OFFICE SUBLEASE AGREEMENT



               THIS AGREEMENT OF LEASE, made this 12th day of June, 1996,
          by and between Comtex Scientific Corporation hereinafter referred
          to as "Sub-Lessor", and Hadron, Inc.  hereinafter referred to as
          "Sub-Lessee".


                                 W I T N E S S E T H

               PREMISES 1.01  --  In consideration of the rent hereinafter
          reserved and of the covenants hereinafter continued, Sub-Lessor
          does hereby sublease to the Sub-Lessee, and Sub-Lessee hereby
          leases from Sub-Lessor part of the building known as Suite 800 on
          the eighth floor of 4900 Seminary Road, Alexandria, Virginia
          22311, which space is hereinafter referred to as the premises and
          is outlined in red on "Exhibit A to Sublease" attached hereto and
          made a part hereof (sometimes referred to herein as the "sublease
          premises"), reserving; however, to Landlord space for all
          necessary pipes and wires leading to and from the portions of the
          Building not hereby leased, which will not unreasonably interfere
          with Sub-Lessee's use of the premises.  The mutually agreed-upon
          floor area of the sublease premises is conclusively deemed to
          have an area of 660 square feet.

               TERM 2.01 --   (a)  The term of the Sublease shall commence
          on the 1st day of May, 1996, and shall terminate on 30 April,
          1997.
                         (b)  If the Sub-Lessee wants to extend the
          sublease for another 12 month period, a written request must be
          submitted to Sub-Lessor no later than 60 days prior to the end of
          the current lease period and the Sub-Lessor must respond to this
          request within 5 business days.
                         (c)  Both parties have the option to terminate
          this sublease, without penalty, by giving 60 days written notice
          to the other party.  

               RENT 3.01  --  Sub-Lessee hereby covenants and agrees to pay
          during the term hereof annual rent of thirteen thousand, two
          hundred dollars ($13,200), payable without deduction, set-off, or
          demand in equal monthly installments of one thousand, one hundred
          dollars ($1,100), in advance, on the first day of each calendar
          month during the term of this Sublease.  On May 1, 1997, said
          annual rent shall escalate as follows:  Three percent (3%)
          annually.

               3.02  --  All payment of rent shall be made by check payable


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          to Comtex Scientific Corporation, and delivered to 4900 Seminary
          Road, Suite 800, Alexandria, Virginia 22311 or to such other
          person and place as may be designated in writing from Sub-Lessor
          to Sub-Lessee from time to time.

               3.03  --  Notwithstanding any of the other rights of Sub-
          Lessor set forth in the lease, during the term of this Sublease,
          should the rent or other charges reserved herein remain unpaid on
          the fifth day after the date when the same ought to be paid, the
          Sub-Lessor may at its option, make a service charge for the
          purpose of defraying the expenses incidental to handling
          delinquent payments.  Such charges shall be in an amount of five
          percent (5%) of the delinquent rent and charges or a minimum
          charge of fifty dollars ($50.00) per month, whichever of the two
          shall be greater.

               3.04  --  No payment by Sub-Lessee or receipt by Sub-Lessor
          of a lesser amount than the monthly installments of rent herein
          stipulated shall be deemed to be other than on account of the
          earliest stipulated rent and/or additional rent; nor shall any
          endorsement or statement on any check or any letter accompanying
          any check or payment of rent be deemed an accord and satisfaction
          and Sub-Lessor may accept such check for payment without
          prejudice to Sub-Lessor's right to recover the balance of such
          rent and/or additional rent or pursue any other remedy provided
          in this Sublease and/or under applicable law.


               ADDITIONAL RENT 4.01  --  (a) Together with the payment of
          each installment of monthly base rent, Sub-Lessee shall also pay
          to Sub-Lessor, as additional rent, hereunder, Sub-Lessee's
          Proportionate Share (as hereinafter defined) of all Additional
          Rent (as such term is defined in the Prime Lease) payable by Sub-
          Lessor under the Prime Lease (as hereinafter defined), including
          reimbursements of Real Estate Taxes, Tenant Electricity Expenses,
          Utility Expenses and Increases in Operating Charges as therein
          set forth.  Said Additional Rent payable by Sub-Lessee hereunder
          may be increased from time to time upon notice from Sub-Lessor
          that Additional Rent payable under the Prime Lease has increased. 
          As used herein, "Sub-Lessee's Proportionate Share" means the
          proportion which the total number of square feet to space in the
          sublease premises bears to the total number of square feet of
          space of the Prime Lease premises.  Sub-Lessor and Sub-Lessee
          stipulate the "Sub-Lessee's Proportionate Share" shall be nine
          point nine percent (9.9%).

