Exhibit 10.13

                        [Letterhead of Celerity Systems]

                                                           3/31/93

                               Letter of Agreement

Celerity Systems, Inc. is hereby contracted by Herzog, Heine, and Geduld, Inc.
to develop the Back Office System Proposal of January 21, 1993.

The overall scope of the project is provided in the aforementioned proposal. The
first step of the project will provide detailed specifications of the project.

A timeline will be developed as a part of the first step, which will show the
chronology of the steps and related deliverables. Each step of the overall
project will be considered complete upon approval of Herzog, Heine, and Geduld.

/s/ Mahmoud Youssefi                    /s/ Herzog, Heine, and Geduld, Inc.
- --------------------                    -----------------------------------
Mahmoud Youssefi                        Herzog, Heine, and Geduld, Inc
Managing Director
Celerity Systems, Inc.


                              DEVELOPMENT AGREEMENT

                                TABLE OF CONTENTS

                                                                            PAGE
                                                                            ----
1.0    DEFINITIONS..........................................................  1
2.0    STATEMENT OF WORK....................................................  3
3.0    MAINTENANCE SERVICES.................................................  3
4.0    OWNERSHIP OF MATERIALS...............................................  4
5.0    PRICE AND PAYMENT....................................................  4
6.0    ACCEPTANCE...........................................................  5
7.0    CHANGES..............................................................  7
8.0    COPYRIGHT............................................................  8
9.0    WARRANTY.............................................................  8
10.0   INDEMNIFICATION......................................................  9
11.0   TERM AND TERMINATION................................................. 10
12.0   CONFIDENTIAL INFORMATION............................................. 11
13.0   COMPLIANCE WITH LAWS................................................. 12
14.0   GENERAL.............................................................. 12

                                   ATTACHMENTS

       Attachment I -- REQUIREMENTS ANALYSIS
       Attachment II -- SCHEDULE
       Attachment III -- DOCUMENTATION
       Attachment IV -- MAINTENANCE AGREEMENT


                         SOFTWARE-DEVELOPMENT AGREEMENT


This Development Agreement (hereinafter "Agreement") is made effective as of the
____ day of ______________, ____, by and between Celerity Systems, Inc.,
incorporated under the laws of the State of Tennessee, U.S.A., having an office
for the transaction of business at 9051 Executive Park Drive, Knoxville,
Tennessee 37923 (hereinafter referred to as "CSI"), and Herzog Heine Geduld,
Inc., organized under the laws of the State of __________, having an office for
the transaction of business at _________________ (hereinafter referred to as
"Herzog").

1.0   DEFINITIONS

      The definitions set forth in this Section shall apply to the following
      capitalized words and terms when used in this Agreement.

      1.1   "Code" shall mean that computer program code, in source, object and
            load executable form, licensed to Herzog, and more fully described
            in Attachment III, and Support thereof, and any additional computer
            program code provided by CSI to Herzog hereunder. Code shall include
            newly created sounds and visuals, including screens music and
            characters, displayed or heard as a result of the execution of the
            Code.

      1.2   "Documentation" shall mean written materials itemized in Attachment
            III, and Support thereof, furnished hereunder to Herzog by CSI.

      1.3   "Derivative Work" shall mean a work which is based upon one or more
            preexisting work(s), such as a revision, modification, translation,
            abridgement, condensation, expansion, collection, compilation or any
            other form in which such preexisting works may be recast,
            transformed or adapted, and which, if prepared without authorization
            by the owner of the preexisting work, would constitute a copyright
            infringement.

      1.4   "Error" shall mean any one or more of the following conditions:

            (a)   a function described in Attachment I which is omitted from the
                  Code; or

            (b)   a function of the Code which does not operate or gives
                  incorrect results; or

            (c)   a function or user interface in the Code which does not
                  operate satisfactorily in the environment for which it was
                  designed; or

            (d)   a failure of the Documentation to accurately describe a
                  function contained in Attachment III; or

            (e)   a failure of the Documentation to enable the intended user to
                  correctly operate Code.


      1.5   "Maintenance" shall mean modifications, revisions or additions which
            provide Error corrections for Code or Documentation.

      1.6   "Modifications" shall mean modifications, revisions or additions
            made to the Code or Documentation other than Maintenance.

      1.7   "Work" shall mean the goods, products, services, supplies,
            performance, documents, software, data, drawings or other items
            constituting the subject matter of this Agreement which are
            furnished by CSI to Herzog.

      1.8   "Object Code" shall mean the machine-readable form of computer
            program code.

      1.9   "Source Code" shall mean the human-readable form of computer program
            code and related system documentation, including all comments and
            any procedural code such as job control language.

      1.10  "Subsidiary" shall mean a corporation, company or other entity: 1)
            more than (50%) of whose outstanding shares or securities
            (representing the right, other than as affected by events or
            default, to vote for the election of directors or other managing
            authority) are; or 2) which does not have outstanding shares or
            securities, as may be the case in a partnership, joint venture or
            unincorporated association, but more than (50%) of the ownership
            interest representing the right to make the decisions for such
            corporation, company or other entity is; now or hereafter, owned or
            controlled, directly or indirectly, by a party hereto; but such
            corporation, company or other entity shall be deemed to be a
            Subsidiary only so long as such ownership or control exists.

