ZITEL CORP
DEF 14A, 1997-12-24
PATENT OWNERS & LESSORS
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<PAGE>
                            SCHEDULE 14A INFORMATION
 
                  Proxy Statement Pursuant to Section 14(a) of
            the Securities Exchange Act of 1934 (Amendment No.    )
 
    Filed by the Registrant /X/
    Filed by a Party other than the Registrant / /
 
    Check the appropriate box:
    / /  Preliminary Proxy Statement
    / /  Confidential, for Use of the Commission Only (as permitted by Rule
         14a-6(e)(2))
    /X/  Definitive Proxy Statement
    / /  Definitive Additional Materials
    / /  Soliciting Material Pursuant to Section240.14a-11(c) or
         Section240.14a-12
 
                               ZITEL CORPORATION
- --------------------------------------------------------------------------------
                (Name of Registrant as Specified In Its Charter)
 
- --------------------------------------------------------------------------------
    (Name of Person(s) Filing Proxy Statement, if other than the Registrant)
 
Payment of Filing Fee (Check the appropriate box):
 
/X/  No fee required.
/ /  Fee computed on table below per Exchange Act Rules 14a-6(i)(1)
     and 0-11.
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     (2) Aggregate number of securities to which transaction applies:
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         filing fee is calculated and state how it was determined):
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/ /  Fee paid previously with preliminary materials.
/ /  Check box if any part of the fee is offset as provided by Exchange Act Rule
     0-11(a)(2) and identify the filing for which the offsetting fee was paid
     previously. Identify the previous filing by registration statement number,
     or the Form or Schedule and the date of its filing.
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<PAGE>
                               ZITEL CORPORATION
                             47211 BAYSIDE PARKWAY
                               FREMONT, CA 94538
 
                            ------------------------
 
                    NOTICE OF ANNUAL MEETING OF SHAREHOLDERS
                         TO BE HELD ON JANUARY 29, 1998
 
                            ------------------------
 
To the Shareholders of
 
ZITEL CORPORATION:
 
    NOTICE IS HEREBY GIVEN that the Annual Meeting of Shareholders of Zitel
Corporation, a California corporation (the "Company"), will be held on Thursday,
January 29, 1998 at 3:00 p.m. local time at the Milpitas Holiday Inn, 777 Bellew
Drive, Milpitas, California 95035 for the following purposes:
 
    1.  To elect directors to serve for the ensuing year and until their
       successors are elected.
 
    2.  To approve the amendment of the 1990 Stock Option Plan to increase the
       number of shares that may be issued by 750,000 shares.
 
    3.  To transact such other business as may properly come before the meeting
       or any adjournment or postponement thereof.
 
    The foregoing items of business are more fully described in the Proxy
Statement accompanying this Notice.
 
    The Board of Directors has fixed the close of business on November 28, 1997
as the record date for the determination of shareholders entitled to notice of
and to vote at this Annual Meeting and at any adjournment or postponement
thereof.
 
                                          By Order of the Board of Directors
 
                                          Larry B. Schlenoff
                                          SECRETARY
 
FREMONT, CALIFORNIA
DECEMBER 29, 1997
 
    ALL SHAREHOLDERS ARE CORDIALLY INVITED TO ATTEND THE MEETING IN PERSON.
WHETHER OR NOT YOU EXPECT TO ATTEND THE MEETING, PLEASE COMPLETE, DATE, SIGN AND
RETURN THE ENCLOSED PROXY AS PROMPTLY AS POSSIBLE IN ORDER TO ENSURE YOUR
REPRESENTATION AT THE MEETING. A RETURN ENVELOPE (WHICH IS POSTAGE PREPAID IF
MAILED IN THE UNITED STATES) IS ENCLOSED FOR THAT PURPOSE. EVEN IF YOU HAVE
GIVEN YOUR PROXY, YOU MAY STILL VOTE IN PERSON IF YOU ATTEND THE MEETING. PLEASE
NOTE, HOWEVER, THAT IF YOUR SHARES ARE HELD OF RECORD BY A BROKER, BANK OR OTHER
NOMINEE AND YOU WISH TO VOTE AT THE MEETING, YOU MUST OBTAIN FROM THE RECORD
HOLDER A PROXY ISSUED IN YOUR NAME.
<PAGE>
                               ZITEL CORPORATION
                             47211 BAYSIDE PARKWAY
                               FREMONT, CA 94538
                                PROXY STATEMENT
                 INFORMATION CONCERNING SOLICITATION AND VOTING
 
GENERAL
 
    The enclosed proxy is solicited on behalf of the Board of Directors of Zitel
Corporation, a California corporation (the "Company"), for use at the Annual
Meeting of Shareholders to be held on January 29, 1998 at 3:00 p.m. local time
(the "Annual Meeting"), or at any adjournment or postponement thereof, for the
purposes set forth herein and in the accompanying Notice of Annual Meeting. The
Annual Meeting will be held at the Milpitas Holiday Inn, 777 Bellew Drive,
Milpitas, California 95035.
 
SOLICITATION
 
    The Company will bear the entire cost of solicitation of proxies including
preparation, assembly, printing and mailing of this proxy statement, the proxy
and any additional information furnished to shareholders. Copies of solicitation
materials will be furnished to banks, brokerage houses, fiduciaries and
custodians holding in their names shares of the Company's common stock (the
"Common Stock") beneficially owned by others to forward to such beneficial
owners. The Company may reimburse persons representing beneficial owners of
Common Stock for their costs of forwarding solicitation materials to such
beneficial owners. Original solicitation of proxies by mail may be supplemented
by telephone, telegram or personal solicitation by directors, officers or other
regular employees of the Company. No additional compensation will be paid to
directors, officers or other regular employees for such services.
 
    The Company intends to mail this proxy statement and accompanying proxy card
on or about December 29, 1997 to all shareholders entitled to vote at the Annual
Meeting.
 
VOTING RIGHTS AND OUTSTANDING SHARES
 
    Only holders of record of Common Stock at the close of business on November
28, 1997 will be entitled to notice of and to vote at the Annual Meeting. At the
close of business on November 28, 1997, the Company had outstanding and entitled
to vote 15,749,251 shares of Common Stock.
 
    Each holder of record of Common Stock on such date will be entitled to one
vote for each share held on all matters to be voted upon. With respect to the
election of directors, shareholders may exercise cumulative voting rights. Under
cumulative voting, each holder of Common Stock will be entitled to five votes
for each share held. Each shareholder may give one candidate, who has been
nominated prior to voting, all the votes such shareholder is entitled to cast or
may distribute such votes among as many such candidates as such shareholder
chooses. However, no shareholder will be entitled to cumulate votes unless the
candidate's name has been placed in nomination prior to the voting and at least
one shareholder has given notice at the meeting, prior to the voting, of his or
her intention to cumulate votes. Unless the proxyholders are otherwise
instructed, shareholders, by means of the accompanying proxy, will grant the
proxyholders discretionary authority to cumulate votes.
 
    All votes will be tabulated by the inspector of election appointed for the
meeting, who will separately tabulate affirmative and negative votes,
abstentions and broker non-votes. Abstentions and broker non-votes are counted
towards a quorum but are not counted for any purpose in determining whether a
matter is approved.
 
REVOCABILITY OF PROXIES
 
    Any person giving a proxy pursuant to this solicitation has the power to
revoke it at any time before it is voted. It may be revoked by filing with the
Secretary of the Company at the Company's principal executive office, 47211
Bayside Parkway, Fremont, California 94538, a written notice of revocation or a
<PAGE>
duly executed proxy bearing a later date or it may be revoked by attending the
meeting and voting in person. Attendance at the meeting will not, by itself,
revoke a proxy.
 
SHAREHOLDER PROPOSALS
 
    Proposals of shareholders that are intended to be presented at the Company's
1999 Annual Meeting of Shareholders must be received by the Company no later
than August 31, 1998 in order to be included in the proxy statement and proxy
relating to that Annual Meeting.
 
                                   PROPOSAL 1
                             ELECTION OF DIRECTORS
 
    There are five nominees for the five Board positions presently authorized in
the Company's Bylaws. Each director to be elected will hold office until the
next annual meeting of shareholders and until his or her successor is elected
and has qualified or until such director's earlier death, resignation or
removal. Each nominee listed below is currently a director of the Company. Each
nominee listed below was previously elected by the shareholders.
 
    Shares represented by executed proxies will be voted, if authority to do so
is not withheld, for the election of the five nominees named below, subject to
the discretionary power to cumulate votes. In the event that any nominee should
be unavailable for election as a result of an unexpected occurrence, such shares
will be voted for the election of such substitute nominee as management may
propose and the Board may approve. Each person nominated for election has agreed
to serve if elected and management has no reason to believe that any nominee
will be unable to serve.
 
    The five candidates receiving the highest number of affirmative votes cast
at the meeting will be elected directors of the Company.
 
