Document:

Orin Hirschman
                              6006 Berkeley Avenue
                            Baltimore, Maryland 21209

                                January 29, 2004

GraphOn Corporation
105 Cochrane Circle, Suite L
Morgan Hill, California 95037
Attention:  Chief Executive Officer
Fax Number:  (408) 776-8448

Greetings:

           1. This letter sets forth the terms of our agreement (the
"Agreement") concerning the compensation of Orin Hirschman ("Hirschman") for
services from time to time on a non-exclusive basis to GraphOn Corporation or
any of its direct or indirect affiliates ("GraphOn") in connection with the
introduction of GraphOn to any potential acquisitions (of assets or of or by
companies), strategic partners, merger partners or investors, or any direct or
indirect affiliate thereof (the "Targets"). GraphOn hereby agrees that in the
event a Transaction (as defined below) is consummated with or through a Target
introduced by Hirschman, GraphOn shall pay to Hirschman compensation (the
"Compensation") consisting of cash equal to 5% of the Value. A "Transaction"
shall mean any of various transactions in which a Target may be involved,
including, but not limited to, financings, acquisitions, mergers, joint
ventures, significant licenses and other business combinations or transactions,
but not including transactions in the ordinary course of GraphOn's business.
"Value" shall mean the aggregate purchase price or other consideration paid to
or by a Target or person introduced by the Target (each a "Transaction Partner")
in any Transaction including without limitation (i) the amount of any cash or
cash equivalents, (ii) the fair market value of any stock or the stated
principal amount of any securities issued by GraphOn or the Transaction Partner,
(iii) the stated principal amount of any debt issued or assumed by GraphOn or
the Transaction Partner in connection with the Transaction, (iv) the fair market
value of any non-competition, employment, consulting or similar arrangements
entered into in connection with the Transaction to the extent the compensation
provided therein exceeds reasonable compensation for services actually provided,
(v) the fair market value of any commission, licensing, royalty or similar
arrangements accruing as a result of a Transaction and (vi) the fair market
value of any other property exchanged by GraphOn and the Transaction Partner in
connection with the Transaction. The fair market value shall be determined in
good faith by the Board of Directors of GraphOn.

           2. The Compensation shall be paid at the time GraphOn closes any
Transaction, except that any portion of Compensation due in respect of
installments or contingent payments of Value shall be paid to Hirschman upon
receipt of such installment or contingent payment.

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           3. This Agreement shall be effective on the date hereof and shall
expire on the third anniversary of the date hereof. Notwithstanding anything
herein to the contrary, if GraphOn shall, within such period or within180 days
immediately following the termination of the three-year period provided above,
pay any consideration to, receive any consideration from, or consummate any
Transaction(s) with or through, any Transaction Partner, GraphOn shall also pay
Hirschman Compensation as determined above.

           4. Hirschman shall be permitted full and complete access during
normal business hours and with reasonable prior notice to GraphOn to all books
and records of GraphOn necessary to permit Hirschman to audit or verify the
accuracy of any Compensation. Hirschman shall be responsible for any and all
costs of such verification or audit and for review of any determination of fair
market value, unless such verification, audit or review reveals that GraphOn has
underpaid Hirschman by two percent or more for any applicable determination, in
which case GraphOn shall reimburse Hirschman for all reasonable costs incurred
in connection with such verification, audit or review (including fees and costs
of independent accountants). In the event GraphOn disputes such verification,
audit or review, GraphOn shall retain a valuation expert to audit or verify the
accuracy of any Compensation and shall be responsible for any and all costs of
such expert. If Hirschman disagrees with such expert's verification, audit or
review, such expert and Hirschman shall designate a third, mutually acceptable
independent expert to audit or verify the accuracy of any Compensation, and the
determination of such third expert shall be binding on all parties. GraphOn and
Hirschman shall each be responsible for fifty-percent of the costs of such third
expert. GraphOn shall pay to Hirschman all amounts that are determined to be
payable to Hirschman after such verification, audit or review within five (5)
days after the completion of such verification, audit or review. In addition,
GraphOn shall bear any costs of collection (including reasonable legal fees) of
Compensation and such fees.

