QUANTUM CORP /DE/
S-8, 1998-09-30
COMPUTER STORAGE DEVICES
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<PAGE>
 
      As filed with the Securities and Exchange Commission on September 30, 1998
                                                  Registration No. 333-_________
================================================================================

                     SECURITIES AND EXCHANGE COMMISSION
                           Washington, D.C.  20549
                                        
                                  FORM S-8
                           REGISTRATION STATEMENT
                                    Under
                         THE SECURITIES ACT OF 1933
                                        
                             QUANTUM CORPORATION
             (Exact name of issuer as specified in its charter)

        Delaware                                          94-2665054
(State of incorporation)                       (IRS Employer Identification No.)


                           500 McCarthy Boulevard
                         Milpitas, California  95035
                  (Address of principal executive offices)
                                        
                ATL PRODUCTS, INC. 1996 STOCK INCENTIVE PLAN
                ATL PRODUCTS, INC. 1997 STOCK INCENTIVE PLAN
                           (Full title of plan(s))
                                        
                             Richard L. Clemmer
                           Chief Financial Officer
                             Quantum Corporation
                           500 McCarthy Boulevard
                         Milpitas, California  95035
                   (Name and address of agent for service)

                               (408) 894-4000
        (Telephone number, including area code, of agent for service)
                                        
                                  Copy to:
                           Steven E. Bochner, Esq.
                       WILSON SONSINI GOODRICH & ROSATI
                             650 Page Mill Road
                      Palo Alto, California  94304-1050

                       CALCULATION OF REGISTRATION FEE
<TABLE>
<CAPTION>
<S>                                         <C>               <C>               <C>                <C> 
======================================================================================================================
                                                                Proposed           Proposed       
                                                                Maximum            Maximum          Amount of
    Title of Securities                     Amount to be      Offering Price       Aggregate       Registration    
     to be Registered                        Registered         Per Share       Offering Price         Fee    
- ----------------------------------------------------------------------------------------------------------------------
 Common Stock, par value
     $0.01 per share
 --outstanding under ATL Products, Inc.      1,489,457           $2.85           $4,244,952(1)       $1,252.26
     1996 Stock Incentive Plan
 --outstanding under ATL Products, Inc.        336,598           $5.62           $1,891,681(2)       $  558.05
     1997 Stock Incentive Plan
                       TOTAL                 1,826,055                           $6,136,633          $1,810.31
======================================================================================================================
(1)  Estimated in accordance with Rule 457(h) solely for the purpose of calculating the registration fee on the basis
of the weighted average exercise price of $2.85 per share for outstanding options to purchase a total of 1,489,457
shares of Common Stock.

(1)  Estimated in accordance with Rule 457(h) solely for the purpose of calculating the registration fee on the basis
of the weighted average exercise price of $5.62 per share for outstanding options to purchase a total of 336,598
shares of Common Stock.
======================================================================================================================
</TABLE>
<PAGE>
 
                              QUANTUM CORPORATION
                      REGISTRATION STATEMENT ON FORM S-8

                                    PART II

                INFORMATION REQUIRED IN REGISTRATION STATEMENT


ITEM 3.         INCORPORATION OF DOCUMENTS BY REFERENCE
                ---------------------------------------

     There are hereby incorporated by reference in this Registration Statement
the following documents and information heretofore filed with the Securities and
Exchange Commission (Quantum Corporation is sometimes referred to herein as the
"Company"):

                (a)     The Company's Annual Report on Form 10-K for the fiscal
     year ended March 31, 1998 filed pursuant to Section 13 of the Securities
     and Exchange Act of 1934, as amended (the "1934 Act");

                (b)     The Company's Quarterly Report on Form 10-Q for the
     quarterly period ended June 28, 1998 filed pursuant to Section 13 of the
     1934 Act;

                (c)     The Company's Current Report on Form 8-K filed 
     September 28, 1998 pursuant to Section 13 of the the 1934 Act;

                (d)     The description of the Company's Common Stock contained
     in the Company's Registration Statement on Form 8-A filed August 1, 1983
     pursuant to Section 12(b) of the 1934 Act and any amendment or report filed
     for the purpose of updating any such description; and

                (e)     The description of the Company's Preferred Share
     Purchase Rights contained in the Company's Registration Statement on 
     Form 8-A filed on August 4, 1998 pursuant to Section 12(g) of the 1934 Act,
     and any amendment or report filed for the purpose of updating any such
     description.

 
     All documents filed by the Company pursuant to Sections 13(a), 13(c), 14 or
15(d) of the 1934 Act on or after the date of this Registration Statement and
prior to the filing of a post-effective amendment which indicates that all
securities offered have been sold or which deregisters all securities then
remaining unsold shall be deemed to be incorporated by reference in this
Registration Statement and to be part hereof from the date of filing of such
documents.

     See also Additional Information.

ITEM 4.         DESCRIPTION OF SECURITIES.
                ------------------------- 

                Inapplicable.

ITEM 5.         INTERESTS OF NAMED EXPERTS AND COUNSEL.
                -------------------------------------- 

                Inapplicable.

ITEM 6.         INDEMNIFICATION OF DIRECTORS AND OFFICERS.
                ----------------------------------------- 
<PAGE>
 
          Section 145 of the Delaware General Corporation Law authorizes a court
to award, or a corporation's Board of Directors to grant, indemnification to
directors and officers in terms sufficiently broad to permit such
indemnification under certain circumstances for liabilities (including
reimbursement for expenses incurred) arising under the Securities Act of 1933.
The Company's Bylaws provide for the mandatory indemnification of its directors,
officers, employees and other agents to the maximum extent permitted by Delaware
General Corporation Law, and the Company has entered into agreements with its
officers, directors and certain key employees implementing such indemnification.

ITEM 7.         EXEMPTION FROM REGISTRATION CLAIMED.
                ----------------------------------- 

                Inapplicable.

ITEM 8.         EXHIBITS
                --------

                Exhibit
                Number                    Description
                -------                   -----------

                4.1       ATL Products, Inc. 1996 Stock Incentive Plan.

                4.2       ATL Products, Inc. 1997 Stock Incentive Plan.

                5.1       Opinion of Wilson Sonsini Goodrich & Rosati, P.C. as
                          to legality of securities being registered.

                24.1      Consent of Ernst & Young, LLP, Independent Auditors
 
                24.2      Consent of KPMG Peat Marwick LLP.

                24.3      Consent of Wilson Sonsini Goodrich & Rosati, P.C.
                          (contained in Exhibit 5.1).

                25.1      Power of Attorney (see page II-4).

ITEM 9.         UNDERTAKINGS
                ------------

                A.      The undersigned registrant hereby undertakes:

                        (1)     To file, during any period in which offers or
sales are being made, a post-effective amendment to this registration statement
to include any material information with respect to the plan of distribution not
previously disclosed in the registration statement or any material change to
such information in the registration statement.

                        (2)     That, for the purpose of determining any
liability under the Securities Act of 1933, each such post-effective amendment
shall be deemed to be a new registration statement relating to the securities
offered therein, and the offering of such securities at that time shall be
deemed to be the initial bona fide offering thereof.

                        (3)     To remove from registration by means of a post-
effective amendment any of the securities being registered which remain unsold
at the termination of the offering.
<PAGE>
 
                B.      The undersigned registrant hereby undertakes that, for
purposes of determining any liability under the Securities Act of 1933, each
filing of the registrant's annual report pursuant to Section 13(a) or Section
15(d) of the Securities Exchange Act of 1934 (and, where applicable, each filing
of an employee benefit plan's annual report pursuant to Section 15(d) of the
Securities Exchange Act of 1934) that is incorporated by reference in the
registration statement shall be deemed to be a new registration statement
relating to the securities offered therein, and the offering of such securities
at that time shall be deemed to be the initial bona fide offering thereof.

                C.      Insofar as indemnification for liabilities arising under
the Securities Act of 1933 may be permitted to directors, officers and
controlling persons of the Company pursuant to the Delaware General Corporation
Law, the Certificate of Incorporation of the Company, the Bylaws of the Company,
indemnification agreements entered into between the Company and its officers and
directors or otherwise, the Company has been advised that in the opinion of the
Securities and Exchange Commission such indemnification is against public policy
as expressed in the Securities Act of 1933 and is, therefore, unenforceable. In
the event that a claim for indemnification against such liabilities (other than
the payment by the Company in successful defense of any action, suit or
proceeding) is asserted by such director, officer or controlling person in
connection with the securities being registered here under, the Company will,
unless in the opinion of its counsel the matter has been settled by controlling
precedent, submit to a court of appropriate jurisdiction the question of whether
such indemnification by it is against public policy as expressed in the
Securities Act of 1933 and will be governed by the final adjudication of such
issue.

ITEM 10.  ADDITIONAL INFORMATION.

     At September 28, 1998, MKE Quantum Components, LLC ("MKQC"), of which the 
Company owns a 49% equity interest, was in violation of a covenant related to 
its financing relationship with a bank, under which approximately $50 million 
and $27 million was outstanding under long-term and revolving debt agreements, 
respectively.  MKQC has notified the bank of the violation and is currently 
working towards obtaining a covenant waiver and/or amendments to the loan 
agreement. MKQC management believes, based on discussions with the bank, that it
will obtain a covenant waiver and/or amendments from the bank. However, there
can be no assurances that such a covenant waiver and/or amendments will be
obtained or that such amendments, if any, will be provided on terms favorable to
MKQC.

If MKQC is unable to obtain a covenant waiver and/or an appropriate amendment to
the loan agreement, the bank has the right to exercise its remedies under the 
loan agreement, which includes but is not limited to, the acceleration of
payment terms, imposition of increased interest rates and/or proceeding against
the assets of MKQC.
<PAGE>
 
                                  SIGNATURES

     Pursuant to the requirements of the Securities Act of 1933, the Registrant,
Quantum Corporation, a corporation organized and existing under the laws of the
State of Delaware, certifies that it has reasonable grounds to believe that it
meets all of the requirements for filing on Form S-8 and has duly caused this
Registration Statement to be signed on its behalf by the undersigned, thereunto
duly authorized, in the City of Milpitas, State of California, on this 30th day
of September, 1998.

                                            QUANTUM CORPORATION

                                       By: /s/ Richard L. Clemmer
                                           -------------------------------------
                                           Richard L. Clemmer,
                                           Executive Vice President, Finance and
                                           Chief Financial Officer


                               POWER OF ATTORNEY

     KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature
appears below constitutes and appoints Andrew Kryder and Richard L. Clemmer,
jointly and severally, his attorneys-in-fact, each with the power of
substitution, for him in any and all capacities, to sign any amendments to this
Registration Statement on Form S-8, and to file the same, with exhibits thereto
and other documents in connection therewith, with the Securities and Exchange
Commission, hereby ratifying and confirming all that each of said attorneys-in-
fact, or his substitute or substitutes, may do or cause to be done by virtue
hereof.

     Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities and on the dates indicated.

<TABLE>
<CAPTION>
          Signature                           Title                      Date
 ---------------------------    ------------------------------      -----------------
<S>                            <C>                                  <C>
/s/ Michael A. Brown           Chief Executive Officer and           September 30, 1998 
- -----------------------------  Chairman of the Board
    (Michael A. Brown)         (Principal Executive Officer)

/s/ Richard L. Clemmer         Executive Vice President, Finance     September 30, 1998 
- -----------------------------  and Chief Financial Officer
    (Richard L. Clemmer)       (Principal Financial and
                               Accounting Officer)

/s/ Stephen M. Berkley         Director                              September 30, 1998 
- -----------------------------
    (Stephen M. Berkley)

/s/ David A. Brown             Director                              September 30, 1998 
- -----------------------------
    (David A. Brown)

/s/ Robert J. Casale           Director                              September 30, 1998 
- -----------------------------
    (Robert J. Casale)

/s/ Edward M. Esber            Director                              September 30, 1998 
- -----------------------------
    (Edward M. Esber)

/s/ Steven C. Wheelwright      Director                              September 30, 1998 
- -----------------------------
    (Steven C. Wheelwright)
</TABLE>
<PAGE>
 
                               INDEX TO EXHIBITS


<TABLE>
<CAPTION>
                                                                                        Sequentially
Exhibit                                                                                   Numbered
Number                               Description                                            Page
- ------           -------------------------------------------------                      -------------                            
<C>      <S>                                                                    <C>
  4.1          ATL Products, Inc. 1996 Stock Incentive Plan.........................
 
  4.2          ATL Products, Inc. 1997 Stock Incentive Plan.........................
 
  5.1          Opinion of Wilson Sonsini Goodrich & Rosati, P.C. as to legality of
                securities being registered.........................................

 24.1          Consent of Ernst & Young LLP, Independent Auditors...................
  
 24.2          Consent of KPMG Peat Marwick LLP.....................................

 24.3          Consent of Wilson Sonsini Goodrich & Rosati, P.C. (contained in
               Exhibit 5.1).........................................................
 
 25.1          Power of Attorney (see Page II-4 of Registration Statement)..........
 
</TABLE>

<PAGE>
 
                                                                     EXHIBIT 4.1

                              ATL PRODUCTS, INC.
                           1996 STOCK INCENTIVE PLAN
                           -------------------------



                                  ARTICLE ONE

                              GENERAL PROVISIONS
                              ------------------


I.     PURPOSE OF THE PLAN


       This 1996 Stock Incentive Plan is intended to promote the interests of
ATL Products, Inc., a Delaware corporation, by providing eligible persons with
the opportunity to acquire a proprietary interest, or otherwise increase their
proprietary interest, in the Corporation as an incentive for them to remain in
the service of the Corporation.

       Capitalized terms shall have the meanings assigned to such terms in the
attached Appendix.


II.    STRUCTURE OF THE PLAN


       A.  The Plan shall be divided into three separate equity programs:


           (i)    the Discretionary Option Grant Program under which eligible
persons may, at the discretion of the Plan Administrator, be granted options to
purchase shares of Class B Common Stock,

 
           (ii)   the Stock Issuance Program under which eligible persons may,
at the discretion of the Plan Administrator, be issued shares of Class B Common
Stock directly, either through the immediate purchase of such shares or as a
bonus for services rendered the Corporation (or any Parent or Subsidiary), and

           (iii)  the Automatic Option Grant Program under which eligible 
non-employee Board members shall automatically receive option grants at periodic
intervals to purchase shares of Class B Common Stock.


       B.  The provisions of Articles One and Five shall apply to all equity 
programs under the Plan and shall govern the interests of all persons under the
Plan.
<PAGE>
 
III.   ADMINISTRATION OF THE PLAN


       A.  Prior to the Section 12 Registration Date, the Discretionary Option
Grant and Stock Issuance Programs shall be administered by the Board. Effective
with the Section 12 Registration Date, the Primary Committee shall have sole and
exclusive authority to administer the Discretionary Option Grant and Stock
Issuance Programs with respect to Section 16 Insiders.

       Administration of the Discretionary Option Grant and Stock Issuance
Programs with respect to all other persons eligible to participate in those
programs may, at the Board's discretion, be vested in the Primary Committee or a
Secondary Committee, or the Board may retain the power to administer those
programs with respect to all such persons.


       B.  Members of the Primary Committee or any Secondary Committee shall 
serve for such period of time as the Board may determine and may be removed by
the Board at any time. The Board may also at any time terminate the functions of
any Secondary Committee and reassume all powers and authority previously
delegated to such committee.

       C.  Each Plan Administrator shall, within the scope of its administrative
functions under the Plan, have full power and authority (subject to the
provisions of the Plan) to establish such rules and regulations as it may deem
appropriate for proper administration of the Discretionary Option Grant and
Stock Issuance Programs and to make such determinations under, and issue such
interpretations of, the provisions of such programs and any outstanding options
or stock issuances thereunder as it may deem necessary or advisable.  Decisions
of the Plan Administrator within the scope of its administrative functions under
the Plan shall be final and binding on all parties who have an interest in the
Discretionary Option Grant and Stock Issuance Programs under its jurisdiction or
any option or stock issuance thereunder.