                       THE BOARD OF DIRECTORS RECOMMENDS
                     A VOTE IN FAVOR OF EACH NAMED NOMINEE
 
NOMINEES
 
    The names of the nominees and certain information about them are set forth
below:
 
<TABLE>
<CAPTION>
                                                                                        PRINCIPAL OCCUPATION/
NAME                                                                 AGE            POSITION HELD WITH THE COMPANY
- ---------------------------------------------------------------      ---      ------------------------------------------
<S>                                                              <C>          <C>
William R. Lonergan............................................          72   Chairman of the Board of Directors
Jack H. King...................................................          64   President and Chief Executive Officer
Catherine P. Lego..............................................          41   Venture Capitalist
William M. Regitz..............................................          58   Manager, Intel Corporation
Robert H. Welch................................................          57   President, Telegra Corporation
</TABLE>
 
    William R. Lonergan has served as Chairman of the Board of Directors since
July 1994 and as a Director of the Company since July 1983. Mr. Lonergan was a
Partner of Oxford Partners, the general partner of several venture capital
partnerships, from May 1983 to December 1994. Since January 1995, he has been a
consultant to Oxford Partners. Mr. Lonergan is a Director of Dataware
Technologies, Inc., a developer and marketer of high-performance, multi-platform
and multi-lingual software.
 
    Jack H. King was appointed President and Chief Executive Officer of Zitel in
October 1986. He was elected as a Director in January 1987. Prior to joining
Zitel, Mr. King served as President and Chief Executive Officer of Dynamic Disk,
Inc., a manufacturer of thin film media, from 1984 to 1986. From 1981 to 1984,
he served as President and Chief Operating Officer of Data Electronics, Inc., a
cartridge tape drive manufacturer.
 
                                       2
<PAGE>
    Catherine P. Lego was elected a Director of the Company in July 1994. Ms.
Lego has been a Principal of Lego Ventures and a venture capital consultant
since June 1992. From 1985 to 1992, she was a general partner of Oak Investment
Partners. Ms. Lego is also a Director of Uniphase Corporation, an
optoelectronics company, SanDisk Corp., a manufacturer of flash memory cards,
and two privately-held companies.
 
    William M. Regitz has served as a Director of the Company since March 1983.
He is Manager of Mobile Manufacturing in Hillsboro, Oregon for Intel Corporation
("Intel"). He has served in various positions at Intel since 1971.
 
    Robert H. Welch is a founder of Zitel and served as its President and Chief
Executive Officer and Director from its inception in 1979 until October 1986.
Mr. Welch was Chairman of the Board of Zitel from October 1986 to November 1987
and has remained a Director since that date. Mr. Welch is a private investor and
an officer of Telegra Corporation, a privately-held company. Previously, he was
a management consultant through his firm, Bay Venture Management, for several
privately-held firms.
 
    Mr. Lonergan was originally elected to the Board pursuant to agreements
between Zitel, the Oxford Funds and certain Zitel shareholders to elect a
designee of the Oxford Funds reasonably acceptable to Zitel. These agreements
terminated in January 1984. Mr. Regitz was originally elected to the Board
pursuant to an agreement between Zitel and Intel in connection with the February
1983 product acquisition transaction between the two companies. This agreement
expired in February 1987.
 
BOARD COMMITTEES AND MEETINGS
 
    During the fiscal year ended September 30, 1997, the Board of Directors held
eleven meetings. The Board has an Audit Committee and a Compensation Committee.
 
    The Audit Committee meets with the Company's independent auditors at least
annually to review the results of the annual audit and discuss the financial
statements; recommends to the Board the independent auditors to be retained; and
receives and considers the accountants' comments as to controls, adequacy of
staff and management performance and procedures in connection with audit and
financial controls. The Audit Committee is composed of three non-employee
directors: Ms. Lego and Messrs. Lonergan and Welch. It met two times during such
fiscal year.
 
    The Compensation Committee makes recommendations concerning salaries and
incentive compensation, awards stock options to employees and sales
representatives under the Company's stock option plans and otherwise determines
compensation levels and performs such other functions regarding compensation as
the Board may delegate. The Compensation Committee is composed of three
non-employee directors: Messrs. Lonergan, Regitz and Welch. It met five times
during such fiscal year.
 
    During the fiscal year ended September 30, 1997, each Board member attended
75% or more of the aggregate number of meetings of the Board and of the
committees on which they served that were held during the period for which they
were a director or committee member, respectively.
 
                                   PROPOSAL 2
              APPROVAL OF AMENDMENT OF THE 1990 STOCK OPTION PLAN
 
    In October 1997, the Company's Board of Directors adopted an amendment,
subject to shareholder approval, to increase the number of shares reserved for
issuance under the 1990 Stock Option Plan (the "1990 Option Plan") by 750,000
shares. The Board adopted this amendment to ensure that the Company can continue
to grant stock options to employees at levels determined appropriate by the
Board and the Compensation Committee and to provide incentives for such persons
to exert maximum efforts for the success of the Company.
 
                                       3
<PAGE>
    At November 28, 1997, options (net of canceled or expired options) covering
an aggregate of 1,876,054 shares of the Company's Common Stock were outstanding
under the 1990 Option Plan. 48,067 shares (plus any shares that might in the
future be returned to the plans as a result of cancellations or expiration of
options) remained available for future grant under the 1990 Option Plan. During
the last fiscal year, under the 1990 Option Plan, the Company granted 464,302
options at exercise prices of $17.44 to $43.25 per share to current executive
officers and granted options to purchase 543,954 shares at exercise prices of
$13.63 to $44.38 per share to all employees (excluding executive officers) as a
group.
 
    Shareholders are requested in this Proposal 2 to approve the 1990 Option
Plan, as amended. The affirmative vote of the holders of a majority of the
outstanding shares of Common Stock present in person or represented by proxy and
voting at the Annual Meeting will be required to approve the adoption of the
amendment to the 1990 Option Plan. For purposes of the vote, abstentions and
broker non-votes will not be counted for any purpose in determining whether this
matter has been approved.
 
               THE BOARD RECOMMENDS A VOTE IN FAVOR OF PROPOSAL 2
 
    The essential features of the 1990 Option Plan are outlined below:
 
GENERAL
 
    In September 1990, the Company's Board of Directors adopted the 1990 Option
Plan, effective on October 1, 1990. The 1990 Option Plan was approved by the
shareholders in January 1991. At the same time, the Board of Directors
terminated the Company's 1982 Incentive Stock Option Plan and 1984 Supplemental
Stock Option Plan (together, these two option plans are sometimes referred to as
the "Former Option Plans" and, together with the 1990 Option Plan as the "Option
Plans"), effective upon shareholder approval of the 1990 Stock Option Plan. A
total of 3,650,000 shares (including shares reserved or granted under the Former
Option Plans) were reserved for issuance under the 1990 Option Plan, which was
exactly equal to the number of ungranted shares reserved for issuance under the
Former Option Plans. Shares reserved for issuance under the Former Option Plans,
if the options under which they were to be issued are canceled or terminate,
will become available for issuance under the 1990 Option Plan. In October 1991,
the Company's Board of Directors adopted an amendment to increase the number of
shares reserved under the 1990 Option Plan from 3,650,000 shares to 4,150,000
shares. This amendment was approved by the shareholders in January 1992. In
September 1994, the Company's Board of Directors adopted an amendment to
increase the number of shares reserved under the 1990 Option Plan from 4,150,000
to 4,650,000. This amendment was approved by the shareholders in January 1995.
In November 1996, the Company's Board of Directors adopted an amendment to
increase the number of shares reserved under the 1990 Option Plan from 4,650,000
to 5,450,000. This amendment was approved by the shareholders in February 1997.
In October 1997, the Company's Board of Directors adopted an amendment, subject
to shareholder approval of this Proposal 2, to increase the number of shares
reserved under the 1990 Option Plan from 5,450,000 to 6,200,000.
 
    The 1990 Option Plan provides for the grant of both incentive and
supplemental stock options. Incentive stock options granted under the 1990
Option Plan are intended to qualify as "incentive stock options" within the
meaning of Section 422 of the Internal Revenue Code of 1986, as amended (the
"Code"). Supplemental stock options granted under the 1990 Option Plan are
intended not to qualify as incentive stock options under the Code. See "Federal
Income Tax Information" for a discussion of the tax treatment of incentive and
supplemental stock options.
 
PURPOSE
 
    The 1990 Option Plan was adopted to provide a means by which selected
officers, directors and employees of and consultants to the Company and its
affiliates could be given an opportunity to purchase stock in the Company, to
assist in retaining the services of employees holding key positions, to secure
and
 
                                       4
<PAGE>
retain the services of persons capable of filling such positions, and to provide
incentives for such persons to exert maximum efforts for the success of the
Company.
 
ADMINISTRATION
 
    The 1990 Option Plan is administered by the Board of Directors of the
Company. The Board has the power to construe and interpret the 1990 Option Plan
and, subject to the provisions of the 1990 Option Plan, to determine the persons
to whom and the dates on which options will be granted, the number of shares to
be subject to each option, the time or times during the term of each option
within which all or a portion of such option may be exercised, the exercise
price, the type of consideration, and other terms of the option. The Board of
Directors is authorized to delegate administration of the 1990 Option Plan to a
committee composed of not fewer than two members of the Board. The Board has
delegated administration of the 1990 Option Plan to the Compensation Committee
of the Board. As used herein with respect to the 1990 Option Plan, the "Board"
refers to the Compensation Committee as well as to the Board of Directors
itself.
 
ELIGIBILITY
 
    Under the 1990 Option Plan, incentive stock options may be granted only to
key employees of the Company and its subsidiaries. A director of the Company
shall not be eligible to receive incentive stock options unless such director is
also an employee (including an officer) of the Company or its subsidiaries.
Supplemental stock options under the 1990 Option Plan may only be granted to
directors of, key employees (including officers) of, sales representatives for,
or consultants to the Company and its subsidiaries. A director of the Company
shall not be eligible to receive a supplemental stock option unless such
director is expressly declared eligible to participate in the 1990 Option Plan
by appropriate action of the Board.
 