           5. Neither any advice rendered by Hirschman nor any communication
from Hirschman in connection with the services performed by Hirschman pursuant
to this Agreement will be quoted, in whole or in part, nor will any such advice
or communication or the name of Hirschman be referred to, in any report,
document release or other communication, whether written or oral, prepared,
issued or transmitted by GraphOn or any officer, director, stockholder,
employee, agent or representative of GraphOn without the prior written
authorization of Hirschman.

           6. (a) GraphOn agrees to indemnify and hold harmless Hirschman, his
employees, legal counsel, agents and affiliates, (all of such persons being
hereinafter collectively referred to as the "Indemnified Parties") against any
and all losses, claims, damages, obligations, penalties, judgments, awards,
liabilities, costs, expenses and disbursements (and any and all actions, suits,
proceedings and investigations in respect thereof and any and all legal and
other costs, expenses and disbursements reasonably incurred in giving testimony
or furnishing documents in response to a subpoena or otherwise), including,
without limitation, the reasonable costs, expenses and disbursements, as and
when incurred, of investigating, preparing or defending any such action, suit,
proceeding or investigation (whether or not in connection with litigation in
which an Indemnified Party is a party), directly or indirectly caused by,
relating to, based upon, arising out of or in connection with (i) Hirschman's
acting for GraphOn, including, without limitation, any act or omission by an
Indemnified Party in connection with acceptance of or the performance or

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nonperformance of obligations under this Agreement, as it may be amended from
time to time; (ii) any untrue statement or alleged untrue statement of material
fact contained in, or omissions or alleged omissions from, any information
furnished to an Indemnified Party, an investor, lender, provider of funding to
GraphOn or any party to a Transaction; or (iii) any Transaction, provided,
however, the foregoing indemnity shall not apply to any portion of any such
loss, claim, damage, obligation, penalty, judgment, award, liability, cost,
expense or disbursement to the extent it is found in a final judgment by a court
of competent jurisdiction (not subject to further appeal) to have resulted
primarily and directly from the willful misconduct or gross negligence of the
particular Indemnified Party. GraphOn also agrees that an Indemnified Party
shall not have any liability (whether direct or indirect, in contract or tort or
otherwise) to GraphOn or to any person claiming through GraphOn for or in
connection with the engagement of Hirschman, except to the extent that any such
liability is found in a final judgment by a court of competent jurisdiction (not
subject to further appeal) to have resulted primarily and directly from
Hirschman's willful misconduct or gross negligence.

      (b) The indemnity provisions of this Section 6 shall be in addition to any
liability GraphOn may otherwise have to any of the Indemnified Parties.

      (c) If any action, suit, proceeding or investigation is commenced, as to
 which an Indemnified Party proposes to demand indemnification, such Indemnified
 Party shall notify GraphOn with reasonable promptness; provided, however, that
 any failure by an Indemnified Party to notify GraphOn shall not relieve GraphOn
 from its obligations hereunder. Each Indemnified Party shall have the right to
 retain counsel of his or its own choice to represent him or it, and GraphOn
 shall pay the fees, expenses and disbursements of such counsel; and such
 counsel shall to the extent consistent with its professional responsibilities
 cooperate with GraphOn and any counsel designated by GraphOn. GraphOn shall be
 liable for any settlement of any claim against an Indemnified Party made with
 GraphOn 's written consent, which consent shall not be unreasonably withheld.
 GraphOn shall not, without the prior written consent of an Indemnified Party,
 settle or compromise any claim, or permit a default or consent to the entry of
 any judgment in respect thereof, unless such settlement, compromise or consent
 includes, as an unconditional term thereof, the giving by the claimant to the
 respective Indemnified Party of an unconditional release from all liability in
 respect of such claim.