       D.  Service on the Primary Committee or the Secondary Committee shall
constitute service as a Board member, and members of each such committee shall
accordingly be entitled to full indemnification and reimbursement as Board
members for their service on such committee.  No member of the Primary Committee
or the Secondary Committee shall be liable for any act or omission made in good
faith with respect to the Plan or any option grants or stock issuances under the
Plan.

       E.  Administration of the Automatic Option Grant shall be self-executing
in accordance with the terms of those programs, and no Plan Administrator shall
exercise any discretionary functions with respect to any option grants or stock
issuances made under those programs.


IV.    ELIGIBILITY

       A.  The persons eligible to participate in the Discretionary Option 
Grant and Stock Issuance Programs are as follows:
<PAGE>
 
           (i)    Employees,


           (ii)   non-employee members of the Board or the board of directors
     of any Parent or Subsidiary, and


           (iii)  consultants and other independent advisors who provide 
services to the Corporation (or any Parent or Subsidiary).


       B.  Each Plan Administrator shall, within the scope of its administrative
jurisdiction under the Plan, have full authority to determine, (i) with respect
to the option grants under the Discretionary Option Grant Program, which
eligible persons are to receive option grants, the time or times when such
option grants are to be made, the number of shares to be covered by each such
grant, the status of the granted option as either an Incentive Option or a Non-
Statutory Option, the time or times when each option is to become exercisable,
the vesting schedule (if any) applicable to the option shares and the maximum
term for which the option is to remain outstanding and (ii) with respect to
stock issuances under the Stock Issuance Program, which eligible persons are to
receive stock issuances, the time or times when such issuances are to be made,
the number of shares to be issued to each Participant, the vesting schedule (if
any) applicable to the issued shares and the consideration to be paid for such
shares.

       C.  The Plan Administrator shall have the absolute discretion either to 
grant options in accordance with the Discretionary Option Grant Program or to
effect stock issuances in accordance with the Stock Issuance Program.

       D.  The individuals who shall be eligible to participate in the Automatic
Option Grant Program shall be limited to (i) those individuals who first become
non-employee Board members after the Plan Effective Date, whether through
appointment by the Board or election by the Corporation's stockholders, and (ii)
those individuals who continue to serve as non-employee Board members at one or
more Annual Stockholders Meetings held after the Underwriting Date.  A non-
employee Board member who has previously been in the employ of the Corporation
(or any Parent or Subsidiary) shall not be eligible to receive an option grant
under the Automatic Option Grant Program at the time he or she first becomes a
non-employee Board member, but shall be eligible to receive periodic option
grants under the Automatic Option Grant Program while he or she continues to
serve as a non-employee Board member.


V.     STOCK SUBJECT TO THE PLAN


       A.  The stock issuable under the Plan shall be shares of authorized but
unissued or reacquired Class B Common Stock, including shares repurchased by the
Corporation on the open market.  The maximum number of shares of Class B Common
Stock initially reserved for issuance over the term of the Plan shall not exceed
two million (2,000,000) shares.


       B.  No one person participating in the Plan may receive options, 
separately exercisable stock appreciation rights and direct stock issuances for
more than two hundred fifty
<PAGE>
 
thousand (250,000) shares of Class B Common Stock in the aggregate per calendar
year, beginning with the 1997 calendar year.

       C.  Shares of Class B Common Stock subject to outstanding options shall
be available for subsequent issuance under the Plan to the extent those options
expire or terminate for any reason prior to exercise in full. Unvested shares
issued under the Plan and subsequently repurchased by the Corporation, at the
original issue price paid per share, pursuant to the Corporation's repurchase
rights under the Plan shall be added back to the number of shares of Class B
Common Stock reserved for issuance under the Plan and shall accordingly be
available for reissuance through one or more subsequent option grants or direct
stock issuances under the Plan. However, should the exercise price of an option
under the Plan be paid with shares of Class B Common Stock or should shares of
Class B Common Stock otherwise issuable under the Plan be withheld by the
Corporation in satisfaction of the withholding taxes incurred in connection with
the exercise of an option or the vesting of a stock issuance under the Plan,
then the number of shares of Class B Common Stock available for issuance under
the Plan shall be reduced by the gross number of shares for which the option is
exercised or which vest under the stock issuance, and not by the net number of
shares of Class B Common Stock issued to the holder of such option or stock
issuance.

       D.  If any change is made to the Class B Common Stock by reason of any 
stock split, stock dividend, recapitalization, combination of shares, exchange
of shares or other change affecting the outstanding Class B Common Stock as a
class without the Corporation's receipt of consideration, appropriate
adjustments shall be made to (i) the maximum number and/or class of securities
issuable under the Plan, (ii) the number and/or class of securities for which
any one person may be granted stock options, separately exercisable stock
appreciation rights and direct stock issuances under this Plan per calendar
year, (iii) the number and/or class of securities for which grants are
subsequently to be made under the Automatic Option Grant Program to new and
continuing non-employee Board members, (iv) the number and/or class of
securities and the exercise price per share in effect under each outstanding
option under the Plan. Such adjustments to the outstanding options are to be
effected in a manner which shall preclude the enlargement or dilution of rights
and benefits under such options. The adjustments determined by the Plan
Administrator shall be final, binding and conclusive.
<PAGE>
 
                                  ARTICLE TWO

                      DISCRETIONARY OPTION GRANT PROGRAM
                      ----------------------------------



I.     OPTION TERMS


       Each option shall be evidenced by one or more documents in the form 
approved by the Plan Administrator; provided, however, that each such document
                                    --------
shall comply with the terms specified below. Each document evidencing an
Incentive Option shall, in addition, be subject to the provisions of the Plan
applicable to such options.

       A.  EXERCISE PRICE.
           -------------- 

           1.  The exercise price per share shall be fixed by the Plan 
Administrator but shall not be less than one hundred percent (100%) of the Fair
Market Value per share of Class B Common Stock on the option grant date.
However, if the person to whom the option is granted is a 10% Stockholder, then
the exercise price per share shall not be less than one hundred ten percent
(110%) of the Fair Market Value per share of Common Stock on the option grant
date.

           2.  The exercise price shall become immediately due upon exercise of
the option and shall be payable in one or more of the forms specified below:

               (i)   cash or check made payable to the Corporation, or



               (ii)  shares of Common Stock or Class B Common Stock held for the
       requisite period necessary to avoid a charge to the Corporation's
       earnings for financial reporting purposes and valued at Fair Market Value
       on the Exercise Date.

       Should the Class B Common Stock be registered under Section 12(g) of the
       1934 Act at the time the option is exercised, then the exercise price for
       any vested shares purchased under the option may be paid through a
       special sale and remittance procedure pursuant to which the Optionee
       shall concurrently provide irrevocable written instructions to (a) a
       Corporation-designated brokerage firm to effect the immediate sale of the
       purchased shares and remit to the Corporation, out of the sale proceeds
       available on the settlement date, sufficient funds to cover the aggregate
       exercise price payable for the purchased shares plus all applicable
       Federal, state and local income and employment taxes required to be
       withheld by the Corporation by reason of such exercise and (b) the
       Corporation to deliver the certificates for the purchased shares to such
       brokerage firm in order to complete the sale.


       Except to the extent such sale and remittance procedure is utilized,
payment of the exercise price for the purchased shares must be made on the
Exercise Date.
<PAGE>
 
       B.  EXERCISE AND TERM OF OPTIONS.  Each option shall be exercisable at 
           ----------------------------
such time or times, during such period and for such number of shares as shall be
determined by the Plan Administrator and set forth in the documents evidencing
the option. However, no option shall have a term in excess of ten (10) years
measured from the option grant date.

       C.  EFFECT OF TERMINATION OF SERVICE.
           -------------------------------- 

           1.  The following provisions shall govern the exercise of any options
held by the Optionee at the time of cessation of Service or death:

               (i)   Any option outstanding at the time of the Optionee's
       cessation of Service for any reason shall remain exercisable for such
       period of time thereafter as shall be determined by the Plan
       Administrator and set forth in the documents evidencing the option, but
       no such option shall be exercisable after the expiration of the option
       term.

               (ii)   Any option exercisable in whole or in part by the Optionee
       at the time of death may be subsequently exercised by the personal
       representative of the Optionee's estate or by the person or persons to
       whom the option is transferred pursuant to the Optionee's will or in
       accordance with the laws of descent and distribution.

               (iii)  During the applicable post-Service exercise period, the
       option may not be exercised in the aggregate for more than the number of
       vested shares for which the option is exercisable on the date of the
       Optionee's cessation of Service. Upon the expiration of the applicable
       exercise period or (if earlier) upon the expiration of the option term,
       the option shall terminate and cease to be outstanding for any vested
       shares for which the option has not been exercised. However, the option
       shall, immediately upon the Optionee's cessation of Service, terminate
       and cease to be outstanding to the extent the option is not otherwise at
       that time exercisable for vested shares.

           2.  The Plan Administrator shall have complete discretion,
exercisable either at the time an option is granted or at any time while the
option remains outstanding, to:

               (i)    extend the period of time for which the option is to
       remain exercisable following the Optionee's cessation of Service from the
       limited exercise period otherwise in effect for that option to such
       greater period of time as the Plan Administrator shall deem appropriate,
       but in no event beyond the expiration of the option term, and/or

               (ii)   permit the option to be exercised, during the applicable
       post-Service exercise period, not only with respect to the number of
       vested shares of Common Stock for which such option is exercisable at the
       time of
<PAGE>
 
       the Optionee's cessation of Service but also with respect to one or more
       additional installments in which the Optionee would have vested had the
       Optionee continued in Service.

       D.  STOCKHOLDER RIGHTS.  The holder of an option shall have no 
           ------------------
stockholder rights with respect to the shares subject to the option until such
person shall have exercised the option, paid the exercise price and become a
holder of record of the purchased shares.

       E.  UNVESTED SHARES.  The Plan Administrator shall have the discretion to
           ---------------                                                      
grant options which are exercisable for unvested shares of Class B Common Stock.
Should the Optionee cease Service while holding such unvested shares, the
Corporation shall have the right to repurchase, at the exercise price paid per
share, all or (at the discretion of the Corporation and with the consent of the
Optionee) any of those unvested shares.  The terms upon which such repurchase
right shall be exercisable (including the period and procedure for exercise and
the appropriate vesting schedule for the purchased shares) shall be established
by the Plan Administrator and set forth in the document evidencing such
repurchase right.  The Plan Administrator may not impose a vesting schedule upon
any option grant or any shares of Class B Common Stock subject to the option
which is more restrictive than twenty percent (20%) per year vesting, with the
initial vesting to occur not later than one (1) year after the option grant
date.

       F.  LIMITED TRANSFERABILITY OF OPTIONS.  During the lifetime of the 
           ----------------------------------
Optionee, Incentive Options shall be exercisable only by the Optionee and shall
not be assignable or transferable other than by will or by the laws of descent
and distribution following the Optionee's death.

II.    INCENTIVE OPTIONS

       The terms specified below shall be applicable to all Incentive Options.
Except as modified by the provisions of this Section II, all the provisions of
Articles One, Two and Five shall be applicable to Incentive Options. Options
designated as Non-Statutory Options when issued under the Plan shall not be
                                                                     ---   
subject to the terms of this Section II.

       A.  ELIGIBILITY.  Incentive Options may be granted only to Employees.
           -----------                                                      

       B.  DOLLAR LIMITATION.  The aggregate Fair Market Value of the shares 
           -----------------
of Class B Common Stock (determined as of the respective date or dates of grant)
for which one or more options granted to any Employee under the Plan (or any
other option plan of the Corporation or any Parent or Subsidiary) may for the
first time become exercisable as Incentive Options during any one calendar year
shall not exceed the sum of One Hundred Thousand Dollars ($100,000). To the
extent the Employee holds two (2) or more such options which become exercisable
for the first time in the same calendar year, the foregoing limitation on the
exercisability of such options as Incentive Options shall be applied on the
basis of the order in which such options are granted.

       C.  10% STOCKHOLDER.  If any Employee to whom an Incentive Option is 
           ---------------   
<PAGE>
 
granted is a 10% Stockholder, then the option term shall not exceed five (5)
years measured from the option grant date.

III.   CORPORATE TRANSACTION/CHANGE IN CONTROL

       A.  In the event of any Corporate Transaction, each outstanding option
shall automatically accelerate so that each such option shall, immediately prior
to the effective date of the Corporate Transaction, become fully exercisable
with respect to the total number of shares of Class B Common Stock at the time
subject to such option and may be exercised for any or all of those shares as
fully-vested shares of Class B Common Stock. Subject to Section III.E. of this
Article Two, an unvested outstanding option shall not so accelerate if and to
the extent: (i) such option is, in connection with the Corporate Transaction,
either to be assumed by the successor corporation (or parent thereof) or to be
replaced with a comparable option to purchase shares of the capital stock of the
successor corporation (or parent thereof), (ii) such option is to be replaced
with a cash incentive program of the successor corporation which preserves the
spread existing on the unvested option shares at the time of the Corporate
Transaction and provides for subsequent payout in accordance with the same
vesting schedule applicable to those option shares or (iii) the acceleration of
such option is subject to other limitations imposed by the Plan Administrator at
the time of the option grant. The determination of option comparability under
clause (i) above shall be made by the Plan Administrator, and its determination
shall be final, binding and conclusive.

       B.  All outstanding repurchase rights shall also terminate automatically,
and the Class B Common Stock subject to those terminated rights shall
immediately vest in full, in the event of any Corporate Transaction, except to
the extent: (i) those repurchase rights are to be assigned to the successor
corporation (or parent thereof) in connection with such Corporate Transaction or
(ii) such accelerated vesting is precluded by other limitations imposed by the
Plan Administrator at the time the repurchase right is issued.

       C.  Immediately following the consummation of the Corporate Transaction,
all outstanding options shall terminate and cease to be outstanding, except to
the extent assumed by the successor corporation (or parent thereof).

       D.  Each option which is assumed in connection with a Corporate
Transaction shall be appropriately adjusted, immediately after such Corporate
Transaction, to apply to the number and class of securities which would have
been issuable to the Optionee in consummation of such Corporate Transaction had
the option been exercised immediately prior to such Corporate Transaction.
Appropriate adjustments to reflect such Corporate Transaction shall also be made
to (i) the exercise price payable per share under each outstanding option,
provided the aggregate exercise price payable for such securities shall remain
- --------    
the same, (ii) the maximum number and/or class of securities available for
issuance over the remaining term of the Plan and (iii) the maximum number and/or
class of securities for which any one person may be granted stock options,
separately exercisable stock appreciation rights and direct stock issuances
under the Plan per calendar year.
<PAGE>
 
       E.  Notwithstanding Section III.A. of this Article Two, the Plan
Administrator shall have the discretionary authority, exercisable either at the
time the option is granted or at any time while the option remains outstanding,
to provide for the automatic acceleration of one or more outstanding options
under the Discretionary Option Grant Program upon the occurrence of a Corporate
Transaction, whether or not those options are to be assumed or replaced in the
Corporate Transaction. In addition, the Plan Administrator shall have the
discretionary authority to structure one or more of the Corporation's repurchase
rights so that those rights shall not be assignable in connection with a
Corporate Transaction and shall accordingly terminate upon the consummation of
such Corporate Transaction, and the shares subject to those terminated
repurchase rights shall immediately vest in full, whether or not the options
under which those shares are purchasable are to be assumed by the successor
corporation.

       F.  The Plan Administrator shall have full power and authority
exercisable, either at the time the option is granted or at any time while the
option remains outstanding, to provide for the automatic acceleration of one or
more outstanding options under the Discretionary Option Grant Program in the
event the Optionee's Service is subsequently terminated by reason of an
Involuntary Termination within a designated period (not to exceed eighteen (18)
months) following the effective date of any Corporate Transaction in which those
options are assumed or replaced and do not otherwise accelerate. Any options so
accelerated shall remain exercisable for fully-vested shares until the earlier
                                                                       -------
of (i) the expiration of the option term or (ii) the expiration of the one (1)-
year period measured from the effective date of the Involuntary Termination.  In
addition, the Plan Administrator shall have the discretionary authority to
structure one or more of the Corporation's repurchase rights so that those
repurchase rights shall immediately terminate with respect to any shares held by
the Optionee at the time of his or her Involuntary Termination, and the shares
subject to those terminated rights shall accordingly vest in full.

