IMPORTANT.
 
 TO ENSURE YOUR SHARES ARE REPRESENTED AT THE MEETING, PLEASE MARK, SIGN, DATE
                AND RETURN YOUR PROXY AS PROMPTLY AS POSSIBLE.
 
<PAGE>
 
                      OBJECTIVE SYSTEMS INTEGRATORS, INC.
 
                               ----------------
 
                           PROXY STATEMENT FOR 1998
                        ANNUAL MEETING OF STOCKHOLDERS
 
                INFORMATION CONCERNING SOLICITATION AND VOTING
 
GENERAL
 
  The enclosed Proxy is being solicited on behalf of the Board of Directors
("Board") of OBJECTIVE SYSTEMS INTEGRATORS, INC., a Delaware corporation
("OSI"), for use at our Annual Meeting of Stockholders ("Annual Meeting") to
be held Wednesday, November 18, 1998, at 10:00 a.m. local time (or at any
adjournment of the Annual Meeting), and for the purposes described in this
Proxy Statement. The Annual Meeting will be held at the Lake Natoma Inn, 702
Gold Lake Drive, Folsom, California 95630. OSI's principal executive offices
are at 100 Blue Ravine Road, Folsom, California 95630. Our telephone number is
(916) 353-2400.
 
  These proxy solicitation materials and the Annual Report to Stockholders for
the year ended June 30, 1998, were first mailed on or about October 16, 1998,
to all stockholders entitled to vote at the Annual Meeting.
 
RECORD DATE AND OUTSTANDING SHARES
 
  Stockholders of record at the close of business on October 8, 1998 ("Record
Date") will be given notice of the Annual Meeting and are entitled to vote.
OSI has one series of Common Shares outstanding, designated Common Stock,
$.001 par value per share ("Common Stock"). On the Record Date, 34,816,503
shares of Common Stock were issued and outstanding. They were held of record
by 140 stockholders.
 
REVOCABILITY OF PROXIES
 
  Proxies can be revoked at any time before their use by (a) delivering a
written notice of revocation to our Secretary, (b) delivering a duly executed
proxy bearing a later date to our Secretary, or (c) attending the Annual
Meeting and voting in person.
 
VOTING AND SOLICITATION
 
  You have one vote for each share of Common Stock held on the Record Date. In
voting for the election of directors (Proposal One) you may cumulate your
votes. For cumulative voting, the total number of votes that may be cast is
five times the number of shares that you are entitled to vote. One candidate
may be given all of your votes or they may be distributed among as many
candidates as you chose. However, (a) votes cannot be cast for more than five
candidates or for a candidate who has not been nominated before the voting,
and (b) cumulative voting will not apply unless at least one stockholder has
given notice, before the voting, of the intention to cumulate. On all other
matters, each share of Common Stock has one vote. A majority of the
outstanding shares of Common Stock on the Record Date must be represented at
the Annual Meeting for business to be transacted. Abstentions and Broker
Nonvotes will be counted in establishing a quorum.
 
  This solicitation is being made by OSI, who will bear all related costs.
Chase Mellon Shareholder Services has been employed to distribute stockholder
materials, both to stockholders of record and to organizations representing
beneficial owners. OSI will reimburse Chase Mellon for this service. We may
also reimburse brokerage firms and others representing beneficial owners for
their expenses in forwarding solicitation material to beneficial owners. In
addition, proxies may be solicited, without additional compensation, by our
directors, officers and other employees.
 
                                       1
<PAGE>
 
QUORUM, ABSTENTIONS AND BROKER NONVOTES
 
  Votes cast at the Annual Meeting will be counted by the Inspector of
Elections ("Inspector"), who is a representative of our Transfer Agent. The
Inspector will also determine whether a quorum is present. For proposals to be
approved, Delaware law generally requires an affirmative vote by a majority of
shares present (in person or by proxy) at a duly held meeting where there is a
quorum. Delaware law also generally provides that a quorum for a meeting will
exist only if a majority of the shares entitled to vote at the meeting are
present either in person or by proxy.
 
  In determining whether a quorum is present, the Inspector will treat shares
that are voted "Withheld" or "Abstain" as being present and entitled to vote.
They will not be treated as votes in favor of any matter submitted. Proxies
which are returned using the form of proxy enclosed but which are not marked
as to a particular item, will be voted to elect the five nominated directors,
to approve amending our 1995 Employee Stock Purchase Plan, to ratify the
appointment of Deloitte & Touche LLP and, as the proxy holders deem advisable,
on any other matters that may properly come before the Annual Meeting.
 
  If a broker indicates that it has no discretionary authority for a
particular matter ("Broker Nonvotes"), the Inspector will not consider the
shares held by the broker as being present in determining whether a quorum
exists for that matter.
 
  We believe that these tabulation procedures are consistent with Delaware law
and our Bylaws.
 
DEADLINE FOR STOCKHOLDER PROPOSALS
 
  Stockholder proposals for the next Annual Meeting of Stockholders must be
received by OSI not later than June 11, 1999, to be considered for inclusion
in the Proxy Statement and form of Proxy relating to the Annual Meeting.
 
                                       2
<PAGE>
 
        SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT
 
  The following table has information on the beneficial ownership of our
Common Stock as of October 8, 1998, for (a) each person that we know
beneficially owns more than 5% of the outstanding shares of our Common Stock,
(b) each of our directors, (c) each of our officers named in the Summary
Compensation Table on page 12, and (d) all of our directors and executive
officers as a group.
 
<TABLE>
<CAPTION>
FIVE- PERCENT STOCKHOLDERS, DIRECTORS     COMMON STOCK        APPROXIMATE
AND CERTAIN EXECUTIVE OFFICERS         BENEFICIALLY OWNED PERCENTAGE OWNED(1)
- -------------------------------------  ------------------ -------------------
<S>                                    <C>                <C>
Colorado State Bank and Trust,
Trustee(2)............................      8,000,000            27.85%
 1600 Broadway, Suite 300
 Denver, CO 80202
Tom L. Johnson(3).....................      6,180,273            21.52%
Richard G. Vento(4)...................      6,180,271            21.52%
Jonathan B. Shantz (5)................      1,315,789             4.58%
Dr. Kornel Terplan (6)................        374,421             1.08%
James K.R. Souders (7)................        198,855                *
Dan D. Line (8).......................        204,435                *
David M. Allen (9)....................         80,938                *
George F. Schmitt (10)................         61,042                *
Patric R. Olenczak (11)...............         17,708                *
Philip N. Cardman (12)................         89,063                *
Jay West (13).........................         26,140                *
All directors and executive officers
as a group (10 persons)...............     14,728,935            41.61%
</TABLE>
- --------
  *  Less than 1% of the outstanding shares.
 (1) Options exercisable on or before December 7, 1998, are treated as being
     outstanding in computing both ownership and percentage ownership for the
     optionee, but not in computing the percentage of any other person.
     Percentage ownership is based on 34,816,503 shares of Common Stock
     outstanding as of October 8, 1998, together with options held by each
     individual. Beneficial ownership is determined according to the
     Securities and Exchange Commission ("SEC") rules, and includes voting and
     investment power with respect to shares.
 (2) Includes 2,000,000 shares held in each of two Grantor Retained Annuity
     Trusts (GRATs) created by Mr. Johnson and Mr. Johnson's wife, 1,750,000
     shares held in each of two GRATs created by Mr. Vento and Mr. Vento's
     wife, as well as 250,000 shares held in each of two Charitable Lead
     Trusts created by Mr. Vento and Mr. Vento's wife. Colorado State Bank and
     Trust is the trustee of each of the trusts and exercises sole voting and
     investment power over the shares.
 (3) Includes 549,505 shares owned directly by Mr. Johnson in addition to
     549,505 shares owned by Mr. Johnson's wife, 2,376,237 shares owned by
     Kari Anne Johnson, L.L.C., 2,376,237 shares owned by Kevin Johnson,
     L.L.C. and 328,789 shares owned by Johnson L.L.C. over which Mr. Johnson
     is deemed to have share voting and investment power.
 (4) Includes 549,506 shares owned directly by Mr. Vento in addition to
     549,506 shares owned by Mr. Vento's wife, 1,584,157 shares owned by
     Nicole Vento, L.L.C., 1,584,157 shares owned by Renee Vento, L.L.C.,
     1,584,157 shares owned by Gail Vento, L.L.C. and 328,790 shares owned by
     Vento, L.L.C. over which Mr. Vento is deemed to have share voting and
     investment power.
 (5) Includes 1,315,789 shares owned by Cisco Systems, Inc. Mr. Shantz is a
     Vice President at Cisco Systems, Inc. Mr. Shantz disclaims any beneficial
     ownership of these shares.
 (6) Includes 12,500 shares of Common Stock which may be acquired under stock
     options that can be exercised on or before December 7, 1998.
 (7) Includes 116,405 shares of Common Stock which may be acquired under stock
     options that can be exercised on or before December 7, 1998.
 (8) Includes 201,796 shares of Common Stock which may be acquired under stock
     options that can be exercised on or before December 7, 1998.
 
                                       3
<PAGE>
 
 (9) Includes 71,042 shares of Common Stock which may be acquired under stock
     options that can be exercised on or before December 7, 1998.
(10) Includes 51,042 shares of Common Stock which may be acquired under stock
     options that can be exercised on or before December 7, 1998.
(11) Includes 17,708 shares of Common Stock which may be acquired under stock
     options that can be exercised on or before December 7, 1998.
(12) Includes 89,603 shares of Common Stock which may be acquired under stock
     options that can be exercised on or before December 7, 1998.
(13) Includes 26,140 shares of Common Stock which may be acquired under stock
     options that can be exercised on or before December 7, 1998.
 
                                       4
<PAGE>
 
                                 PROPOSAL ONE
 
                             ELECTION OF DIRECTORS
 
NOMINEES
 
  OSI's Bylaws provide for six directors. However, we expect that only five
directors will be elected at the Annual meeting, with one vacancy remaining
outstanding. We intend to appoint a director to fill the vacancy when a
suitable candidate is found. Unless otherwise instructed, proxy holders will
vote the proxies they receive for the five nominees listed below, all of whom
are presently directors of OSI. If a nominee is unable or declines to serve as
a director at the time of the Annual Meeting, proxies will be voted for any
nominee designated by the present Board to fill the vacancy. We are not aware
of any nominee who is unable or will decline to serve as a director. If
additional nominations are made, the proxy holders will vote the proxies they
receive (in accordance with cumulative voting) to elect as many of the
nominees listed below as is possible. The proxy holders will decide on the
specific nominees that will receive their votes. The term of office for each
person elected as a director will continue until the next Annual Meeting of
Stockholders or until a successor has been duly elected and qualified.
 