    No incentive stock option may be granted under the 1990 Option Plan to any
person who, at the time of the grant, owns (or is deemed to own) stock
possessing more than 10% of the total combined voting power of the Company or
any affiliate of the Company, unless the option exercise price is at least 110%
of the fair market value of the stock subject to the option on the date of
grant, and the term of the option does not exceed five years from the date of
grant. For incentive stock options granted under the 1990 Option Plan after
1986, the aggregate fair market value, determined at the time of grant, of the
shares of Common Stock with respect to which such options are exercisable for
the first time by an optionee during any calendar year (under all such plans of
the Company and its affiliates) may not exceed $100,000.
 
STOCK SUBJECT TO THE 1990 OPTION PLAN
 
    If options granted under the 1990 Option Plan expire or otherwise terminate
without being exercised, the Common Stock not purchased pursuant to such options
again becomes available for issuance under the 1990 Option Plan.
 
TERMS OF OPTIONS
 
    The following is a description of the permissible terms of options under the
1990 Option Plan. Individual option grants may be more restrictive as to any or
all of the permissible terms described below.
 
    EXERCISE PRICE; PAYMENT.  The exercise price of incentive stock options
under the 1990 Option Plan may not be less than the fair market value of the
Common Stock subject to the option on the date of the option grant and, in some
cases (see "Eligibility", above), may not be less than 110% of such fair market
value. The exercise price of supplemental options under the 1990 Option Plan may
not be less than 85% of the fair market value of the Common Stock subject to the
option on the date of the option grant. However, if options were granted with
exercise prices below market value, deductions for compensation attributable to
the exercise of such options could be limited by Section 162(m). See "Federal
Income Tax Information."
 
                                       5
<PAGE>
At December 19, 1997, the closing price of the Company's Common Stock as
reported on the Nasdaq National Market System was $11.25 per share.
 
    The exercise price of options granted under the 1990 Option Plan must be
paid either: (a) in cash at the time the option is exercised; or (b) at the
discretion of the Board, (i) by delivery of other Common Stock of the Company,
(ii) pursuant to a deferred payment arrangement; or (c) in any other form of
legal consideration acceptable to the Board.
 
    OPTION EXERCISE.  Options granted under the 1990 Option Plan may become
exercisable in cumulative increments ("vest") as determined by the Board. The
Board has the power to accelerate the time during which an option may be
exercised. In addition, options granted under the 1990 Option Plan may permit
exercise prior to vesting, but in such event the optionee may be required to
enter into an early exercise stock purchase agreement that allows the Company to
repurchase shares not yet vested, at their exercise price, should the optionee
leave the employ of the Company before vesting. To the extent provided by the
terms of an option, an optionee may satisfy any federal, state or local tax
withholding obligation relating to the exercise of such option by a cash payment
upon exercise, by authorizing the Company to withhold a portion of the stock
otherwise issuable to the optionee, by delivering already-owned stock of the
Company, or by a combination of these means.
 
    TERM.  The maximum term of options under the 1990 Option Plan is 10 years,
except that in certain cases (see "Eligibility"), the maximum term is 5 years.
Options under the 1990 Option Plan terminate three months after termination of
the optionee's employment or relationship as a consultant, sales representative
or director of the Company or any affiliate of the Company, unless (a) such
termination is due to such person's permanent and total disability (as defined
in the Code), in which case the option may, but need not, provide that it may be
exercised at any time within one year of such termination; (b) the optionee dies
while employed by or serving as a consultant, sales representative or director
to the Company or any affiliate of the Company, or within three months after
termination of such relationship, in which case the option may, but need not,
provide that it may be exercised (to the extent the option was exercisable at
the time of the optionee's death) within eighteen months of the optionee's death
by the person or persons to whom the rights to such option pass by will or by
the laws of descent and distribution; or (c) the option, by its terms,
specifically provides otherwise. Individual options, by their terms, may provide
for exercise within a longer period of time following termination of employment
or the consulting relationship. The option term may also be extended in the
event that exercise of the option within these periods is prohibited for
specified reasons.
 
ADJUSTMENT PROVISIONS
 
    If there is any change in the stock subject to the 1990 Option Plan or
subject to any option granted under the 1990 Option Plan (through merger,
consolidation, reorganization, recapitalization, stock dividend, dividend in
property other than cash, stock split, liquidating dividend, combination of
shares, exchange of shares, change in corporate structure or otherwise), the
1990 Option Plan and options outstanding thereunder will be appropriately
adjusted as to the class and the maximum number of shares subject to such plan
and the class, number of shares and price per share of stock subject to such
outstanding options.
 
EFFECT OF CERTAIN CORPORATE EVENTS
 
    The 1990 Option Plan provides that, in the event of a dissolution or
liquidation of the Company, or a specified type of merger or other corporate
reorganization, to the extent permitted by law, any surviving corporation will
be required to either assume options outstanding under the 1990 Option Plan or
substitute similar options for those outstanding under such Plans, or, at the
discretion of the Board, (a) such outstanding options will continue in full
force and effect, (b) the time during which such options may be exercised will
be accelerated and the options terminated if not exercised during such time or
(c) the
 
                                       6
<PAGE>
options will be terminated. The acceleration of an option in the event of an
acquisition or similar corporate event may be viewed as an antitakeover
provision, which may have the effect of discouraging a proposal to acquire or
otherwise obtain control of the Company.
 
DURATION, TERMINATION AND AMENDMENT
 
    The Board may suspend or terminate the 1990 Option Plan without shareholder
approval or ratification at any time or from time to time. Unless sooner
terminated, the 1990 Option Plan will terminate on September 27, 2000.
 
    The Board may also amend the 1990 Option Plan at any time or from time to
time. However, no amendment will be effective unless approved by the
shareholders of the Company within twelve months before or after its adoption by
the Board if the amendment would: (a) modify the requirements as to eligibility
for participation (to the extent such modification requires shareholder approval
in order for the Plan to satisfy Section 422 of the Code, if applicable, or Rule
16b-3 of the Securities Exchange Act of 1934); (b) increase the number of shares
reserved for issuance upon exercise of options; or (c) change any other
provision of the Plan in any other way if such modification requires shareholder
approval in order to comply with Rule 16b-3 or satisfy the requirements of
Section 422 of the Code.
 
RESTRICTIONS ON TRANSFER
 
    Under the 1990 Option Plan, an option may not be transferred by the optionee
otherwise than by will or by the laws of descent and distribution. During the
lifetime of an optionee, an option may be exercised only by the optionee. In
addition, shares subject to repurchase by the Company under an early exercise
stock purchase agreement may be subject to restrictions on transfer which the
Board deems appropriate.
 
FEDERAL INCOME TAX INFORMATION
 
    Incentive Stock Options. Incentive stock options under the 1990 Option Plan
are intended to be eligible for the favorable federal income tax treatment
accorded "incentive stock options" under the Code.
 
    There generally are no federal income tax consequences to the optionee or
the Company by reason of the grant or exercise of an incentive stock option.
However, the exercise of an incentive stock option may increase the optionee's
alternative minimum tax liability, if any.
 
    If an optionee holds stock acquired through exercise of an incentive stock
option for at least two years from the date on which the option is granted and
one year from the date on which the shares are transferred to the optionee upon
exercise of the option, any gain or loss on a disposition of such stock will be
capital gain or loss, which will be long-term if the stock was held for more
than eighteen months, mid-term if held for eighteen months or less and more than
one year, and short-term if held for twelve months or less. Generally, if the
optionee disposes of the stock before the expiration of either of these holding
periods (a "disqualifying disposition"), at the time of disposition, the
optionee will realize taxable ordinary income equal to the lesser of (a) the
excess of the stock's fair market value on the date of exercise over the
exercise price or (b) the optionee's actual gain, if any, on the purchase and
sale. The optionee's additional gain or any loss upon the disqualifying
disposition will be a capital gain or loss, which will be long-term if the stock
was held for more than eighteen months, mid-term if held for eighteen months or
less and more than one year, and short-term if held for twelve months or less.
Slightly different rules may apply to optionees who acquire stock subject to
certain repurchase options or who are subject to Section 16(b) of the Securities
Exchange Act of 1934 (the "Exchange Act").
 
    To the extent the optionee recognizes ordinary income by reason of a
disqualifying disposition, the Company will be entitled (subject to the
requirement of reasonableness, the provisions of Section 162(m) of the Code and
the satisfaction of a tax reporting obligation) to a corresponding business
expense deduction in the tax year in which the disqualifying disposition occurs.
 
                                       7
<PAGE>
    SUPPLEMENTAL STOCK OPTIONS.  Supplemental stock options granted under the
1990 Option Plan generally have the following federal income tax consequences:
 
    There are no tax consequences to the optionee or the Company by reason of
the grant of a supplemental stock option. Upon exercise of a supplemental stock
option, the optionee normally will recognize taxable ordinary income equal to
the excess of the stock's fair market value on the date of exercise over the
option exercise price. Generally, with respect to employees, the Company is
required to withhold from regular wages or supplemental wage payments an amount
based on the ordinary income recognized. Subject to the requirement of
reasonableness, the provisions of Section 162(m) of the Code and the
satisfaction of a tax reporting obligation, the Company will generally be
entitled to a business expense deduction equal to the taxable ordinary income
realized by the optionee. Upon disposition of the stock, the optionee will
recognize a capital gain or loss equal to the difference between the selling
price and the sum of the amount paid for such stock plus any amount recognized
as ordinary income upon exercise of the option, which will be long-term if the
stock was held for more than eighteen months, mid-term if held for eighteen
months or less and more than one year, and short-term if held for twelve months
or less. Slightly different rules may apply to optionees who acquire stock
subject to certain repurchase options or who are subject to Section 16(b) of the
Exchange Act.
 
