PROMISSORY NOTE
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$50,000                                                          JUNE 3, 2002

For valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the undersigned Daniel Benjamin, a Delaware corporation
("Promissor"), promises to pay to the order of Daniel Benjamin, LP ("Lender"),
in lawful money of the United States of America the principal amount of Fifty
Thousand Dollars and No Cents ($50,000.00 U.S.), together with no interest, at
the times and in the manner provided herein.

1.    PAYMENT OF PRINCIPAL.  The principal shall be paid as follows:

      a. The principal, and all fees, charges, and other amounts owing hereunder
and then  unpaid  shall be due and  payable on  January  3, 2003 (the  "Maturity
Date").

      b.  Promissor  shall pay all amounts owing under this Note in  immediately
available  funds to Lender at Lender's  address as set forth herein,  or at such
other place as may be specified in writing by Lender.  Each payment,  when made,
shall be credited  first to the  principal  then due,  and then at the option of
Lender to late  charges,  and other fees and expenses  outstanding  hereunder in
such order as Lender may  determine.  Payments  received  after 1:00 p.m. on any
banking day or at any time on any Saturday,  Sunday,  or holiday shall be deemed
received on the next banking day.

2.    COLLATERAL AS SECURITY.  This Note is secured by certain  collateral  (the
"Collateral"),  which encumbers,  among other things, the interest of in certain
assets, as more particularly described in the Collateral Pledge Agreement.  This
Note and the Collateral  Pledge Agreement of even date herewith,  between Lender
and Pledgor of even date herewith,  and any other documents or instruments given
or to be given to Lender to secure the  indebtedness  evidenced by this Note are
collectively  referred to herein as the "Loan  Documents".  The Company under no
circumstances  will cancel the stock being held as Collateral unless required to
do so by a state or federal regulatory body.

3.    INTEREST RATE UPON DEFAULT. Should Promissor fail to  pay any amount owing
hereunder as and when due,  whether the same is due regularly as scheduled or by
reason of  acceleration  following  default or otherwise,  then  interest  shall
accrue on the past due amount at the rate of ten (10%).  Such interest  shall be
due and  payable  upon the  earlier  of demand or the first day of the  calendar
month following the month in which the same shall have accrued.

4.    DEFAULT;  REMEDIES. Each of the following occurrences and conditions shall
constitute an Event of Default:

      a.  failure  of  Promissor  to pay as and  when  due  any  money,  whether
principal  or  otherwise,  under  this  Note,  or the  breach or  default of any
obligation to pay money under or secured by the Stock Pledge Agreement; or

      b. failure of Promissor to perform any obligation other than an obligation
to pay money, as and when  performance of such obligation is due under this Note
or Loan  Documents  which  failure  continues for fifteen (15) days after notice
thereof from Lender to Promissor; or

      c.  failure by  Promissor  to comply  with any of the  terms,  provisions,
covenants,  conditions or restrictions now or hereafter affecting the Collateral
or any part thereof or contained in any  agreement  related or pertaining to the
Collateral,  which failure  continues for fifteen (15) days after notice thereof
from Lender to Promissor; or

      d.  Promissor's  making  or at any time  having  made any  representation,
warranty or disclosure to Lender that is or was  materially  false or misleading
on the date as of which made,  whether or not that  representation or disclosure
appears in the Loan Documents; or

      e. the sale, transfer,  conveyance,  or lease of all or any portion of the
Collateral  or of  any  of  Promissor's  rights  therein,  whether  voluntarily,
involuntarily, or otherwise, or Promissor's entering into an agreement to do any
of the foregoing, in each case except as expressly permitted in the Stock Pledge
Agreement; or

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At any time following the  occurrence of any Event of Default,  or following the
occurrence  of any event as a  consequence  of which the  obligations  evidenced
hereby may be  accelerated,  then at the election of Lender and  notwithstanding
anything to the contrary  herein or  elsewhere,  the entire  amount of principal
then outstanding under this Note and all fees, charges,  and other amounts owing
and then unpaid hereunder shall become  immediately due and payable,  and Lender
may  exercise any and all rights that it may have under the Loan  Documents,  at
law, in equity, and otherwise.  In the event of a default on the Promissory Note
where (a) the stock is sold  pursuant to the Stock Pledge  Agreements by MRC and
Valdetaro  and (b) the proceeds of these sales of stock are is  insufficient  to
cover the principle  and any interest  then owed pursuant to the Note,  Vertical
acknowledges and agrees that it will be liable for any then outstanding amounts.

5.    ATTORNEYS'  FEES.  Promissor shall pay to Lender upon demand all costs and
expenses  incurred by Lender in connection with  determination,  protection,  or
enforcement of any and all of Lender's rights hereunder or under any of the Loan
Documents,  including  enforcement  of any  and  all  obligations  of  Promissor
hereunder and  thereunder  and  protection,  enhancement,  or maintenance of the
security  interests  securing such obligations or the priority of the same. Such
costs and expenses shall be payable  whether or not any suit is instituted,  and
the same shall include without limitation  attorneys' fees, expert witness fees,
costs of  investigation,  and all of such costs incurred in connection  with any
trial, appellate proceeding,  or any case or proceeding under Chapters 7, 11, or
13 of the Bankruptcy Code or any successor thereto.