       G.  The Plan Administrator shall have full power and authority
exercisable, either at the time the option is granted or at any time while the
option remains outstanding, to provide for the automatic acceleration of one ore
more outstanding options under the Discretionary Option Grant Program upon (i) a
Change in Control or (ii) the subsequent termination of the Optionee's Service
by reason of an Involuntary Termination within a designated period (not to
exceed eighteen (18) months) following the effective date of such Change in
Control. Each option so accelerated shall remain exercisable for fully-vested
shares until the earlier of (i) the expiration of the option term or (ii) the
                 -------                                                     
expiration of the one (1)-year period measured from the effective date of the
Optionee's cessation of Service.  In addition, the Plan Administrator shall have
the discretionary authority to structure one or more of the Corporation's
repurchase rights so that those repurchase rights shall immediately terminate
with respect to any shares held by the Optionee at the time of such Change in
Control or Involuntary Termination, and the shares subject to those terminated
rights shall accordingly vest in full.

       H.  The portion of any Incentive Option accelerated in connection with a
Corporate Transaction or Change in Control shall remain exercisable as an
Incentive Option only to the extent the applicable One Hundred Thousand Dollar
limitation is not exceeded.  To the extent 
<PAGE>
 
such dollar limitation is exceeded, the accelerated portion of such option shall
be exercisable as a Non-Statutory Option under the Federal tax laws.

       I.  The outstanding options shall in no way affect the right of the
Corporation to adjust, reclassify, reorganize or otherwise change its capital or
business structure or to merge, consolidate, dissolve, liquidate or sell or
transfer all or any part of its business or assets.

IV.    CANCELLATION AND REGRANT OF OPTIONS

       The Plan Administrator shall have the authority to effect, at any time
and from time to time, with the consent of the affected option holders, the
cancellation of any or all outstanding options under the Discretionary Option
Grant Program and to grant in substitution new options covering the same or
different number of shares of Class B Common Stock but with an exercise price
per share equal to the Fair Market Value per share of Class B Common Stock on
the new grant date.

V.     STOCK APPRECIATION RIGHTS

       A.  The Plan Administrator shall have the authority to grant to selected
Optionees tandem stock appreciation rights and/or limited stock appreciation
rights.

       B.  The following terms shall govern the grant and exercise of tandem 
stock appreciation rights:

           (i)    One or more Optionees may be granted the right, exercisable
       upon such terms as the Plan Administrator may establish, to elect between
       the exercise of the underlying option for shares of Class B Common Stock
       and the surrender of that option in exchange for a distribution from the
       Corporation in an amount equal to the excess of (a) the Fair Market Value
       (on the option surrender date) of the number of shares in which the
       Optionee is at the time vested under the surrendered option (or
       surrendered portion thereof) over (b) the aggregate exercise price
       payable for such shares.

           (ii)   No such option surrender shall be effective unless it is
       approved by the Plan Administrator, either at the time of the actual
       option surrender or at any earlier time. If the surrender is so approved,
       then the distribution to which the Optionee shall be entitled may be made
       in shares of Class B Common Stock valued at Fair Market Value on the
       option surrender date, in cash, or partly in shares and partly in cash,
       as the Plan Administrator shall in its sole discretion deem appropriate.

           (iii)  If the surrender of an option is not approved by the Plan
       Administrator, then the Optionee shall retain whatever rights the
       Optionee had under the surrendered option (or surrendered portion
       thereof) on the option 
<PAGE>
 
       surrender date and may exercise such rights at any time prior to the
       later of (a) five (5) business days after the receipt of the rejection
       -----                                                                 
       notice or (b) the last day on which the option is otherwise exercisable
       in accordance with the terms of the documents evidencing such option, but
       in no event may such rights be exercised more than ten (10) years after
       the option grant date.


       C.  The following terms shall govern the grant and exercise of limited
stock appreciation rights:

           (i)    One or more Section 16 Insiders may be granted limited stock
       appreciation rights with respect to their outstanding options.

           (ii)   Upon the occurrence of a Hostile Takeover, each individual
       holding one or more options with such a limited stock appreciation right
       shall have the unconditional right (exercisable for a thirty (30)-day
       period following such Hostile Takeover) to surrender each such option to
       the Corporation, to the extent the option is at the time exercisable for
       vested shares of Class B Common Stock. In return for the surrendered
       option, the Optionee shall receive a cash distribution from the
       Corporation in an amount equal to the excess of (A) the Takeover Price of
       the shares of Class B Common Stock which are at the time vested under
       each surrendered option (or surrendered portion thereof) over (B) the
       aggregate exercise price payable for such shares. Such cash distribution
       shall be paid within five (5) days following the option surrender date.

           (iii)  The Plan Administrator shall pre-approve, at the time the
       limited right is granted, the subsequent exercise of that right in
       accordance with the terms of the grant and the provisions of this Section
       V. No additional approval of the Plan Administrator or the Board shall be
       required at the time of the actual option surrender and cash
       distribution.

           (iv)   The balance of the option (if any) shall remain outstanding
     and exercisable in accordance with the documents evidencing such option.
<PAGE>
 
                                 ARTICLE THREE
                                        
                            STOCK ISSUANCE PROGRAM
                            ----------------------

I.     STOCK ISSUANCE TERMS

       Shares of Class B Common Stock may be issued under the Stock Issuance
Program through direct and immediate issuances without any intervening option
grants. Each such stock issuance shall be evidenced by a Stock Issuance
Agreement which complies with the terms specified below.

       A.  PURCHASE PRICE.
           -------------- 

           1.  The purchase price per share shall be fixed by the Plan
Administrator, but shall not be less than one hundred percent (100%) of the Fair
Market Value per share of Class B Common Stock on the issuance date. However,
the purchase price per share of Common Stock issued to a 10% Stockholder shall
not be less than one hundred and ten percent (110%) of such Fair Market Value.

           2.  Subject to the provisions of Section I of Article Five, shares of
Class B Common Stock may be issued under the Stock Issuance Program for any of
the following items of consideration which the Plan Administrator may deem
appropriate in each individual instance:

               (i)   cash or check made payable to the Corporation, or

               (ii)  past services rendered to the Corporation (or any Parent or
       Subsidiary).

       B.  VESTING PROVISIONS.
           ------------------ 

           1.  Shares of Class B Common Stock issued under the Stock Issuance
Program may, in the discretion of the Plan Administrator, be fully and
immediately vested upon issuance or may vest in one or more installments over
the Participant's period of Service or upon attainment of specified performance
objectives. However, the Plan Administrator may not impose a vesting schedule
upon any stock issuance effected under the Stock Issuance Program which is more
restrictive than twenty percent (20%) per year vesting, with initial vesting to
occur not later than one (1) year after the issuance date.

           2.  Any new, substituted or additional securities or other property
(including money paid other than as a regular cash dividend) which the
Participant may have the right to receive with respect to the Participant's
unvested shares of Class B Common Stock by reason of any stock dividend, stock
split, recapitalization, combination of shares, exchange of shares or other
change affecting the outstanding Class B Common Stock as a class without the
<PAGE>
 
Corporation's receipt of consideration shall be issued subject to (i) the same
vesting requirements applicable to the Participant's unvested shares of Class B
Common Stock and (ii) such escrow arrangements as the Plan Administrator shall
deem appropriate.

           3.  The Participant shall have full stockholder rights with respect
to any shares of Class B Common Stock issued to the Participant under the Stock
Issuance Program, whether or not the Participant's interest in those shares is
vested. Accordingly, the Participant shall have the right to vote such shares
and to receive any regular cash dividends paid on such shares.

           4.  Should the Participant cease to remain in Service while holding
one or more unvested shares of Class B Common Stock issued under the Stock
Issuance Program or should the performance objectives not be attained with
respect to one or more such unvested shares of Class B Common Stock, then those
shares shall be immediately surrendered to the Corporation for cancellation, and
the Participant shall have no further stockholder rights with respect to those
shares. The Corporation shall repay to the Participant any cash consideration
paid for the surrendered shares and shall cancel the unpaid principal balance of
any outstanding purchase-money note of the Participant attributable to the
surrendered shares.

           5.  The Plan Administrator may in its discretion waive the surrender
and cancellation of one or more unvested shares of Class B Common Stock which
would otherwise occur upon the cessation of the Participant's Service or the 
non-attainment of the performance objectives applicable to those shares. Such
waiver shall result in the immediate vesting of the Participant's interest in
the shares as to which the waiver applies. Such waiver may be effected at any
time, whether before or after the Participant's cessation of Service or the
attainment or non-attainment of the applicable performance objectives.

II.    CORPORATE TRANSACTION/CHANGE IN CONTROL

       A.  All of the Corporation's outstanding repurchase rights under the
Stock Issuance Program shall terminate automatically, and all the shares of
Class B Common Stock subject to those terminated rights shall immediately vest
in full, in the event of any Corporate Transaction, except to the extent (i)
those repurchase rights are to be assigned to the successor corporation (or
parent thereof) in connection with such Corporate Transaction or (ii) such
accelerated vesting is precluded by other limitations imposed in the Stock
Issuance Agreement.

       B.  Notwithstanding Section II.A. of this Article Three, the Plan
Administrator shall have the discretionary authority, exercisable either at the
time the unvested shares are issued or any time while the Corporation's
repurchase rights with respect to those shares remain outstanding under the
Stock Issuance Program, to structure one or more of those repurchase rights so
that such rights shall not be assignable in connection with a Corporate
Transaction and shall accordingly terminate upon the consummation of such
Corporate Transaction, and the shares subject to those terminated repurchase
rights shall immediately vest in full, in the event the Participant's Service
should subsequently terminate by reason of an Involuntary Termination within a
designated period (not to exceed eighteen (18) months) following the effective
date of any 
<PAGE>
 
Corporate Transaction in which those repurchase rights are assigned to the
successor corporation (or parent thereof).

       C.  The Plan Administrator shall have the discretionary authority,
exercisable either at the time the unvested shares are issued or any time while
the Corporation's repurchase rights with respect to those shares remain
outstanding under the Stock Issuance Program, to structure one or more of those
repurchase rights so that such rights shall automatically terminate in whole or
in part, and the shares of Class B Common Stock subject to those terminated
rights shall immediately vest, upon (i) a Change in Control or (ii) the
subsequent termination of the Participant's Service by reason of an Involuntary
Termination within a designated period (not to exceed eighteen (18) months)
following the effective date of such Change in Control or Involuntary
Termination.

III.   SHARE ESCROW/LEGENDS

       Unvested shares may, in the Plan Administrator's discretion, be held in
escrow by the Corporation until the Participant's interest in such shares vests
or may be issued directly to the Participant with restrictive legends on the
certificates evidencing those unvested shares.
<PAGE>
 
                                 ARTICLE FOUR

                        AUTOMATIC OPTION GRANT PROGRAM
                        ------------------------------

I.     OPTION TERMS

       A.  GRANT DATES.  Option grants shall be made on the dates specified 
           ----------- 
below:

           1.  Each individual who is first elected or appointed as a non-
employee Board member at any time after the Plan Effective Date shall
automatically be granted, on the date of such initial election or appointment, a
Non-Statutory Option to purchase ten thousand (10,000) shares of Class B Common
Stock, provided that individual is not then in the employ of the Corporation or
any Parent or Subsidiary.

           2.  On the date of each Annual Stockholders Meeting held after the
Underwriting Date, each individual who is to continue to serve as a non-employee
Board member, whether or not that individual is standing for re-election to the
Board at that particular Annual Meeting, shall automatically be granted a Non-
Statutory Option to purchase seven thousand (7,000) shares of Class B Common
Stock. There shall be no limit on the number of such 7,000-share option grants
any one non-employee Board member may receive over his or her period of Board
service, and non-employee Board members who have previously been in the employ
of the Corporation (or any Parent or Subsidiary) shall be eligible to receive
one or more such annual option grants over their period of continued Board
service.

       B.  EXERCISE PRICE.
           -------------- 

           1.  The exercise price per share shall be equal to one hundred
percent (100%) of the Fair Market Value per share of Class B Common Stock on the
option grant date.

           2.  The exercise price shall be payable in one or more of the
alternative forms authorized under the Discretionary Option Grant Program.
Except to the extent the sale and remittance procedure specified thereunder is
utilized, payment of the exercise price for the purchased shares must be made on
the Exercise Date.

       C.  OPTION TERM.  Each option shall have a term of ten (10) years 
           -----------
measured from the option grant date.

       D.  EXERCISE AND VESTING OF OPTIONS.  Each initial 10,000-share option 
           -------------------------------
grant shall be immediately exercisable for any or all of the option shares as
fully-vested shares of Class B Common Stock and shall remain so exercisable
until the expiration or sooner termination of the option term. Each annual 
7,000-share option grant shall also be immediately exercisable for any or all of
the option shares. However, the shares of Class B Common Stock purchased under
each annual 7,000-share option grant shall be subject to repurchase by the
Corporation, at the exercise price paid per share, upon the Optionee's cessation
of Board service prior to vesting in those shares. 
<PAGE>
 
Each annual 7,000-share grant shall vest, and the Corporation's repurchase right
shall lapse, in a series of four (4) successive equal annual installments upon
the Optionee's completion of each year of Board service over the four (4)-year
period measured from the option grant date.
 
       E.  TERMINATION OF BOARD SERVICE.  The following provisions shall govern 
           ---------------------------- 
the exercise of any options held by the Optionee at the time the Optionee ceases
to serve as a Board member:

           (i)  The Optionee (or, in the event of Optionee's death, the personal
       representative of the Optionee's estate or the person or persons to whom
       the option is transferred pursuant to the Optionee's will or in
       accordance with the laws of descent and distribution) shall have a twelve
       (12)-month period following the date of such cessation of Board service
       in which to exercise each such option.

           (ii)  During the twelve (12)-month exercise period, the option may 
       not be exercised in the aggregate for more than the number of vested
       shares of Class B Common Stock for which the option is exercisable at the
       time of the Optionee's cessation of Board service.

           (iii) Should the Optionee cease to serve as a Board member by reason
       of death or Permanent Disability, then all shares at the time subject to
       the option shall immediately vest so that such option may, during the
       twelve (12)-month exercise period following such cessation of Board
       service, be exercised for all or any portion of those shares as fully-
       vested shares of Class B Common Stock.

           (iv)  In no event shall the option remain exercisable after the
       expiration of the option term. Upon the expiration of the twelve (12)-
       month exercise period or (if earlier) upon the expiration of the option
       term, the option shall terminate and cease to be outstanding for any
       vested shares for which the option has not been exercised. However, the
       option shall, immediately upon the Optionee's cessation of Board service
       for any reason other than death or Permanent Disability, terminate and
       cease to be outstanding to the extent the option is not otherwise at that
       time exercisable for vested shares.
<PAGE>
 
II.    CORPORATE TRANSACTION/CHANGE IN CONTROL/HOSTILE TAKEOVER

       A.  In the event of any Corporate Transaction, the shares of Class B
Common Stock at the time subject to each outstanding option but not otherwise
vested shall automatically vest in full so that each such option shall,
immediately prior to the effective date of the Corporate Transaction, become
fully exercisable for all of the shares of Class B Common Stock at the time
subject to such option and may be exercised for all or any portion of those
shares as fully-vested shares of Class B Common Stock. Immediately following the
consummation of the Corporate Transaction, each automatic option grant shall
terminate and cease to be outstanding, except to the extent assumed by the
successor corporation (or parent thereof).