    POTENTIAL LIMITATION ON COMPANY DEDUCTIONS.  As part of the Omnibus Budget
Reconciliation Act of 1993, the U.S. Congress amended the Code to add Section
162(m), which denies a deduction to any publicly held corporation for
compensation paid to certain employees in a taxable year to the extent that
compensation exceeds $1,000,000 for a covered employee. It is possible that
compensation attributable to stock options, when combined with all other types
of compensation received by a covered employee from the Company, may cause this
limitation to be exceeded in any particular year.
 
    Certain kinds of compensation, including qualified "performance-based
compensation," are disregarded for purposes of the deduction limitation. In
accordance with Treasury regulations issued under Section 162(m), compensation
attributable to stock options will qualify as performance-based compensation,
provided that: (i) the option plan contains a per-employee limitation on the
number of shares for which options may be granted during a specified period;
(ii) the per-employee limitation is approved by the shareholders; (iii) the
option is granted by a compensation committee comprised solely of "outside
directors"; and (iv) either the exercise price of the option is no less than the
fair market value of the stock on the date of grant, or the option is granted
(or exercisable) only upon the achievement (as certified by the compensation
committee) of an objective performance goal established in writing by the
compensation committee while the outcome is substantially uncertain.
 
                                       8
<PAGE>
                             SECURITY OWNERSHIP OF
                    CERTAIN BENEFICIAL OWNERS AND MANAGEMENT
 
    The following table sets forth certain information regarding the ownership
of the Company's Common Stock as of November 28, 1997 by: (i) each nominee for
director; (ii) each of the executive officers named in the Summary Compensation
Table; (iii) all executive officers and directors of the Company as a group; and
(iv) all those known by the Company to be beneficial owners of more than five
percent of its Common Stock.
 
<TABLE>
<CAPTION>
                                                                                             BENEFICIAL OWNERSHIP(1)
                                                                                            -------------------------
                                                                                            NUMBER OF    PERCENT OF
BENEFICIAL OWNER                                                                              SHARES        TOTAL
- ------------------------------------------------------------------------------------------  ----------  -------------
<S>                                                                                         <C>         <C>
William R. Lonergan(2)....................................................................      27,558            *
Jack H. King(2)...........................................................................     610,846          3.8%
Catherine P. Lego(2)......................................................................      25,500            *
William M. Regitz(2)......................................................................      38,500            *
Robert H. Welch(2)........................................................................      15,000            *
James A. Hogan(2).........................................................................      25,000            *
Henry C. Harris(2)........................................................................     258,926          1.6%
John R. Conaway(2)........................................................................      37,000            *
Arthur L. Chait(2)........................................................................      22,501            *
All executive officers and directors as a group (10 persons)(2)...........................   1,061,431          6.5%
</TABLE>
 
- ------------------------
 
*   Less than one percent.
 
(1) This table is based upon information supplied by officers, directors and
     principal shareholders and Schedules 13D and 13G, if any, filed with the
    Commission. Unless otherwise indicated in the footnotes to this table and
    subject to community property laws, where applicable, each of the
    shareholders named in this table has sole voting and investment power with
    respect to the shares indicated as beneficially owned. Applicable
    percentages are based on 15,749,251 shares outstanding on November 28, 1997,
    adjusted as required by rules promulgated by the Commission.
 
(2) Includes shares which certain executive officers, directors and principal
     shareholders of the Company have the right to acquire within 60 days after
    the date of this table pursuant to outstanding options as follows: William
    R. Lonergan, 26,000 shares; Jack H. King, 265,000 shares; Catherine P. Lego,
    25,500 shares; William M. Regitz, 4,500 shares; Robert H. Welch, 15,000
    shares; James A. Hogan, 25,000 shares; Henry C. Harris, 245,000 shares; John
    R. Conaway, 37,000 shares; Arthur L. Chait, 22,501 shares, and all executive
    officers and directors as a group, 665,501 shares.
 
SECTION 16(A) BENEFICIAL OWNERSHIP COMPLIANCE
 
    Section 16(a) of the Exchange Act requires the Company's directors and
executive officers, and persons who own more than ten percent of a registered
class of the Company's equity securities, to file with the Commission initial
reports of ownership and reports of changes in ownership of Common Stock and
other equity securities of the Company. Officers, directors and greater than ten
percent shareholders are required by Commission regulation to furnish the
Company with copies of all Section 16(a) forms they file.
 
    To the Company's knowledge, based solely on a review of the copies of such
reports furnished to the Company and written representations that no other
reports were required, during the fiscal year ended September 30, 1997, all
Section 16(a) filing requirements applicable to its officers, directors and
greater than ten percent beneficial owners were complied with; except that one
report, covering two transactions was filed late by Mr. Chait; one report,
covering one transaction was filed late by Mr. Hogan, and one report, covering
one transaction was filed late by Mr. Lonergan.
 
                                       9
<PAGE>
                             EXECUTIVE COMPENSATION
 
COMPENSATION OF DIRECTORS
 
    Each non-employee director of the Company receives a per meeting fee of
$1,500. In the fiscal year ended September 30, 1997, the total paid to
non-employee directors for meeting fees was $30,000. In addition, Mr. Lonergan
was reimbursed $5,177.24 for out-of-pocket expenses in connection with his
attendance at Board meetings.
 
    In April 1995, the Board adopted the 1995 Non-Employee Directors' Plan (the
"Directors' Plan") to provide for the automatic grant of options to purchase
shares of Common Stock to Non-Employee Directors of the Company. On February 27,
1997, the date of the Annual Meeting of Shareholders, each person who was then a
Non-Employee Director and had been a Non-Employee Director of the Company for at
least three months, was granted an option to purchase 6,000 shares of the Common
Stock of the Company under the Directors' Plan. Messrs. Lonergan, Regitz and
Welch and Ms. Lego each received such a grant. The grants have an exercise price
of $33.00 per share, the fair market value on the grant date. Such option has a
term of ten years and becomes exercisable in equal quarterly installments over a
period of one year from the date of grant.
 
                                       10
<PAGE>
COMPENSATION OF EXECUTIVE OFFICERS
 
                            SUMMARY OF COMPENSATION
 
    The following table shows for the fiscal years ending September 30, 1995,
1996 and 1997, compensation awarded or paid to, or earned by the Company's Chief
Executive Officer, and its other four most highly compensated executive officers
at September 30, 1997 (the "Named Executive Officers"):
 
                           SUMMARY COMPENSATION TABLE
 
<TABLE>
<CAPTION>
                                                                                         LONG-TERM COMPENSATION AWARDS
                                                                                        --------------------------------
                                 ANNUAL COMPENSATION                                     NUMBER OF
- --------------------------------------------------------------------------------------   SECURITIES         OTHER
                                                               SALARY(1)                 UNDERLYING    COMPENSATION(2)
NAME AND PRINCIPAL POSITION                           YEAR        ($)      BONUS ($)    OPTIONS (#)          ($)
- --------------------------------------------------  ---------  ---------  ------------  ------------  ------------------
<S>                                                 <C>        <C>        <C>           <C>           <C>
Jack H. King .....................................       1997    251,631       --          60,000            2,117
  President and                                          1996    240,000     20,000             0            1,770
  Chief Executive Officer                                1995    229,904     14,600        50,000            1,469
 
James A. Hogan ...................................       1997    139,907     25,000(3)    118,000(4)             0
  Vice President and General                             1996     --           --            --               --
  Manager, Intelligent                                   1995     --           --            --               --
  Storage Systems Division
 
Henry C. Harris ..................................       1997    159,824       --          20,000              715
  Senior Vice President                                  1996    150,557      4,513        40,000              638
  Strategic Planning                                     1995    140,975     19,000        20,000              569
  and Alliances
 
John R. Conaway ..................................       1997    151,964       --          20,000                0
  Vice President,                                        1996    145,638      4,000        10,000                0
  Operations                                             1995    138,254      8,500        30,000                0
 
Arthur L. Chait ..................................       1997    119,808     30,000(3)     69,301(4)         3,870(5)
  Vice President and                                     1996     --           --            --               --
  General Manager,                                       1995     --           --            --               --
  Solution Services Division
</TABLE>
 
- ------------------------
 
(1) Includes amounts deferred pursuant to Section 401(k) of the Internal Revenue
     Code of 1986, as amended.
 
(2) Unless otherwise noted, represents life insurance premiums for the benefit
     of the Named Executive Officers.
 
(3) Represents a bonus guaranteed in connection with the acceptance of
     employment by Messrs. Hogan and Chait, as set forth in their employment
    agreements.
 
(4) Certain options canceled and repriced during fiscal year ended September 30,
     1997. See "Ten Year Option Repricings."
 
(5) Represents automobile allowance.
 