VOTE REQUIRED
 
  If a quorum is present and voting, the five nominees receiving the highest
number of votes will be elected to the Board. Abstentions and Broker Nonvotes
are not counted in electing directors.
 
NOMINEES
 
  The names of the nominees, and some information about each, are as follows:
 
<TABLE>
<CAPTION>
NAME OF NOMINEE          AGE POSITION WITH OSI
- ---------------          --- -----------------
<S>                      <C> <C>
Tom L. Johnson (1)......  53 Co-Chairman of the Board of Directors and Co-Chief Executive Officer
Richard G. Vento (1)....  58 Co-Chairman of the Board of Directors and Co-Chief Executive Officer
George F. Schmitt
(1)(2)..................  55 Director
Jonathan B. Shantz
(1)(2)..................  39 Director
Dr. Kornel Terplan
(1)(2)..................  54 Director
</TABLE>
- --------
(1) Member of Compensation Committee
(2) Member of Audit Committee
 
  There are no family relationships among the directors or executive officers.
 
  Tom L. Johnson is OSI's Co-Chief Executive Officer and Co-Chairman of the
Board. He co-founded Objective Systems Integrators, a partnership and the
predecessor to OSI, in January 1989, and was Co-Chief Executive Officer and
Chairman of the Board of Directors from 1989 to 1995. He also was President
from May 1991 to June 1994, Chief Financial Officer from July 1989 to November
1993, and Vice President, Product Development, from July 1990 to July 1995.
From January 1987 to February 1989, he co-founded and served as Vice
President, Product Development, of TelWatch, Inc., a telecommunications
software and hardware company. Before January 1987, he was for more than 22
years involved in a number of software companies, including TelAccount, Inc.,
Schmidt Associates, Computer Science Corporation, Control Data Service Bureau,
University Computing Company and MRI Systems, serving in a variety of
management and technical positions. Mr. Johnson received a B.S. degree in
Abstract Mathematics with a minor in Business Management from the University
of Houston.
 
  Richard G. Vento is OSI's Co-Chief Executive Officer and Co-Chairman of the
Board. He co-founded Objective Systems Integrators, a partnership and the
predecessor to OSI in January, 1989. He served as President from June 1994 to
July 1995, as Secretary from July 1989 to November 1993 and as Vice President,
Sales and
 
                                       5
<PAGE>
 
Marketing, from July 1990 to June 1994. From January 1987 to February 1989, he
co-founded and served as Vice President, Business Development, of TelWatch,
Inc., a telecommunications software and hardware company. Before January 1987
he was for more than 23 years involved with a number of software companies,
including TelAccount, Inc., Schmidt Associates, Computers Sciences
Corporation, ADP Network Services and TYMSHARE, Inc., serving in a variety of
management positions. Mr. Vento received a B.A. degree in Mathematics and a
B.S. degree in Business and Economic Statistics from San Francisco State
University and an A.A. degree in Liberal Arts from Foothill College.
 
  George F. Schmitt has been a director of OSI since October 1995. Mr. Schmitt
has been President of Omnipoint Communications Inc. and Executive Vice
President of Omnipoint Corporation (collectively, "Omnipoint") since October
1995. From November 1994 to September 1995, Mr. Schmitt was President and
Chief Executive Officer of PCS PrimeCo, a personal communications service
partnership formed by AirTouch Communications, NYNEX, Bell Atlantic and US
West. From November 1993 to November 1994, Mr. Schmitt was Executive Vice
President, International Operations, of AirTouch Communications. From January
1990 to March 1994, he served as Vice President of Pacific Telesis Group, a
predecessor to AirTouch. Before January 1990, Mr. Schmitt held various
management positions with Pacific Telesis Group and Pacific Bell. Mr. Schmitt
is a director of Omnipoint Corporation. Mr. Schmitt has a B.A. degree from St.
Mary's College of California and an M.S.M. degree from Stanford University.
 
  Jonathan B. Shantz has been a director of OSI since January 1996. Mr. Shantz
has been Vice President, Service Provider Market, of Cisco Systems, Inc. since
November 1995. From April 1992 to October 1995, Mr. Shantz was with British
Telecom, where he was the Head of the Applications and Information Markets
area. Before April 1992, he held various managerial positions at Bellcore and
Bell Laboratories. Mr. Shantz has a B.A. degree from UC Santa Barbara in
Economics/Mathematics, an M.S. degree from the University of Arizona in
Systems Engineering and an M.B.A. degree from Rutgers University.
 
  Dr. Kornel Terplan has been a director of OSI since August 1992. Dr. Terplan
has been the President of Performance Navigations, Inc., a telecommunications
company, since 1983. Before 1983, Dr. Terplan served as a consultant and
systems engineer to Computer Sciences Corporation and Tesdata, Inc., both
telecommunications companies. For more than 25 years, Dr. Terplan has served
as a corporate consultant providing consulting, training and product
development services to various national and multinational corporations in the
telecommunications industry, including AT&T, France Telecom and Siemens. He
has a B.A. degree in Electronics, an M.S. degree in Electronics and a Ph.D.
degree in Operational Research from the University of Dresden, Germany.
 
BOARD MEETINGS AND COMMITTEES
 
  The Board held five meetings in fiscal 1998. No director attended fewer than
75% of the Board meetings and the committees on which he served. The Board has
an Audit Committee and a Compensation Committee. The Board has no Nominating
Committee or any committee that performs that function.
 
  In fiscal 1998, the Audit Committee consisted of Messrs. Schmitt, Shantz and
Terplan. The Audit Committee oversees our independent auditors and reviews our
internal financial procedures and controls. This Committee met two times in
fiscal 1998.
 
  In fiscal 1998, the Compensation Committee consisted of Messrs. Johnson,
Vento, Schmitt, Shantz and Terplan. The Compensation Committee determines
salaries, incentives and other forms of compensation for our directors,
officers and other employees. It also administers various of our incentive
compensation and benefit plans. The Compensation Committee met two times in
fiscal 1998.
 
                                       6
<PAGE>
 
                                 PROPOSAL TWO
 
                AMENDMENT OF 1995 EMPLOYEE STOCK PURCHASE PLAN
 
  At the Annual Meeting, you are being asked to approve an amendment of our
1995 Employee Stock Purchase Plan ("Plan") to increase the number of shares
that can be issued by 1,000,000 shares. The Plan was adopted by the Board and
approved by the stockholders in August 1995. A total of 1,487,500 shares of
Common Stock can be issued under the Plan. As of the Record Date, a total of
888,522 shares had been issued at an average purchase price of $5.2877 per
share. Excluding the 1,000,000 shares for which approval is being sought at
the Meeting, 598,978 shares remain available for future issuance.
 
  The fair market value of our Common Stock on the first day of the most
recent offering period was $11.375 per share. See "Purchase Price."
 
VOTE REQUIRED
 
  The affirmative vote of at least a majority of the Votes Cast is needed to
amend the Plan. The "Votes Cast" under Delaware law are the shares of Common
Stock present at the Annual Meeting (in person or by proxy) and entitled to
vote on a matter. We will count abstentions and votes against amending the
Plan in determining whether there is a quorum for the Annual Meeting and the
number of Votes Cast. We will count Broker Nonvotes in determining the
presence or absence of a quorum, but not in determining the number of Votes
Cast.
 
  THE BOARD OF DIRECTORS RECOMMENDS THAT STOCKHOLDERS VOTE "FOR" AMENDING THE
PLAN.
 
  The essential terms of the Plan are as follows:
 
PURPOSE
 
  The purpose of the Plan is to provide our employees (and those of our
subsidiaries that the Board designates) with an opportunity to purchase our
Common Stock through accumulated payroll deductions. The Plan is intended to
qualify under Section 423 of the Internal Revenue Code of 1986 ("Code").
 
ADMINISTRATION
 
  The Plan can be administered by the Board or a committee appointed by the
Board. It is currently administered by the Board. All questions of
interpretation or application of the Plan are determined by the Board, and its
decisions are final and binding on all participants. No charge for
administrative or other costs may be made against the payroll deductions of a
participant. Members of the Board receive no additional compensation for their
services in administering the Plan.
 
OFFERING PERIODS
 
  The Plan has offering periods of approximately twenty-four months, each
divided into four six-month purchase periods. The offering periods begin the
first trading day on or after May 1 and November 1 of each year. The Board has
the power to change the length of the offering periods without stockholder
approval. The Board plans to change the length of the offering periods to
approximately six months each. This change is expected to become effective as
of November 1, 1998.
 
ELIGIBILITY
 
  Participation in the Plan is available to anyone who (a) is a regular
employee scheduled to work at least twenty hours per week and at least five
months per calendar year, and (b) was employed by OSI (or a subsidiary
designated by the Board) on the first day of the offering period.
 
  Eligible employees become participants in the Plan by delivering a
subscription agreement to our payroll department. An employee who becomes
eligible to participate in the Plan after an offering period starts may not
participate until the next offering period.
 
                                       7
<PAGE>
 
PURCHASE PRICE
 
  Shares are sold to participating employees at 85% of the fair market value
of a share of Common Stock on (a) the first day of the offering period or (b)
the last day of the purchase period, whichever is less. Under the Plan, fair
market value is the closing sales price of the Common Stock as reported on The
Nasdaq Stock Market. The closing price per share of Common Stock on the Record
Date was $3.50.
 
PAYMENT OF PURCHASE PRICE AND PAYROLL DEDUCTIONS
 
  The purchase price for the shares is accumulated by payroll deductions over
the offering period. Deductions may not exceed 15% of an employee's
compensation. Employees may stop their participation in the Plan at any time
during an offering period. An employee may also increase or decrease the rate
of deductions once during any purchase period. Payroll deductions begin on the
first payday after an offering period starts and continue at the same rate
until the end of the offering period, unless terminated or changed as provided
in the Plan.
 
PURCHASE OF STOCK AND EXERCISE OF OPTION
 
  By executing a subscription agreement to participate in the Plan, an
employee is granted an option to purchase shares of Common Stock. The maximum
number of shares that an employee can buy in a purchase period is determined
by dividing the amount of compensation withheld over the purchase period by
the lower of (a) 85% of the fair market value of a share of Common Stock on
the first day of the offering period or (b) 85% of the fair market value of a
share of Common Stock on the last day of the purchase period. However, in all
events, the total shares issued to an employee for a purchase period cannot
exceed the number that results from dividing $12,500 by the market value of a
share of Common Stock at the beginning of the offering period. Unless the
employee's participation is discontinued, the option will be exercised
automatically at the end of the purchase period.
 