      (d) In order to provide for just and equitable contribution, if a claim
 for indemnification pursuant to these indemnification provisions is made but it
 is found in a final judgment by a court of competent jurisdiction (not subject
 to further appeal) that such indemnification may not be enforced in such case,
 even though the express provisions hereof provide for indemnification in such
 case, then GraphOn, on the one hand, and the respective Indemnified Party or
 Indemnified Parties, as applicable on the other hand, shall contribute to the
 losses, claims, damages, obligations, penalties, judgments, awards,
 liabilities, costs, expenses and disbursements to which the indemnified persons
 may be subject in accordance with the relative benefits received by GraphOn, on
 the one hand, and the respective Indemnified Party or Indemnified Parties, as
 applicable on the other hand, and also the relative fault of GraphOn, on the
 one hand, and the respective Indemnified Party or Indemnified Parties, as
 applicable on the other hand, in connection with the statements, acts or
 omissions which resulted in such losses, claims, damages, obligations,
 penalties, judgments, awards, liabilities, costs, expenses and disbursements

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 and the relative equitable considerations shall also be considered. No person
 found liable for a fraudulent misrepresentation shall be entitled to
 contribution from any person who is not also found liable for such fraudulent
 misrepresentation. Notwithstanding the foregoing, the respective Indemnified
 Party or Indemnified Parties, as applicable, shall not be obligated to
 contribute any amount hereunder that exceeds the amount of fees previously
 received by the respective Indemnified Party or Indemnified Parties, as
 applicable, in connection with the foregoing.

      (e) Neither termination nor completion of the engagement of Hirschman
 pursuant to the Agreement shall affect the provisions of this Section 6, which
 shall remain operative and in full force and effect.

           7. Upon completion of a Transaction, GraphOn shall pay or reimburse
Hirschman's reasonable expenses incurred in connection with performance of his
services hereunder, including without limitation travel expenses and the
reasonable fees and expenses of his outside counsel and experts; provided that
Hirschman will obtain GraphOn's prior approval before incurring expenses in
excess of $2,000 in the aggregate for a single project for travel or retaining
experts or counsel.

           8. Neither GraphOn nor Hirschman shall make any public statement
 about this Agreement or any transactions or services described herein
 mentioning the other party without the prior written consent of the other
 party, unless that party determines in good faith, on the advice of legal
 counsel, that public disclosure is required by law, in which case that party
 shall consult with the other party prior to making a statement.

           9. GraphOn represents and warrants to Hirschman that Hirschman's
 engagement hereunder has been duly authorized and approved by GraphOn, and that
 this Agreement has been duly executed and delivered by GraphOn and constitutes
 a legal, valid and binding obligation of GraphOn. Hirschman shall not be under
 any legal obligation to introduce a Transaction. GraphOn shall not be under any
 legal obligation to accept any Transaction initiated by Hirschman and it may
 refuse, in its sole discretion, for any reason or for no reason whatsoever, to
 accept or close any such Transaction.

           10. The parties hereto acknowledge and agree that Hirschman is not
 acting as an agent or a fiduciary of GraphOn or its stockholders in connection
 with any services that may be performed hereunder.

           11. Any advice rendered by Hirschman hereunder is solely for the
 benefit of GraphOn 's board of directors and may not be relied upon by any
 other person.

           12. This Agreement has been executed and delivered in the State of
 New York and shall be governed by the laws of such state, without giving effect
 to the conflict of laws rules thereunder. Each party hereby irrevocably
 consents and submits to the jurisdiction of any New York State or United States
 Federal Court sitting in the State of New York, County of New York, over any
 action or proceeding arising out of or relating to this Agreement and
 irrevocably consents to the service of any and all process in any such action

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 or proceeding by registered mail addressed to such party at his or its address
 set forth above (or as otherwise noticed to the other party). Each party
 further waives any objection to venue in New York and any objection to an
 action or proceeding in such state and county on the basis of forum non
 conveniens. Each party also waives any right to trial by jury.

           13. This Agreement shall be binding upon, and enforceable against,
 the successors and assigns of each of the undersigned; provided that this
 Agreement may not be assigned by Hirschman. Notwithstanding the foregoing,
 Hirschman may assign a portion of his Compensation as he determines in his sole
 discretion.