                                       11
<PAGE>
                       STOCK OPTION GRANTS AND EXERCISES
 
    The following tables show for the fiscal year ended September 30, 1997
certain information regarding options granted to, exercised by, and held at year
end by the Named Executive Officers:
 
                       OPTION GRANTS IN LAST FISCAL YEAR
 
<TABLE>
<CAPTION>
                                               INDIVIDUAL GRANTS
                                          ----------------------------                           POTENTIAL REALIZABLE
                                           NUMBER OF                                               VALUE AT ASSUMED
                                          SECURITIES     % OF TOTAL                             ANNUAL RATES OF STOCK
                                          UNDERLYING      OPTIONS/      EXERCISE                PRICE APPRECIATION FOR
                                           OPTIONS/      GRANTED TO      OR BASE                    OPTION TERM(1)
                                            GRANTED     EMPLOYEES IN      PRICE    EXPIRATION   ----------------------
NAME                                        (#)(2)     FISCAL YEAR (%)   ($/SH)       DATE        5% ($)     10% ($)
- ----------------------------------------  -----------  ---------------  ---------  -----------  ----------  ----------
<S>                                       <C>          <C>              <C>        <C>          <C>         <C>
Jack H. King............................      60,000            6.0     17.435       11/06/06      659,043   1,663,299
 
James A. Hogan..........................     100,000            9.9     19.125       10/30/06    1,204,875   3,040,875
 
                                              18,001            1.8     20.5625      03/31/07      233,192     588,531
 
Henry C. Harris.........................      20,000            2.0     17.4375      11/06/06      219,681     554,433
 
John R. Conaway.........................      20,000            2.0     17.4375      11/06/06      219,681     554,433
 
Arthur L. Chait.........................      69,301            6.9     20.5625      01/21/07      897,751   2,265,752
                                                                                     02/26/07
</TABLE>
 
- ------------------------
 
(1) Calculated on the assumption that the market value of the underlying stock
     increases at the stated values compounded annually for the ten-year term of
    the options.
 
(2) Such options generally vest over a (i) four-year period with 25% of the
     options vesting in each of the first four years of its ten-year term or
    (ii) three-year period with 33.33% of the options vesting in each of the
    first three years of its ten-year term. The Board of Directors may reprice
    or accelerate the options under the terms of the 1990 Option Plan.
 
                                       12
<PAGE>
    The following table sets forth for the fiscal year ended September 30, 1997
options exercised by and held at year end by the Named Executive Officers.
 
    AGGREGATED OPTION EXERCISES IN LAST FISCAL YEAR AND FY-END OPTION VALUES
 
<TABLE>
<CAPTION>
                                                                            NUMBER OF
                                                                           SECURITIES            VALUE OF
                                                                           UNDERLYING           UNEXERCISED
                                                                           UNEXERCISED         IN-THE-MONEY
                                                                           OPTIONS AT           OPTIONS AT
                                                            VALUE          FY-END (#)           FY-END ($)
                                       SHARES ACQUIRED     REALIZED       EXERCISABLE/         EXERCISABLE/
NAME                                   ON EXERCISE (#)      ($)(1)        UNEXERCISABLE      UNEXERCISABLE(2)
- -------------------------------------  ---------------  --------------  -----------------  ---------------------
<S>                                    <C>              <C>             <C>                <C>
Jack H. King.........................       276,924         6,707,792     350,000/110,000    7,927,500/1,327,500
 
James A. Hogan.......................             0           --                0/118,001              0/608,379
 
Henry C. Harris......................        15,000           287,813           245,000/0            4,776,000/0
 
John R. Conaway......................         3,000           112,688       23,500/44,500        423,906/577,719
 
Arthur L. Chait......................             0           --                 0/69,301              0/272,873
</TABLE>
 
- ------------------------
 
(1) Value realized is based upon the fair market value of the Company's Common
     Stock on the date of exercise less the exercise price and does not
    necessarily indicate that the optionee sold such stock.
 
(2) The fair market value of the Company's Common Stock at September 30, 1997
     ($24.50) less the exercise price of the options. The fair market value of
    the Company's Common Stock on December 19, 1997 was $11.25.
 
                          OPTION REPRICING INFORMATION
 
    The following table shows certain information concerning the repricing of
options received by the Named Executive Officers during the last ten years.
 
                           TEN YEAR OPTION REPRICINGS
 
<TABLE>
<CAPTION>
                                                                                                             LENGTH OF
                                                     NUMBER OF      MARKET                                   ORIGINAL
                                                    SECURITIES     PRICE OF       EXERCISE                    OPTION
                                                    UNDERLYING     STOCK AT       PRICE AT                     TERM
                                                      OPTIONS       TIME OF        TIME OF                   REMAINING
                                                     REPRICED      REPRICING      REPRICING        NEW      AT DATE OF
                                                        OR            OR             OR         EXERCISE     REPRICING
                                                      AMENDED      AMENDMENT      AMENDMENT       PRICE         OR
NAME                                       DATE         (#)           ($)            ($)           ($)       AMENDMENT
- ---------------------------------------  ---------  -----------  -------------  -------------  -----------  -----------
<S>                                      <C>        <C>          <C>            <C>            <C>          <C>
Jack H. King...........................     --          --            --             --            --           --
 
James A. Hogan.........................   08/26/97      18,001(1)       20.56         29.75         20.56    9.6 years
 
Henry C. Harris........................     --          --            --             --            --           --
 
John R. Conaway........................   03/24/88      15,000          1.50           2.25          1.50    9.2 years
 
Arthur L. Chait........................   08/26/97      67,501(1)       20.56         43.25         20.56    9.4 years
 
                                          08/26/97       1,800(1)       20.56         33.00         20.56    9.5 years
</TABLE>
 
- ------------------------
 
(1) Pursuant to the terms of the August 26, 1997 offer to reprice certain
     outstanding options, Mr. Hogan agreed to the cancellation of options for
    20,000 shares and Mr. Chait agreed to the cancellation of options for 75,000
    and 2,000 shares, respectively.
 
                                       13
<PAGE>
                       PERFORMANCE MEASUREMENT COMPARISON
 
    The following chart shows the value of an investment of $100 on September
30, 1992 in cash of (i) the Company's Common Stock, (ii) the NASDAQ Stock
Market-US Index and (iii) the Hambrecht & Quist Technology Index. All values
assume reinvestment of the full amount of all dividends and are calculated as of
September 30 of each year: (1)
 
                COMPARSION OF FIVE YEAR CUMULATIVE TOTAL RETURN*
         AMONG ZITEL CORPORATION, THE NASDAQ STOCK MARKET (U.S.) INDEX
                   AND THE HAMBRECT & QUIST TECHNOLOGY INDEX
 
EDGAR REPRESENTATION OF DATA POINTS USED IN PRINTED GRAPHIC
 
<TABLE>
<CAPTION>
              ZITEL CORPORATION        NASDAQ STOCK MARKET (U.S.)          HAMBRECHT & QUIST TECHNOLOGY
<S>        <C>                      <C>                               <C>
9/92                          $100                              $100                                     $100
9/93                            53                               131                                      132
9/94                           110                               132                                      151
9/95                           147                               182                                      264
9/96                           255                               216                                      290
9/97                           632                               297                                      432
</TABLE>
 
    *  $100 INVESTED ON 9/30/92 IN STOCK OR INDEX INCLUDING REINVESTMENT OF
       DIVIDENDS. FISCAL YEAR ENDING SEPTEMBER 30.
 
- ------------------------
 
(1) This section is not "soliciting material," is not deemed filed with the SEC
     and is not to be incorporated by reference in any filing of the Company
    under the 1933 Act or the 1934 Act whether made before or after the date
    hereof and irrespective of any general incorporation language in any such
    filing.
 
                                       14
<PAGE>
         REPORT OF THE COMPENSATION COMMITTEE OF THE BOARD OF DIRECTORS
                          ON EXECUTIVE COMPENSATION(1)
 
    The Company's executive compensation generally consists of a base salary, a
cash bonus and long-term incentive stock options. Annual compensation for
executive officers and certain non-officer vice presidents of the Company, other
than the President, is recommended by the President and is reviewed and approved
by the Compensation Committee. The individual salary recommendations may vary
based on the President's judgment regarding the value of a position in the
Company, performance of the executive and comparative compensation for like
positions at other companies of similar size in their area, derived from salary
survey data and other sources.
 
    The annual compensation for the President is recommended by the Compensation
Committee and approved by the non-employee members of the Board of Directors.
The Committee determines the President's annual compensation based on the same
criteria and the same survey as used for officers, with the objective of placing
his salary at the median for Presidents of comparable companies.
 
    The Company believes that compensation of the key executives should be
sufficient to attract and retain highly qualified personnel and should also
provide meaningful incentives for measurable superior performance. The Company
seeks to reward achievement of long-term and short-term performance goals. The
Company currently does not provide retirement benefits to its executive
officers, other than the availability of a 401(k) plan.
 
    During fiscal year 1997, the Company did not establish a formal bonus plan.
In accordance with offers of employment, two bonuses were paid during the year
to officers of the Company.
 
    The Compensation Committee uses stock option grants to further align the
interests of shareholders and management by creating common incentives related
to the possession by management of a substantial economic interest in the
long-term appreciation of the Company's Common Stock. The Committee considers
the number of options previously granted and the proportion that have vested in
making its decisions. Stock option grants, other than for the President, are
made periodically at the recommendation of the President with the approval of
the Compensation Committee. The Committee makes option grants to the President
on the same basis as for other officers. Options are granted at the full market
value on the date of grant. In light of these factors, and in order to provide
an incentive to management to achieve the Company's operational goals, in
November 1996, the Committee approved a grant of 20,000 to both the Vice
President, Finance and Administration and Vice President, Operations and 60,000
shares to the President at $17.4375 per share. In April 1997, the Committee
approved a grant of 20,000 shares to the Vice President, Sales and Marketing at
$20.5625 per share. In addition, the Committee granted a total of 257,000 shares
to three different officers hired during the year at prices ranging from $19.125
to $43.25. In order to preserve the incentive effects of stock option grants in
light of the Company's volatile stock price, the Compensation Committee
determined on July 31, 1997 to offer to reprice all options granted at a price
equal to or greater than $29.75 to the fair market value on the acceptance date
of August 26, 1997. To effect the repricing, the existing options were cancelled
and new options were granted equal to 90% of the original number of shares
granted. The vesting schedule of the new options remained the same as the
original options. These stock options included the stock options of two officers
totaling 97,000 shares at prices ranging from $29.75 to $43.25 which were
repriced and for which 87,302 shares were reissued at a price of $20.56.
 