       B.  In connection with any Change in Control, the shares of Class B
Common Stock at the time subject to each outstanding option but not otherwise
vested shall automatically vest in full so that each such option shall,
immediately prior to the effective date of the Change in Control, become fully
exercisable for all of the shares of Class B Common Stock at the time subject to
such option and may be exercised for all or any portion of those shares as 
fully-vested shares of Class B Common Stock. Each such option shall remain 
exercisable for such fully-vested option shares until the expiration or sooner
termination of the option term or the surrender of the option in connection with
a Hostile Takeover.

       C.  Upon the occurrence of a Hostile Takeover, the Optionee shall have a
thirty (30)-day period in which to surrender to the Corporation each of his or
her outstanding automatic option grants. The Optionee shall in return be
entitled to a cash distribution from the Corporation in an amount equal to the
excess of (i) the Takeover Price of the shares of Class B Common Stock at the
time subject to each surrendered option (whether or not the Optionee is
otherwise at the time vested in those shares) over (ii) the aggregate exercise
price payable for such shares. Such cash distribution shall be paid within five
(5) days following the surrender of the option to the Corporation. Shareholder
approval of the Plan shall constitute pre-approval of the grant of each such
option surrender right under this Automatic Option Grant Program and the
subsequent exercise of such right in accordance with the terms and provisions of
this Section II.C. No additional approval of the Board or any Plan Administrator
shall be required at the time of the actual option surrender and cash
distribution.

       D.  Each option which is assumed in connection with a Corporate
Transaction shall be appropriately adjusted, immediately after such Corporate
Transaction, to apply to the number and class of securities which would have
been issuable to the Optionee in consummation of such Corporate Transaction had
the option been exercised immediately prior to such Corporate Transaction.
Appropriate adjustments shall also be made to the exercise price payable per
share under each outstanding option, provided the aggregate exercise price
                                     --------
payable for such securities shall remain the same.

       E.  The grant of options under the Automatic Option Grant Program shall
in no 
<PAGE>
 
way affect the right of the Corporation to adjust, reclassify, reorganize or
otherwise change its capital or business structure or to merge, consolidate,
dissolve, liquidate or sell or transfer all or any part of its business or
assets.

III.   REMAINING TERMS

       The remaining terms of each option granted under the Automatic Option
Grant Program shall be the same as the terms in effect for option grants made
under the Discretionary Option Grant Program.
<PAGE>
 
                                 ARTICLE FIVE

                                 MISCELLANEOUS
                                 -------------

I.     FINANCING

       The Plan Administrator may permit any Optionee or Participant to pay the
option exercise price under the Discretionary Option Grant Program or the
purchase price of shares issued under the Stock Issuance Program by delivering a
full-recourse, interest bearing promissory note payable in one or more
installments. The terms of any such promissory note (including the interest rate
and the terms of repayment) shall be established by the Plan Administrator in
its sole discretion. In no event may the maximum credit available to the
Optionee or Participant exceed the sum of (i) the aggregate option exercise
price or purchase price payable for the purchased shares plus (ii) any Federal,
state and local income and employment tax liability incurred by the Optionee or
the Participant in connection with the option exercise or share purchase.

II.    TAX WITHHOLDING

       A.  The Corporation's obligation to deliver shares of Class B Common
Stock upon the exercise of options or the issuance or vesting of such shares
under the Plan shall be subject to the satisfaction of all applicable Federal,
state and local income and employment tax withholding requirements.

       B.  The Plan Administrator may, in its discretion, provide any or all
holders of Non-Statutory Options or unvested shares of Class B Common Stock
under the Plan (other than the options granted or the shares issued under the
Automatic Option Grant Program) with the right to use shares of Class B Common
Stock in satisfaction of all or part of the Taxes incurred by such holders in
connection with the exercise of their options or the vesting of their shares.
Such right may be provided to any such holder in either or both of the following
formats:

           Stock Withholding:  The election to have the Corporation withhold, 
           -----------------
from the shares of Class B Common Stock otherwise issuable upon the exercise of
such Non-Statutory Option or the vesting of such shares, a portion of those
shares with an aggregate Fair Market Value equal to the percentage of the Taxes
(not to exceed one hundred percent (100%)) designated by the holder.

           Stock Delivery:  The election to deliver to the Corporation, at the
           --------------
time the Non-Statutory Option is exercised or the shares vest, one or more
shares of Class B Common Stock or Common Stock previously acquired by such
holder (other than in connection with the option exercise or share vesting
triggering the Taxes) with an aggregate Fair Market Value equal to the
percentage of the Taxes (not to exceed one hundred percent (100%)) designated by
the holder.

III.   EFFECTIVE DATE AND TERM OF THE PLAN
<PAGE>
 
       A.  The Plan shall become effective immediately upon the Plan Effective
Date, and options may be granted under the Discretionary Option Grant and
Automatic Option Grant Programs at any time on or after the Plan Effective Date.
However, no options granted under the Plan may be exercised, and no shares shall
be issued under the Stock Issuance Program, until the Plan is approved by the
Corporation's stockholders. If such stockholder approval is not obtained within
twelve (12) months after the Plan Effective Date, then all options previously
granted under the Discretionary Option Grant or Automatic Option Grant Program
shall terminate and cease to be outstanding, and no further options shall be
granted and no shares shall be issued under the Plan.

       B.  The Plan shall terminate upon the earliest of (i) December 18, 
                                             --------
2006, (ii) the date on which all shares available for issuance under the Plan
shall have been issued as fully-vested shares or (iii) the termination of all
outstanding options in connection with a Corporate Transaction. Upon such a
clause (i) plan termination, any outstanding option grants and unvested stock
issuances shall thereafter continue to have force and effect in accordance with
the provisions of the documents evidencing such grants or issuances.

IV.    AMENDMENT OF THE PLAN

       A.  The Board shall have complete and exclusive power and authority to 
amend or modify the Plan in any or all respects. However, no such amendment or
modification shall adversely affect the rights and obligations with respect to
stock options or unvested stock issuances at the time outstanding under the Plan
unless the Optionee or the Participant consents to such amendment or
modification. In addition, certain amendments may require stockholder approval
pursuant to applicable laws or regulations.

       B.  Options to purchase shares of Class B Common Stock may be granted
under the Discretionary Option Grant Program and shares of Class B Common Stock
may be issued under the Stock Issuance Program that are in each instance in
excess of the number of shares then available for issuance under the Plan,
provided any excess shares actually issued under those programs shall be held in
escrow until there is obtained stockholder approval of an amendment sufficiently
increasing the number of shares of Class B Common Stock available for issuance
under the Plan. If such stockholder approval is not obtained within twelve (12)
months after the date the first such excess issuances are made, then (i) any
unexercised options granted on the basis of such excess shares shall terminate
and cease to be outstanding and (ii) the Corporation shall promptly refund to
the Optionees and the Participants the exercise or purchase price paid for any
excess shares issued under the Plan and held in escrow, together with interest
(at the applicable Short Term Federal Rate) for the period the shares were held
in escrow, and such shares shall thereupon be automatically cancelled and cease
to be outstanding.

V.     USE OF PROCEEDS

       Any cash proceeds received by the Corporation from the sale of shares of
Class B Common Stock under the Plan shall be used for general corporate
purposes.
<PAGE>
 
VI.    REGULATORY APPROVALS

       A.  The implementation of the Plan, the granting of any stock option
under the Plan and the issuance of any shares of Class B Common Stock (i) upon
the exercise of any granted option or (ii) under the Stock Issuance Program
shall be subject to the Corporation's procurement of all approvals and permits
required by regulatory authorities having jurisdiction over the Plan, the stock
options granted under it and the shares of Class B Common Stock issued pursuant
to it.

       B.  No shares of Class B Common Stock or other assets shall be issued or
delivered under the Plan unless and until there shall have been compliance with
all applicable requirements of Federal and state securities laws, including the
filing and effectiveness of the Form S-8 registration statement for the shares
of Class B Common Stock issuable under the Plan, and all applicable listing
requirements of any stock exchange (or the Nasdaq National Market, if
applicable) on which Class B Common Stock is then listed for trading.

VII.   NO EMPLOYMENT/SERVICE RIGHTS

       Nothing in the Plan shall confer upon the Optionee or the Participant any
right to continue in Service for any period of specific duration or interfere
with or otherwise restrict in any way the rights of the Corporation (or any
Parent or Subsidiary employing or retaining such person) or of the Optionee or
the Participant, which rights are hereby expressly reserved by each, to
terminate such person's Service at any time for any reason, with or without
cause.
<PAGE>
 
                                   APPENDIX
                                   --------

       The following definitions shall be in effect under the Plan:

       A.  AUTOMATIC OPTION GRANT PROGRAM shall mean the automatic option 
           ------------------------------
grant program in effect under the Plan.

       B.  BOARD shall mean the Corporation's Board of Directors.
           -----                                                 

       C.  CHANGE IN CONTROL shall mean a change in ownership or control of the
           -----------------                                                   
Corporation effected through either of the following transactions:

           (i)   the acquisition, directly or indirectly by any person or
       related group of persons (other than the Corporation or a person that
       directly or indirectly controls, is controlled by, or is under common
       control with, the Corporation), of beneficial ownership (within the
       meaning of Rule 13d-3 of the 1934 Act) of securities possessing more than
       fifty percent (50%) of the total combined voting power of the
       Corporation's outstanding securities pursuant to a tender or exchange
       offer made directly to the Corporation's stockholders, or

           (ii)  a change in the composition of the Board over a period of
       thirty-six (36) consecutive months or less such that a majority of the
       Board members ceases, by reason of one or more contested elections for
       Board membership, to be comprised of individuals who either (A) have been
       Board members continuously since the beginning of such period or (B) have
       been elected or nominated for election as Board members during such
       period by at least a majority of the Board members described in clause
       (A) who were still in office at the time the Board approved such election
       or nomination.

       D.  CODE shall mean the Internal Revenue Code of 1986, as amended.
           ----                                                          

       E.  CLASS B COMMON STOCK shall mean the Corporation's Class B common 
           --------------------
stock.

       F.  COMMON STOCK shall mean the Corporation's common stock.
           ------------                                           

       G.  CORPORATE TRANSACTION shall mean either of the following 
           ---------------------                                               
stockholder-approved transactions to which the Corporation is a party:

           (i)   a merger or consolidation in which securities possessing more
       than fifty percent (50%) of the total combined voting power of the
       Corporation's outstanding securities are transferred to a person or
       persons different from the persons holding those securities immediately
       prior to such transaction, or
<PAGE>
 
           (ii)  the sale, transfer or other disposition of all or substantially
       all of the Corporation's assets in complete liquidation or dissolution of
       the Corporation.

       H.  CORPORATION shall mean ATL Products, Inc., a Delaware corporation, 
           -----------
and any successor corporation which shall assume the Plan and the outstanding
options and stock issuances under the Plan.

       I.  DISCRETIONARY OPTION GRANT PROGRAM shall mean the discretionary 
           ----------------------------------                           
option grant program in effect under the Plan.

       J.  ELIGIBLE DIRECTOR shall mean a non-employee Board member eligible to
           -----------------                                                   
participate in the Automatic Option Grant Program in accordance with the
eligibility provisions of Article One.

       K.  EMPLOYEE shall mean an individual who is in the employ of the 
           -------- 
Corporation (or any Parent or Subsidiary), subject to the control and direction
of the employer entity as to both the work to be performed and the manner and
method of performance.

       L.  EXERCISE DATE shall mean the date on which the Corporation shall have
           -------------                                                        
received written notice of the option exercise.

       M.  FAIR MARKET VALUE per share of Class B Common Stock or Common 
           -----------------
Stock on any relevant date shall be determined in accordance with the following
provisions:

           (i)   If the Class B Common Stock or Common Stock is at the time
       traded on the Nasdaq National Market, then the Fair Market Value shall be
       deemed equal to the closing selling price per share of Class B Common
       Stock or Common Stock on the date in question, as such price is reported
       on the Nasdaq National Market or any successor system. If there is no
       closing selling price for the Class B Common Stock or Common Stock on the
       date in question, then the Fair Market Value shall be the closing selling
       price on the last preceding date for which such quotation exists.

           (ii)  If the Class B Common Stock or Common Stock is at the time
       listed on any Stock Exchange, then the Fair Market Value shall be deemed
       equal to the closing selling price per share of Class B Common Stock or
       Common Stock on the date in question on the Stock Exchange determined by
       the Plan Administrator to be the primary market for the Class B Common
       Stock or Common Stock, as such price is officially quoted in the
       composite tape of transactions on such exchange. If there is no closing
       selling price for the Class B Common Stock or Common Stock on the date in
       question, then the Fair Market Value shall be the closing selling price
       on the last preceding date for which such quotation exists.
<PAGE>
 
           (iii) If the Fair Market Value of Class B Common Stock or Common
       Stock is not determinable pursuant to subparagraph (i) or (ii) of this
       provision, then the Fair Market Value shall be determined by the Plan
       Administrator, after taking into account such factors as it shall deem
       appropriate.

       N.  HOSTILE TAKEOVER shall mean the acquisition, directly or indirectly, 
           ---------------- 
by any person or related group of persons (other than the Corporation or a
person that directly or indirectly controls, is controlled by, or is under
common control with, the Corporation) of beneficial ownership (within the
meaning of Rule 13d-3 of the 1934 Act) of securities possessing more than fifty
percent (50%) of the total combined voting power of the Corporation's
outstanding securities pursuant to a tender or exchange offer made directly to
the Corporation's stockholders which the Board does not recommend such
stockholders to accept.

       O.  INCENTIVE OPTION shall mean an option which satisfies the 
           ----------------
requirements of Code Section 422.

       P.  INVOLUNTARY TERMINATION shall mean the termination of the Service of
           -----------------------
any individual which occurs by reason of:

           (i)   such individual's involuntary dismissal or discharge by the
       Corporation for reasons other than Misconduct, or

           (ii)  such individual's voluntary resignation following (A) a change
       in his or her position with the Corporation which materially reduces his
       or her level of responsibility, (B) a reduction in his or her level of
       compensation (including base salary, fringe benefits and target bonus
       under any corporate-performance based bonus or incentive programs) by
       more than fifteen percent (15%) or (C) a relocation of such individual's
       place of employment by more than fifty (50) miles, provided and only if
       such change, reduction or relocation is effected by the Corporation
       without the individual's consent.

       Q.  MISCONDUCT shall mean the commission of any act of fraud, 
           ----------
embezzlement or dishonesty by the Optionee or Participant or any other
intentional misconduct by such person adversely affecting the business or
affairs of the Corporation (or any Parent or Subsidiary) in a material manner.

       R.  1934 ACT shall mean the Securities Exchange Act of 1934, as amended.
           --------                                                            

       S.  NON-STATUTORY OPTION shall mean an option not intended to satisfy the
           --------------------
requirements of Code Section 422.

       T.  OPTIONEE shall mean any person to whom an option is granted under the
           --------                                                             
Discretionary Option Grant, Automatic Option Grant or Director Fee Option Grant
Program.
<PAGE>
 
       U.  PARENT shall mean any corporation (other than the Corporation) in an
           ------                                                              
unbroken chain of corporations ending with the Corporation, provided each
corporation in the unbroken chain (other than the Corporation) owns, at the time
of the determination, stock possessing fifty percent (50%) or more of the total
combined voting power of all classes of stock in one of the other corporations
in such chain.

       V.  PARTICIPANT shall mean any person who is issued shares of Class B 
           ----------- 
Common Stock under the Stock Issuance Program.

       W.  PERMANENT DISABILITY OR PERMANENTLY DISABLED shall mean the 
           -------------------------------------------- 
inability of the Optionee or the Participant to engage in any substantial
gainful activity by reason of any medically determinable physical or mental
impairment expected to result in death or to be of continuous duration of twelve
(12) months or more. However, solely for purposes of the Automatic Option Grant
Program, Permanent Disability or Permanently Disabled shall mean the inability
of the non-employee Board member to perform his or her usual duties as a Board
member by reason of any medically determinable physical or mental impairment
expected to result in death or to be of continuous duration of twelve (12)
months or more.