2.0   STATEMENT OF WORK

      CSI agrees to perform the Work set forth in this Section, only pursuant to
      Herzog Purchase Orders issued hereunder for the compensation specified in
      Section 5.0.

      CSI shall design, develop, code, integrate and test the Code in accordance
      with the specifications of the approved Requirements Analysis.

      CSI shall deliver one (1) copy of the Object Code and Source Code of the
      Code to Herzog for Herzog's testing and approval.

      CSI shall deliver Documentation as set forth in Attachment III in
      preliminary form sufficient for Herzog's verification of the Code design,
      and then in final form after Herzog's approval. Such information shall be
      in a format suitable for Herzog's preparation of an End User's Manual.

      CSI shall provide technical assistance to Herzog during Code verification
      testing. CSI shall debug the Code as required in order to pass these
      tests, and revise the design documentation accordingly.


                                       2


      Within ten (10) days of Herzog's request, and at no additional charge, CSI
      shall deliver to Herzog such data necessary to maintain and operate the
      Code delivered hereunder or to conduct further development efforts with
      respect to the Code.

      CSI shall integrate and test additional specific software, as indicated in
      Attachment I, along with the Code.

3.0   MAINTENANCE SERVICES

      3.1   CSI agrees to maintain the ability to provide Maintenance to Herzog,
            and agrees to provide such Maintenance at terms, conditions and
            prices substantially as set forth in Attachment V. Herzog is under
            no obligation to utilize or purchase such Maintenance from CSI.

4.0   OWNERSHIP OF MATERIALS

      4.1   All Code and Documentation delivered to Herzog hereunder, shall
            belong exclusively to CSI.

      4.2   CSI hereby grants Herzog an irrevocable, nonexclusive, royalty-free,
            paid-up license to use, execute, reproduce, display, distribute
            internally and prepare Derivative Works of the Code and
            Documentation.

5.0   PRICE AND PAYMENT

      5.1   Price

            Subject to the terms and conditions of this Agreement, and in
            consideration for the rights and licenses granted to Herzog herein,
            Herzog will pay to CSI the fixed price of Two Hundred Twenty-Five
            Thousand Dollars ($210,000.00).

      5.2   Payment

            Without limiting the obligation of CSI to comply with all the
            requirements of this Agreement, CSI will submit invoices and Herzog
            will pay for Work completed according to this Agreement on the
            following schedule:

            DATE             DESCRIPTION                AMOUNT          PERCENT
            ----             -----------                ------          -------
            6/13/93      Requirements Analysis         $ 15,000           7.14%
            7/19/93      LAN/HUB 3270                  $ 35,000          16.67
                         Connectivity
            8/26/93      Phase 1 Prototype               45,000          21.43
            9/20/93      Phase 1 Completion              55,000          26.19
           12/16/93      Phase 2                       $ 60,000          28.57
                                                       --------         ------ 
                         Total                         $210,000         100.00%
                                                       ========         ====== 


                                       3


      All payments are exclusive of any tariffs, duties, or taxes imposed or
      levied by any government or governmental agency. Herzog shall be
      responsible for payment of all such taxes, however designated, levied, or
      based upon Herzog's possession or use of the Code and the Documentation,
      or in this Agreement, including without limitation, state or local sales,
      use and personal property taxes.

      5.3   Herzog shall reimburse CSI for actual and reasonable travel and
            living expenses incurred by CSI employees while performing Work at
            Herzog facilities. Such Work shall be authorized by Herzog prior to
            CSI incurring any expenses. CSI shall invoice such authorized travel
            and living expenses at cost. Copies of all receipts shall accompany
            any invoice submitted to Herzog.

      5.4   Herzog shall pay to CSI the applicable amount within fifteen (15)
            days net after receipt of an invoice in which CSI has certified that
            the Work that is the subject of the invoice has been completed in
            accordance with the requirements of this Agreement, and that all
            conditions established by this Agreement as prerequisite to payment
            of the invoice have been fulfilled.

6.0   ACCEPTANCE

      6.1   CSI shall deliver to Herzog the Code and Documentation in accordance
            with the schedule in Attachment II. Herzog will promptly notify CSI
            of any Errors which it identifies prior to final delivery.

            CSI shall promptly correct all Errors so identified by Herzog prior
            to CSI's final delivery of the Code and Documentation.

      6.2   After final delivery of all installments of the Code and
            Documentation, Herzog may perform evaluation and test for a period
            of thirty (30) days after receipt (hereinafter called "Evaluation
            Period"). During the Evaluation Period, Herzog shall promptly notify
            CSI of Errors identified by Herzog. CSI shall promptly correct all
            Errors and deliver the corrected items to Herzog.

      6.3   Within ten (10) days after the end of the Evaluation Period, CSI
            shall provide to Herzog corrections for all Errors found during the
            Evaluation Period and/or a statement identifying those Errors CSI
            has been unable to correct, together with a schedule for delivering
            the corrected items to Herzog.