- ------------------------
 
(1) This section is not "soliciting material," is not deemed filed with the SEC
     and is not to be incorporated by reference in any filing of the Company
    under the 1933 Act or the 1934 Act whether made before or after the date
    hereof and irrespective of any general incorporation language in any such
    filing.
 
                                       15
<PAGE>
    The Compensation Committee has not yet established a policy for determining
which forms of incentive compensation awarded to its Named Executive Officers
shall be designed to qualify as "performance-based compensation."
 
    During fiscal year 1997, the Company reported a decrease in revenue of 22%
and a reported net loss of $1.15 per share. Accordingly, the Compensation
Committee did not approve a discretionary bonus for the officers. In July 1997,
the Committee approved a raise for one officer totaling 16.7% effective
September 1, 1997. No other raises were given to officers during the year. The
President's salary was unchanged during the year.
 
                                          COMPENSATION COMMITTEE
                                          William R. Lonergan
                                          William M. Regitz
                                          Robert H. Welch
 
COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION
 
    As noted above, the Company's Compensation Committee consists of Messrs.
Lonergan, Regitz and Welch. Mr. Welch served as President, Chief Executive
Officer and Director of the Company from 1979 to October 1986. Mr. Welch was
Chairman of the Board of the Company from October 1986 to November 1987 and has
remained a Director since that date.
 
                                 OTHER MATTERS
 
    The Board of Directors knows of no other matters that will be presented for
consideration at the Annual Meeting. If any other matters are properly brought
before the meeting, it is the intention of the persons named in the accompanying
proxy to vote on such matters in accordance with their best judgment.
 
                                          By Order of the Board of Directors
                                          Larry B. Schlenoff
                                          SECRETARY
 
DECEMBER 29, 1997
 
                                       16
<PAGE>
                                       
                              ZITEL CORPORATION 

                             1990 STOCK OPTION PLAN
                             ----------------------

              Adopted by the Board of Directors September 27, 1990
                            Effective October 1, 1990
                  Approved by the Shareholders January 25, 1991
                Amended by the Board of Directors October 31, 1991
                   Approved by the Shareholders January 30, 1992
                Amended by the Board of Directors September 21, 1994
                   Approved by the Shareholders January 26, 1995
                 Amended by the Board of Directors November 7, 1996
                   Approved by the Shareholders February 27, 1997
                 Amended by the Board of Directors October 30, 1997


     1.  PURPOSE.

         (a)  The purpose of the Plan is to provide a means by which selected 
key employees, including directors of, sales representatives for, and 
consultants to Zitel Corporation, a California corporation (the "Company"), 
and its Affiliates, as defined in subparagraph 1(b), may be given an 
opportunity to purchase stock of the Company. 

         (b)  The word "Affiliate" as used in the Plan means any parent 
corporation or subsidiary corporation of the Company, as those terms are 
defined in Sections 425(e) and (f), respectively, of the Internal Revenue 
Code of 1986, as amended from time to time (the "Code"). 

         (c)  The Company, by means of the Plan, seeks to retain the services 
of persons now employed by or having key relationships with the Company, to 
secure and retain the services of persons capable of filling such positions, 
and to provide incentives for such persons to exert maximum efforts for the 
success of the Company. 

         (d)  The Company intends that the options issued under the Plan 
shall, in the discretion of the Board of Directors of the Company (the 
"Board") or any committee to which 


                                       1
<PAGE>

responsibility for administration of the Plan has been delegated pursuant to 
subparagraph 2(c), be either incentive stock options as that term is used in 
Section 422A of the Code ("Incentive Stock Options"), or options which do not 
qualify as incentive stock options ("Supplemental Stock Options").  All 
options shall be separately designated Incentive Stock Options or 
Supplemental Stock Options at the time of grant, and in such form as issued 
pursuant to paragraph 5, and a separate certificate or certificates shall be 
issued for shares purchased on exercise of each type of option.  An option 
designated as a Supplemental Stock Option shall not be treated as an 
incentive stock option. 

    2.  ADMINISTRATION.  

    (a)  The Plan shall be administered by the Board unless and until the 
Board delegates administration to a committee, as provided in subparagraph 
2(c); provided, however, that if and to the extent required in order to 
comply with the disinterested administration requirements of Rule 16b-3, as 
amended from time to time, promulgated under the Securities Exchange Act of 
1934, as amended (the "Exchange Act") or any successor rule ("Rule 16b-3"), 
the Plan shall be administered by a committee as provided in subparagraph 
2(c).  Such requirements of Rule 16b-3 are hereinafter referred to as the 
"Disinterested Administration Requirements."  Except to the extent precluded 
by the Disinterested Administration Requirements, whether or not the Board 
has delegated administration, the Board shall have the final power to 
determine all questions of policy and expediency that may arise in the 
administration of the Plan. 

         (b)  The Board (or the Committee, as defined below) shall have the 
power, subject to, and within the limitations of, the express provisions of 
the Plan:


                                       2
<PAGE>

              (1)  To determine from time to time which of the persons 
eligible under the Plan shall be granted options; when and how the option 
shall be granted; whether the option will be an Incentive Stock Option or a 
Supplemental Stock Option; the provisions of each option granted (which need 
not be identical), including the time or times during the term of each option 
within which all or portions of such option may be exercised; and the number 
of shares for which an option shall be granted to each such person.

              (2)  To construe and interpret the Plan and options granted 
under it, and to establish, amend and revoke rules and regulations for its 
administration and otherwise to make decisions concerning the Plan.  The 
Board, in the exercise of this power, may correct any defect, omission or 
inconsistency in the Plan or in any option agreement, in a manner and to the 
extent it shall deem necessary or expedient to make the Plan fully effective.

              (3)  To amend the Plan as provided in paragraph 10.

              (4)  Generally, to exercise such powers and to perform such 
acts as the Board (or the Committee, as defined below) deems necessary or 
expedient to promote the best interests of the Company. 

         (c)  The Board may, and under the circumstances set forth in 
subparagraph 2(a) shall, delegate administration of the Plan to a committee 
composed of not fewer than three (3) members or such greater or lesser number 
as may be required to comply with the Disinterested Administration 
Requirements (the "Committee").  To the extent required to comply with the 
Disinterested Administration Requirements, the members of such Committee 
shall also be members of the Board and shall be disinterested persons, as 
defined by the provisions of subparagraph 2(d).  If administration is 
delegated to a Committee, the Committee shall have, in connection with the 
administration of the Plan, the powers theretofore possessed by the Board, 


                                       3
<PAGE>

subject, however, to such resolutions, not inconsistent with the provisions 
of the Plan and the Disinterested Administration Requirements, as may be 
adopted from time to time by the Board.  Unless precluded by the 
Disinterested Administration Requirements, the Board may (i) abolish the 
Committee at any time and revest in the Board the administration of the Plan, 
or (ii) expressly determine that the requirement that the Committee be 
composed of three (3) members be waived and may delegate administration of 
the Plan to any person or persons and the term "Committee" shall apply to any 
person or persons to whom such authority has been delegated.

         (d)  The term "disinterested person," as used in this Plan, shall 
mean an administrator of the Plan, whether a member of the Board or of any 
Committee to which responsibility for administration of the Plan has been 
delegated pursuant to subparagraph 2(c), who is a "disinterested person" 
within the meaning of Rule 16b-3 or otherwise in accordance with the rules, 
regulations or interpretations of the Securities and Exchange Commission.  
Any such person shall otherwise comply with the requirements of Rule 16b-3 
including, without limitation, any limitation contained therein on 
eligibility of a "disinterested person" to participate in plans of the 
Company or any affiliate (as defined under the Exchange Act) of the Company.

    3.   SHARES SUBJECT TO THE PLAN.

         (a)  Subject to the provisions of paragraph 9 relating to 
adjustments upon changes in stock, the stock that may be sold pursuant to 
options granted under the Plan shall not exceed in the aggregate six million 
two hundred thousand (6,200,000) shares of the Company's common stock; 
provided, however, that such aggregate number of shares shall be reduced to 
reflect the number of shares of the Company's common stock which has been 
sold under, or may be sold pursuant to options granted under, the Company's 
1982 Incentive Stock Option Plan or the Company's 1984 Supplemental Stock 
Option Plan to the same extent as if such sales had been 


                                       4
<PAGE>

made or options granted pursuant to this Plan.  If any option granted under 
the Plan shall for any reason expire or otherwise terminate without having 
been exercised in full, the stock not purchased under such option shall again 
become available for the Plan. 

         (b)  The stock subject to the Plan may be unissued shares or 
reacquired shares, bought on the market or otherwise. 