  No employee can subscribe for shares under the Plan if, immediately after
the grant of the option, the employee would own, or have outstanding options
to purchase, five percent or more of our Common Stock. In addition, no
subscription can occur if, as a result, the employee could purchase during any
calendar year more than $25,000 worth of Common Stock (determined at the fair
market value of the shares at the time of grant) under all OSI employee stock
purchase plans. Finally, if the number of shares which would otherwise be
under option at the beginning of an offering period exceeds the number of
shares then available under the Plan, a pro rata allocation of the shares
remaining will be made in as equitable a manner as is practicable.
 
WITHDRAWAL
 
  An employee can withdraw from an offering in whole, but not in part, by
signing and delivering to us a notice of withdrawal. Withdrawal may be made at
any time before the end of the offering period. Withdrawal by an employee
automatically ends the employee's interest in the offering. If an employee
withdraws from an offering period, payroll deductions will not resume at the
beginning of the next offering period (as they otherwise would) unless the
employee delivers a new subscription agreement.
 
TERMINATION OF EMPLOYMENT
 
  Termination of employment for any reason, including retirement or death,
immediately ends participation in the Plan. If this occurs, payroll deductions
credited to the employee's account are returned, without interest, either to
the employee or, in the case of death, as specified by the employee in the
subscription agreement.
 
CAPITAL CHANGES
 
  If OSI's capitalization is changed in any way without our receiving
consideration (such as by a stock split or dividend) and the result changes
the number of shares of our Common Stock, appropriate adjustment will be
 
                                       8
<PAGE>
 
made in the number of shares that can be purchased and in the purchase price
per share. If dissolution or liquidation of OSI is proposed, the current
offering periods will end immediately before the transaction closes unless the
Board provides otherwise. If OSI merges with or into another corporation, or
substantially all of our assets are sold, each option under the Plan will be
assumed or an equivalent option substituted by the successor corporation, its
parent or a subsidiary. This will occur unless the Board, in its discretion,
decides to shorten the offering periods then in progress so that the option
can be exercised before the closing. Participants will be notified in writing
at least 10 days before the end of a shortened offering period.
 
NONASSIGNABILITY
 
  No rights or accumulated payroll deductions can be pledged, assigned,
transferred or otherwise disposed of by the employee other than by (a) will,
(b) the laws of descent and distribution, or (c) written designation of a
beneficiary who is to receive the employee's shares or cash on the employee's
death. OSI can treat any attempt to do so as an election to withdraw from the
current offering period.
 
AMENDMENT AND TERMINATION OF THE PLAN
 
  The Board can amend or end the Plan at any time and for any reason. However,
in most cases termination cannot affect options that have been granted nor can
an amendment change an outstanding option to adversely affect a participant's
rights. To the extent necessary to comply with Rule 16b-3 of the Securities
Exchange Act of 1934, as amended (the "Exchange Act") or with Section 423 of
the Code, or any other applicable law or regulation, we will obtain
stockholder approval of amendments to the Plan in the manner and to the degree
required. In all events, the Plan will end on July 31, 2005.
 
USE OF FUNDS
 
  Payroll deductions under the Plan do not accrue interest and can be used for
any OSI corporate purpose.
 
AUTOMATIC TRANSFER TO LOWER PRICE OFFERING PERIOD
 
  To the extent permitted by law, if the fair market value of Common Stock on
the last day of a purchase period is less than its fair market value on the
first day of an offering period, all participants in the offering period will
be automatically withdrawn after their option is exercised and re-enrolled in
the next offering period.
 
CERTAIN UNITED STATES FEDERAL INCOME TAX INFORMATION
 
  The Plan is intended to qualify under Section 423 of the Code. Under Section
423, no income is taxable to an employee until shares are sold or otherwise
transferred. On sale or transfer, the employee will generally be taxed, with
the amount of the tax depending on how long the stock has been held. If the
sale or transfer takes place within two years after the first day of the
offering period, or within one year after the shares are purchased, ordinary
income will result. The amount of this income will be the lesser of (a) the
excess of the fair market value of the shares when they are sold or
transferred over their purchase price or (b) 15% of the fair market value of
the shares at the start of the offering period. Additional gain will be
treated as long-term capital gain. If these holding periods are not met, the
amount of ordinary income will be the excess of the shares' fair market value
when they are purchased over their purchase price. Additional gains or losses
will be long-term or short-term capital gain or loss, depending on the holding
period. Generally, OSI will have a deduction for the ordinary income
recognized by employees if they sell or transfer shares before the end of
these holding periods.
 
  This is only a summary of the federal income tax effects on OSI and a
participant. It is not complete and does not discuss the tax consequences of a
participants death. It also does not discuss the income tax laws of any
municipality, state or foreign country in which a participant may reside.
 
                                       9
<PAGE>
 
PARTICIPATION IN THE PLAN
 
  Participation in the Plan is voluntary. Each eligible employee must elect to
participate and must set the level of his or her payroll deductions. As a
result, we cannot determine future purchases under the Plan. Nonemployee
directors are not permitted to participate in the Plan.
 
  The following table has information about shares purchased during our fiscal
year ended June 30, 1998, by each of our executive officers named in the
Summary Compensation Table who participated in the Plan, all of our current
executive officers as a group and all other employees who participated in the
Plan as a group.
 
<TABLE>
<CAPTION>
                                                          NUMBER OF
                                                           SHARES      DOLLAR
NAME OF INDIVIDUAL OR IDENTITY OF GROUP AND POSITION      PURCHASED VALUE ($)(1)
- ----------------------------------------------------      --------- ------------
<S>                                                       <C>       <C>
Tom L. Johnson...........................................       --            --
Richard G. Vento.........................................       --            --
David M. Allen...........................................       --            --
Dan D. Line..............................................    2,739     19,849.26
James K.R. Souders.......................................    2,738     19,842.01
Philip N. Cardman........................................       --            --
Patric R. Olenczak.......................................       --            --
R. Jay West..............................................       --            --
All current executive officers as a group (7 persons)....    2,738     19,842.01
All other employees as a group...........................  588,802  2,545,197.49
All current non-executive directors*.....................       --            --
</TABLE>
- --------
 *  Not eligible to participate in the Plan
(1) Fair market value of shares on date of purchase minus the purchase price
    under the Plan
 
                                      10
<PAGE>
 
                                PROPOSAL THREE
 
              RATIFICATION OF APPOINTMENT OF INDEPENDENT AUDITORS
 
  The Board has selected Deloitte & Touche LLP, independent auditors, to audit
our consolidated financial statements for the fiscal year ending June 30,
1999, and recommends that you ratify that appointment. Even if the appointment
is ratified, the Board may appoint new independent auditors at any time during
the year if it determines that the change would be in the best interest of OSI
and its stockholders. If there is a negative vote on ratification, the Board
will reconsider its selection.
 
  Deloitte & Touche LLP has audited our financial statements annually since
1993. Representatives of Deloitte & Touche LLP have been invited to the Annual
Meeting and will be given an opportunity to make a statement if they wish. We
also expect that they will be available to respond to appropriate questions.
 
  THE BOARD RECOMMENDS A VOTE "FOR" RATIFYING DELOITTE & TOUCHE LLP AS OSI'S
INDEPENDENT AUDITORS.
 
                                      11
<PAGE>
 
                   EXECUTIVE COMPENSATION AND OTHER MATTERS
 
EXECUTIVE COMPENSATION
 
  The following Summary Compensation Table contains information regarding the
compensation of our Chief Executive Officers and our other most highly
compensated officers for the fiscal years ended June 30, 1998, June 30, 1997,
and June 30, 1996.
 
                          SUMMARY COMPENSATION TABLE
 
<TABLE>
<CAPTION>
                                                                             LONG-TERM
                                                                        COMPENSATION AWARDS
                                                                       ---------------------
                                      ANNUAL COMPENSATION
                                ------------------------------------   RESTRICTED SECURITIES
NAME AND PRINCIPAL       FISCAL                                          STOCK    UNDERLYING      ALL OTHER
POSITION                  YEAR  SALARY($)     BONUS($) COMMISSION($)   AWARDS($)  OPTIONS(#)     COMPENSATION
- ------------------       ------ ---------     -------- -------------   ---------- ----------     ------------
<S>                      <C>    <C>           <C>      <C>             <C>        <C>            <C>
Tom L. Johnson(1).......  1998        --           --          --          --           --              --
 Co-Chairman of the       1997    87,501           --          --          --           --              --
 Board,                   1996   350,004           --          --          --           --           3,875 (2)
 Co-Chief Executive       
 Officer
Richard G. Vento(1).....  1998        --           --          --          --           --              --
 Co-Chairman of the       1997    87,501           --          --          --           --              --
 Board,                   1996   350,004           --          --          --           --           7,299 (2)
 Co-Chief Executive       
 Officer
David M. Allen..........  1998   175,000       13,827          --          --           --              --
 Chief Financial          1997   168,381           77          --          --      275,000 (4)     114,358 (5)
 Officer; Vice            1996        -- (3)       --          --          --           --              --
 President, Finance and   
 Administration
Philip N. Cardman.......  1998   203,750          155          --          --           --              --
 Vice President, General  1997   168,381           77          --          --      275,000 (4)      23,533 (7)
 Counsel and Secretary    1996    15,000 (6)       --          --          --           --           6,380 (7)
Dan D. Line.............  1998    95,000          155     562,129          --       40,000              --
 Vice President, Channel  1997    75,000          171     306,254          --      206,250 (8)       2,686 (2)
 Marketing and Sales      1996    74,157          609     184,734          --      100,000          2,2581 (2)
 Operations
Patric R. Olenczak .....  1998   132,033 (9)       --      53,706          --           --          16,627 (10)
 Vice President and       1997    59,487           --          --          --       50,000          22,646 (12)
 Managing                 1996        -- (11)      --          --          --           --              --
 Director, Europe,        
 Middle East
 and Africa
James K.R. Souders......  1998   132,500        3,179     180,695          --      200,000          81,264 (13)
 Executive Vice           1997    71,000          155     136,270          --      192,500 (14)      1,447 (2)
 President,               1996    66,105          650     166,216          --      100,000           2,754 (2)
 Sales and Marketing      
R. Jay West.............  1998    70,000          142     322,653          --       50,750              --
 Vice President, America  1997    65,244           77      58,215 (15)     --       24,250 (16)         --
 Sales                    1996        -- (17)      --          --          --           --              --
</TABLE>
- --------
(1) Messrs. Johnson and Vento resigned as Co-Chief Executive Officers of OSI
    in February 1996, but resumed those offices in April 1997 following the
    resignation of then Chief Executive Officer, Joseph T. Ambrozy. In fiscal
    year 1998, both served without compensation.
(2) Includes matching and other contributions made by OSI for the benefit of
    the named individuals under our 401(k) savings plan.
(3) Mr. Allen joined OSI as Vice President and Chief Financial Officer in July
    1996.
(4) Includes grants of options to purchase 110,000 shares pursuant to the
    April 19, 1997, repricing of an option originally granted earlier in
    fiscal year 1997.
(5) Includes a relocation expense reimbursement of $114,358.
(6) Mr. Cardman joined OSI as Vice President, General Counsel and Secretary in
    May 1996.
 