      6.4   Herzog shall furnish written notice to CSI within thirty (30) days
            after receipt of the corrected Code and Documentation of acceptance
            or rejection. Herzog may reject the Code and Documentation, if any
            one or more Errors are not corrected and CSI's schedule for
            correcting Errors is unacceptable to Herzog; Herzog may treat such
            rejection as a material breach by CSI and terminate this Agreement
            in accordance with the Section entitled "TERM AND TERMINATION."


                                       4


      6.5   CSI recognizes that Herzog relies on CSI to fully test and correct
            all Errors in the Code and Documentation. Accordingly, should Herzog
            elect to accept the Code and Documentation with any one or more
            System Critical Error(s), Herzog may withhold all payment due upon
            or after their acceptance, as provided in the Section entitled
            "PRICE AND PAYMENT" until all such Error(s) are corrected. Should
            Herzog elect to accept the Code and Documentation with any one or
            more Conditional Error(s), Herzog may withhold forty percent (40%)
            of any such payments until all such Error(s) are corrected.

            "Error Severity Level" as used herein shall mean classifications of
            Errors as assigned by Herzog according to the following definitions:

            (a)   "System Critical Error" shall mean an emergency condition
                  which causes critical impact or significantly affects a Herzog
                  schedule or which makes the performance or continued
                  performance of any one or more functions difficult or
                  impossible.

            (b)   "Conditional Error" shall mean a condition which is not
                  critical in that no loss of data occurs and which may be
                  circumvented or avoided on a temporary basis by the intended
                  user.

      6.6   If no written notice of acceptance or rejection is furnished to CSI
            by Herzog within the time period set forth in Subsection 6.4, CSI
            shall provide Herzog with written notice stating that if Herzog does
            not accept or reject within five (5) days after Herzog's receipt of
            such notice, Herzog shall be deemed to have accepted the Code and
            Documentation. Herzog's failure to accept or reject within five (5)
            days after receipt of such notice shall be deemed to be acceptance.

      6.7   If any one (1) item is rejected by Herzog pursuant to this Section,
            Herzog may, at its option, reject all items regardless of whether or
            not any of those items were previously accepted by Herzog.

7.0   CHANGES

      7.1   Herzog may, by written change order, make reasonable changes within
            the general scope of this Agreement in drawings, designs,
            specifications, procedures, quantities, or time or place of
            delivery; require additional Work; or direct the omission of Work
            and CSI shall promptly proceed with the change(s). All change orders
            will be specifically identified as a change order to this Agreement
            and will be signed by the Herzog Contract Administrator. If any such
            change causes an increase or decrease in the cost of, or the time
            required for performance of the Work, an equitable adjustment shall
            be made in the price(s), or delivery date(s), or both; and this
            Agreement shall be amended in writing accordingly. Any claim for
            adjustment by CSI shall be deemed waived unless asserted in writing
            within ten (10) days from the date of receipt by CSI of the Herzog
            written change order. The amount of claim shall be stated when it is
            submitted.


                                       5


      7.2   If CSI or Herzog claims a right to adjustment pursuant to this
            Section, CSI shall prepare and furnish to Herzog the evidence
            necessary to establish the amount of any increase or decrease in the
            cost of, or the time required for, Work affected by the change
            order. The amount of any cost increase or decrease shall be
            determined in accordance with CSI's regularly established accounting
            practices and shall, if requested by Herzog, be verified by an
            independent Certified Public Accounting firm.

      7.3   Herzog technical personnel may from time to time render technical
            assistance or give advice to, or effect an exchange of information
            with CSI personnel concerning the Work to be furnished hereunder.
            Such advice, assistance or exchange of information shall not be
            deemed to be a change order requiring deviation from the Work
            described in this Agreement, unless submitted to CSI in writing
            pursuant to Subsection 7.1.

8.0   COPYRIGHT

      All Code, Documentation, or Derivative Works thereof, developed or
      produced by CSI shall contain an appropriate copyright notice in the name
      of CSI, or other author in a manner to be determined by CSI.

9.0   WARRANTY

      CSI represents and warrants to Herzog that the Code shall be fit for its
      intended use, conforming to the Documentation and Requirements Analysis
      attached to this Agreement and:

      9.1   that CSI shall endeavor to eliminate Errors in the Code and
            Documentation, but CSI does not warrant that these items shall be
            delivered to Herzog Error free; and

      9.2   that if within a period of six (6) months from the date of
            installation, Herzog notifies CSI of any Error in the Code or
            Documentation, CSI agrees to use its best efforts to correct the
            Error(s) on a timely basis at no charge to Herzog. Herzog agrees to
            use proper skill and care to follow the fault-finding procedures
            specified by CSI and will cooperate with CSI in diagnosing the
            Error; and

      9.3   that CSI is or will be the author of, or has or will have exclusive
            right, title and interest (including the right to grant licenses and
            other rights granted herein) in the Code and Documentation; and

      9.4   that to the best of CSI's knowledge, the Code and Documentation do
            not infringe any copyright or other non-patent intellectual property
            right (including trade secret), privacy or similar right, of any
            third party; and

      9.5   that to the best of its knowledge no claim, whether or not embodied
            in any action past or present, of infringement of any copyright,
            patent, or other intellectual property right, privacy or similar
            right, has been made or is pending against CSI relative to the Code


                                       6


            or Documentation. Each party shall promptly notify the other in the
            event it becomes aware of such a claim.