         (c)  An Incentive Stock Option may be granted to an eligible person 
under the Plan only if the aggregate fair market value (determined at the 
time the option is granted) of the stock with respect to which incentive 
stock options (as defined in the Code) granted after 1986 are exercisable for 
the first time by such optionee during any calendar year under all incentive 
stock option plans of the Company and its Affiliates does not exceed one 
hundred thousand dollars ($100,000).  Should it be determined that an option 
granted under the Plan exceeds such maximum for any reason other than the 
failure of a good faith attempt to value the stock subject to the option, 
such option shall be considered a Supplemental Stock Option to the extent, 
but only to the extent, of such excess; provided, however, that should it be 
determined that an entire option or any portion thereof does not qualify for 
treatment as an incentive stock option by reason of exceeding such maximum, 
such option or the applicable portion shall be considered a Supplemental 
Stock Option. 

    4.   ELIGIBILITY.

         (a)  Incentive Stock Options may be granted only to employees 
(including officers) of the Company or its Affiliates.  A director of the 
Company shall not be eligible to receive Incentive Stock Options unless such 
director is also an employee (including an officer) of the Company or any 
Affiliate.  Supplemental Stock Options may be granted only to key employees 


                                       5
<PAGE>

(including officers) of, directors of, sales representatives for, or 
consultants to the Company or its Affiliates.  A director of the Company 
shall not be eligible for a Supplemental Stock Option unless such director is 
also an employee (including an officer) of, sales representative for, or 
consultant to the Company or any Affiliate.

         (b)  A director shall in no event be eligible for the benefits of 
the Plan unless and until such director is expressly declared eligible to 
participate in the Plan by action of the Board or the Committee, and only if, 
at any time discretion is exercised by the Board in the selection of a 
director as a person to whom options may be granted, or in the determination 
of the number of shares which may be covered by options granted to a 
director, the Disinterested Administration Requirements are satisfied and the 
Plan otherwise complies with the requirements of Rule 16b-3.  The Board shall 
otherwise comply with the requirements of Rule 16b-3.

         (c)  No person shall be eligible for the grant of an Incentive Stock 
Option under the Plan if, at the time of grant, such person owns (or is 
deemed to own pursuant to Section 425(d) of the Code) stock possessing more 
than ten percent (10%) of the total combined voting power of all classes of 
stock of the Company or of any of its Affiliates unless the exercise price of 
such option is at least one hundred ten percent (110%) of the fair market 
value of such stock at the date of grant and the term of the option does not 
exceed five (5) years from the date of grant. 

         (d)  If required to comply with the Disinterested Administration 
Requirements, no person who acts as an administrator of the Plan shall be 
eligible for selection as a person to whom options may be granted under the 
Plan for a period of one (1) year (or such longer or shorter period of time 
as may be required to comply with the Disinterested Administration 
Requirements) following the time such person last exercised discretion in 
administering the Plan.  


                                       6
<PAGE>

No person who acts as an administrator of any other plan of the Company in 
which members of the Board are eligible for selection as persons to whom 
securities may be granted shall be eligible for selection as a person to whom 
options may be granted under the Plan for a period of one (1) year (or such 
longer or shorter period of time as may be required to comply with the 
Disinterested Administration Requirements) following the time such person 
last exercised discretion in administering such plan; provided, however, that 
such limitation on eligibility shall be applicable if and only to the extent 
required to comply with the Disinterested Administration Requirements with 
respect to such plan.

    5.  OPTION PROVISIONS.

         Each option shall be in such form and shall contain such terms and 
conditions as the Board or the Committee shall deem appropriate.  The 
provisions of separate options need not be identical, but each option shall 
include (through incorporation of provisions hereof by reference in the 
option or otherwise) the substance of each of the following provisions: 

         (a)  The term of any option shall not be greater than ten (10) years 
from the date it was granted. 

         (b)  The exercise price of each Incentive Stock Option shall be not 
less than one hundred percent (100%) of the fair market value of the stock 
subject to the option on the date the option is granted.  The exercise price 
of each Supplemental Stock Option shall be not less than eighty-five percent 
(85%) of the fair market value of the stock subject to the option on the date 
the option is granted. 

         (c)  The purchase price of stock acquired pursuant to an option 
shall be paid, to the extent permitted by applicable statutes and 
regulations, either (i) in cash at the time the option is exercised, or (ii) 
at the discretion of the Board or the Committee, either at the time of 


                                       7
<PAGE>

the grant or exercise of the option, (A) by delivery to the Company of other 
common stock of the Company, (B) according to a deferred payment or other 
arrangement (which may include, without limiting the generality of the 
foregoing, the use of other common stock of the Company) with the person to 
whom the option is granted or to whom the option is transferred pursuant to 
subparagraph 5(d), or (C) in any other form of legal consideration that may 
be acceptable to the Board or the Committee. 

         In the case of any deferred payment arrangement, interest shall be 
payable at least annually and shall be charged at the minimum rate of 
interest necessary to avoid the treatment as interest, under any applicable 
provisions of the Code, of any amounts other than amounts stated to be 
interest under the deferred payment arrangement.   

         (d)  An option shall not be transferable except by will or by the 
laws of descent and distribution, and shall be exercisable during the 
lifetime of the person to whom the option is granted only by such person. 

         (e)  The total number of shares of stock subject to an option may, 
but need not, be allotted in periodic installments (which may, but need not, 
be equal).  From time to time during each of such installment periods, the 
option may become exercisable ("vest") with respect to some or all of the 
shares allotted to that period, and may be exercised with respect to some or 
all of the shares allotted to such period and/or any prior period as to which 
the option was not fully exercised.  During the remainder of the term of the 
option (if its term extends beyond the end of the installment periods), the 
option may be exercised from time to time with respect to any shares then 
remaining subject to the option; provided, however, that if and to the extent 
required to satisfy the definition of "plan" within the meaning of Rule 
16b-3, no option granted under the Plan may be exercised as to any shares 
subject to such option until more than six (6) 


                                       8
<PAGE>

months following the date of grant of such option (except in the event of 
death or disability of the optionee) (the "Six Month Limitation").  The 
provisions of this subparagraph 5(e) are subject to any option provisions 
governing the minimum number of shares as to which an option may be 
exercised. 

         (f)  The Company may require any optionee, or any person to whom an 
option is transferred under subparagraph 5(d), as a condition of exercising 
any such option, (1) to give written assurances satisfactory to the Company 
as to the optionee's knowledge and experience in financial and business 
matters and/or to employ a purchaser representative reasonably satisfactory 
to the Company who is knowledgeable and experienced in financial and business 
matters, and that he or she is capable of evaluating, alone or together with 
the purchaser representative, the merits and risks of exercising the option; 
and (2) to give written assurances satisfactory to the Company stating that 
such person is acquiring the stock subject to the option for such person's 
own account and not with any present intention of selling or otherwise 
distributing the stock.  These requirements, and any assurances given 
pursuant to such requirements, shall be inoperative if (i) the issuance of 
the shares upon the exercise of the option has been registered under a then 
currently effective registration statement under the Securities Act of 1933, 
as amended (the "Securities Act"), or (ii) as to any particular requirement, 
a determination is made by counsel for the Company that such requirement need 
not be met in the circumstances under the then applicable securities laws. 

         (g)  An option shall terminate three (3) months after termination of 
the optionee's employment or relationship as a consultant, sales 
representative or director with the Company or an Affiliate, unless (i) such 
termination is due to such person's permanent and total disability, within 
the meaning of Section 422A(c)(7) of the Code, in which case the option may, 
but need

                                       9
<PAGE>

not, provide that it may be exercised at any time within one (1) year 
following such termination of employment or relationship as a consultant, 
sales representative or director; or (ii) the optionee dies while in the 
employ of or while serving as a consultant, sales representative or director 
to the Company or an Affiliate, or within not more than three (3) months 
after termination of such relationship, in which case the option may, but 
need not, provide that it may be exercised at any time within eighteen (18) 
months following the death of the optionee by the person or persons to whom 
the optionee's rights under such option pass by will or by the laws of 
descent and distribution; or (iii) the option by its terms specifies either 
(a) that it shall terminate sooner than three (3) months after termination of 
the optionee's employment or relationship as a consultant, sales 
representative or director, or (b) that it may be exercised more than three 
(3) months after termination of such relationship with the Company or an 
Affiliate.  This subparagraph 5(g) shall not be construed to extend the term 
of any option or to permit anyone to exercise the option after expiration of 
its term, nor shall it be construed to increase the number of shares as to 
which any option is exercisable from the amount exercisable on the date of 
termination of the optionee's employment or relationship as a consultant, 
sales representative or director. 

         (h)  Subject to the Six Month Limitation, the option may, but need 
not, include a provision whereby the optionee may elect at any time during 
the term of his or her employment or relationship as a consultant, sales 
representative or director with the Company or any Affiliate to exercise the 
option as to any part or all of the shares subject to the option prior to the 
stated vesting date of the option or of any installment or installments 
specified in the option.  Any shares so purchased from any unvested 
installment or option may be subject to a

                                      10
<PAGE>

repurchase right in favor of the Company or to any other restriction the 
Board or the Committee determines to be appropriate. 

         (i)  To the extent provided by the terms of an option, the optionee 
may satisfy any federal, state or local tax withholding obligation relating 
to the exercise of such option by any of the following means or by a 
combination of such means:  (1) tendering a cash payment; (2) authorizing the 
Company to withhold from the shares of the common stock otherwise issuable to 
the participant as a result of the exercise of the stock option a number of 
shares having a fair market value less than or equal to the amount of the 
withholding tax obligation; or (3) delivering to the Company owned and 
unencumbered shares of the common stock having a fair market value less than 
or equal to the amount of the withholding tax obligation. 