                                      12
<PAGE>
 
 (7) Included in a total relocation expense reimbursement of $29,913.
 (8) Includes grants of options to purchase 161,250 shares pursuant to the
     April 19, 1997, repricing of options to purchase 141,250 shares and
     20,000 shares originally granted in fiscal year 1996 and earlier in
     fiscal year 1997, respectively.
 (9) Mr. Olenczak is compensated in French francs. His compensation is
     translated to U.S. dollars for the purposes of this table using an
     average conversion rate for the period and includes $10,055 as an
     adjustment for fluctuation of the currency exchange rate.
(10) Includes a travel expense reimbursement of $16,627.
(11) Mr. Olenczak joined OSI as its Managing Director Europe, Middle East and
     Africa on January 16, 1997.
(12) Includes relocation expense reimbursement of $22,646.
(13) Includes a relocation expense reimbursement of $81,264.
(14) Includes grants of options to purchase 192,500 shares, pursuant to the
     April 19, 1997, repricing of options to purchase 27,500 shares originally
     granted in fiscal year 1995, 100,000 shares originally granted in fiscal
     year 1996 and 20,000 originally granted earlier in fiscal year 1997.
(15) Includes $30,000 advanced against sales commissions.
(16) Includes grants of options to purchase 5,000 shares pursuant to the April
     19, 1997, repricing of options which were originally granted in fiscal
     year 1996.
(17) Mr. West joined OSI as Director, Sales South, in July 1996.
 
                                      13
<PAGE>
 
                       OPTION GRANTS IN FISCAL YEAR 1998
 
  The following table has information about options that were granted to the
people named in the Summary Compensation Table during our fiscal year ended
June 30, 1998.
 
                       OPTION GRANTS IN FISCAL YEAR 1998
 
                               INDIVIDUAL GRANTS
 
<TABLE>
<CAPTION>
                                                                                   POTENTIAL
                                                                              REALIZABLE VALUE AT
                                                                                ASSUMED ANNUAL
                         NUMBER OF    PERCENTAGE OF                             RATES OF STOCK
                         SECURITIES   TOTAL OPTIONS                           PRICE APPRECIATION
                         UNDERLYING     GRANTED TO     EXERCISE               FOR OPTION TERM (1)
                          OPTIONS       EMPLOYEES      PRICE PER   EXPIRATION -------------------
NAME                      GRANTED     IN FISCAL 1998 SHARE (2) (3)    DATE       5%        10%
- ----                     ----------   -------------- ------------- ---------- --------- ---------
<S>                      <C>          <C>            <C>           <C>        <C>       <C>
Tom L. Johnson..........       --            --             --            --         --        --
Richard G. Vento........       --            --             --            --         --        --
David M. Allen..........       --            --             --            --         --        --
Dan D. Line.............   40,000(4)       3.10%         8.375      12/31/07    210,680   533,904
James K.R. Souders......  200,000(5)      15.51%         8.375      12/31/08  1,189,819 3,103,971
Philip N. Cardman.......       --            --             --            --         --        --
Patric R. Olenczak......       --            --             --            --         --        --
R. Jay West.............   35,000(4)       2.72%         7.000       7/19/07    154,079   390,467
                           15,750(4)       1.22%         6.875       8/12/07     68,098   172,572
</TABLE>
- --------
(1) Potential realizable value is based on the assumption that Common Stock
    appreciates at the rate shown (compounded annually) from the date of grant
    until the ten year option term expires. These numbers are calculated based
    on SEC requirements and do not reflect our estimate of future stock price
    growth.
(2) Options have an exercise price equal to the fair market value of Common
    Stock on the date of grant, as determined by reference to the closing
    price reported on The Nasdaq National Market on the date of grant.
(3) The exercise price may be paid in cash, promissory note, by delivery of
    already-owned shares (subject to certain conditions) or under a cashless
    exercise procedure where the optionee gives irrevocable instructions to a
    broker to sell the purchased shares and to remit to OSI, out of the sale
    proceeds, the exercise price plus applicable withholding taxes.
(4) Options are exercisable as follows: 1/4 of the shares are exercisable one
    year from the date of grant and 1/48 of the shares are exercisable each
    month thereafter, with full vesting occurring on the fourth anniversary of
    the date of grant.
(5) Options are exercisable as follows: 1/7 of the shares are exercisable one
    year from the date of grant and 1/84 of the shares are exercisable each
    month thereafter, with full vesting occurring on the seventh anniversary
    of the date of grant.
 
                                      14
<PAGE>
 
                AGGREGATED OPTION EXERCISES IN LAST FISCAL YEAR
                       AND FISCAL YEAR-END OPTION VALUES
 
  The following table has information about the exercise of stock options in
the last fiscal year by the people named in the Summary Compensation Table and
the value of options held by them as of June 30, 1998.
 
<TABLE>
<CAPTION>
                                                    NUMBER OF SECURITIES
                                                   UNDERLYING UNEXERCISED     VALUE OF UNEXERCISED
                                                         OPTIONS AT           IN- THE-MONEY OPTIONS
                           SHARES                     JUNE 30, 1998(#)       AT FISCAL YEAR END $(2)
                         ACQUIRED ON    VALUE     ------------------------- -------------------------
NAME                      EXERCISE*  REALIZED$(1) EXERCISABLE UNEXERCISABLE EXERCISABLE UNEXERCISABLE
- ----                     ----------- ------------ ----------- ------------- ----------- -------------
<S>                      <C>         <C>          <C>         <C>           <C>         <C>
Tom L. Johnson..........       --           --           --           --           --           --
Richard G. Vento........       --           --           --           --           --           --
David M. Allen..........   14,896       46,550       53,854       96,250       75,912      195,651
Dan D. Line.............       --           --      182,396      141,353      677,038      330,936
James K.R. Souders......   49,565      281,034      128,542      298,958      349,702      329,336
Philip N. Cardman.......       --           --       71,876       93,124      124,898      191,352
Patric R. Olenczak......       --           --       15,104       34,896       30,924       78,451
R. Jay West.............       --           --        8,010       66,990       20,137       65,489
George F. Schmitt.......       --           --       40,625       21,875           --           --
Dr. Kornel Terplan......       --           --        7,292        5,208           --           --
</TABLE>
- --------
(1) Market value of Common Stock at the exercise date minus the exercise
    price.
(2) Market value of Common Stock at fiscal year-end minus the exercise price.
 
EMPLOYMENT CONTRACTS AND CHANGE-IN-CONTROL ARRANGEMENTS
 
  In June of 1996, David M. Allen entered into an agreement with OSI under
which he was to receive a base salary of $175,000 per year to be reviewed
annually. If Mr. Allen's employment is involuntarily terminated other than for
cause, his base salary as then in effect will continue to be paid for a period
of one year from his termination date. No unvested stock options will be
vested.
 
  In May of 1996, Philip N. Cardman entered into an agreement with OSI under
which he was to receive a base salary of $155,000 per year to be reviewed
annually. If Mr. Cardman's employment is involuntarily terminated other than
for cause, his base salary as then in effect will continue to be paid for a
period of two years from his termination date. In addition, if Mr. Cardman's
employment is voluntarily terminated, his base salary as then in effect will
continue to be paid for a period of eighteen months from his termination date.
No unvested stock options will be vested.
 
  In September of 1997, Jerry P. Johnson entered into an agreement with OSI
under which he was to receive a base salary of $175,000 per year to be
reviewed annually. If Mr. Johnson's employment is involuntarily terminated
other than for cause, his base salary as then in effect will continue to be
paid for a period of one year from his termination date. In addition, options
that would have vested over the period ending one year from his termination
date will be vested as of the date of termination.
 
  In December of 1996, Patrick R. Olenczak entered into an agreement with OSI
under which he was to receive a base salary of $160,000 per year. His base
salary is to be paid in French francs at an exchange rate to be determined on
January 1 of each year in the absence of more than 5% variance in the
applicable rate, in which case interim adjustments will be made. If Mr.
Olenczak's employment is involuntarily terminated other than for cause, his
base salary as then in effect will continue to be paid for a period of one
year from his termination date. No unvested stock options will be vested. In
addition, Mr. Olenczak has agreed that he will not compete with the activities
of OSI for a period of one year following his termination.
 
  In January of 1998, James K.R. Souders entered into an agreement with OSI
under which he is to receive a base salary of $175,000 per year to be reviewed
annually. The term of the agreement is two years. If the
 
                                      15
<PAGE>
 
agreement is not renewed within 30 days of its annual anniversary date, or if
Mr. Souders' employment is terminated for any reason, his base salary will be
paid for the then remaining term of the agreement. In addition options that
would have vested over the then remaining term of the agreement will be
vested. If his employment is involuntarily terminated at any time within 24
months of January 1998, OSI will also absorb any costs associated with the
sale of Mr. Souders' residence in California.
 
COMPENSATION OF DIRECTORS
 
  Members of the Board do not receive compensation for their services as
directors. Our 1995 Director Option Plan provides stock options to be granted
to nonemployee directors ("Outside Directors"). Each Outside Director
automatically receives an option to purchase 50,000 shares ("First Option") on
the date he becomes an Outside Director. Thereafter, if he has then served on
the Board for at least six months, the Outside Director is automatically
granted an option to purchase 12,500 shares at the first meeting of the Board
after each year's Annual Meeting of Stockholders. The options can be exercised
only while the Outside Director remains a director. The First Option vests as
to 25% of the shares on the first anniversary of the grant date and at the
rate of 1/48th of the shares per month thereafter. Subsequent option grants
vest as to 50% of the shares six months after the date of grant and as to
1/12th of the shares per month thereafter.
 
COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION
 
  The Compensation Committee ("Committee") consists of Messrs. Schmitt,
Shantz, Terplan, Johnson and Vento.
 
  Mr. Johnson became Co-Chief Executive Officer of OSI in April 1997. Mr.
Johnson also was Co-Chief Executive Officer from June 1989 until February
1996, President from May 1991 until June 1994, Chief Financial Officer from
July 1989 until November 1993 and Vice President, Product Development, from
July 1990 until July 1995.
 
  Mr. Vento became Co-Chief Executive Officer of OSI in April 1997. Mr. Vento
was Co-Chief Executive Officer from June 1989 until February 1996, President
from June 1994 until July 1995 and Vice President, Sales and Marketing, from
July 1990 to June 1994.
 
REPORT OF THE COMPENSATION COMMITTEE
 
  The Committee reviews and approves OSI's executive compensation policies.
The Committee also administers our various incentive plans, including the 1994
Stock Option Plan and the 1995 Employee Stock Purchase Plan, sets compensation
policies applicable to our executive officers and evaluates the performance of
those officers. Compensation for our executive officers, including base salary
levels, potential bonuses and stock option grants are determined by the
Committee at the beginning of the fiscal year. Below is a description of the
policies and rationale the Committee applied in setting compensation for OSI's
executive officers during the fiscal year ended June 30, 1998. Messrs. Johnson
and Vento served as Co-Chief Executive Officers for fiscal year 1998 without
compensation.
 
 Compensation Philosophy
 
  The underlying philosophy of our executive compensation is to maximize
stockholder value over time. The primary goal of the executive compensation
program is, therefore, to closely align the interests of our executive
officers with those of our stockholders. To achieve this end, we attempt to
(a) offer compensation opportunities that attract and retain executives whose
abilities are critical to our long-term success, (b) motivate individuals to
perform at their highest level and reward outstanding achievement, (c)
maintain a portion of an executive's total compensation at risk, tied to
achieving financial, organizational and management performance goals, and (d)
encourage executives to manage from the perspective of owners with an equity
stake in OSI. The Committee currently uses base salary, cash incentives and
stock options to meet these goals.
 
                                      16
<PAGE>
 
 Base Salary and Commissions
 
  We use base salary primarily as a device to attract, motivate, reward and
retain highly skilled executives. The Committee reviewed and approved fiscal
1998 base salaries for the executive officers at the beginning of the fiscal
year. Salaries were set based on the executive officer's job responsibilities,
level of experience, individual performance, contribution to our business, our
financial performance for the past year and recommendations from management.
The Committee also took into account the salaries for similar positions at
comparable companies, based on the industry experience of the Committee
members and on input from independent compensation specialists it had hired to
assist in the process. In reviewing base salaries, the Committee focused
significantly on each executive officer's prior performance with OSI and
expected contribution to our future success. It also focused on a group of
comparable companies in the high technology sector, as identified by its
independent consultants. In making its decisions, the Committee exercised its
discretion and judgment using the factors described above. No specific formula
was applied to determine the weight of each factor.
 
  Commissions are paid only to those of our executive officers who have a
direct responsibility for sales. In setting commission rates for sales
executives, the Committee evaluated both what we had done in the past and the
approach taken by comparable high technology companies. Here again, comparable
companies were identified based on the industry experience of each individual
Committee member and on information provided by the independent compensation
specialists.
 
 Annual Cash Incentives
 
  Bonuses for executive officers are based on qualitative and quantitative
factors. They are intended to motivate and reward executive officers by
directly linking the amount of their bonus to specific OSI-based performance
targets. The factors are also intended to reflect the Committee's belief that
a portion of each executive's compensation should be contingent on our
performance. To carry out this philosophy, at the beginning of the fiscal year
the Board reviewed and approved the financial budget for the year and
established performance targets. The Committee then set target bonuses for
each executive officer as a percentage of the officer's base salary. Bonuses
were dependent on the achievement of performance targets which were tied to
different indicators of performance such as our operating results. The
Committee evaluated the completion of performance targets and approved a
performance rating relative to the goals completed. Scoring was influenced by
the Committee's perception of the relative importance of the various corporate
goals. The Committee believes that this bonus structure provides an excellent
link between our earnings performance and the incentives that are received by
our executives.
 
 Stock Options
 
  The Committee provides executive officers with long-term incentive
compensation through grants of stock options under OSI's 1994 Stock Option
Plan. Stock options provide executive officers with an opportunity to purchase
and maintain an equity interest in OSI and thereby share in any appreciation
in the value of our Common Stock. The Committee believes that stock options
directly motivate an executive to maximize long-term stockholder value. In
addition, vesting periods are set to that encourage key executives to stay
with OSI. To date, all options granted to executive officers have been at fair
market value on the date of grant. Option grants are subjective, but are based
on factors such as the executive's relative position, responsibilities at OSI,
individual performance over the previous fiscal year and anticipated
contribution to the attainment of our long-term strategic goals. Stock options
granted in prior years are also taken into consideration. The Committee views
stock option grants as an important component of its long-term, performance-
based compensation philosophy.
 
SECTION 162(M)
 
  The Board has considered the potential future effects of Section 162(m) of
the Code on the compensation paid to our executive officers. Section 162(m)
disallows a public company from taking tax deductions for compensation paid to
an executive officer named in the Proxy Statement to the extent the
compensation is more
 
                                      17
<PAGE>
 
than $1 million in any taxable year. The only exception is if the compensation
is performance-based. We have adopted a policy that, where reasonably
practicable, we will seek to qualify the variable compensation we pay to our
executive officers for an exemption from the deductibility limitations of
Section 162(m).
 
                                          Respectfully submitted by:
 
                                          Tom L. Johnson
                                          George F. Schmitt
                                          Jonathan B. Shantz
                                          Dr. Kornel Terplan
                                          Richard G. Vento
 
                                      18
<PAGE>
 
PERFORMANCE GRAPH
 
  The following graph compares the annual percentage change in the cumulative
return to the stockholders of our Common Stock with the cumulative return of
The Nasdaq Stock Market--US Index and of the Hambrecht & Quist Communications
Index. The period shown begins December 1, 1995, the date we began reporting
under the Securities Exchange Act of 1934, as amended and, ending on June 30,
1998. Returns are weighted based on market capitalization at the beginning of
each fiscal year.
 
                  COMPARISON OF 31-MONTH CUMULATIVE RETURN ON
          AMONG OBJECTIVE SYSTEMS INTEGRATORS, INC. THE NASDAQ STOCK
        MARKET-US INDEX AND THE HAMBRECHT & QUIST COMMUNICATIONS INDEX
 
                                        Cumulative Total Return
                           --------------------------------------------------
                            12/1/95       6/96         6/97             6/98
OBJECTIVE SYSTEMS
INTEGRATORS, INC.            100.00     192.11        45.39            38.82
NASDAQ STOCK MARKET (U.S.)   100.00     113.03       137.43           181.40
HAMBRECHT & QUIST
COMMUNICATIONS               100.00     110.00       109.94           133.14
 
  The graph assumes that on December 1, 1995, $100 was invested in each of our
Common Stock, The Nasdaq Stock Market--US Index and the Hambrecht & Quist
Communications Index. It also assumes that all dividends were reinvested. No
dividends have been declared or paid on our Common Stock. Stockholder returns
over the indicated period should not be considered indicative of future
stockholder returns.
 
  The information contained above under the captions "Report of the
Compensation Committee" and "Performance Graph" will not be deemed "soliciting
material" or have been "filed" with the SEC, nor will that information be
incorporated by reference into any future filing under the Securities Act of
1993 (the "Securities Act") or the Exchange Act, except to the extent that we
specifically incorporate it by reference.
 
CERTAIN TRANSACTIONS
 
  In September 1995, OSI entered into a business relationship with (a) Japan
Associated Finance Co., Ltd. ("JAFCO") and (b) Quantum Industrial Partners
LDC, the principal operating subsidiary of Quantum Industrial Holdings Ltd.,
an investment fund advised by Soros Fund Management, a private investment firm
owned by George Soros and S-C Phoenix Holdings, L.L.C., an investment vehicle
owned by affiliates of Mr. Soros and Dr. Purnendu Chatterjee
("Chatterjee/Soros") principally for the development of OSI's business in
Japan, India and Southeast Asia. (JAFCO and Chatterjee/Soros are collectively
referred to as "Investors"). In conjunction with this relationship, Messrs.
Vento and Johnson, each sold 909,091 shares of Common Stock to the investors.
Under the terms of a Shareholder Rights Agreement among OSI, Mr. Johnson, Mr.
Vento and the Investors ("Shareholder Rights Agreement"), the Investors had
certain Board observation rights which have since lapsed. Mr. Schmitt was
originally elected to the Board in connection with those rights. Under the
Shareholder Rights
 
                                      19
<PAGE>
 
Agreement, at the request of the Investors, OSI will register for public
resale the shares of Common Stock that the Investors hold. In addition, if OSI
proposes to register shares of Common Stock for sale to the public, the
Investors and Messrs. Vento and Johnson can (subject to quantity limitations
determined by the underwriters if the offering involves an underwriting)
request that we register for public resale their shares of Common Stock. The
Investors together may include shares in the registration totaling at least
one-third of the aggregate shares included by the Investors and Messrs. Vento
and Johnson. All fees and expenses incurred in connection with registration
will be borne by OSI, except for underwriting discounts and commissions
relating to shares sold, which will be borne by the seller. OSI and the
sellers have agreed to indemnify each other against certain liabilities in
connection with registration, including liabilities under the Securities Act.
 
  In April 1998 OSI entered into a short term loan agreement with James K.R.
Souders, OSI's Executive Vice President, Sales and Marketing, in the amount of
$400,000 to facilitate his relocation to California. The loan was fully
secured, no interest accrued and it was repaid in full in June of 1998.
 
  We believe that these transactions were made on terms no less favorable to
OSI than could have been obtained from unaffiliated third parties. All future
transactions, including loans, between OSI and its officers, directors,
principal stockholders and their affiliates, will be approved by a majority of
the Board, including a majority of independent and disinterested outside
directors, and will continue to be on terms no less favorable to OSI than
could be obtained from unaffiliated third parties.
 