       X.  PLAN shall mean the Corporation's 1996 Stock Incentive Plan, as set 
           ----
forth in this document.

       Y.  PLAN ADMINISTRATOR shall mean the particular entity, whether the 
           ------------------
Primary Committee, the Board or the Secondary Committee, which is authorized to
administer the Discretionary Option Grant and Stock Issuance Programs with
respect to one or more classes of eligible persons, to the extent such entity is
carrying out its administrative functions under those programs with respect to
the persons under its jurisdiction.

       Z.  PLAN EFFECTIVE DATE shall mean December 19, 1996, the date on which
           -------------------  
the Plan was adopted by the Board.

       AA. PRIMARY COMMITTEE shall mean the committee of two (2) or more non-
           -----------------                                                
employee Board members appointed by the Board to administer the Discretionary
Option Grant and Stock Issuance Programs with respect to Section 16 Insiders.

       BB. SECONDARY COMMITTEE shall mean a committee of one (1) or more Board
           -------------------                                                
members appointed by the Board to administer the Discretionary Option Grant and
Stock Issuance Programs with respect to eligible persons other than Section 16
Insiders.

       CC. SECTION 12 REGISTRATION DATE shall mean the date on which the Class B
           ----------------------------                                         
Common Stock is first registered under Section 12(g) of Section 16 of the 1934
Act.

       DD. SECTION 16 INSIDER shall mean an officer or director of the 
           ------------------ 
Corporation subject to the short-swing profit liabilities of Section 16 of the
1934 Act.
<PAGE>
 
       EE.  SERVICE shall mean the performance of services for the Corporation 
            -------
(or any Parent or Subsidiary) by a person in the capacity of an Employee, a non-
employee member of the board of directors or a consultant or independent
advisor, except to the extent otherwise specifically provided in the documents
evidencing the option grant or stock issuance.

       FF.  STOCK EXCHANGE shall mean either the American Stock Exchange or 
            --------------
the New York Stock Exchange.

       GG.  STOCK ISSUANCE AGREEMENT shall mean the agreement entered into by 
            ------------------------
the Corporation and the Participant at the time of issuance of shares of Class B
Common Stock under the Stock Issuance Program.

       HH.  STOCK ISSUANCE PROGRAM shall mean the stock issuance program in 
            ---------------------- 
effect under the Plan.

       II.  SUBSIDIARY shall mean any corporation (other than the Corporation) 
            ---------- 
in an unbroken chain of corporations beginning with the Corporation, provided
each corporation (other than the last corporation) in the unbroken chain owns,
at the time of the determination, stock possessing fifty percent (50%) or more
of the total combined voting power of all classes of stock in one of the other
corporations in such chain.

       JJ.  TAKEOVER PRICE shall mean the greater of (i) the Fair Market Value 
            --------------                -------                       
per share of Class B Common Stock on the date the option is surrendered to the
Corporation in connection with a Hostile Takeover or (ii) the highest reported
price per share of Class B Common Stock paid by the tender offeror in effecting
such Hostile Takeover. However, if the surrendered option is an Incentive
Option, the Takeover Price shall not exceed the clause (i) price per share.

       KK.  TAXES shall mean the Federal, state and local income and 
            ----- 
employment tax liabilities incurred by the holder of Non-Statutory Options or
unvested shares of Class B Common Stock in connection with the exercise of those
options or the vesting of those shares.

       LL.  10% STOCKHOLDER shall mean the owner of stock (as determined under
            --------------- 
Code Section 424(d)) possessing more than ten percent (10%) of the total
combined voting power of all classes of stock of the Corporation (or any Parent
or Subsidiary).

       MM.  UNDERWRITING AGREEMENT shall mean the agreement between the 
            ----------------------
Corporation and the underwriter or underwriters managing the initial public
offering of the Common Stock.

       NN.  UNDERWRITING DATE shall mean the date on which the Underwriting 
            -----------------
Agreement is executed and priced in connection with an initial public offering
of the Common Stock.
<PAGE>
 
                              ATL PRODUCTS, INC.
                           1996 STOCK INCENTIVE PLAN
                                PLAN AMENDMENT
                                --------------

      The 1996 Stock Incentive Plan of ATL Products, Inc. (the "Plan") is hereby
amended, effective July 25, 1997 as follows:

      1.  Article One, Section V.A. of the Plan is hereby amended to read as
follows:

          V.   STOCK SUBJECT TO THE PLAN
               -------------------------

               A.   The stock issuable under the Plan shall be shares of
       authorized but unissued or reacquired Class B Common Stock, including
       shares repurchased by the Corporation on the open market. The maximum
       number of shares of Class B Common Stock reserved for issuance over the
       term of the Plan shall not exceed Eight Hundred Seventy-Nine Thousand
       (879,000) shares.


       2.  Article One, Section II.A.(iii) and Article Three of the Plan are
hereby deleted in their entirety, and all references throughout the Plan to the
Automatic Option Grant Program and the automatic option grants issuable
thereunder are hereby deleted from the Plan.

       3.  Except as modified by this Plan Amendment, all the terms and
provisions of the Plan as in effect on the date hereof shall continue in full
force and effect.

       IN WITNESS WHEREOF, ATL Products, Inc. has caused this Plan Amendment 
to be executed on its behalf by its duly authorized officer effective as of the
date first written above.

                                    ATL PRODUCTS, INC.



                                    By: /s/ Kevin C. Daly
                                        ---------------------------------------
                                          Kevin C. Daly, Ph.D
                                          Chief Executive Officer and President

<PAGE>
 
                                                                     EXHIBIT 4.2


                              ATL PRODUCTS, INC.
                           1997 STOCK INCENTIVE PLAN
                           -------------------------


                                  ARTICLE ONE

                              GENERAL PROVISIONS
                              ------------------


     I.   PURPOSE OF THE PLAN

          This 1997 Stock Incentive Plan is intended to promote the interests of
ATL Products, Inc., a Delaware corporation, by providing eligible persons with
the opportunity to acquire a proprietary interest, or otherwise increase their
proprietary interest, in the Corporation as an incentive for them to remain in
the service of the Corporation.

          Capitalized terms shall have the meanings assigned to such terms in
the attached Appendix.

     II.  STRUCTURE OF THE PLAN

          A.  The Plan shall be divided into three separate equity programs:

              -     the Discretionary Option Grant Program under which eligible
persons may, at the discretion of the Plan Administrator, be granted options to
purchase shares of Class A Common Stock,

              -     the Stock Issuance Program under which eligible persons may,
at the discretion of the Plan Administrator, be issued shares of Class A Common
Stock directly, either through the immediate purchase of such shares or as a
bonus for services rendered the Corporation (or any Parent or Subsidiary), and

              -     the Automatic Option Grant Program under which eligible non-
employee Board members shall automatically receive option grants at periodic
intervals to purchase shares of Class A Common Stock.

          B.  The provisions of Articles One and Five shall apply to all equity
programs under the Plan and shall govern the interests of all persons under the
Plan.
<PAGE>
 
   III.  ADMINISTRATION OF THE PLAN

         A.  The Primary Committee shall have sole and exclusive authority to
administer the Discretionary Option Grant and Stock Issuance Programs with
respect to Section 16 Insiders.  Administration of the Discretionary Option
Grant and Stock Issuance Programs with respect to all other persons eligible to
participate in those programs may, at the Board's discretion, be vested in the
Primary Committee or a Secondary Committee, or the Board may retain the power to
administer those programs with respect to all such persons.

         B.  Members of the Primary Committee or any Secondary Committee shall
serve for such period of time as the Board may determine and may be removed by
the Board at any time. The Board may also at any time terminate the functions of
any Secondary Committee and reassume all powers and authority previously
delegated to such committee.

         C.  Each Plan Administrator shall, within the scope of its
administrative functions under the Plan, have full power and authority (subject
to the provisions of the Plan) to establish such rules and regulations as it may
deem appropriate for proper administration of the Discretionary Option Grant and
Stock Issuance Programs and to make such determinations under, and issue such
interpretations of, the provisions of such programs and any outstanding options
or stock issuances thereunder as it may deem necessary or advisable. Decisions
of the Plan Administrator within the scope of its administrative functions under
the Plan shall be final and binding on all parties who have an interest in the
Discretionary Option Grant and Stock Issuance Programs under its jurisdiction or
any option or stock issuance thereunder.

         D.  Service on the Primary Committee or the Secondary Committee shall
constitute service as a Board member, and members of each such committee shall
accordingly be entitled to full indemnification and reimbursement as Board
members for their service on such committee.  No member of the Primary Committee
or the Secondary Committee shall be liable for any act or omission made in good
faith with respect to the Plan or any option grants or stock issuances under the
Plan.

         E.  Administration of the Automatic Option Grant Program shall be self-
executing in accordance with the terms of that program, and no Plan
Administrator shall exercise any discretionary functions with respect to any
option grants or stock issuances made under such program.

     IV. ELIGIBILITY

         A.  The persons eligible to participate in the Discretionary Option
Grant and Stock Issuance Programs are as follows:

                    (i)  employees,

                                       2
<PAGE>
 
               (ii) non-employee members of the Board or the board of directors
     of any Parent or Subsidiary, and

               (iii)  consultants and other independent advisors who provide
     services to the Corporation (or any Parent or Subsidiary).

          B.   Each Plan Administrator shall, within the scope of its
administrative jurisdiction under the Plan, have full authority to determine,
(i) with respect to the option grants under the Discretionary Option Grant
Program, which eligible persons are to receive option grants, the time or times
when such option grants are to be made, the number of shares to be covered by
each such grant, the status of the granted option as either an Incentive Option
or a Nonstatutory Option, the time or times when each option is to become
exercisable, the vesting schedule (if any) applicable to the option shares and
the maximum term for which the option is to remain outstanding and (ii) with
respect to stock issuances under the Stock Issuance Program, which eligible
persons are to receive stock issuances, the time or times when such issuances
are to be made, the number of shares to be issued to each Participant, the
vesting schedule (if any) applicable to the issued shares and the consideration
to be paid for such shares.

          C.   The Plan Administrator shall have the absolute discretion either
to grant options in accordance with the Discretionary Option Grant Program or to
effect stock issuances in accordance with the Stock Issuance Program.

          D.   The individuals who shall be eligible to participate in the
Automatic Option Grant Program shall be limited to (i) those individuals serving
as non-employee Board members on the Plan Effective Date, (ii) those individuals
who first become non-employee Board members on or after the Plan Effective Date,
whether through appointment by the Board or election by the Corporation's
stockholders, and (ii) those individuals who continue to serve as non-employee
Board members at one or more Annual Stockholders Meetings held after the Plan
Effective Date.

     V.   STOCK SUBJECT TO THE PLAN

          A.   The stock issuable under the Plan shall be shares of authorized
but unissued or reacquired Class A Common Stock, including shares repurchased by
the Corporation on the open market.  The maximum number of shares of Class A
Common Stock reserved for issuance over the term of the Plan shall not exceed
200,000 shares, subject to certain changes in the Corporation's capital
structure.

          B.   No one person participating in the Plan may receive options,
separately exercisable stock appreciation rights and direct stock issuances for
more than 50,000 shares of Class A Common Stock in the aggregate per calendar
year, beginning with the 1997 calendar year.

                                       3
<PAGE>
 
          C.  Shares of Class A Common Stock subject to outstanding options
shall be available for subsequent issuance under the Plan to the extent (i)
those options expire or terminate for any reason prior to exercise in full or
(ii) those options are cancelled in accordance with the cancellation/regrant
provisions of Section IV of Article Two.  Unvested shares issued under the Plan
and subsequently cancelled or repurchased by the Corporation, at the original
exercise or direct issue price paid per share, pursuant to the Corporation's
repurchase rights under the Plan shall be added back to the number of shares of
Class A Common Stock reserved for issuance under the Plan and shall accordingly
be available for reissuance through one or more subsequent option grants or
direct stock issuances under the Plan.  However, shares subject to any options
surrendered in connection with the stock appreciation right provisions of the
Plan shall not be available for reissuance.  Should the exercise price of an
option under the Plan be paid with shares of Class A Common Stock or should
shares of Class A Common Stock otherwise issuable under the Plan be withheld by
the Corporation in satisfaction of the withholding taxes incurred in connection
with the exercise of an option or the vesting of a stock issuance under the
Plan, then the number of shares of Class A Common Stock available for issuance
under the Plan shall be reduced by the gross number of shares for which the
option is exercised or which vest under the stock issuance, and not by the net
number of shares of Class A Common Stock issued to the holder of such option or
stock issuance.

          D.  If any change is made to the Class A Common Stock by reason of any
stock split, stock dividend, recapitalization, combination of shares, exchange
of shares or other change affecting the outstanding Class A Common Stock as a
class without the Corporation's receipt of consideration, appropriate
adjustments shall be made to (i) the maximum number and/or class of securities
issuable under the Plan, (ii) the number and/or class of securities for which
any one person may be granted stock options, separately exercisable stock
appreciation rights and direct stock issuances under the Plan per calendar year,
(iii) the number and/or class of securities for which grants are subsequently to
be made under the Automatic Option Grant Program to new and continuing non-
employee Board members, and (iv) the number and/or class of securities and the
exercise price per share in effect under each outstanding option under the Plan.
Such adjustments to the outstanding options are to be effected in a manner which
shall preclude the enlargement or dilution of rights and benefits under such
options. The adjustments determined by the Plan Administrator shall be final,
binding and conclusive.

                                       4
<PAGE>
 
                                  ARTICLE TWO

                      DISCRETIONARY OPTION GRANT PROGRAM
                      ----------------------------------

     I.   OPTION TERMS

          Each option shall be evidenced by one or more documents in the form
approved by the Plan Administrator; provided, however, that each such document
                                    --------                                  
shall comply with the terms specified below.  Each document evidencing an
Incentive Option shall, in addition, be subject to the provisions of the Plan
applicable to such options.

          A.   EXERCISE PRICE.
               -------------- 

          1.  The exercise price per share shall be fixed by the Plan
Administrator but shall not be less than one hundred percent (100%) of the Fair
Market Value per share of Class A Common Stock on the option grant date.

          2.  The exercise price shall become immediately due upon exercise of
the option and shall, subject to the provisions of Section I of Article Five and
the documents evidencing the option, be payable in one or more of the forms
specified below:

               (i)   cash or check made payable to the Corporation,

               (ii)  shares of Class A Common Stock held for the requisite
     period necessary to avoid a charge to the Corporation's earnings for
     financial reporting purposes and valued at Fair Market Value on the
     Exercise Date, or

               (iii) to the extent the option is exercised for vested shares,
     through a special sale and remittance procedure pursuant to which the
     Optionee shall concurrently provide irrevocable instructions to (a) a
     Corporation designated brokerage firm to effect the immediate sale of the
     purchased shares and remit to the Corporation, out of the sale proceeds
     available on the settlement date, sufficient funds to cover the aggregate
     exercise price payable for the purchased shares plus all applicable
     Federal, state and local income and employment taxes required to be
     withheld by the Corporation by reason of such exercise and (b) the
     Corporation to deliver the certificates for the purchased shares directly
     to such brokerage firm in order to complete the sale.

          Except to the extent such sale and remittance procedure is utilized,
payment of the exercise price for the purchased shares must be made on the
Exercise Date.

                                       5
<PAGE>
 
          B.  EXERCISE AND TERM OF OPTIONS.  Each option shall be exercisable at
              ----------------------------                                      
such time or times, during such period and for such number of shares as shall be
determined by the Plan Administrator and set forth in the documents evidencing
the option.  However, no option shall have a term in excess of ten (10) years
measured from the option grant date.

          C.   EFFECT OF TERMINATION OF SERVICE.
               -------------------------------- 

               1.  The following provisions shall govern the exercise of any
options held by the Optionee at the time of cessation of Service or death:

               (i)   Any option outstanding at the time of the Optionee's
     cessation of Service for any reason shall remain exercisable for such
     period of time thereafter as shall be determined by the Plan Administrator
     and set forth in the documents evidencing the option, but no such option
     shall be exercisable after the expiration of the option term.

