Robocom Systems International Inc.                                  Exhibit 10.7

                                 PROMISSORY NOTE

US$ 58,020                                                  Massapequa, New York
                                                                    May 30, 2002

      FOR VALUE RECEIVED, the undersigned maker, ROBOCOM SYSTEMS INTERNATIONAL
INC., a New York corporation (the "Borrower"), hereby unconditionally promises
to pay to order of Irwin Balaban, an individual residing at 17 Fairbanks Blvd.,
Woodbury, NY 11797 (the "Lender"), the outstanding principal amount of
Fifty-eight Thousand Twenty Dollars ($58,020), in same day funds in a single
installment on May 30, 2004 (the "Maturity Date").

      Interest shall accrue on the unpaid principal amount of this Note from the
date of this Note until such principal amount is paid in full at the per annum
rate equal to 3.0%. Interest shall be calculated on the basis of a 360-day year
for the actual number of days elapsed and shall be paid on the Maturity Date.

      Whenever any payment on this Note shall be stated to be due on a day which
is not a business day, such payment shall be made on the next succeeding
business day and such extension of time shall be included in the computation of
the payment of interest on this Note.

      Each payment received by the Lender shall be applied first, against all
costs and expenses of the Lender incurred in connection with this Note, second,
against accrued and unpaid interest on the outstanding principal balance of this
Note, and third, the balance of each such payment shall be applied against the
principal hereof.

      If at any time (i) there occurs a default in the payment by the Borrower
of principal or interest pursuant to this Note, (ii) the Borrower is dissolved,
becomes insolvent under any law, suspends its present business, or agrees to a
merger, bulk sale or transfer of all or substantially all of its assets, (iii)
the Borrower commences or has commenced against it any bankruptcy or insolvency
proceeding or has a trustee or receiver appointed for it or its assets, or (iv)
there occurs a default in the performance of any other obligation of the
Borrower under this Note, (collectively, a "Default"), the Lender shall give
written notice thereof to the Borrower; provided, however, that, upon the
occurrence of an event specified in clauses (i), (ii) or (iii) above, no notice
shall be required. Immediately upon the occurrence of an event specified in
clauses (i), (ii) or (iii) above, or immediately upon the Lender giving the
Borrower notice regarding the occurrence of an event specified in clause (iv)
above, the Lender shall be entitled to retain any and all payments previously
made pursuant to this Note and all amounts owing pursuant to this Note shall
immediately become due and payable.

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      All rights and remedies of the Lender under applicable law and this Note
are cumulative and not exclusive. No single, partial or delayed exercise by the
Lender of any right or remedy shall preclude full and timely exercise by the
Lender at any time of any right or remedy of the Lender without notice. No
waiver shall be effective unless made specifically in writing by the Lender.

      The Borrower promises to pay all costs and expenses, including all
reasonable attorneys' fees and disbursements, incurred in the preparation,
administration, collection and enforcement of this Note. The Borrower hereby
waives diligence, presentment, protest, demand and notice of every kind and, to
the fullest extent permitted by law, the right to plead any statute of
limitations as a defense to any demand hereunder. The non-exercise by the Lender
of any of its rights under this Note in any particular instance shall not
constitute a waiver hereof in that or any subsequent instance.

      This Note may not be changed or terminated orally. This Note shall bind
the successors and assigns of the undersigned and shall enure to the benefit of
the Lender and his heirs, legal representatives, successors and assigns.

      Each provision of this Note shall survive until all amounts due are paid
to Lender's satisfaction and are not subject to any preference period, shall be
interpreted as consistent with existing law and shall be deemed amended to the
extent necessary to comply with any conflicting law. If a court deems any
provision invalid, the remainder of this Note shall remain in effect. Singular
number includes plural and neuter gender includes masculine and feminine as
appropriate.

      This Note shall be governed by, and construed an interpreted in accordance
with, the laws of the State of New York, without regard to its conflicts of law
provisions.

      IN WITNESS WHEREOF, the Borrower has caused this Note to be executed and
delivered as of the day and year and at the place first above written.

                              ROBOCOM SYSTEMS INTERNATIONAL INC.


                              By: /s/ Irwin Balaban
                                  ------------------------------------------
                                  Name:  Irwin Balaban
                                  Title: President & Chief Executive Officer