SECTION 16(A) BENEFICIAL OWNERSHIP REPORTING COMPLIANCE
 
  Section 16(a) of the Exchange Act requires our executive officers and
directors, and people who own more than ten percent of a registered class of
our equity securities, to file reports of ownership and changes in ownership
with the SEC and the National Association of Securities Dealers, Inc.
Executive officers, directors and greater-than-ten-percent stockholders are
required by SEC regulation to furnish us with copies of all Section 16(a)
forms that they file. Based on our review of the forms we have received, or
written representations from various of our reporting persons, we believe that
our executive officers and directors complied with all applicable filing
requirements in fiscal 1998, with the following exceptions: Mr. Johnson was
late in reporting on a Form 5 two transactions involving a distribution of
shares from a limited liability company Mr. Johnson controls to himself and
three individuals and entities whose holdings Mr. Johnson reports along with
his own holdings. The limited liability company which received these shares
was also late in reporting this transaction on a Form 4. Finally, Mr. Johnson
was also late in reporting on a Form 4 a transfer of some of the distributed
shares to two estate planning trusts. Mr. Vento was late in reporting on a
Form 5 two transactions involving a distribution of shares from a limited
liability company Mr. Vento controls to himself and four individuals and
entities whose holdings Mr. Vento reports along with his own holdings. The
limited liability company which received these shares was also late in
reporting this transaction on a Form 4. Finally, Mr. Vento was late in
reporting on a Form 5 a transfer to two charitable trusts and was late in
reporting on a Form 4 some of the distributed shares to two estate planning
trusts.
 
                                 OTHER MATTERS
 
  We know of no other matters to be submitted at the Annual Meeting. If any
other matters properly come before the Annual Meeting, it is the intention of
the people named in the enclosed form of Proxy to vote the shares they
represent as the Board recommends.
 
THE BOARD OF DIRECTORS
 
Dated: October 16, 1998
 
                                      20
<PAGE>
 
                      OBJECTIVE SYSTEMS INTEGRATORS, INC.
 
                       1995 EMPLOYEE STOCK PURCHASE PLAN
                     (AS AMENDED THROUGH JANUARY 17, 1998)
 
  The following is the 1995 Employee Stock Purchase Plan of Objective Systems
Integrators, Inc.
 
 1. PURPOSE. The purpose of the Plan is to provide employees of Objective
    Systems Integrators, Inc. and its Designated Subsidiaries with an
    opportunity to purchase OSI's Common Stock through accumulated payroll
    deductions. It is intended that this Plan qualify as an "Employee Stock
    Purchase Plan" under Section 423 of the Internal Revenue Code of 1986, as
    amended. The provisions of the Plan, accordingly, will be construed to
    extend and limit participation in a manner consistent with the
    requirements of that Section of the Code.
 
 2. DEFINITIONS.
 
  (a) BOARD. The Board of Directors of Objective Systems Integrators, Inc.
 
  (b) CODE. The Internal Revenue Code of 1986, as amended.
 
  (c) COMMON STOCK. The Common Stock of Objective Systems Integrators, Inc..
 
  (d) OSI. Objective Systems Integrators, Inc. and any of its Designated
      Subsidiaries.
 
  (e) COMPENSATION. All of a Participant's W-2 compensation.
 
  (f) DESIGNATED SUBSIDIARIES. Each Subsidiary which has been designated by
      the Board, from time to time and in its sole discretion, as eligible to
      participate in the Plan.
 
  (g) EMPLOYEE. An individual who is employed by OSI for tax purposes and
      whose customary employment with OSI is at least 20 hours per week and
      at least five months in any calendar year. For purposes of the Plan,
      the employment relationship will be treated as continuing intact while
      an individual is on sick leave or other leave of absence approved by
      OSI. If the period of leave exceeds 90 days and the individual's right
      to reemployment is not guaranteed either by statute or by contract, the
      employment relationship will be deemed to have ended on the 91st day of
      the leave.
 
  (h) ENROLLMENT DATE. The first day of each Offering Period.
 
  (i) EXERCISE DATE. The last day of each Purchase Period.
 
  (j) FAIR MARKET VALUE. As of any date, the value of Common Stock determined
      as follows:
 
    (1) If the Common Stock is listed on an established stock exchange or a
        national market system, Fair Market Value will be the closing sale
        price (or the mean of the closing bid and asked prices, if no sales
        were reported), as quoted on the exchange (or the exchange with the
        greatest volume of trading in Common Stock) or system on the date
        of the determination, as reported in The Wall Street Journal or
        such other source as the Board deems reliable, or;
 
    (2) If the Common Stock is quoted on the Nasdaq National Market of the
        National Association of Securities Dealers, Inc. Automated
        Quotation System (but not on the Nasdaq National Market thereof) or
        is regularly quoted by a recognized securities dealer but selling
        prices are not reported, Fair Market Value will be the mean of the
        closing bid and asked prices for the Common Stock on the date of
        the determination, as reported in The Wall Street Journal or such
        other source as the Board deems reliable, or;
 
    (3) In the absence of an established market for the Common Stock, Fair
        Market Value will be determined in good faith by the Board.
 
    (4) For purposes of the Enrollment Date for the first Offering Period,
        Fair Market Value will be the price to the public as set forth in
        the final Prospectus included in the Registration Statement (Form
 
                                      A-1
<PAGE>
 
       S-1) filed with the Securities and Exchange Commission for the
       initial public offering of OSI's Common Stock.
 
  (k) OFFERING PERIOD. The period of approximately 24 months during which an
      option granted under the Plan may be exercised, beginning on the first
      Trading Day on or after May 1 and November 1 of each year and ending on
      the last Trading Day of the period two years later. The first Offering
      Period will begin on the effective date of OSI's initial public
      offering of Common Stock registered with the Securities and Exchange
      Commission and will end on the last Trading Day on or before October
      31, 1997. The duration and timing of Offering Periods may be changed
      under Section 4.
 
  (l) PLAN. This Employee Stock Purchase Plan.
 
  (m) PURCHASE PRICE. An amount equal to 85% of the Fair Market Value of a
      share of Common Stock on the Enrollment Date or on the Exercise Date,
      whichever is lower.
 
  (n) PURCHASE PERIOD. The approximately six-month period beginning after one
      Exercise Date and ending with the next Exercise Date, except that the
      first Purchase Period of an Offering Period will begin on the
      Enrollment Date and end with the next Exercise Date.
 
  (o) RESERVES. The number of shares of Common Stock covered by each option
      under the Plan which have not yet been exercised plus the number of
      shares of Common Stock which have been authorized for issuance under
      the Plan but not yet placed under option.
 
  (p) SUBSIDIARY. A corporation, domestic or foreign, of which not less than
      50% of the voting shares are held by OSI or a Subsidiary, whether or
      not that corporation now exists or is later organized or acquired by
      OSI or a Subsidiary.
 
  (q) TRADING DAY. A day on which national stock exchanges and the Nasdaq
      System are open for trading.
 
 3. ELIGIBILITY.
 
  (a) Any Employee who is employed by OSI on a given Enrollment Date is
      eligible to participate in the Plan.
 
  (b) Any provisions of the Plan to the contrary notwithstanding, no Employee
      will be granted an option under the Plan (1) if, immediately after the
      grant, the Employee (or any other person whose stock would be
      attributed to the Employee under Section 424(d) of the Code) would own
      capital stock of OSI and/or hold outstanding options to purchase such
      stock possessing five percent or more of the total combined voting
      power or value of all classes of OSI's capital stock or that of any
      Subsidiary, or (2) which permits the Employee's rights to purchase
      stock under all employee stock purchase plans of OSI and its
      subsidiaries to accrue at a rate which exceeds $25,000 worth of stock
      (determined at the fair market value of the shares at the time the
      option is granted) for each calendar year in which the option is
      outstanding at any time.
 
 4. OFFERING PERIODS. The Plan will be implemented by consecutive, overlapping
    Offering Periods, with a new Offering Period beginning on the first
    Trading Day on or after May 1 and November 1 each year, or on such other
    date as the Board determines, and continuing thereafter until terminated
    in accordance with Section 19. The first Offering Period will begin on the
    Effective Date of OSI's initial public offering of Common Stock registered
    with the Securities and Exchange Commission. The Board may change the
    duration of Offering Periods (including their commencement dates) for
    future offerings without shareholder approval if the change is announced
    at least five days before the scheduled beginning of the first Offering
    Period to be affected.
 
 5. PARTICIPATION.
 
  (a) An eligible Employee may become a Participant in the Plan (a
      "Participant") by completing a subscription agreement in the form of
      Exhibit A to this Plan and filing it with OSI's payroll office before
      the applicable Enrollment Date.
 
                                      A-2
<PAGE>
 
  (b) Payroll deductions for Participants will begin on the first payroll
      after the Enrollment Date and will end on the last payroll in the
      Offering Period to which the authorization is applicable, unless sooner
      terminated by a Participant under Section 10.
 
 6. PAYROLL DEDUCTIONS.
 
  (a) At the time a Participant files a subscription agreement, the
      Participant will elect to have payroll deductions made on each pay day
      during the Offering Period. Deductions may not exceed 15% of the
      Compensation which the Participant receives on each pay day. The
      aggregate of all payroll deductions during an Offering Period may not
      exceed 15% of the Participant's Compensation during the Offering
      Period.
 
  (b) Payroll deductions will be credited to a Participant's account under
      the Plan and will be withheld in whole percentages only. Participants
      may not make any additional payments into their accounts.
 
  (c) Participants may stop participating in the Plan as provided in Section
      10. They may also increase or decrease their rate of payroll deductions
      once during a Purchase Period by filing a new subscription agreement
      with OSI authorizing the change. The Board may, in its discretion,
      limit the number of rate changes during any Purchase Period. Rate
      changes will be effective with the first full payroll period that
      begins at least five business days after OSI receives the new
      subscription agreement unless OSI elects to process a given change more
      quickly. Subscription agreements will remain in effect for successive
      Offering Periods unless terminated under Section 10.
 
  (d) Notwithstanding the foregoing, to the extent necessary to comply with
      Section 423(b)(8) of the Code and Section 3(b) of this Plan, a
      Participant's payroll deductions may be decreased to 0% during a
      Purchase Period ("Current Purchase Period") if the sum of all payroll
      deductions previously used to purchase stock under the Plan in an
      earlier Purchase Period ending during the same calendar year, plus all
      payroll deductions accumulated for the Current Purchase Period, equals
      $21,250. Thereafter, payroll deductions will recommence at the
      beginning of the first Purchase Period which ends in the next calendar
      year and at the rate in the Participant's subscription agreement,
      unless terminated by the Participant under Section 10.
 