               (ii)   Any option exercisable in whole or in part by the Optionee
     at the time of death may be subsequently exercised by the personal
     representative of the Optionee's estate or by the person or persons to whom
     the option is transferred pursuant to the Optionee's will or in accordance
     with the laws of descent and distribution.

               (iii)  During the applicable post-Service exercise period, the
     option may not be exercised in the aggregate for more than the number of
     vested shares for which the option is exercisable on the date of the
     Optionee's cessation of Service.  Upon the expiration of the applicable
     exercise period or (if earlier) upon the expiration of the option term, the
     option shall terminate and cease to be outstanding for any vested shares
     for which the option has not been exercised.  However, the option shall,
     immediately upon the Optionee's cessation of Service, terminate and cease
     to be outstanding to the extent the option is not otherwise at that time
     exercisable for vested shares.

               (iv)   Should the Optionee's Service be terminated for
     Misconduct, then all outstanding options held by the Optionee shall
     terminate immediately and cease to be outstanding.

               2.  The Plan Administrator shall have complete discretion,
exercisable either at the time an option is granted or at any time while the
option remains outstanding, to:

               (i)  extend the period of time for which the option is to remain
     exercisable following the Optionee's cessation of Service from the limited
     exercise period otherwise in effect for that option to such greater period
     of time as the Plan Administrator shall deem appropriate, but in no event
     beyond the expiration of the option term, and/or

                                       6
<PAGE>
 
               (ii) permit the option to be exercised, during the applicable
     post-Service exercise period, not only with respect to the number of vested
     shares of Class A Common Stock for which such option is exercisable at the
     time of the Optionee's cessation of Service but also with respect to one or
     more additional installments in which the Optionee would have vested had
     the Optionee continued in Service.

          D.   STOCKHOLDER RIGHTS.  The holder of an option shall have no
               ------------------                                        
stockholder rights with respect to the shares subject to the option until such
person shall have exercised the option, paid the exercise price and become a
holder of record of the purchased shares.

          E.   REPURCHASE RIGHTS.  The Plan Administrator shall have the
               -----------------                                        
discretion to grant options which are exercisable for unvested shares of Class A
Common Stock.  Should the Optionee cease Service while holding such unvested
shares, the Corporation shall have the right to repurchase, at the exercise
price paid per share, any or all of those unvested shares.  The terms upon which
such repurchase right shall be exercisable (including the period and procedure
for exercise and the appropriate vesting schedule for the purchased shares)
shall be established by the Plan Administrator and set forth in the document
evidencing such repurchase right.

          F.   LIMITED TRANSFERABILITY OF OPTIONS.  During the lifetime of the
               ----------------------------------                             
Optionee, Incentive Options shall be exercisable only by the Optionee and shall
not be assignable or transferable other than by will or by the laws of descent
and distribution following the Optionee's death.  However, a Nonstatutory Option
may, in connection with the Optionee's estate plan, be assigned in whole or in
part during the Optionee's lifetime to one or more members of the Optionee's
immediate family or to a trust established exclusively for one or more such
family members.  The assigned portion may only be exercised by the person or
persons who acquire a proprietary interest in the option pursuant to the
assignment. The terms applicable to the assigned portion shall be the same as
those in effect for the option immediately prior to such assignment and shall be
set forth in such documents issued to the assignee as the Plan Administrator may
deem appropriate.

     II.  INCENTIVE OPTIONS

          The terms specified below shall be applicable to all Incentive
Options.  Except as modified by the provisions of this Section II, all the
provisions of Articles One, Two and Five shall be applicable to Incentive
Options.  Options which are specifically designated as Nonstatutory Options when
issued under the Plan shall not be subject to the terms of this Section II.
                            ---                                            

          A.   ELIGIBILITY.  Incentive Options may only be granted to Employees.
               -----------                                                      

                                       7
<PAGE>
 
          B.  DOLLAR LIMITATION.  The aggregate Fair Market Value of the shares
              -----------------                                                
of Class A Common Stock (determined as of the respective date or dates of grant)
for which one or more options granted to any Employee under the Plan (or any
other option plan of the Corporation or any Parent or Subsidiary) may for the
first time become exercisable as Incentive Options during any one calendar year
shall not exceed the sum of One Hundred Thousand Dollars ($100,000).  To the
extent the Employee holds two (2) or more such options which become exercisable
for the first time in the same calendar year, the foregoing limitation on the
exercisability of such options as Incentive Options shall be applied on the
basis of the order in which such options are granted.

          C.   10% STOCKHOLDER.  If any Employee to whom an Incentive Option is
               ---------------                                                 
granted is a 10% Stockholder, then the exercise price per share shall not be
less than one hundred ten percent (110%) of the Fair Market Value per share of
Class A Common Stock on the option grant date, and the option term shall not
exceed five (5) years measured from the option grant date.

     III.  CORPORATE TRANSACTION/CHANGE IN CONTROL

           A.   In the event of any Corporate Transaction, each outstanding
option shall automatically accelerate so that each such option shall,
immediately prior to the effective date of the Corporate Transaction, become
fully exercisable with respect to the total number of shares of Class A Common
Stock at the time subject to such option and may be exercised for any or all of
those shares as fully vested shares of Class A Common Stock.  However, an
outstanding option shall not become exercisable on such an accelerated basis if
and to the extent:  (i) such option is, in connection with the Corporate
Transaction, to be assumed by the successor corporation (or parent thereof) or
(ii) such option is to be replaced with a cash incentive program of the
successor corporation which preserves the spread existing at the time of the
Corporate Transaction on any shares for which the option is not otherwise at
that time exercisable and provides for subsequent payout in accordance with the
same exercise/vesting schedule applicable to those option shares or (iii) the
acceleration of such option is subject to other limitations imposed by the Plan
Administrator at the time of the option grant.

           B.   All outstanding repurchase rights shall automatically terminate,
and the shares of Class A Common Stock subject to those terminated rights shall
immediately vest in full, in the event of any Corporate Transaction, except to
the extent: (i) those repurchase rights are to be assigned to the successor
corporation (or parent thereof) in connection with such Corporate Transaction or
(ii) such accelerated vesting is precluded by other limitations imposed by the
Plan Administrator at the time the repurchase right is issued.

           C.   Immediately following the consummation of the Corporate
Transaction, all outstanding options shall terminate and cease to be
outstanding, except to the extent assumed by the successor corporation (or
parent thereof).

                                       8
<PAGE>
 
          D.  Each option which is assumed in connection with a Corporate
Transaction shall be appropriately adjusted, immediately after such Corporate
Transaction, to apply to the number and class of securities which would have
been issuable to the Optionee in consummation of such Corporate Transaction had
the option been exercised immediately prior to such Corporate Transaction.
Appropriate adjustments to reflect such Corporate Transaction shall also be made
to (i) the exercise price payable per share under each outstanding option,
provided the aggregate exercise price payable for such securities shall remain
- --------                                                                      
the same, (ii) the maximum number and/or class of securities available for
issuance over the remaining term of the Plan and (iii) the maximum number and/or
class of securities for which any one person may be granted stock options,
separately exercisable stock appreciation rights and direct stock issuances
under the Plan per calendar year.

          E.   The Plan Administrator shall have the discretionary authority to
provide for the automatic acceleration of one or more outstanding options under
the Discretionary Option Grant Program upon the occurrence of a Corporate
Transaction, whether or not those options are to be assumed in the Corporate
Transaction, so that each such option shall, immediately prior to the effect
date of such Corporate Transaction, become fully exercisable with respect to the
total number of shares of Class A Common Stock at the time subject to that
option and may be exercised for any or all of those shares as fully vested
shares of Class A Common Stock. In addition, the Plan Administrator shall have
the discretionary authority to structure one or more of the Corporation's
repurchase rights under the Discretionary Option Grant Program so that those
rights shall not be assignable in connection with such Corporate Transaction and
shall accordingly terminate upon the consummation of such Corporate Transaction,
and the shares subject to those terminated rights shall thereupon vest in full.

          F.   The Plan Administrator shall have full power and authority,
exercisable either at the time the option is granted or at any time while the
option remains outstanding, to provide for the automatic acceleration of one or
more outstanding options under the Discretionary Option Grant Program in the
event the Optionee's Service is subsequently terminated by reason of an
Involuntary Termination within a designated period (not to exceed eighteen (18)
months) following the effective date of any Corporate Transaction in which those
options are assumed and do not otherwise accelerate.  Any options so accelerated
shall remain exercisable for fully vested shares until the earlier of (i) the
                                                           -------           
expiration of the option term or (ii) the expiration of the one (1) year period
measured from the effective date of the Involuntary Termination.  In addition,
the Plan Administrator may provide that one or more of the Corporation's
outstanding repurchase rights with respect to shares held by the Optionee at the
time of such Involuntary Termination shall immediately terminate, and the shares
subject to those terminated repurchase rights shall accordingly vest in full.

          G.   The Plan Administrator shall have the discretionary authority to
provide for the automatic acceleration of one or more outstanding options under
the Discretionary Option Grant Program upon the occurrence of a Change in
Control so that each such option shall, immediately prior to the effect date of
such Change in Control, become fully exercisable with respect to the total
number of shares of Common Stock at the time subject to that option and may

                                       9
<PAGE>
 
be exercised for any or all of those shares as fully vested shares of Common
Stock.  Each such accelerated option shall remain exercisable until the
expiration or sooner termination of the option term.  In addition, the Plan
Administrator shall have the discretionary authority to structure one or more of
the Corporation's repurchase rights under the Discretionary Option Grant Program
so that those rights shall terminate automatically upon the consummation of such
Change in Control, and the shares subject to those terminated rights shall
thereupon vest in full.  Alternatively, the Plan Administrator may condition the
automatic acceleration of one or more outstanding options under the
Discretionary Option Grant Program and the termination of one or more of the
Corporation's outstanding repurchase rights under such program upon the
subsequent termination of the Optionee's Service by reason of an Involuntary
Termination within a designated period (not to exceed eighteen (18) months)
following the effective date of such Change in Control.  Each option so
accelerated shall remain exercisable for fully vested shares until the earlier
                                                                       -------
of (i) the expiration of the option term or (ii) the expiration of the one (1)
year period measured from the effective date of such Involuntary Termination.

          H.   The portion of any Incentive Option accelerated in connection
with a Corporate Transaction or Change in Control shall remain exercisable as an
Incentive Option only to the extent the applicable One Hundred Thousand Dollar
($100,000) limitation is not exceeded.  To the extent such dollar limitation is
exceeded, the accelerated portion of such option shall be exercisable as a
Nonstatutory Option under the Federal tax laws.

          I.   The outstanding options shall in no way affect the right of the
Corporation to adjust, reclassify, reorganize or otherwise change its capital or
business structure or to merge, consolidate, dissolve, liquidate or sell or
transfer all or any part of its business or assets.

     IV.  CANCELLATION AND REGRANT OF OPTIONS

          The Plan Administrator shall have the authority to effect, at any time
and from time to time, with the consent of the affected option holders, the
cancellation of any or all outstanding options under the Discretionary Option
Grant Program and to grant in substitution new options covering the same or
different number of shares of Class A Common Stock but with an exercise price
per share equal to the Fair Market Value per share of Class A Common Stock on
the new grant date.

     V.   STOCK APPRECIATION RIGHTS

          A.   The Plan Administrator shall have the authority to grant to
selected Optionees tandem stock appreciation rights and/or limited stock
appreciation rights.

                                       10
<PAGE>
 
          B.  The following terms shall govern the grant and exercise of tandem
stock appreciation rights:

               (i)   One or more Optionees may be granted the right, exercisable
     upon such terms as the Plan Administrator may establish, to elect between
     the exercise of the underlying option for shares Class A Common Stock and
     the surrender of that option in exchange for a distribution from the
     Corporation in an amount equal to the excess of (a) the Fair Market Value
     (on the option surrender date) of the number of shares in which the
     Optionee is at the time vested under the surrendered option (or surrendered
     portion) over (b) the aggregate exercise price payable for those shares.

               (ii)  No such option surrender shall be effective unless it is
     approved by the Plan Administrator, either at the time of the actual option
     surrender or at any earlier time.  If the surrender is so approved, then
     the distribution to which the Optionee shall be entitled may be made in
     shares of Class A Common Stock valued at Fair Market Value on the option
     surrender date, in cash, or partly in shares and partly in cash, as the
     Plan Administrator shall in its sole discretion deem appropriate.

               (iii) If the surrender of an option is not approved by the Plan
     Administrator, then the Optionee shall retain whatever rights the Optionee
     had under the surrendered option (or surrendered portion) on the option
     surrender date and may exercise such rights at any time prior to the later
                                                                          -----
     of (a) five (5) business days after the receipt of the rejection notice or
     (b) the last day on which the option is otherwise exercisable in accordance
     with the terms of the documents evidencing such option, but in no event may
     such rights be exercised more than ten (10) years after the option grant
     date.

          C.  The following terms shall govern the grant and exercise of limited
stock appreciation rights:

               (i)  One or more Section 16 Insiders may be granted limited stock
     appreciation rights with respect to their outstanding options.

               (ii) Upon the occurrence of a Hostile Takeover, each individual
     holding one or more options with such a limited stock appreciation right
     shall have the unconditional right (exercisable for a thirty (30) day
     period following such Hostile Takeover) to surrender each such option to
     the Corporation, to the extent the option is at the time exercisable for
     vested shares of Class A Common Stock.  In return for the surrendered
     option, the Optionee shall receive a cash distribution from the Corporation
     in an amount equal to the excess of (A) the Takeover Price of the shares of
     Class A Common Stock which are at the time vested under each surrendered
     option (or surrendered portion) over (B) the aggregate exercise price

                                       11
<PAGE>
 
     payable for those shares.  Such cash distribution shall be paid within five
     (5) days following the option surrender date.

               (iii) The Plan Administrator shall preapprove, at the time the
     limited right is granted, the subsequent exercise of that right in
     accordance with the terms of the grant and the provisions of this Section
     V.  No additional approval of the Plan Administrator or the Board shall be
     required at the time of the actual option surrender and cash distribution.

               (iv)  The balance of the option (if any) shall remain outstanding
     and exercisable in accordance with the documents evidencing such option.

                                       12
<PAGE>
 
                                 ARTICLE THREE

                            STOCK ISSUANCE PROGRAM
                            ----------------------

     I.   STOCK ISSUANCE TERMS

          Shares of Class A Common Stock may be issued under the Stock Issuance
Program through direct and immediate issuances without any intervening option
grants.  Each such stock issuance shall be evidenced by a Stock Issuance
Agreement which complies with the terms specified below.

          A.  PURCHASE PRICE.
              -------------- 

              1.  The purchase price per share shall be fixed by the Plan
Administrator, but shall not be less than one hundred percent (100%) of the Fair
Market Value per share of Class A Common Stock on the issuance date.

              2.  Subject to the provisions of Section I of Article Five, shares
of Class A Common Stock may be issued under the Stock Issuance Program for any
of the following items of consideration which the Plan Administrator may deem
appropriate in each individual instance:

               (i)  cash or check made payable to the Corporation, or

               (ii) past services rendered to the Corporation (or any Parent or
     Subsidiary).

          B.  VESTING PROVISIONS.
              ------------------ 

              1.  Shares of Class A Common Stock issued under the Stock Issuance
Program may, in the discretion of the Plan Administrator, be fully and
immediately vested upon issuance or may vest in one or more installments over
the Participant's period of Service or upon attainment of specified performance
objectives.  The elements of the vesting schedule applicable to any unvested
shares of Class A Common Stock issued under the Stock Issuance Program shall be
determined by the Plan Administrator and incorporated into the Stock Issuance
Agreement.