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

           Please signify your agreement to the foregoing at the place indicated
below.

                                   Cordially,

                               /s/ Orin Hirschman
                               ------------------
                                 Orin Hirschman

Agreed to and accepted:

GRAPHON CORPORATION

By:  /s/ Robert Dilworth
     -------------------Execution Copy

                             REIMBURSEMENT AGREEMENT

      This REIMBURSEMENT AGREEMENT (this "Agreement") is made as of December 10,
2004 by and between AIGH Investment Partners, LLC, a Delaware limited liability
company having a mailing address at 6006 Berkeley Ave., Baltimore, MD 21209
("AIGH"), and GraphOn Corporation, a Delaware corporation ("GraphOn").

                                    RECITALS

           WHEREAS, in connection with the proposed acquisition of Network
Engineering Software, Inc., a California corporation ("NES") by GraphOn (the
"Acquisition"), NES has requested assistance, and GraphOn has agreed to assist,
in the settlement (the "Settlement") of claims (the "Sprinkel Claims") against
NES and certain of its affiliates by Nicholas Sprinkel and Crystal Bay Capital,
LLC (together, "Sprinkel");

           WHEREAS, to assist GraphOn with the Settlement, Orin Hirschman
("Hirschman"), an affiliate of AIGH, has agreed to make available the necessary
funds, in an amount equal to $665,000 (such amount, or such lesser amount as is
actually paid by Hirschman or AIGH with respect to the Settlement, the "Payment
Amount"), to ensure payment of the Sprinkel Claims, and has transferred his
rights in respect to the Payment Amount to AIGH;

           WHEREAS, pursuant to each of (i) the Agreement and Plan of Merger and
Reorganization of equivalent date hereof by and among GraphOn, NES and the other
parties thereto governing the Acquisition (the "Acquisition Agreement") and (ii)
the Settlement Agreement and Release of equivalent date hereof by and among
Sprinkel, NES, GraphOn, and Ralph Wesinger (the "Settlement Agreement"),
Sprinkel is entitled to obtain satisfaction in full of the Sprinkel Claims on
the earlier to occur of the closing date under the Acquisition Agreement and
December 10, 2004 (the "Payment Date") regardless of whether the Acquisition
proceeds (unless prior to the Payment Date the Acquisition Agreement has been
terminated);

            WHEREAS, the parties hereto wish to enter into this Agreement in
order to set forth GraphOn's obligations to reimburse AIGH with respect to the
Payment Amount in the limited circumstances, and on the terms, set out in this
Agreement;

            WHEREAS, GraphOn has determined that it is in its and its
shareholders' best interest to undertake the Reimbursement Obligation (as
defined below) in order to facilitate the Acquisition in a timely manner by
permitting AIGH to provide the Payment Amount and thus facilitate the
Settlement, and

            WHEREAS, AIGH has determined that the Acquisition is in its best
interest because of its indirect interest through affiliates as a significant
shareholder of GraphOn.

<PAGE>

                                    AGREEMENT

      In consideration of AIGH's providing the Payment Amount to facilitate the
Settlement, AIGH and GraphOn hereby agree as follows:

1. Reimbursement. GraphOn will incur an obligation to AIGH equal to the sum of
(i) the Payment Amount, as delivered in accordance with the terms of the
Settlement Agreement, plus (ii) all expenses, commissions and other fees of any
sort relating to this Agreement that have been previously paid or are to become
payable thereafter by AIGH (computed from the date hereof at the same rate paid
or payable by AIGH) to Sprinkel in connection with the Settlement (collectively,
the "Reimbursement Obligation"), and will satisfy such Reimbursement Obligation
in full within five (5) business days of receipt by GraphOn of written notice
thereof from AIGH; provided, however, GraphOn shall only be required to pay the
Reimbursement Obligation to AIGH at such time that all of the following shall
have occurred: (1) the Acquisition has been consummated in accordance with the
terms of the Acquisition Agreement, (2) the PIPE Financing (as defined below)
shall have closed and provided GraphOn with gross proceeds to GraphOn of not
less than $3,240,000; and (3) AIGH shall have duly and validly assigned to
GraphOn all of its rights under (i) that certain Reimbursement and Intellectual
Property Collateral Security Agreement, dated as of December 3, 2004, by and
between Hirschman and NES (the "NES IP Security Agreement") and (ii) that
certain Stock Pledge Agreement, dated as of December 3, 2004, by and between
Hirschman and Ralph Wesinger (the "Wesinger Stock Pledge Agreement").