      The warranties contained in this Section are in lieu of all other
      warranties express or implied, including, but not limited to the implied
      warranties of merchantability and fitness for a particular purpose.

10.0  INDEMNIFICATION

      10.1  CSI agrees to protect, defend, hold harmless and indemnify Herzog
            and/or Herzog Subsidiaries from and against any and all suits,
            claims, losses and the like, arising out of any alleged or actual:

            (a)   infringement by Code or Documentation of a patent, copyright,
                  trademark, trade name, product name, or other intellectual
                  property right, privacy or similar right of any third party in
                  any country of the world;

            (b)   breach of CSI's warranties under this Agreement;

            (c)   damage to property, personal injury, death, resulting or
                  claimed to result, in whole or in part, from any actual or
                  alleged defect(s) in the Code or Documentation;

            (d)   failure of CSI to comply with any governmental law, statute,
                  ordinance, administrative order, rule or regulation including
                  those related to unfair competition.

      10.2  CSI shall pay all damages, expenses and costs, including but not
            limited to, attorneys' fees, resulting from such suits, claims,
            losses and the like against Herzog and/or Herzog Subsidiaries,
            provided that either Herzog and/or Herzog Subsidiaries:

            (a)   notify CSI in writing of any such claim, suit, loss or the
                  like;

            (b)   cooperate with CSI, at CSI's expense, in defending such claim,
                  suit, loss or the like;

            (c)   allow CSI to control the litigation; and

            (d)   obtain CSI's prior written approval of any settlement, which
                  approval CSI agrees not to unreasonably withhold.

      10.3  Notwithstanding the foregoing, CSI shall have no obligation to
            defend Herzog and/or Herzog Subsidiaries, or to pay costs, damages,
            or attorneys' fees for any infringement claim based upon the
            combination, operation, or use of the Code or Documentation, with
            programs or data not supplied by CSI if such infringement would have
            been avoided but for the combination, operation, or use of the Code
            or Documentation with other programs or data.


                                       7


      10.4  If any suits, claims, losses or the like arise and require
            indemnification under this Section, CSI may, at its own expense,
            either procure the right for Herzog and/or Herzog Subsidiaries, to
            continue using the Code and Documentation, trademarks, trade names
            or product names, or replace or modify the same so they become
            non-infringing without impairment of function.

11.0  TERM AND TERMINATION

      11.1  This Agreement shall be effective upon execution by both parties and
            shall have full force and effect for the term of performance of the
            Work required hereunder and any extension thereof.

      11.2  CSI shall have the right to terminate this Agreement at any time in
            the event of a material breach by Herzog of its obligations under
            this Agreement. Termination shall be made by written notice to
            Herzog and shall be specific, and become effective ninety (90) days
            after the giving of such notice, unless Herzog shall have corrected
            the breach.

      11.3  Herzog shall have the right to terminate this Agreement, in whole or
            in part, without cause, at any time prior to Herzog's acceptance of
            the Code and Documentation. In the event of termination pursuant to
            this Subsection, Herzog's sole liability shall be to pay CSI one
            hundred percent (100%) of its actual, reasonable and verifiable
            expenses incurred prior to the effective date of termination, and
            one hundred percent (100%) of its actual, reasonable and verifiable
            costs associated with close-out of the Work for a period of time not
            to exceed thirty (30) calendar days after notice of termination. Any
            Herzog payment hereunder shall be less the amount already paid to
            CSI by Herzog under this Agreement; provided, however, that in no
            event shall such amount exceed the total amount payable by Herzog in
            accordance with the Section entitled "PRICE AND PAYMENT." CSI agrees
            to take steps to minimize termination costs for Work terminated
            hereunder, to the extent reasonable and practical, including, prompt
            discontinuation of Work and prompt cancellation of purchased
            services and material.

      11.4  In the event of any expiration or termination of this Agreement:

            (a)   the representations, rights, warranties and obligations in the
                  Sections entitled "OWNERSHIP OF MATERIALS," "COPYRIGHT,"
                  "WARRANTY," "INDEMNIFICATION," "CONFIDENTIAL INFORMATION," AND
                  "GENERAL" shall survive and continue and shall bind the
                  parties and their legal representatives, successors and
                  assigns; and

            (b)   Herzog and/or its Subsidiaries shall have no obligation to
                  return to CSI any copies of the Code, Documentation or
                  Derivative Works thereof then in the possession of Herzog
                  and/or its Subsidiaries, or any sublicensee or purchaser; and

            (c)   CSI shall deliver to Herzog, copies of Code and Documentation,
                  developed as of the effective date of termination, whether
                  completed or in progress, and Herzog


                                       8


                  shall have a paid-up license to such Code and Documentation as
                  provided in paragraph 4.3 of the Section entitled "OWNERSHIP
                  OF MATERIALS."

12.0  CONFIDENTIAL INFORMATION

      12.1  Confidential information disclosed to CSI by Herzog hereunder is
            subject to the terms of the Confidential Disclosure Agreement dated
            ___________ between the parties.