              2.  Any new, substituted or additional securities or other
property (including money paid other than as a regular cash dividend) which the
Participant may have the right to receive with respect to the Participant's
unvested shares of Class A Common Stock by reason of any stock dividend, stock
split, recapitalization, combination of shares, exchange of shares or other
change affecting the outstanding Class A Common Stock as a class without the
Corporation's receipt of consideration shall be issued subject to (i) the same
vesting requirements applicable to the Participant's unvested shares of Class A
Common Stock and (ii) such escrow arrangements as the Plan Administrator shall
deem appropriate.

                                       13
<PAGE>
 
          3.  The Participant shall have full stockholder rights with respect to
any shares of Class A Common Stock issued to the Participant under the Stock
Issuance Program, whether or not the Participant's interest in those shares is
vested.  Accordingly, the Participant shall have the right to vote such shares
and to receive any regular cash dividends paid on such shares.

          4.  Should the Participant cease to remain in Service while holding
one or more unvested shares of Class A Common Stock issued under the Stock
Issuance Program or should the performance objectives not be attained with
respect to one or more such unvested shares of Class A Common Stock, then those
shares shall be immediately surrendered to the Corporation for cancellation, and
the Participant shall have no further stockholder rights with respect to those
shares.  To the extent the surrendered shares were previously issued to the
Participant for consideration paid in cash or cash equivalent (including the
Participant's purchase money indebtedness), the Corporation shall repay to the
Participant the cash consideration paid for the surrendered shares and shall
cancel the unpaid principal balance of any outstanding purchase money note of
the Participant attributable to the surrendered shares.

          5.  The Plan Administrator may in its discretion waive the surrender
and cancellation of one or more unvested shares of Class A Common Stock which
would otherwise occur upon the cessation of the Participant's Service or the
nonattainment of the performance objectives applicable to those shares.  Such
waiver shall result in the immediate vesting of the Participant's interest in
the shares as to which the waiver applies.  Such waiver may be effected at any
time, whether before or after the Participant's cessation of Service or the
attainment or nonattainment of the applicable performance objectives.

     II.  CORPORATE TRANSACTION/CHANGE IN CONTROL

          A.  All of the Corporation's outstanding repurchase rights under the
Stock Issuance Program shall terminate automatically, and all the shares of
Class A Common Stock subject to those terminated rights shall immediately vest
in full, in the event of any Corporate Transaction, except to the extent (i)
those repurchase rights are to be assigned to the successor corporation (or
parent thereof) in connection with such Corporate Transaction or (ii) such
accelerated vesting is precluded by other limitations imposed in the Stock
Issuance Agreement.

          B.  The Plan Administrator shall have the discretionary authority,
exercisable either at the time the unvested shares are issued under the Stock
Issuance Program or any time while the Corporation's repurchase rights with
respect to those shares remain outstanding, to structure one or more of those
repurchase rights so that such rights shall not be assignable in connection with
a Corporate Transaction and shall accordingly terminate upon the consummation of
such Corporate Transaction, and the shares subject to those terminated
repurchase rights shall thereupon vest in full.

                                       14
<PAGE>
 
          C.  The Plan Administrator shall have the discretionary authority,
exercisable either at the time the unvested shares are issued or any time while
the Corporation's repurchase rights remain outstanding under the Stock Issuance
Program, to provide that those rights shall automatically terminate in whole or
in part, and the shares of Class A Common Stock subject to those terminated
rights shall immediately vest, in the event the Participant's Service should
subsequently terminate by reason of an Involuntary Termination within a
designated period (not to exceed eighteen (18) months) following the effective
date of any Corporate Transaction in which those repurchase rights are assigned
to the successor corporation (or parent thereof).

          D.  The Plan Administrator shall have the discretionary authority,
exercisable either at the time the unvested shares are issued or any time while
the Corporation's repurchase rights with respect to those shares remain
outstanding under the Stock Issuance Program, to structure one or more of those
repurchase rights so that such rights shall automatically terminate in whole or
in part, and the shares of Class A Common Stock subject to those terminated
rights shall immediately vest, upon (i) a Change in Control or (ii) the
subsequent termination of the Participant's Service by reason of an Involuntary
Termination within a designated period (not to exceed eighteen (18) months)
following the effective date of such Change in Control or Involuntary
Termination.

     III. SHARE ESCROW/LEGENDS

          Unvested shares may, in the Plan Administrator's discretion, be held
in escrow by the Corporation until the Participant's interest in such shares
vests or may be issued directly to the Participant with restrictive legends on
the certificates evidencing those unvested shares.

                                       15
<PAGE>
 
                                 ARTICLE FOUR

                        AUTOMATIC OPTION GRANT PROGRAM
                        ------------------------------

     I.   OPTION TERMS

          A.  GRANT DATES.  Option grants shall be made on the dates specified
              -----------                                                     
below:

          1.  Each individual serving as a non-employee Board member on the Plan
Effective Date shall automatically be granted at that time a Nonstatutory Option
to purchase 10,000 shares of Class A Common Stock, provided that individual has
not previously been in the employ of the Corporation or any Parent or
Subsidiary.

          2.  Each individual who is first elected or appointed as a non-
employee Board member on or after the Plan Effective Date shall automatically be
granted, on the date of such initial election or appointment, a Nonstatutory
Option to purchase 10,000 shares of Class A Common Stock, provided that
individual has not previously been in the employ of the Corporation or any
Parent or Subsidiary.

          3.  On the date of each Annual Stockholders Meeting, beginning with
the 1998 Annual Stockholders Meeting, each individual who is to continue to
serve as a non-employee Board member, whether or not that individual is standing
for re-election to the Board at that particular Annual Meeting, shall
automatically be granted a Nonstatutory Option to purchase 5,000 shares of Class
A Common Stock, provided such individual has served as a non-employee Board
member for at least six (6) months.  There shall be no limit on the number of
such 5,000 share option grants any one non-employee Board member may receive
over his or her period of Board service, and non-employee Board members who have
previously been in the employ of the Corporation (or any Parent or Subsidiary)
shall be eligible to receive one or more such annual option grants over their
period of continued Board service.

          Stockholder approval of the Plan on the Plan Effective Date will
constitute preapproval of each option granted pursuant to the express terms of
this Automatic Option Grant Program and the subsequent exercise of that option
in accordance with its terms.

          B.  EXERCISE PRICE.
              -------------- 

          1.  The exercise price per share shall be equal to one hundred percent
(100%) of the Fair Market Value per share of Class A Common Stock on the option
grant date.

          2.  The exercise price shall be payable in one or more of the
alternative forms authorized under the Discretionary Option Grant Program.
Except to the extent the sale and remittance procedure specified thereunder is
utilized, payment of the exercise price for the purchased shares must be made on
the Exercise Date.

                                       16
<PAGE>
 
          C.  OPTION TERM.  Each option shall have a term of ten (10) years
              -----------                                                  
measured from the option grant date.

          D.  EXERCISE AND VESTING OF OPTIONS.  Each option shall be immediately
              -------------------------------                                   
exercisable for any or all of the option shares.  However, any shares purchased
under the option shall be subject to repurchase by the Corporation, at the
exercise price paid per share, upon the Optionee's cessation of Board service
prior to vesting in those shares.  Each initial 10,000 share grant shall vest,
and the Corporation's repurchase right shall lapse, in a series of four (4)
successive equal annual installments upon the Optionee's completion of each year
of Board service over the four (4) year period measured from the option grant
date.  Each annual 5,000 share grant shall vest, and the Corporation's
repurchase right shall lapse, upon the Optionee's completion of one (1) year of
Board service measured from the automatic grant date.

          E.  TERMINATION OF BOARD SERVICE.  The following provisions shall
              ----------------------------                                 
govern the exercise of any options held by the Optionee at the time the Optionee
ceases to serve as a Board member:

               (i)   The Optionee (or, in the event of Optionee's death, the
     personal representative of the Optionee's estate or the person or persons
     to whom the option is transferred pursuant to the Optionee's will or in
     accordance with the laws of descent and distribution) shall have a twelve
     (12) month period following the date of such cessation of Board service in
     which to exercise each such option.

               (ii)  During the twelve (12) month exercise period, the option
     may not be exercised in the aggregate for more than the number of vested
     shares of Class A Common Stock for which the option is exercisable at the
     time of the Optionee's cessation of Board service.

               (iii) Should the Optionee cease to serve as a Board member by
     reason of death or Permanent Disability, then all shares at the time
     subject to the option shall immediately vest so that such option may,
     during the twelve (12) month exercise period following such cessation of
     Board service, be exercised for all or any portion of those shares as fully
     vested shares of Class A Common Stock.

               (iv)  In no event shall the option remain exercisable after the
     expiration of the option term.  Upon the expiration of the twelve (12)
     month exercise period or (if earlier) upon the expiration of the option
     term, the option shall terminate and cease to be outstanding for any vested
     shares for which the option has not been exercised.  However, the option
     shall, immediately upon the Optionee's cessation of Board service for any
     reason other than death or Permanent Disability, terminate and cease to be
     outstanding to the extent the option is not otherwise at that time
     exercisable for vested shares.

                                       17
<PAGE>
 
     II.  CORPORATE TRANSACTION/CHANGE IN CONTROL/HOSTILE TAKE-OVER

          A.  The shares of Class A Common Stock subject to each option
outstanding under this Article Four at the time of a Corporate Transaction but
not otherwise vested shall automatically vest in full so that each such option
shall, immediately prior to the effective date of the Corporate Transaction,
become fully exercisable for all of the shares of Class A Common Stock at the
time subject to such option and may be exercised for all or any portion of those
shares as fully vested shares of Class A Common Stock.  Immediately following
the consummation of the Corporate Transaction, each automatic option grant shall
terminate and cease to be outstanding, except to the extent assumed by the
successor corporation (or parent thereof).

          B.  The shares of Class A Common Stock subject to each option
outstanding under this Article Four at the time of a Change in Control but not
otherwise vested shall automatically vest in full so that each such option
shall, immediately prior to the effective date of the Change in Control, become
fully exercisable for all of the shares of Class A Common Stock at the time
subject to such option and may be exercised for all or any portion of those
shares as fully vested shares of Class A Common Stock. Each such option shall
remain exercisable for such fully vested option shares until the expiration or
sooner termination of the option term or the surrender of the option in
connection with a Hostile Take-Over.

          C.  All outstanding repurchase rights under the Automatic Option Grant
Program shall automatically terminate, and the unvested shares of Class A Common
Stock subject to those terminated rights shall immediately vest in full, in the
event of any Corporate Transaction or Change in Control.

          D.  Upon the occurrence of a Hostile Take-Over, the Optionee shall
have a thirty (30) day period in which to surrender to the Corporation each of
his or her outstanding automatic option grants.  The Optionee shall in return be
entitled to a cash distribution from the Corporation in an amount equal to the
excess of (i) the Take-Over Price of the shares of Class A Common Stock at the
time subject to each surrendered option (whether or not the Optionee is
otherwise at the time vested in those shares) over (ii) the aggregate exercise
price payable for such shares.  Such cash distribution shall be paid within five
(5) days following the surrender of the option to the Corporation. Stockholder
approval of the Plan on the Plan Effective Date shall constitute preapproval of
the grant of each such option surrender right under this Automatic Option Grant
Program and the subsequent exercise of that right in accordance with the terms
and provisions of this Section II.D.  No additional approval or consent of the
Plan Administrator or the Board shall be required at the time of the actual
option surrender and cash distribution.

                                       18
<PAGE>
 
          E.  Each option which is assumed in connection with a Corporate
Transaction shall be appropriately adjusted, immediately after such Corporate
Transaction, to apply to the number and class of securities which would have
been issuable to the Optionee in consummation of such Corporate Transaction had
the option been exercised immediately prior to such Corporate Transaction.
Appropriate adjustments shall also be made to the exercise price payable per
share under each outstanding option, provided the aggregate exercise price
                                     --------                             
payable for such securities shall remain the same.

          F.  The grant of options under the Automatic Option Grant Program
shall in no way affect the right of the Corporation to adjust, reclassify,
reorganize or otherwise change its capital or business structure or to merge,
consolidate, dissolve, liquidate or sell or transfer all or any part of its
business or assets.

     III. REMAINING TERMS

          The remaining terms of each option granted under the Automatic Option
Grant Program shall be the same as the terms in effect for option grants made
under the Discretionary Option Grant Program.

                                       19
<PAGE>
 
                                 ARTICLE FIVE

                                 MISCELLANEOUS
                                 -------------

     I.   FINANCING

          The Plan Administrator may permit any Optionee or Participant to pay
the option exercise price under the Discretionary Option Grant Program or the
purchase price of shares issued under the Stock Issuance Program by delivering a
full-recourse, interest bearing promissory note payable in one or more
installments.  The terms of any such promissory note (including the interest
rate and the terms of repayment) shall be established by the Plan Administrator
in its sole discretion.  In no event may the maximum credit available to the
Optionee or Participant exceed the sum of (i) the aggregate option exercise
price or purchase price payable for the purchased shares (less the par value of
those shares) plus (ii) any Federal, state and local income and employment tax
liability incurred by the Optionee or the Participant in connection with the
option exercise or share purchase.

     II.  TAX WITHHOLDING

          A.  The Corporation's obligation to deliver shares of Class A Common
Stock upon the exercise of options or the issuance or vesting of such shares
under the Plan shall be subject to the satisfaction of all applicable Federal,
state and local income and employment tax withholding requirements.

          B.  The Plan Administrator may, in its discretion, provide any or all
holders of Nonstatutory Options or unvested shares of Class A Common Stock under
the Plan (other than the options granted or the shares issued under the
Automatic Option Grant Program) with the right to use shares of Class A Common
Stock in satisfaction of all or part of the Taxes incurred by such holders in
connection with the exercise of their options or the vesting of their shares.
Such right may be provided to any such holder in either or both of the following
formats:

          Stock Withholding:  The election to have the Corporation withhold,
          -----------------                                                 
from the shares of Class A Common Stock otherwise issuable upon the exercise of
such Nonstatutory Option or the vesting of such shares, a portion of those
shares with an aggregate Fair Market Value equal to the percentage of the Taxes
(not to exceed one hundred percent (100%)) designated by the holder.

          Stock Delivery:  The election to deliver to the Corporation, at the
          --------------                                                     
time the Nonstatutory Option is exercised or the shares vest, one or more shares
of Class A Common Stock previously acquired by such holder (other than in
connection with the option exercise or share vesting triggering the Taxes) with
an aggregate Fair Market Value equal to the percentage of the Taxes (not to
exceed one hundred percent (100%)) designated by the holder.

                                       20
<PAGE>
 
     III. EFFECTIVE DATE AND TERM OF THE PLAN

          A.  The Plan was adopted by the Board on July 25, 1997 and shall
become effective upon approval by the Corporation's stockholders at the 1997
Annual Meeting held on the Plan Effective Date.

          B.  The Plan shall terminate upon the earliest to occur of (i)
                                                --------                
September 4, 2007, (ii) the date on which all shares available for issuance
under the Plan shall have been issued as fully vested shares or (iii) the
termination of all outstanding options in connection with a Corporate
Transaction.  Upon such plan termination, all outstanding option grants and
unvested stock issuances shall thereafter continue to have force and effect in
accordance with the provisions of the documents evidencing those grants or
issuances.

     IV.  AMENDMENT OF THE PLAN

          A.  The Board shall have complete and exclusive power and authority to
amend or modify the Plan in any or all respects.  However, no such amendment or
modification shall adversely affect the rights and obligations with respect to
stock options or unvested stock issuances at the time outstanding under the Plan
unless the Optionee or the Participant consents to such amendment or
modification. In addition, certain amendments may require stockholder approval
pursuant to applicable laws or regulations.

          B.  Options to purchase shares of Class A Common Stock may be granted
under the Discretionary Option Grant Program and shares of Class A Common Stock
may be issued under the Stock Issuance Program that are in each instance in
excess of the number of shares then available for issuance under the Plan,
provided any excess shares actually issued under those programs shall be held in
escrow until there is obtained stockholder approval of an amendment sufficiently
increasing the number of shares of Class A Common Stock available for issuance
under the Plan.  If such stockholder approval is not obtained within twelve (12)
months after the date the first such excess issuances are made, then (i) any
unexercised options granted on the basis of such excess shares shall terminate
and cease to be outstanding and (ii) the Corporation shall promptly refund to
the Optionees and the Participants the exercise or purchase price paid for any
excess shares issued under the Plan and held in escrow, together with interest
(at the applicable Short Term Federal Rate) for the period the shares were held
in escrow, and such shares shall thereupon be automatically cancelled and cease
to be outstanding.