2. Conversion. In satisfaction of any Reimbursement Obligation, GraphOn, at its
option (or at AIGH's option in the event the non-recourse provisions of Section
6 hereof apply), shall deliver, in lieu of cash, such number of Units
(collectively, the "Reimbursement Units"), each Unit consisting of (a) one share
of GraphOn's Series A Preferred Stock and (b) one five-year warrant exercisable
to purchase 1/2 share of GraphOn's Series B Preferred Stock, that is equal to:
(x) the aggregate amount of the Reimbursement Obligation in U.S. dollars,
divided by (b) $27.00 on the terms set forth in a Unit Subscription Agreement to
be entered into by and between GraphOn, AIGH and certain other investors (or
such other price per Unit as is mutually agreed to between GraphOn and AIGH and
such other investors in connection with that certain Private Placement of Common
Stock and Warrants by GraphOn to AIGH and other investors pursuant to the
Acquisition (such transaction, the "PIPE Financing")).

3. Obligations Absolute. The Reimbursement Obligation shall be unqualified,
irrevocable and payable in the manner and method provided for under this
Agreement irrespective of any one or more of the following circumstances: (i)
any lack of validity or enforceability of this Agreement, the Acquisition
Agreement, the Settlement Agreement or any amendment relating thereto, (ii) any
change in the time, manner or place of payment of or in any other term of all or
any of the Reimbursement Obligation of GraphOn, and (iii) the existence of any
claim by AIGH against Sprinkel.

4. Indemnification. GraphOn will indemnify and hold AIGH and Hirschman, and
their respective employees, attorneys and agents, (each, "an Indemnified Party")
harmless from and against any and all claims, liabilities, losses, damages,
costs and expenses including without limitation, reasonable attorneys' fees and

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disbursements, other dispute resolution expenses (including fees and expenses in
preparation for a defense of, any investigation, litigation or proceeding) and
costs of collection that arise out of or in connection with or by reason of
AIGH's enforcement of its rights under this Agreement, except to the extent such
claim, liability, loss, damage, cost or expense is found in a final,
non-appealable judgment by a court of competent jurisdiction to have resulted
from any Indemnified Party's gross negligence, willful default or willful
misconduct. GraphOn will pay on demand from time to time all amounts owing under
this section.

5. Events of Default. Each of the following shall be an "Event of Default" under
this Agreement: (a) GraphOn's failure to pay the Reimbursement Obligation within
ten (10) days of the due date therefor, (b) GraphOn's failure to perform or
observe any other term or covenant of this Agreement in any material respect,
(c) GraphOn's dissolution or termination, (d) any voluntary action by GraphOn
for the institution of any proceeding under any law relating to bankruptcy,
insolvency or reorganization or relief of debtors or seeking the appointment of
a receiver, trustee, or other similar official for GraphOn or for any
substantial part of its property, or the same actions being taken against
GraphOn involuntarily to the extent not dismissed or stayed within 30 days, (e)
attachment or restraint of all or substantially all of GraphOn's assets, or the
issuance of any order of any court or other legal process against the same,
which is not dismissed or stayed within 30 days.