      12.2  Confidential information disclosed to Herzog by CSI hereunder is
            subject to the terms of the Confidential Disclosure Agreement dated
            ___________ between the parties.

13.0  COMPLIANCE WITH LAWS

      Both parties agree to comply and do all things necessary to enable the
      other party to comply with all applicable federal, state and local laws,
      regulations and ordinances including but not limited to the regulations of
      the United States Government as they relate to this Agreement and the
      services provided hereunder.

14.0  GENERAL

      14.1  CSI and Herzog shall participate at Herzog's request in monthly
            meetings, prior to acceptance by Herzog of the Code and
            Documentation, to review the status of Work performed under this
            Agreement. Such meetings shall be held at Herzog and CSI facilities.
            Herzog will reimburse CSI's travel and related expenses to attend
            such meetings as it may schedule.

      14.2  Nothing contained herein shall be deemed to authorize or empower
            either party to act as agent for the other party or to conduct
            business in the name of the other party. No agency, partnership,
            joint venture or other joint relationship is created by this
            Agreement.

      14.3  Neither party shall be liable to the other for any lost revenue,
            lost profits, special, indirect, incidental, consequential, or
            punitive damages, even if advised of the possibility of such
            damages, by reason of any performance or non-performance under this
            Agreement. The responsibilities of both parties for any delays,
            losses or other damages which may result from the furnishing of
            equipment, programs, publications, information, or services under
            this Agreement shall be limited to the remedies specified in this
            Agreement.

      14.4  Each party's liability to the other arising out of the claims
            arising from breach of contract shall not exceed the total value of
            this Agreement.

      14.5  Disputes arising under this Agreement shall be referred immediately
            to, and settled by, binding arbitration. The arbitration panel shall
            consist of three persons. Each of the parties hereto shall appoint
            one arbitrator and two arbitrators thereby appointed shall elect a
            third arbitrator. The arbitration shall be conducted in New York
            City in


                                       9


            accordance with the rules of the American Arbitration Association.
            The costs of arbitration shall be borne equally by CSI and Herzog.
            Judgment upon the award rendered may be entered in any Court having
            jurisdiction thereof.

      14.6  Except as expressly provided herein, Herzog may in its sole
            discretion assign any of its rights hereunder to a Subsidiary. The
            rights and privileges of Herzog under this Agreement shall also
            inure to the benefit of any successor in interest to Herzog by
            acquisition or merger. Otherwise, neither party shall sell,
            transfer, assign or subcontract any right or obligation hereunder,
            without the prior written consent of the other party. Any act in
            derogation of the foregoing shall be null and avoid.

      14.7  CSI may use the services of consultants or other third parties who
            are not employees of CSI in the performance of this Agreement.

      14.8  CSI will have an appropriate agreement with each of its employees or
            others whose services CSI may require sufficient to enable it to
            comply with all of the terms of this Agreement.

      14.9  CSI, all subcontractors of CSI, and their employees, agents or
            servants shall not be considered to be employees, agents or servants
            of Herzog, and they will in no way represent themselves as agents,
            servants or employees of Herzog.

      14.10 CSI shall maintain comprehensive general liability insurance for
            claims for damages because of bodily injury (inclusive of death) and
            property damage caused by, or arising out of, acts or omissions of
            its employees. The minimum limits of such insurance shall be three
            hundred thousand dollars ($300,000.00) for each individual; and five
            hundred thousand dollars ($500,000.00) for each accident because of
            bodily injury, and one million dollars ($1,000,000.00) because of
            property damage for each accident. Certificates of such insurance
            shall be furnished to Herzog at the commencement of this Agreement
            and at the renewal date of such insurance policy until this
            Agreement is terminated or has expired, whichever occurs first. In
            no event shall insurance be canceled during such period without
            thirty (30) days prior written notice to Herzog.

      14.11 Any notice required or permitted to be made or given to either party
            hereto pursuant to this Agreement shall be sufficiently made or
            given on the date of mailing, if sent to such party by certified
            mail, postage prepaid, addressed to it at its address set forth
            below, or to such other address as it shall designate by written
            notice given to the other party:

                For Herzog:                               For CSI:
            Herzog Heine Geduld, Inc.              Celerity Systems, Inc.
            26 Broadway                            9051 Executive Park Drive
            New York, New York 10004               Knoxville, TN 37923
            Attn: Andrew DaPonte                   Attn: Mahmoud Youssefi


                                       10


      14.12 CSI shall promptly provide Herzog written notification of, including
            a description of, the impending and/or actual occurrence of any of
            the following events:

            (a)   Changes in the assignment of key employees working on the Code
                  and Documentation

            (b)   Changes in the designated place(s) of performance of the Work
                  contemplated by this Agreement

            (c)   Insolvency proceedings

            (d)   Labor disputes involving employees of CSI or other parties
                  which may adversely affect CSI's performance under this
                  Agreement.

            (e)   Any other factor or event which may detrimentally affect CSI's
                  ability to meet the requirements of this Agreement.