     V.  USE OF PROCEEDS

          Any cash proceeds received by the Corporation from the sale of shares
of Class A Common Stock under the Plan shall be used for general corporate
purposes.

                                       21
<PAGE>
 
     VI.  REGULATORY APPROVALS

          A.  The implementation of the Plan, the granting of any stock option
under the Plan and the issuance of any shares of Class A Common Stock (i) upon
the exercise of any granted option or (ii) under the Stock Issuance Program
shall be subject to the Corporation's procurement of all approvals and permits
required by regulatory authorities having jurisdiction over the Plan, the stock
options granted under it and the shares of Class A Common Stock issued pursuant
to it.

          B.  No shares of Class A Common Stock or other assets shall be issued
or delivered under the Plan unless and until there shall have been compliance
with all applicable requirements of Federal and state securities laws, including
the filing and effectiveness of the Form S-8 registration statement for the
shares of Class A Common Stock issuable under the Plan, and all applicable
listing requirements of any stock exchange (or the Nasdaq National Market, if
applicable) on which Class A Common Stock is then listed for trading.

     VII.  NO EMPLOYMENT/SERVICE RIGHTS

          Nothing in the Plan shall confer upon the Optionee or the Participant
any right to continue in Service for any period of specific duration or
interfere with or otherwise restrict in any way the rights of the Corporation
(or any Parent or Subsidiary employing or retaining such person) or of the
Optionee or the Participant, which rights are hereby expressly reserved by each,
to terminate such person's Service at any time for any reason, with or without
cause.

                                       22
<PAGE>
 
                                   APPENDIX
                                   --------


          The following definitions shall be in effect under the Plan:

     A.  AUTOMATIC OPTION GRANT PROGRAM shall mean the automatic option grant
         ------------------------------                                      
program in effect under the Plan.

     B.  BOARD shall mean the Corporation's Board of Directors.
         -----                                                 

     C.  CHANGE IN CONTROL shall mean a change in ownership or control of the
         -----------------                                                   
Corporation effected through either of the following transactions:

               (i)  the acquisition, directly or indirectly by any person or
     related group of persons (other than the Corporation or a person that
     directly or indirectly controls, is controlled by, or is under common
     control with, the Corporation), of beneficial ownership (within the meaning
     of Rule 13d-3 of the 1934 Act) of securities possessing more than fifty
     percent (50%) of the total combined voting power of the Corporation's
     outstanding securities pursuant to a tender or exchange offer made directly
     to the Corporation's stockholders, or

               (ii) a change in the composition of the Board over a period of
     thirty-six (36) consecutive months or less such that a majority of the
     Board members ceases, by reason of one or more contested elections for
     Board membership, to be comprised of individuals who either (A) have been
     Board members continuously since the beginning of such period or (B) have
     been elected or nominated for election as Board members during such period
     by at least a majority of the Board members described in clause (A) who
     were still in office at the time the Board approved such election or
     nomination.

     D.  CLASS A COMMON STOCK shall mean the Corporation's Class A Common Stock,
         --------------------                                                   
which shall be registered under Section 12(g) of the 1934 Act and shall be
entitled to one (1) vote per share on all matters subject to stockholder
approval.

     E.  CODE shall mean the Internal Revenue Code of 1986, as amended.
         ----                                                          

     F.  CORPORATE TRANSACTION shall mean either of the following stockholder-
         ---------------------                                               
approved transactions to which the Corporation is a party:

               (i) a merger or consolidation in which securities possessing more
     than fifty percent (50%) of the total combined voting power of the
     Corporation's outstanding securities are transferred to a person or persons
     different from the persons holding those securities immediately prior to
     such transaction, or

                                      A-1
<PAGE>
 
          (ii) the sale, transfer or other disposition of all or substantially
     all of the Corporation's assets  in complete liquidation or dissolution of
     the Corporation.

     G.  CORPORATION shall mean ATL Products, Inc., a Delaware corporation, and
         -----------                                                           
its successors.

     H.  DISCRETIONARY OPTION GRANT PROGRAM shall mean the discretionary option
         ----------------------------------                                    
grant program in effect under the Plan.

     I.  ELIGIBLE DIRECTOR shall mean a non-employee Board member eligible to
         -----------------                                                   
participate in the Automatic Option Grant Program in accordance with the
eligibility provisions of Article One.

     J.  EMPLOYEE shall mean an individual who is in the employ of the
         --------                                                     
Corporation (or any Parent or Subsidiary), subject to the control and direction
of the employer entity as to both the work to be performed and the manner and
method of performance.

     K.  EXERCISE DATE shall mean the date on which the Corporation shall have
         -------------                                                        
received written notice of the option exercise.

     L.  FAIR MARKET VALUE per share of Class A Common Stock on any relevant
         -----------------                                                  
date shall be determined in accordance with the following provisions:

               (i)  If the Class A Common Stock is at the time traded on the
     Nasdaq National Market, then the Fair Market Value shall be deemed equal to
     the closing selling price per share of Class A Common Stock on the date in
     question, as such price is reported on the Nasdaq National Market or any
     successor system.  If there is no closing selling price for the Class A
     Common Stock on the date in question, then the Fair Market Value shall be
     the closing selling price on the last preceding date for which such
     quotation exists.

               (ii) If the Class A Common Stock is at the time listed on any
     Stock Exchange, then the Fair Market Value shall be deemed equal to the
     closing selling price per share of Class A Common Stock on the date in
     question on the Stock Exchange determined by the Plan Administrator to be
     the primary market for the Class A Common Stock, as such price is
     officially quoted in the composite tape of transactions on such exchange.
     If there is no closing selling price for the Class A Common Stock on the
     date in question, then the Fair Market Value shall be the closing selling
     price on the last preceding date for which such quotation exists.


                                      A-2
<PAGE>
 
     M.  HOSTILE TAKE-OVER shall mean the acquisition, directly or indirectly,
         -----------------                                                    
by any person or related group of persons (other than the Corporation or a
person that directly or indirectly controls, is controlled by, or is under
common control with, the Corporation) of beneficial ownership (within the
meaning of Rule 13d-3 of the 1934 Act) of securities possessing more than fifty
percent (50%) of the total combined voting power of the Corporation's
outstanding securities  pursuant to a tender or exchange offer made directly to
the Corporation's stockholders which the Board does not recommend such
stockholders to accept.

     N.  INCENTIVE OPTION shall mean an option which satisfies the requirements
         ----------------                                                      
of Code Section 422.

     O.  INVOLUNTARY TERMINATION shall mean the termination of the Service of
         -----------------------                                             
any individual which occurs by reason of:

               (i)  such individual's involuntary dismissal or discharge by the
     Corporation for reasons other than Misconduct, or

               (ii) such individual's voluntary resignation following (A) a
     change in his or her position with the Corporation which materially reduces
     his or her duties and responsibilities or the level of management to which
     he or she reports, (B) a reduction in his or her level of compensation
     (including base salary, fringe benefits and target bonus under any
     corporate performance based bonus or incentive programs) by more than
     fifteen percent (15%) or (C) a relocation of such individual's place of
     employment by more than fifty (50) miles, provided and only if such change,
     reduction or relocation is effected by the Corporation without the
     individual's consent.
 
     P.  MISCONDUCT shall mean the commission of any act of fraud, embezzlement
         ----------                                                            
or dishonesty by the Optionee or Participant, any unauthorized use or disclosure
by such person of confidential information or trade secrets of the Corporation
(or any Parent or Subsidiary), or any other intentional misconduct by such
person adversely affecting the business or affairs of the Corporation (or any
Parent or Subsidiary) in a material manner.  The foregoing definition shall not
be deemed to be inclusive of all the acts or omissions which the Corporation (or
any Parent or Subsidiary) may consider as grounds for the dismissal or discharge
of any Optionee, Participant or other person in the Service of the Corporation
(or any Parent or Subsidiary).

     Q.  1934 ACT shall mean the Securities Exchange Act of 1934, as amended.
         --------                                                            

     R.  NONSTATUTORY OPTION shall mean an option not intended to satisfy  the
         -------------------                                                  
requirements of Code Section 422.

     S.  OPTIONEE shall mean any person to whom an option is granted under the
         --------                                                             
Discretionary Option Grant or Automatic Option Grant Program.


                                      A-3
<PAGE>
 
     T.  PARENT shall mean any corporation (other than the Corporation) in an
         ------                                                              
unbroken chain of corporations ending with the Corporation, provided each
corporation in the unbroken chain (other than the Corporation) owns, at the time
of the determination, stock possessing fifty percent (50%) or more of the total
combined voting power of all classes of stock in one of the other corporations
in such chain.

     U.  PARTICIPANT shall mean any person who is issued shares of Class A
         -----------                                                      
Common Stock under the Stock Issuance Program.

     V.  PERMANENT DISABILITY OR PERMANENTLY DISABLED shall mean the inability
         --------------------------------------------                         
of the Optionee or the Participant to engage in any substantial gainful activity
by reason of any medically determinable physical or mental impairment expected
to result in death or to be of continuous duration of twelve (12) months or
more.  However, solely for purposes of the Automatic Option Grant Program,
Permanent Disability or Permanently Disabled shall mean the inability of the
non-employee Board member to perform his or her usual duties as a Board member
by reason of any medically determinable physical or mental impairment expected
to result in death or to be of continuous duration of twelve (12) months or
more.

     W.  PLAN shall mean the Corporation's 1997 Stock Incentive Plan, as set
         ----                                                               
forth in this document.

     X.  PLAN ADMINISTRATOR shall mean the particular entity, whether the
         ------------------                                              
Primary Committee, the Board or the Secondary Committee, which is authorized to
administer the Discretionary Option Grant and Stock Issuance Programs with
respect to one or more classes of eligible persons, to the extent such entity is
carrying out its administrative functions under those programs with respect to
the persons under its jurisdiction.

     Y.  PLAN EFFECTIVE DATE shall mean September 4, 1997, the date of the 1997
         -------------------                                                   
Annual Stockholders Meeting at which the Plan is approved by the Corporation's
stockholders.

     Z.  PRIMARY COMMITTEE shall mean the committee of two (2) or more non-
         -----------------                                                
employee Board members appointed by the Board to administer the Discretionary
Option Grant and Stock Issuance Programs with respect to Section 16 Insiders.

     AA.  SECONDARY COMMITTEE shall mean a committee of one (1) or more Board
          -------------------                                                
members appointed by the Board to administer the Discretionary Option Grant and
Stock Issuance Programs with respect to eligible persons other than Section 16
Insiders.

     AB.  SECTION 16 INSIDER shall mean an officer or director of the
          ------------------                                         
Corporation subject to the short swing profit liabilities of Section 16 of the
1934 Act.

                                      A-4
<PAGE>
 
     AC.  SERVICE shall mean the performance of services for the Corporation (or
          -------                                                               
any Parent or Subsidiary) by a person in the capacity of an Employee, a non-
employee member of the board of directors or a consultant or independent
advisor, except to the extent otherwise specifically provided in the documents
evidencing the option grant or stock issuance.

     AD.  STOCK EXCHANGE shall mean either the American Stock Exchange or the
          --------------                                                     
New York Stock Exchange.

     AE.  STOCK ISSUANCE AGREEMENT shall mean the agreement entered into by the
          ------------------------                                             
Corporation and the Participant at the time of issuance of shares of Class A
Common Stock under the Stock Issuance Program.

     AF.  STOCK ISSUANCE PROGRAM shall mean the stock issuance program in effect
          ----------------------                                                
under the Plan.

     AG.  SUBSIDIARY shall mean any corporation (other than the Corporation) in
          ----------                                                           
an unbroken chain of corporations beginning with the Corporation, provided each
corporation (other than the last corporation) in the unbroken chain owns, at the
time of the determination, stock possessing fifty percent (50%) or more of the
total combined voting power of all classes of stock in one of the other
corporations in such chain.

     AH.  TAKE-OVER PRICE shall mean the greater of (i) the Fair Market Value
          ---------------                -------                             
per share of Class A Common Stock on the date the option is surrendered to the
Corporation in connection with a Hostile Take-Over or (ii) the highest reported
price per share of Class A Common Stock paid by the tender offeror in effecting
such Hostile Take-Over.  However, if the surrendered option is an Incentive
Option, the Take-Over Price shall not exceed the clause (i) price per share.

     AI.  TAXES shall mean the Federal, state and local income and employment
          -----                                                              
tax liabilities incurred by the holder of Nonstatutory Options or unvested
shares of Class A Common Stock in connection with the exercise of those options
or the vesting of those shares.

     AJ.  10% STOCKHOLDER shall mean the owner of stock (as determined under
          ---------------                                                   
Code Section 424(d)) possessing more than ten percent (10%) of the total
combined voting power of all classes of stock of the Corporation (or any Parent
or Subsidiary).

                                      A-5

<PAGE>
 
                                                                     EXHIBIT 5.1
                                                                     -----------

                              September 30, 1998



Quantum Corporation
500 McCarthy Boulevard
Milpitas, CA  95035

     Re:  REGISTRATION STATEMENT ON FORM S-8

Ladies and Gentlemen:

     We have examined the Registration Statement on Form S-8 to be filed by you
with the Securities and Exchange Commission on or about September 30, 1998 (the
"Registration Statement"), in connection with the registration under the
Securities Act of 1933, as amended, of 1,826,055 shares of your Common Stock,
par value $.01 per share (the "Shares"), reserved for issuance pursuant to the
ATL Products, Inc. 1996 Stock Incentive Plan and the ATL Products, Inc. 1997
Stock Incentive Plan (the "Plans").  As your counsel in connection with the
transaction, we have examined the proceedings taken and are familiar with the
proceedings proposed to be taken by you in connection with the sale and issuance
of the Shares pursuant to the Plans.

     It is our opinion, when issued and sold in the manner referred to in the
Plans, the Shares will be legally and validly issued, fully paid and
nonassessable.

     We consent to the use of this opinion as an exhibit to the Registration
Statement and further consent to the use of our name wherever appearing in the
Registration Statement and any amendment thereto.

                                    Very truly yours,

                                    WILSON SONSINI GOODRICH & ROSATI
                                    Professional Corporation



                                    /s/ Wilson Sonsini Goodrich & Rosati

<PAGE>
 
                                                                    EXHIBIT 23.1
                                                                    ------------

               CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS



     We consent to the incorporation by reference in the Registration Statement
(Form S-8) pertaining to the ATL Products, Inc. 1996 Stock Incentive Plan and
the ATL Products, Inc. 1997 Stock Incentive Plan of our report dated April 21,
1998, with respect to the consolidated financial statements and schedule of
Quantum Corporation included in its Annual Report (Form 10-K) for the year ended
March 31, 1998, filed with the Securities and Exchange Commission.


                                    /s/  ERNST & YOUNG LLP
San Jose, California
September 29, 1998

<PAGE>
 
                                                                    EXHIBIT 24.2


                       INDEPENDENT ACCOUNTANTS' CONSENT

The Board of Directors
MKE Quantum Components LLC:


We consent to incorporation by reference in the registration statement on Form 
S-8 of Quantum Corporation of our report dated April 14, 1998, except for notes 
6(b) and 12, which are as of June 5, 1998, relating to the consolidated balance 
sheet of MKE Quantum Components LLC as of March 31, 1998, and the related 
consolidated statements of operations, members' equity, and cash flows for the 
period from May 16, 1997 (Inception) to March 31, 1998, which report appears in 
the March 31, 1998, annual report on Form 10-K of Quantum Corporation.


                                            /s/ KPMG Peat Marwick LLP

Boston, Massachusetts
September 29, 1998


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