6. Enforcement on Non-Recourse Basis. If any Event of Default shall have
occurred, any Reimbursement Obligation, to the extent then owing to AIGH, shall
become immediately due and payable, provided, notwithstanding any other
provision of this Agreement, AIGH's only recourse against GraphOn in the event
any Reimbursement Obligation is accelerated as a result of an Event of Default
shall be to require GraphOn to deliver the Reimbursement Units pursuant to
Section 2 hereof, and GraphOn shall not be personally liable therefor, nor shall
any of GraphOn's property or assets, other than the Reimbursement Units, be
subject to garnishment, attachment or other process for the enforcement of
judgments or the collection of debts.

7. Entire Agreement. This Agreement constitutes the entire understanding between
GraphOn and AIGH related to AIGH's payment of Settlement amounts and the
Reimbursement Obligation. This Agreement may be amended only by a writing signed
by each of the parties hereto. Hirschman shall be a third party beneficiary of
this Agreement.

8. WAIVER OF JURY TRIAL. BOTH GRAPHON AND AIGH, AFTER CONSULTING OR HAVING HAD
THE OPPORTUNITY TO CONSULT WITH COUNSEL, KNOWINGLY, VOLUNTARILY AND
INTENTIONALLY WAIVE ANY RIGHT EITHER GRAPHON OR AIGH MAY HAVE TO A TRIAL BY JURY
IN ANY LITIGATION BASED ON OR ARISING OUT OF THIS AGREEMENT, THE PAYMENT OF THE
PAYMENT AMOUNT BY AIGH, ANY OF THE TRANSACTIONS CONTEMPLATED BY THIS AGREEMENT,
OR ANY COURSE OF CONDUCT, DEALING, STATEMENTS (WHETHER ORAL OR WRITTEN), OR
ACTIONS OF EITHER GRAPHON OR AIGH. NEITHER GRAPHON NOR AIGH SHALL SEEK TO
CONSOLIDATE, BY COUNTERCLAIM OR OTHERWISE, ANY ACTION IN WHICH A JURY TRIAL HAS
BEEN WAIVED WITH ANY OTHER ACTION IN WHICH A JURY TRIAL CANNOT BE OR HAS NOT
BEEN WAIVED. THESE PROVISIONS SHALL NOT BE DEEMED TO HAVE BEEN MODIFIED IN ANY

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RESPECT OR RELINQUISHED BY ANY EITHER GRAPHON OR AIGH EXCEPT BY A WRITTEN
INSTRUMENT EXECUTED BY BOTH.

9. Governing Law and Jurisdiction. This Agreement shall be governed by and
construed under the laws of the state of California, to the jurisdiction of
which the parties hereto submit. Any litigation shall be brought exclusively in
Santa Clara County, California and the parties hereby submit and consent to the
personal jurisdiction and venue of courts located there. The invalidity or
unenforceability of one provision under a particular circumstance shall not
affect the validity or enforceability of that provision under other
circumstances or of other provisions under any circumstance and such provision
shall automatically be reformed so as to give the maximum effect possible to its
intent under such circumstance. This Agreement shall be binding upon the
successors and assigns of the parties provided that GraphOn may not assign its
rights or obligations under this Agreement, whether by operation of law or
otherwise, without the prior written consent of AIGH.

10. Termination; Surviving Provisions. This Agreement shall be terminated only
upon payment in full to AIGH of all of the Reimbursement Obligation. Restrictive
provisions in this Agreement, such as indemnity, tax, and jurisdiction
provisions shall survive termination of this Agreement.

           [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

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IN WITNESS WHEREOF, the undersigned have executed this Agreement as of the date
first above written.

                                    GRAPHON CORPORATION
                                    3130 Winkle Ave.
                                    Santa Cruz, Ca. 95065

                                    By: /s/ Robert Dilworth
                                        ---------------------------

                                          Name:
                                          Robert Dilworth
                                          Title:
                                          Chairman and CEO

                                    AIGH INVESTMENT PARTNERS, LLC
                                    6006 Berkeley Avenue
                                    Baltimore, MD 21209

                                    By: /s/ Orin Hirschman
                                        ---------------------------

                                          Name:
                                          Orin Hirschman
                                          Title:
                                          Authorized signatory

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