     6.  COVENANTS OF THE COMPANY.

         (a)  During the terms of the options granted under the Plan, the 
Company shall keep available at all times the number of shares of stock 
required to satisfy such options. 

         (b)  The Company shall seek to obtain from each regulatory 
commission or agency having jurisdiction over the Plan such authority as may 
be required to issue and sell shares of stock upon exercise of the options 
granted under the Plan; provided, however, that this undertaking shall not 
require the Company to register under the Securities Act either the Plan, any 
option granted under the Plan or any stock issued or issuable pursuant to any 
such option.  If, after reasonable efforts, the Company is unable to obtain 
from any such regulatory commission or agency the authority which counsel for 
the Company deems necessary for the lawful issuance and sale of stock under 
the Plan, the Company shall be relieved from any liability for failure to 
issue and sell stock upon exercise of such options unless and until such 
authority is obtained. 

                                      11
<PAGE>

     7.  USE OF PROCEEDS FROM STOCK.

         Proceeds from the sale of stock pursuant to options granted under 
the Plan shall constitute general funds of the Company. 

     8.  MISCELLANEOUS.

         (a)  The Board or the Committee shall have the power to accelerate 
the time at which an option may first be exercised or the time during which 
an option or any part thereof will vest pursuant to subparagraph 5(e), 
notwithstanding the provisions in the option stating the time at which it may 
first be exercised or the time during which it will vest; provided that no 
acceleration of options held by officers or directors of the Company and 
granted less than six months prior to the date of acceleration shall be 
permitted if such acceleration would cause the Plan to fail to qualify for 
the exemption provided by Rule 16b-3. 

         (b)  Neither an optionee nor any person to whom an option is 
transferred under subparagraph 5(d) shall be deemed to be the holder of, or 
to have any of the rights of a holder with respect to, any shares subject to 
such option unless and until such person has satisfied all requirements for 
exercise of the option pursuant to its terms. 

         (c)  Throughout the term of any option granted pursuant to the Plan, 
the Company shall make available to the holder of such option, not later than 
one hundred twenty (120) days after the close of each of the Company's fiscal 
years during the option term, upon request, such financial and other 
information regarding the Company as comprises the annual report to the 
shareholders of the Company provided for in the bylaws of the Company. 

         (d)  Nothing in the Plan or any instrument executed or option 
granted pursuant thereto shall confer upon any eligible employee or optionee 
any right to continue in the employ of the Company or any Affiliate (or to 
continue acting as a consultant, sales representative or

                                      12
<PAGE>

director) or shall affect the right of the Company or any Affiliate to 
terminate the employment or consulting or sales representative relationship 
or directorship of any eligible employee or optionee with or without cause.  
In the event that an optionee is permitted or otherwise entitled to take a 
leave of absence, the Company shall have the unilateral right to (i) 
determine whether such leave of absence will be treated as a termination of 
employment for purposes of paragraph 5(g) hereof and corresponding provisions 
of any outstanding options, and (ii) suspend or otherwise delay the time or 
times at which the shares subject to the option would otherwise vest. 


     9.  ADJUSTMENTS UPON CHANGES IN STOCK. 

         (a)  If any change is made in the stock subject to the Plan, or 
subject to any option granted under the Plan (through merger, consolidation, 
reorganization, recapitalization, stock dividend, dividend in property other 
than cash, stock split, liquidating dividend, combination of shares, exchange 
of shares, change in corporate structure or otherwise), the Plan and 
outstanding options will be appropriately adjusted in the class(es) and 
maximum number of shares subject to the Plan and the class(es) and number of 
shares and price per share of stock subject to outstanding options. 

         (b)  In the event of:  (1) a dissolution or liquidation of the 
Company; (2) a merger or consolidation in which the Company is not the 
surviving corporation; or (3) a reverse merger in which the Company is the 
surviving corporation but the shares of the Company's common stock 
outstanding immediately preceding the merger are converted by virtue of the 
merger into other property, whether in the form of securities, cash or 
otherwise then to the extent permitted by applicable law:  either (i) any 
surviving corporation shall assume any options outstanding under the Plan or 
shall substitute similar options for those outstanding under the Plan, or 
(ii) at

                                      13
<PAGE>

the discretion of the Board or the Committee, (A) such options shall continue 
in full force and effect (B) the time during which such options may be 
exercised shall be accelerated and the options terminated if not exercised 
prior to such event provided that no acceleration of options held by officers 
or directors of the Company and granted less than six months prior to the 
date of acceleration shall be permitted if such acceleration would cause the 
plan to fail to qualify for the exemption provided by Rule 16b-3 or (C) such 
options shall be terminated if not exercised prior to such event.  

     10. AMENDMENT OF THE PLAN. 

         (a)  The Board at any time, and from time to time, may amend the 
Plan.  However, except as provided in paragraph 9 relating to adjustments 
upon changes in stock, no amendment shall be effective unless approved by the 
shareholders of the Company within twelve (12) months before or after the 
adoption of the amendment, where the amendment will:

              (i)   Increase the number of shares reserved for options under 
the Plan;

              (ii)  Modify the requirements as to eligibility for 
participation in the Plan (to the extent such modification requires 
shareholder approval in order for the Plan to satisfy the requirements of 
Section 422A(b) of the Code or to comply with the requirements of Rule 16b-3);

         or

              (iii) Modify the Plan in any other way if such modification 
requires shareholder approval in order for the Plan to satisfy the 
requirements of Section 422A(b) of the Code or to comply with the 
requirements of Rule 16b-3. 

         (b)  It is expressly contemplated that the Board may amend the Plan 
in any respect the Board deems necessary or advisable to provide optionees 
with the maximum benefits provided or to be provided under the provisions of 
the Code and the regulations promulgated

                                      14
<PAGE>

thereunder relating to employee incentive stock options and/or to bring the 
Plan and/or incentive stock options granted under it into compliance 
therewith. 

         (c)  Rights and obligations under any option granted before 
amendment of the Plan shall not be altered or impaired by any amendment of 
the Plan unless (i) the Company requests the consent of the person to whom 
the option was granted and (ii) such person consents in writing. 


     11. TERMINATION OR SUSPENSION OF THE PLAN. 

         (a)  The Board may suspend or terminate the Plan at any time.  
Unless sooner terminated, the Plan shall terminate ten (10) years from the 
date the Plan is adopted by the Board or approved by the shareholders of the 
Company, whichever is earlier.  No options may be granted under the Plan 
while the Plan is suspended or after it is terminated. 

         (b)  Rights and obligations under any option granted while the Plan 
is in effect shall not be altered or impaired by suspension or termination of 
the Plan, except with the consent of the person to whom the option was 
granted.

     12. EFFECTIVE DATE OF PLAN. 

         The Plan shall become effective as determined by the Board, but no 
options granted under the Plan shall be exercised unless and until the Plan has 
been approved by the shareholders of the Company, and, if required, an 
appropriate permit has been issued by the Commissioner of Corporations of the 
State of California.

                                      15


<PAGE>

                           ZITEL CORPORATION

                PROXY SOLICITED BY THE BOARD OF DIRECTORS

         FOR THE ANNUAL MEETING OF SHAREHOLDERS - JANUARY 29, 1998

     Jack H. King or Larry B. Schlenoff, or either of them, each with the 
power of substitution and revocation, are hereby authorized to represent the 
undersigned, with all powers which the undersigned would possess if 
personally present, to vote the Common Stock of the undersigned at the annual 
meeting of shareholders of ZITEL CORPORATION to be held at the Milpitas 
Holiday Inn, 777 Bellew Drive, Milpitas, California 95035, at 3:00 p.m. local 
time on January 29, 1998 and at any postponements or adjournments of that 
meeting, as set forth on the reverse, and in their discretion upon any 
business that may properly come before the meeting.

     THIS PROXY WILL BE VOTED AS SPECIFIED OR, IF NO CHOICE IS SPECIFIED, 
WILL BE VOTED FOR THE ELECTION OF THE NOMINEES NAMED IN PROPOSAL 1, IN FAVOR 
OF THE MATTER DESCRIBED IN PROPOSAL 2 AND, AS SAID PROXIES DEEM ADVISABLE, ON 
SUCH OTHER MATTERS AS MAY PROPERLY COME BEFORE THE MEETING.

              (CONTINUED AND TO BE SIGNED ON REVERSE SIDE)


<PAGE>

/x/ Please mark your 
    votes as in this 
    example.

                    FOR ALL            WITHHOLD     
                NOMINEES LISTED   AUTHORITY TO VOTE
                AT RIGHT (EXCEPT   FOR ALL NOMINEES
                  AS INDICATED)    LISTED AT RIGHT 

1. ELECTION OF         / /              / /       Nominees: William R. Lonergan
   DIRECTORS                                                Jack H. King
                                                            Catherine P. Lego
(INSTRUCTION: To withhold authority to vote for             William M. Regitz
any individual nominee, strike a line through such          Robert H. Welch
nominee's name.)


2. TO APPROVE THE AMENDMENT OF THE 1990 STOCK OPTION PLAN TO INCREASE THE 
   NUMBER OF SHARES THAT MAY BE ISSUED BY 750,000 SHARES.

                     FOR       AGAINST     ABSTAIN 
                     / /         / /         / /   



Signature(s) __________________________________________ Dated ___________, 19__



Note: (Please sign exactly as your name appears hereon indicating your 
official title when signing in a representative capacity.)




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