  (e) At the time the option is exercised, in whole or in part, or at the
      time some or all of the Common Stock issued under the Plan is disposed
      of, Participants must make adequate provision for OSI's federal, state,
      or other tax withholding obligations, if any, which arise on the
      exercise of the option or the disposition of the Common Stock. OSI may,
      but will not be obligated to, withhold from a Participant's
      compensation at any time the amount necessary for it to meet applicable
      withholding obligations, including withholding required to make
      available to OSI any tax deductions or benefits attributable to the
      Participant's sale or early disposition of Common Stock.
 
 7. GRANT OF OPTION. On the Enrollment Date of each Offering Period, eligible
    Employees participating in the Offering Period will be granted an option
    to purchase on each Exercise Date during the Offering Period (and at the
    applicable Purchase Price) up to a whole number of shares of Common Stock
    determined by dividing the payroll deductions accumulated by the Employee
    before the Exercise Date and retained in the Employee's account as of the
    Exercise Date, by the applicable Purchase Price. The preceding sentence
    notwithstanding, (a) no Participant can purchase during a Purchase Period
    more than a number of shares determined by dividing $12,500 by the Fair
    Market Value of a share of Common Stock on the Enrollment Date, and (b)
    all purchases will be subject to the limitations in Sections 3(b) and 12.
    Exercise of the option will occur as provided in Section 8 (unless the
    Participant has withdrawn under Section 10) and will expire on the last
    day of the Offering Period.
 
 8. EXERCISE OF OPTION. Unless a Participant withdraws from the Plan under
    Section 10, the option to purchase shares will be exercised automatically
    on the Exercise Date. The maximum number of whole shares subject to option
    will be purchased for each Participant at the applicable Purchase Price
    with the accumulated payroll deductions in the Participant's account. No
    fractional shares will be purchased. Any payroll
 
                                      A-3
<PAGE>
 
   deductions accumulated in the Participant's account which are insufficient
   to purchase a whole share will be retained for the subsequent Purchase
   Period or Offering Period, subject to earlier withdrawal under Section 10.
   Any other money left over in a Participant's account after the Exercise
   Date will be returned. During a Participant's lifetime, only the
   Participant can exercise the option to purchase shares under the Plan.
 
 9. DELIVERY. As promptly as practicable after each Exercise Date on which a
    purchase of shares occurs, OSI will arrange for the delivery to each
    Participant, as appropriate, of a certificate representing the shares
    purchased on exercise of the option.
 
10. WITHDRAWAL AND TERMINATION OF EMPLOYMENT.
 
  (a) At any time, Participants may withdraw all but not less than all of the
      payroll deductions credited to their account and not yet used to
      exercise an option under the Plan. Withdrawal will be effected by
      giving OSI notice in the form of Exhibit B. All of the payroll
      deductions credited to a Participant's account will be paid to the
      Participant promptly after OSI receives notice of withdrawal, the
      Participant's option for the Offering Period will automatically be
      terminated and no further payroll deductions for the purchase of shares
      will be made for the Offering Period. If a Participant withdraws from
      an Offering Period, payroll deductions will not resume at the beginning
      of the next Offering Period unless the Participant has delivered a new
      subscription agreement to OSI.
 
  (b) On ceasing to be an Employee for any reason, Participants are deemed to
      have withdrawn from the Plan. The payroll deductions credited to the
      Participant's account during the Offering Period but not yet used to
      exercise the option will be returned to the Participant (or, in the
      case of the Participant's death, to the person entitled to them under
      Section 14) and the Participant's option will automatically be
      terminated. The preceding sentences notwithstanding, Participants who
      receive payment in lieu of termination notice will be treated as
      continuing to be Employees for their customary number of hours per week
      of employment during the period in which they are subject to the
      payment in lieu of notice.
 
11. INTEREST. No interest will accrue on the payroll deductions of
    Participants.
 
12. COMMON STOCK.
 
  (a)  The maximum number of shares of Common Stock that will be made
      available for sale under the Plan is 1,487,500, subject to adjustment
      on changes in OSI's capitalization as provided in Section 18. If, on
      any Exercise Date, the number of shares for which options are to be
      exercised exceeds the number of shares then available under the Plan,
      OSI will make a pro rata allocation of the shares remaining available
      for purchase in as uniform a manner as practicable and as it determines
      to be equitable.
 
  (b) Participants will have no interest or voting right in shares covered by
      their options until the options have been exercised.
 
  (c) Shares to be delivered to Participants under the Plan will be
      registered in the name of each Participant or in the name of each
      Participant and his or her spouse.
 
13. ADMINISTRATION. The Plan will be administered by the Board or a committee
    of the Board duly appointed by the Board (either, as applicable, being
    referred to as the "Board"). The Board will have full and exclusive
    discretionary authority to construe, interpret and apply the terms of the
    Plan, to determine eligibility and to adjudicate all disputed claims filed
    under the Plan. Every finding, decision or determination made by the Board
    will, to the fullest extent permitted by law, be final and binding on all
    parties.
 
14. DESIGNATION OF BENEFICIARIES.
 
  (a) A Participant may file a written designation of a beneficiary who is to
      receive the shares and cash, if any, from the Participant's account if
      the Participant dies after an Exercise Date but before the shares and
      cash have been delivered to the Participant. A Participant may also
      file a written designation of a
 
                                      A-4
<PAGE>
 
     beneficiary who is to receive any cash from the Participant's account if
     the Participant dies before the option is exercised. If a Participant is
     married and the designated beneficiary is not his or her spouse, spousal
     consent will be required for these designations to be effective.
 
  (b) Participants may change their designated beneficiary at any time by
      notice to OSI. If a Participant dies and there is no validly designated
      beneficiary who is living at that time, OSI will deliver the shares
      and/or cash to the executor or administrator of the Participant's
      estate. If no executor or administrator has been appointed to OSI's
      knowledge, then OSI, in its discretion, may deliver the shares and/or
      cash to the spouse or to any one or more of the Participant's
      dependents or relatives. If no spouse, dependent or relative is known
      to OSI, then OSI, in its discretion, may deliver the shares and/or cash
      to such other person as OSI designates.
 
15. TRANSFER. Participants may not assign, transfer, pledge or otherwise
    disposed of in any way (other than by will, the laws of descent and
    distribution or as provided in Section 14) either payroll deductions
    credited to their account or any rights with regard to the exercise of
    options or the receipt of shares under the Plan. Any attempt at
    assignment, transfer, pledge or other disposition will be without effect,
    except that OSI may treat the attempt as an election to withdraw from an
    Offering Period under Section 10.
 
16. USE OF FUNDS. All payroll deductions received or held by OSI under the
    Plan may be used by OSI for any corporate purpose. OSI will not be
    obligated to segregate payroll deductions.
 
17. REPORTS. Individual accounts will be maintained for each Participant.
    Statements of account will be given to each Participant at least once per
    year,. These statements will set forth the amounts of payroll deductions,
    the Purchase Price, the number of shares purchased and the remaining cash
    balance, if any.
 
18. ADJUSTMENTS ON CHANGES IN CAPITALIZATION, DISSOLUTION, LIQUIDATION, MERGER
    OR ASSET SALE.
 
  (a) Subject to any required action by OSI's stockholders, the Reserves and
      the price per share of Common Stock covered by unexercised options
      under the Plan will be proportionately adjusted for any change in the
      number of issued shares of Common Stock as a result of a stock split,
      reverse stock split, stock dividend, combination or reclassification of
      the Common Stock, or any other change in the number of shares of Common
      Stock effected without OSI receiving consideration. For purposes of the
      Plan, however, the conversion of any convertible securities of OSI will
      not be deemed to have been "effected without receipt of consideration".
      This adjustment will be made by the Board, whose determination will be
      final and binding. Except as provided in the Plan, no issuance by OSI
      of any class of stock or securities convertible into shares of any
      class of stock, will affect (and no adjustment by reason of such an
      issuance will be made with respect to) the number or price of Common
      Stock under option.
 
  (b) Unless otherwise provided by the Board, if dissolution or liquidation
      of OSI is proposed, the Offering Periods will end immediately before
      the proposed action is consummated.
 
  (c) If a sale of all or substantially all of OSI's assets or a merger of
      OSI with or into another corporation is proposed, each option under the
      Plan will be assumed (or an equivalent option will be substituted by)
      the successor corporation, its parent or one of its subsidiaries,
      unless the Board determines, in its sole discretion and in lieu of the
      assumption or substitution, to shorten the Offering Periods then in
      progress by setting a new Exercise Date (the "New Exercise Date"). If
      the Board sets a mew Exercise Date, it will notify each Participant in
      writing, at least 10 business days before the New Exercise Date. This
      notice will set forth that the Exercise Date has been changed to the
      New Exercise Date and that options will be exercised automatically on
      the New Exercise Date, unless before that date the Participant has
      withdrawn from the Offering Period as provided in Section 10. For
      purposes of this Subsection, an option will be deemed to have been
      assumed if, after the sale or merger, the option confers the right to
      purchase, for each share of Common Stock subject to the option
      immediately before the transaction, the same consideration (whether
      stock, cash or other securities or property) received in the
      transaction by holders of Common Stock for each share of their Common
      Stock. In making this
 
                                      A-5
<PAGE>
 
     determination, if the holders of Common Stock were offered a choice of
     consideration, the type of consideration chosen by the holders of a
     majority of the outstanding shares of Common Stock will apply.
     Notwithstanding the preceding sentences, if the consideration received
     in the transaction was not solely common stock of the successor
     corporation or its parent (as defined in Section 424(e) of the Code),
     the Board may, with the consent of the successor corporation, provide
     for the consideration to be received on exercise of the option to be
     solely common stock of the successor corporation or its parent equal in
     fair market value to the per share consideration received by holders of
     Common Stock in the transaction.
 
19. AMENDMENT OR TERMINATION.
 
  (a) The Board may, at any time and for any reason, amend or terminate the
      Plan. Except as provided in Section 18, (1) no amendment may make any
      change in an option previously granted which adversely affects the
      rights of a Participant, and (b) no termination can affect options
      previously granted, except that the Board may terminate an Offering
      Period on any Exercise Date if it determines that termination of the
      Plan is in the best interests of OSI and its stockholders. To the
      extent necessary to comply with any applicable law, rule or regulation,
      OSI will obtain all required stockholder approvals for amendments to
      the Plan.
 