      14.13 Neither party hereto shall be in default by reason of any failure in
            the performance of this Agreement in accordance with its terms if
            such failure is due to acts of God or of the public enemy, acts of
            the government in either its sovereign or contractual capacity,
            fires, floods, epidemics, quarantine restrictions, freight
            embargoes, or for unavailability of transportation of materials or
            similar reasons beyond such party's control.

      14.14 No amendment or modification of any provision of this Agreement
            shall be effective unless it is in a document which refers to this
            Agreement and is signed by both parties. No waiver of any provision
            of this Agreement will be effective unless it is in writing signed
            by the party waiving its rights hereunder. No failure or delay by
            either party in exercising any right, power or remedy under this
            Agreement, except as specifically provided herein, will operate as a
            waiver of any such right, power or remedy.

      14.15 If any provision or provisions of this Agreement shall be held to be
            illegal, invalid or unenforceable, the validity, legality and
            enforceability of the remaining provisions shall not in any way be
            affected or impaired thereby.

      14.16 The headings of the Sections are inserted for convenience and
            reference only and are not intended to be part of or to affect the
            meaning or interpretation of this Agreement.

      14.17 In the event of any ambiguity and/or inconsistency in this
            Agreement, the ambiguity and/or inconsistency shall be resolved by
            giving precedence in the following order:

                    1. Terms and Conditions of this Agreement
                    2. Attachments I through V to this Agreement
                    3. Purchase Orders issued hereunder.


                                       11


      14.18 This Agreement is deemed to be made under and shall be construed in
            accordance with the laws of the State of Tennessee and constitutes
            the entire understanding between the parties hereto with respect to
            the subject matter of this Agreement.

      14.19 This Agreement supersedes all previous communications,
            representations, and understandings between the parties with respect
            to the subject matter of this Agreement.


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IN WITNESS WHEREOF, the parties have caused this Agreement to be executed by
their duly authorized representations.

HERZOG HEINE GEDULD, INC.                   CELERITY SYSTEMS, INC.


By:                                         By:
   ---------------------------------           ---------------------------------

Title:                                      Title:
      ------------------------------              ------------------------------

Date:                                       Date:
     -------------------------------             -------------------------------


                                       13


                                  ATTACHMENT I

                              REQUIREMENTS ANALYSIS


                                       14


                                  ATTACHMENT II

                                    SCHEDULE

CSI and Herzog agree that the Work called for under this Agreement shall be
completed in accordance with the following schedule:

MILESTONE                          DESCRIPTION                      DATE
- ---------                          -----------                      ----

                              [ATTACH GANNT CHART]


                                       15


                                 ATTACHMENT III

                                  DOCUMENTATION

Open Fiche User Manual

Open Fiche Administrator's Manual

Herzog Heine Geduld Back Office
        System Configuration Manual


                                       16


                                  ATTACHMENT IV

                             CELERITY SYSTEMS, INC.
                       AGREEMENT FOR MAINTENANCE SERVICES

This Agreement is entered into effective the ____ day of ___________________,
1993, by and between Celerity Systems, Inc., a Tennessee corporation with its
principal place of business at 9051 Executive Park Drive, Knoxville, Tennessee
37923 (hereinafter "CSI"), and ___________, a ___________ corporation with its
principal place of business in ________________ (hereinafter "Customer").

            1. Definitions. As used in this Agreement, the listed terms are
      defined as follows:

                  a. "Regular Business Hours" shall mean from 8:00 a.m. to 4:00
      p.m. Monday through Friday, except for the following holidays:

                     New Years Day
                     Memorial Day
                     Independence Day
                     Labor Day
                     Thanksgiving Day
                     Day After Thanksgiving
                     Christmas Day

                  b. "Covered Software" shall mean all CSI software covered by
      Full Service Program maintenance under this Agreement. A listing of
      covered software is attached on Exhibit A to this Agreement.

                  c. "Full Service Program" maintenance shall provide phone
      contact and problem isolation within four (4) regular business hours of a
      customer service request, and for a system critical malfunction shall
      provide CSI technical personnel on-site at the Customer location if
      necessary within eight (8) regular business hours, and shall provide an
      operational solution to the service request in no more than sixteen (16)
      regular business hours; for other than system critical service requests,
      CSI service personnel shall appear on-site if necessary within twenty-four
      (24) regular business hours, and shall resolve the service request in no
      more than forty (40) regular business hours.

                  d. "Systems Integration" maintenance shall provide Full
      Service Program maintenance for any of Customers hardware and/or software
      installed by CSI. Systems Integration maintenance is optional and must be
      designated on Exhibit C. Systems Integration maintenance does not preclude
      the Customer from obtaining maintenance from other sources, and third
      party maintenance programs may be required by some vendors.


                                       17


                  e. "System Critical" malfunctions shall mean conditions which
      significantly affect a Customer schedule or which makes the performance or
      continued performance of any one or more functions of the Covered Software
      impossible.

            2. Maintenance Service.

                  a. During the term of this Agreement, CSI agrees to provide
      Customer with the following maintenance services and materials:

                        (i)   Full Service Program maintenance for the Covered
                              Software;

                        (ii)  updates and improvements to Customer's version of
                              the Covered Software including new releases, when
                              and if developed;

                        (iii) written, telephone, and on-site consultations
                              reasonably necessary to resolve or correct any
                              errors in the software; and

                        (iv)  reasonable efforts to remedy deficiencies in the
                              Covered Software.