6.    WAIVER OF NOTICE.  Promissor  and each  endorser,  guarantor and surety of
this Note hereby waive  diligence,  demand,  presentment for payment,  notice of
discharge, notice of nonpayment, protest and notice of protest, and specifically
consent to and waive notice of any renewals or extensions of this Note,  whether
made to or in favor of Promissor or any other person or persons.  Promissor  and
each endorser,  guarantor and surety of this Note further waive and renounce all
rights  to the  benefits  of all  statutes  of  limitation  and any  moratorium,
appraisement,  by any federal exception and homestead now or hereafter  provided
or state law or statute,  including but not limited to exemptions provided by or
allowed under the Bankruptcy Code, both as to each of themselves  personally and
as to all of their property,  whether real or personal,  against the enforcement
and  collection  of the  obligations  evidenced  by  this  Note  and any and all
extensions, renewals and modifications thereof.

7.    NOTICES.  All notices required  hereunder or pertaining hereto shall be in
writing  and shall be deemed  delivered  and  effective  upon the earlier of (i)
actual  receipt,  or (ii) the date of  delivery or refusal of the  addressee  to
accept  delivery  if such  notice is sent by express  courier  service or United
States mail, postage prepaid, certified or registered, return receipt requested,
in either case to the applicable address as follows:

To Lender:        Daniel Benjamin
                  1644 Bears Den Road
                  Diamond Bar, California  91765


To Promissor:     Vertical Computer Systems, Inc.
                  6336 Wilshire Boulevard
                  Los Angeles, CA 90048
                  Attn: President

Notwithstanding  the  foregoing,  any  notice  under or  pertaining  to the Loan
Documents or the  obligations  secured thereby given and effective in accordance
with  applicable  law shall be effective for purposes  hereof.  Either party may
change  the  address  at which it is to  receive  notices  hereunder  to another
business  address within the United States (but not a post office box or similar
mail  receptacle)  by giving  notice of such  change of  address  in  accordance
herewith.


9.    EXERCISE OF RIGHTS. No single or partial exercise of any of Lenders rights
or powers under this Note or any of the other Loan Documents  shall preclude any
other or further  exercise  thereof or the exercise of any other right or power.
Lender at all times  shall have the right to proceed  against any portion of the
security  which secures  payment of the  indebtedness  evidenced  hereby in such
order and manner as Lender may elect without  waiving any rights with respect to
any other portion of such  security.  Each and all rights and remedies of Lender
hereunder and under the Loan  Documents are  cumulative  and in addition to each

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and all other such rights and remedies. No exercise of any right or remedy shall
preclude exercise of any other right or remedy.

10.   NO WAIVER.  No failure of Lender to insist upon strict  performance of any
obligation  of Promissor  or to exercise any right or remedy  hereunder or under
the Loan  Documents,  whether before or after any default,  shall  constitute or
give rise to a waiver thereof,  and no waiver of any default shall  constitute a
waiver of any future default or of any other  default.  No failure to accelerate
the debt evidenced  hereby by reason of default  hereunder or otherwise,  and no
acceptance  of any past due payment  hereunder or  acceptance of any amount less
than the amount then due, and no other  indulgence that may be granted by Lender
from time to time shall (a)  preclude  the exercise of any right that Lender may
have at law, in equity, by contract or agreement or otherwise, or (b) constitute
or give rise to (i) a waiver of such right of  acceleration  or any other right,
or (ii) a novation of this Note or a reinstatement of the debt evidenced hereby,
or (iii) any waiver of Lender's rights to demand and receive from Promissor full
and  prompt  payment  and  performance   thereafter,   to  impose  late  charges
retroactively,  or to declare a default. Promissor and each endorser, guarantor,
and surety of this Note  hereby  expressly  waive the  benefit of any statute or
rule of law or equity which would produce any result contrary to or otherwise in
conflict with any of the foregoing.

11.   ASSIGNMENT;  SUCCESSORS  AND  ASSIGNS.  Lender  may  assign  or  otherwise
transfer  all or any part of its interest  herein.  Promptly  following  written
notice of such assignment or other transfer, duly executed by Lender,  Promissor
shall  render full and  complete  performance  hereunder  as and when due to the
transferee so designated by Lender.  Promissor  shall not assign or transfer all
or any of its interests or obligations hereunder, and any attempted or purported
assignment  or  transfer by  Promissor  shall be void and of no force or effect,
except to the extent that the same may be  expressly  permitted  under the Stock
Pledge Agreements.  Subject to the foregoing, the terms of this Note shall apply
to, be binding  upon,  and inure to the benefit of ail parties  hereto and their
successors and assigns.

12.   MODIFICATION.  This Note shall not be modified,  amended,  or  terminated,
except by written  agreement  duly  executed  and  delivered  by both Lender and
Promissor.

13.   CONFLICTS. In the event of any conflict between any provision of this Note
and  any  provision  of the  Stock  Pledge  Agreements,  which  conflict  cannot
reasonably be resolved in such a way as to give effect to all provisions  herein
and therein contained, this Note shall govern.

14.   SEVERABILITY.  If any  provision of this Note or any payments  pursuant to
the terms hereof shall be invalid or unenforceable to any extent,  the remainder
of this Note and any other payments  hereunder shall not be affected thereby and
shall be enforceable to the greatest extent permitted by law.

15.   GOVERNING  LAW. This Note shall be governed by and construed in accordance
with the laws of the State of California.

      IN WITNESS  WHEREOF,  Promissor has executed and delivered this Note as of
the date first written above.

                                    VERTICAL COMPUTER SYSTEMS, INC.



                                    By __________________________
                                          Richard Wade, President

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