  (b) Without stockholder consent and without regard to whether any
      Participant rights have been "adversely affected," the Board may change
      the Offering Periods, limit the frequency and/or number of changes in
      the amount withheld during an Offering Period, establish the exchange
      ratio applicable to amounts withheld in a currency other than U.S.
      dollars, permit payroll withholding in excess of the amount designated
      by a Participant in order to adjust for delays or mistakes in OSI's
      processing of properly completed withholding elections, establish
      reasonable waiting and adjustment periods and/or accounting and
      crediting procedures to ensure that amounts applied toward the purchase
      of Common Stock for each Participant properly correspond with amounts
      withheld from the Participant's Compensation, and establish such other
      limitations or procedures as the Board determines, in its sole
      discretion, to be advisable and consistent with the Plan.
 
20. NOTICES. All notices or other communications by a Participant to OSI in
    connection with the Plan will be in writing and will be deemed to have been
    duly given when received in the form specified by OSI and at the location,
    or by the person, designated by OSI to receive it.
 
21. CONDITIONS ON ISSUANCE OF SHARES.
 
  (a) Shares will not be issued with respect to an option unless the exercise
      of the option and the issuance and delivery of the shares complies with
      all applicable provisions of law, domestic or foreign, and has been
      approved in respect of that compliance by counsel to OSI. This
      includes, without limitation, the Securities Act of 1933, as amended,
      the Exchange Act, the rules and regulations promulgated under both, and
      the requirements of any stock exchange on which the Common Stock may
      then be listed.
 
  (b) If a representation is required in the opinion of OSI's counsel, then
      OSI may require the person exercising an option to represent and
      warrant, as a condition of exercise and at the time of exercise, that
      the Common Stock is being purchased only for investment and without any
      present intention to sell or distribute it.
 
22. TERM OF PLAN. The Plan will become effective on the earlier of its adoption
    by the Board or its approval by the stockholders of OSI. It will continue
    in effect for a term of 10 years unless sooner terminated under Section 19.
 
23. AUTOMATIC TRANSFER TO LOWER PRICE OFFERING PERIOD. To the extent permitted
    by applicable law, if the Fair Market Value of the Common Stock on an
    Exercise Date in an Offering Period is lower than the Fair Market Value of
    the Common Stock on the Enrollment Date of the Offering Period, then all
    Participants in the Offering Period will be automatically withdrawn from
    that Offering Period immediately after the exercise of their options on the
    Exercise Date and automatically re-enrolled in the immediately following
    Offering Period as of its first day.
 
                                      A-6
<PAGE>
 
                                   EXHIBIT A
 
                      OBJECTIVE SYSTEMS INTEGRATORS, INC.
 
                       1995 EMPLOYEE STOCK PURCHASE PLAN
 
                            SUBSCRIPTION AGREEMENT
 
[_] Original Application                           Enrollment Date:
[_] Change in Payroll Deduction Rate
[_] Change of Beneficiary(ies)
 
1.             elects to participate in the Objective Systems Integrators,
   Inc. 1995 Employee Stock Purchase Plan (the "Plan") and subscribes to
   purchase shares of OSI's Common Stock in accordance with this Subscription
   Agreement and the Plan.
 
2. I hereby authorize payroll deductions from each paycheck in the amount of
         of my Compensation on each payday (1-15%) during the Offering Period
   in accordance with the Plan. (Please note that no fractional percentages
   are permitted.)
 
3. I understand that these payroll deductions will be accumulated for the
   purchase of OSI Common Stock at the applicable Purchase Price determined in
   accordance with the Plan. I understand that if I do not withdraw from an
   Offering Period, any accumulated payroll deductions will be used to
   automatically exercise my option.
 
4. I have received a copy of the complete Plan. I understand that my
   participation in the Plan is in all respects subject to the terms of the
   Plan. I understand that my ability to exercise the option under this
   Subscription Agreement is subject to obtaining shareholder approval of the
   Plan.
 
5. Shares purchased for me under the Plan should be issued in the name(s) of
   (Employee or Employee and spouse only):
                                       .
 
6. I understand that if I dispose of any shares received by me under the Plan
   within 2 years after the Enrollment Date (the first day of the Offering
   Period during which I purchased the shares) or one year after the Exercise
   Date, I will be treated for federal income tax purposes as having received
   ordinary income at the time of disposition in an amount equal to the excess
   of the fair market value of the shares at the time such shares were
   purchased over the price which I paid for them. I agree to notify OSI in
   writing within 30 days after the date of any disposition of my shares and I
   will make adequate provision for Federal, state or other tax withholding
   obligations, if any, which arise on the disposition of the Common Stock.
   OSI may, but will not be obligated to, withhold from my compensation the
   amount necessary to meet any applicable withholding obligation including
   any withholding necessary to make available to OSI any tax deductions or
   benefits attributable to my sale or early disposition of Common Stock. If I
   dispose of shares at any time after the expiration of the 2-year and 1-year
   holding periods, I understand that I will be treated for federal income tax
   purposes as having received income only at the time of disposition, and
   this such income will be taxed as ordinary income only to the extent of an
   amount equal to the lesser of (a) the excess of the fair market value of
   the shares at the time of disposition over my purchase price, or (b) 15% of
   the fair market value of the shares on the first day of the Offering
   Period. The remainder of the gain, if any, recognized on disposition will
   be taxed as capital gain.
 
7. I agree to be bound by the terms of the Plan. The effectiveness of this
   Subscription Agreement depends on my eligibility to participate in the
   Plan.
 
                                      A-7
<PAGE>
 
8. If I die, I designate the following as my beneficiary(ies) to receive all
   payments and shares due me under the Plan:
 
  NAME: (Please print) ______________________________________________________
                       (First)     (Middle)     (Last)
 
                       _________________________________________________________
                       Relationship
 
 
                       _________________________________________________________
                         
                       _________________________________________________________
                      
                       _________________________________________________________
                       Address
 
  Employee's Social
  Security Number:     _________________________________________________________
 
  Employee's Address:  _________________________________________________________
 
                       _________________________________________________________
 
                       _________________________________________________________
 
  I UNDERSTAND THAT THIS SUBSCRIPTION AGREEMENT WILL REMAIN IN EFFECT
THROUGHOUT SUCCESSIVE OFFERING PERIODS UNLESS I TERMINATE IT.
 
Dated:                 _________________________________________________________
                       Signature of Employee
 
                       _________________________________________________________
                       Spouse's Signature (If beneficiary other than spouse)
 
                                      A-8
<PAGE>
 
                                   EXHIBIT B
 
                      OBJECTIVE SYSTEMS INTEGRATORS, INC.
 
                       1995 EMPLOYEE STOCK PURCHASE PLAN
 
                             NOTICE OF WITHDRAWAL
 
  The undersigned Participant in the Offering Period of the Objective Systems
Integrators, Inc. 1995 Employee Stock Purchase Plan which began on
            , 19     (the "Enrollment Date") gives notice to OSI of his or her
election to withdraw from the Offering Period. The Participant directs OSI to
pay to the Participant as promptly as practicable all the payroll deductions
credited to the Participant's account with respect to that Offering Period.
The Participant understands and agrees that the option for this Offering
Period will be automatically terminated. The Participant also understands and
agrees that no further payroll deductions will be made for the purchase of
shares in the current Offering Period. The Participant will be eligible to
participate in succeeding Offering Periods only by delivering a new
Subscription Agreement to OSI.
 
                                          Name and Address of Participant:
 
                                          _____________________________________
 
                                          _____________________________________
 
                                          _____________________________________
 
                                          Signature:
 
                                          _____________________________________
 
                                          Date:  _____________________________
 
                                      A-9
<PAGE>
 
PROXY                                                                      PROXY

          THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS

                      OBJECTIVE SYSTEMS INTEGRATORS, INC.
                      1998 ANNUAL MEETING OF STOCKHOLDERS

                               NOVEMBER 18, 1998

     The undersigned stockholder of OBJECTIVE SYSTEMS INTEGRATORS, INC., a
Delaware corporation, acknowledges receipt of the Notice of Meeting of
Stockholders and Proxy Statement, each dated October 16, 1998, and appoints Tom
L. Johnson, Richard G. Vento, David M. Allen and Philip N. Cardman, and each of
them, proxies and attorneys-in-fact, with full power to each of substitution, on
behalf and in the name of the undersigned, to represent the undersigned at the
1998 Meeting of Stockholders of OBJECTIVE SYSTEMS INTEGRATORS, INC. to be held
on November 18, 1998, at 10:00 a.m. local time, at the Lake Natoma Inn, 702 Gold
Lake Drive, Folsom, California  95630, and at any adjournment or adjournments
thereof, and to vote all shares of Common Stock which the undersigned would be
entitled to vote if then and there personally present, on the matters set forth
below:

THIS PROXY WILL BE VOTED AS DIRECTED OR, IF NO CONTRARY DIRECTION IS INDICATED,
WILL BE VOTED FOR THE ELECTION OF DIRECTORS, FOR THE AMENDMENT TO 1995 EMPLOYEE
STOCK PURCHASE PLAN, FOR THE RATIFICATION OF DELOITTE & TOUCHE LLP AS
INDEPENDENT AUDITORS AND AS SAID PROXIES DEEM ADVISABLE ON ANY OTHER MATTERS AS
PROPERLY COME BEFORE THE MEETING.


                                      (Continued and to be signed on other side)

                             FOLD AND DETACH HERE
<PAGE>
 
                                                         [ ]  Please mark
                                                              your votes
                                                              as indicated


<TABLE> 
<S>                                                         <C> 
                                                WITHHELD
                                    FOR         FOR ALL                                               FOR    AGAINST    ABSTAIN
1.  Election of Directors           [ ]           [ ]       2.  Amendment of 1995 Employee            [ ]      [ ]        [ ]
                                                                Stock Purchase Plan to increase
    If you wish to withhold authority                           the number of shares reserved for
    to vote for any individual nominee,                         grant thereunder
    strike a line through that nominee's  
    name in the list below:               
                                                            3.  Ratification of Deliotte & Touche     [ ]      [ ]        [ ]
            Tom L. Johnson                                      as the independent auditors of the
            Richard G. Vento                                    Company for the fiscal year ending
            George F. Schmitt                                   June 30, 1999.
            Jonathan B. Shantz            
            Kornel Terplan                
                                                                And in their discretion, upon such other matter or
                                                                matters which may properly come before the
                                                                meeting or adjournment or adjournments thereof.
</TABLE> 


Signature(s)                                           Date

  (This proxy should be marked, dated and signed by the stockholder(s) exactly
as his or her name appears hereon and returned promptly in the enclosed
envelope. Persons signing in a fiduciary capacity should so indicate. If shares
are held by joint tenants or as community property, both should sign.)



                               FOLD AND DETACH  


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