      However, Customer agrees that maintenance service does not require CSI to
      correct any and every perceived deficiency Customer may identify with the
      Covered Software.

                  b. The Maintenance Service provided in subpart a. does not
      include the following:

                        (i)   the addition of new functionality which Customer
                              may wish to add to the Covered Software;

                        (ii)  maintenance and support of any software which has
                              been modified without CSI's written permission.

                  c. If elected by Customer, CSI will also provide Systems
      Integration maintenance for the entire hardware and software system, or
      any designated subsystem, installed by CSI and designated in Exhibit C.
      Systems Integration maintenance is provided on a time and materials basis
      with a minimum quarterly retainer. Charges for time are first billed
      against the quarterly retainer. Charges for materials, travel expense and
      other out-of-pocket costs are billed in addition to the quarterly
      retainer.

                        Systems Integration maintenance is a cooperative
      maintenance plan focused on providing timely service and answer to all
      questions related to all systems hardware and software whether purchased
      directly from CSI or from third party vendors and integrated by CSI. Under
      Systems Integration maintenance, CSI will:

                  o     Provide unlimited phone support either with Customer or
                        with the manufacture of the product in question.


                                       18


                  o     Stay current on the present version and future versions
                        of the products listed in Exhibit C. On certain
                        occasions when the product in use is no longer the best
                        option, CSI will also be required to make
                        recommendations on other as yet specified products.

                  o     Supervise the installation of upgrades or "fixes" as the
                        case may be of the listed products.

                  o     Provide on-site support under the following schedule of
                        costs set forth on Exhibit B.

                  o     Upon request of Customer, write simple work orders
                        detailing any features Customer may wish to add to the
                        system. The work order will identify the objective,
                        approach, and cost of the addition.

            3. Pricing Changes. Rates as set forth in Exhibits A and B will be
fixed for the first twelve (12) months of this maintenance Agreement.
Thereafter, if CSI finds it necessary to revise the rates on Exhibits A or B for
the services provided herein, CSI will provide Customer with written notice
thereof at least sixty (60) days prior to the effective date for such revised
rates. In the event that the revised rates are not acceptable to Customer,
Customer may terminate this contract and receive a full pro rata refund of any
payments for future services.

            4. Payment Terms.

                  a. CSI shall invoice Customer quarterly, in advance, for
      maintenance charges, and monthly for any other charges payable to CSI
      under this Agreement. Such invoices shall itemize charges by dates that
      service was provided and shall be due net fifteen (15) days from the date
      of invoice.

                  b. Customer shall be responsible for the payment of any
      federal, state or local tax, other than a tax on net income now or
      hereafter in effect, which is or becomes applicable to any payment due
      under this Agreement.

            5. Term. This Agreement shall commence on the date stated on the
face of this Agreement and shall continue for an initial term of three (3)
years. Thereafter, the Agreement shall renew automatically for successive
one-year terms unless either party shall give written notice of intent not to
renew at least sixty (60) days in advance of the current term.

            6. Termination. In the event either party shall neglect or fail to
perform any of its obligations under this Agreement, the other party shall have
the right to institute the following resolution or termination procedure:

                  a. The aggrieved or concerned party shall provide written
      notice of its grievance or concerns to the other;


                                       19


                  b. A meeting shall be scheduled within two (2) weeks of such
      written notice between the Customer's information services manager and the
      CSI manager of customer service in an attempt to reach resolution;

                  c. If no resolution is reached, the aggrieved party may
      terminate this Agreement in its sole discretion upon thirty (30) days'
      written notice.

                  d. In the event of termination, Customer's sole liability
      shall be to pay CSI all maintenance charges and any other charges payable
      under this Agreement which have accrued through the effective date of
      termination. CSI's sole liability shall be to refund any maintenance or
      other charges paid in advance, as of the effective date of termination.

            7. Limitation of Liability.

                  a. CSI shall indemnify and hold harmless Customer, its
      divisions and subsidiaries, agents, representatives and employees from and
      defend at CSI's expense against every claim, damage, loss, liability and
      suit (including interest, reasonable attorneys' fees and cost), arising
      out of any injury (including death) to persons and damage to tangible
      property caused or alleged to have been caused by any breach of warranty
      or by negligent acts or omissions of CSI.

                  b. CSI's liability for actual damages from any cause
      whatsoever will be limited to the greater of 1) $40,000 or 2) an amount
      equal to twelve (12) months' maintenance charges for the individual
      software that caused the damage or that is the subject matter of, or is
      directly related to, the cause of action. Such charges will be those in
      effect for such software when the cause of action arose. This limitation
      will apply, except as otherwise stated in this Section, regardless of the
      form of action, whether in contract or in tort including negligence. This
      limitation will not apply to claims by or against Customer for bodily
      injury or damage to real property or tangible personal property for which
      CSI is legally liable, or to a claim for infringement of any U.S. patent,
      copyright, or other intellectual property right.

                  c. Customer agrees that CSI will not be liable for any
      special, incidental, indirect, or consequential damages hereunder,
      including the loss of data or information of any kind and loss of profits.

            8. Confidentiality. CSI acknowledges that in the course of providing
services under this Agreement, its employees and agents may be exposed to
confidential information of Customer. CSI will implement reasonable security and
confidentiality procedures to see that no such confidential information is
disclosed or misused by its employees and agents. In the event of the expiration
or termination of this Agreement, the obligations of this paragraph shall
continue and bind CSI and its legal representatives, successors and assigns.

            9. Notices. Any notice required or permitted to be made or given to
either party hereto pursuant to this Agreement shall be sufficiently made or
given on the date of mailing, if sent to such party by certified mail, postage
prepaid, addressed to the address set forth below, or to such other address as
shall be designated by written notice provided to the other party:


                                       20


For Customer:                           For CSI:

_______________________________         Customer Service Manager       
_______________________________         Celerity Systems, Inc.         
_______________________________         9051 Executive Park Drive      
_______________________________         Knoxville, Tennessee 37923     
                                        Attn: ______________________   

            10. Governing Law. This Agreement will be construed in accordance
with the laws of the State of Tennessee, U.S.A.

            11. Disputes. Disputes arising under this Agreement shall be
referred immediately to, and settled by, binding arbitration. The arbitration
panel shall consist of three persons. Each of the parties hereto shall appoint
one arbitrator and two arbitrators thereby appointed shall elect a third
arbitrator. The arbitration shall be conducted in a city and place mutually
agreed to by the parties (or, if there is no agreement, by the arbitration
panel) in accordance with the rules of the American Arbitration Association. The
costs of arbitration shall be borne jointly by CSI and Customer. Judgment upon
the award rendered may be entered in any Court having jurisdiction thereof.

            12. Force Majeure. Neither party hereto shall be in default by
reason of any failure in the performance of this Agreement in accordance with
its terms if such failure is due to acts of God or of the public enemy, acts of
the government in either its sovereign or contractual capacity, fires, floods,
epidemics, quarantine restrictions, freight embargoes, or similar reasons beyond
such party's control.

            13. Severable. If any provision or provisions of this Agreement
shall be held to be illegal, invalid or unenforceable, the validity, legality
and enforceability of the remaining provisions shall not in any way be affected
or impaired thereby.

            14. Amendments in Writing. No amendment or modification of any
provision of this Agreement shall be effective unless it is in a document which
refers to this Agreement and is signed by both parties. No waiver of any
provision of this Agreement will be effective unless it is in writing signed by
the party waiving its rights hereunder. No failure or delay by either party in
exercising any right, power or remedy under this Agreement, except as
specifically provided herein, will operate as a waiver of any such right, power
or remedy.

            15. No Agency. Nothing contained herein shall be deemed to authorize
or empower either party to act as agent for the other party or to conduct
business in the name of the other and CSI, subcontractors of CSI, and their
employees, agents or servants shall not be considered to be employees, agents or
servants of Customer and they will in no way represent themselves as agents,
servants or employees of Customer.

            16. Compliance with Laws. Both parties agree to comply and do all
things necessary to enable the other party to comply with all applicable
federal, state and local laws, regulations and


                                       21


ordinances including but not limited to the regulations of the United States
Government as they relate to this Agreement and the services provided hereunder.


                                    CELERITY SYSTEMS, INC.


                                    BY:
                                        ---------------------------------

                                    ITS:
                                        ---------------------------------


                                    [CUSTOMER]


                                    BY:
                                        ---------------------------------

                                    ITS:
                                        ---------------------------------


                                       22


                                                                       EXHIBIT A

                                                             ANNUAL
COVERED CSI SOFTWARE                LIST PRICE             MAINTENANCE
- --------------------                ----------             -----------
Open Fiche                          $40,995.00             $ 4,099.50
Automatic Report Download            21,000.00               2,100.00
Jukebox Software                     40,000.00               4,000.00
                                                           ----------
                                                           $10,199.50
                                                           ==========

Full Service Maintenance for Covered Software:

      $2,549.88 per quarter


                                                                       EXHIBIT B

Systems Integration Maintenance for Software
and Hardware on Exhibit C:

Retainer $2,500.00 per quarter.

Labor rates (1 hour minimum) --   $125.00 per hour plus travel charges of $75.00
                                  per hour, if necessary.

Labor charges each quarter will first be offset against the retainer, and in the
event CSI's labor charges should exceed the retainer amount, CSI will bill
Customer for the excess.

Any travel expenses, materials or other out-of-pocket expenses will be billed
monthly in addition to the quarterly retainer.


                                                                       EXHIBIT C


Hardware and/or Software Covered by Systems
Integration Maintenance

      The Herzog Heine Geduld back office system as described in the Back Office
      System Requirements Analysis of May 27, 1993


                                    CELERITY SYSTEMS, INC.


                                    BY:
                                        ---------------------------------

                                    ITS:
                                        ---------------------------------


                                    [CUSTOMER]


                                    BY:
                                        ---------------------------------

                                    ITS:
                                        ---------------------------------