               (b)  Sub-Lessor shall credit or pay to Sub-Lessee Sub-
          Lessee's Proportionate Share of any refunds received by Sub-
          Lessor from Landlord under the Prime Lease on account of any


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          overpayment of Additional Rent for which Sub-Lessee has paid its
          Proportionate Share under this Sublease; provided, however, that
          Sub-Lessor shall be entitled to deduct from the aggregate of the
          amount of such refund any and all costs and expenses, including
          reasonable attorneys fees, consultants' fees and disbursements,
          incurred by Sub-Lessor in connection with the obtaining of any
          such refunds.

               SECURITY DEPOSIT 5.01  --  The Sub-Lessor herewith
          acknowledges the receipt from Sub-Lessee of zero dollars ($0),
          which amount shall be retained by the Sub-Lessor as security for
          the faithful performance of all the covenants, conditions and
          agreements; the Sub-Lessor's right to the possession of the
          sublease premises for non-payment of rent or for any other reason
          shall not in any event be affected by reason of the fact that the
          Sub-Lessor holds this security.  The said sum, if not applied
          toward the payment of rent in arrears or toward the payment of
          damages suffered by the Sub-Lessor by reason of the Sub-Lessee's
          breach of the covenants, conditions and agreements of this
          Sublease, is to be returned to the Sub-Lessee when this Sublease
          is terminated, according to these terms, and in no event is the
          said security to be returned until the Sub-Lessee has vacated the
          sublease premises and delivered possession to the Sub-Lessor.  In
          the event that the Sub-Lessor repossesses said sublease premises
          because of the Sub-Lessee's default or because of the Sub-
          Lessee's failure to carry out the covenants, conditions and
          agreements of this Sublease, the Sub-Lessor may apply the said
          security to all damages suffered to the date of said repossession
          and may retain the said security to apply to such damages as may
          be suffered or which accrue thereafter by reason of the Sub-
          Lessee's default or breach.

               USE OF PREMISES 6.01  --  (a)  Sub-Lessee covenants to use
          the premises only for the sole and exclusive purpose of offices
          for the sole and exclusive business of Hadron, Inc.

                    (b)  Without limiting any other provision of this
          Sublease or the Prime Lease, Sub-Lessee shall take good care of
          the sublease premises, suffer no waste or injury thereto and
          shall comply with all laws, orders and regulations which are
          imposed on Sub-Lessor, as tenant under the Prime Lease and are
          applicable to the sublease premises, the building and Sub-
          Lessee's use thereof.

                    (c)  Upon the expiration or termination of this
          Sublease, Sub-Lessee shall quit and surrender the premises to
          Sub-Lessor in the condition such premises were in as of the date
          hereof, broom clean, in good order and condition, ordinary wear
          and tear and damage by fire and other insured casualty excepted. 


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          Sub-Lessee agrees to indemnify and save Sub-Lessor harmless from
          and against any and all loss, cost expense or liability resulting
          from the failure of, or the delay by, Sub-Lessee in so
          surrendering the premises on ore before the expiration date,
          including, without limitation, any claims made by Landlord or any
          succeeding Sub-Lessee founded on such failure or delay.

               INCLUSION OF PRIME LEASE 7.01  --  Sub-Lessee hereby agrees
          to abide by the terms and conditions of the prime lease between
          Plaza IA Associates Limited Partnership, a Virginia limited
          partnership and Comtex Scientific Corporation, a New York
          Corporation, as executed on April 6, 1996, (the "Prime Lease")
          and incorporates by reference the lease agreement attached hereto
          as Exhibit B of Sublease, in all of its provisions with no
          deletions or modifications insofar as each and any of those
          provisions refer and relate to the occupancy and use of the
          sublease premises.  This Sublease is in all respects subordinate
          to the Prime Lease.

               LANDLORD'S CONSENT 8.01  --  Landlord joins herein solely
          and exclusively for the purpose of consenting to this Sublease. 
          Landlord hereby consents to this sublease on the following terms
          and conditions:

               (a)  This consent is expressly conditioned upon the full and
          complete observance by Sub-Lessee of all Sub-Lessor's covenants
          under the above-referenced Prime Lease with regard to the
          sublease premises.  Said consent shall not; however, in any way
          release or discharge Sub-Lessor from any or all of its covenants 
          made under the terms and conditions of the Prime Lease, nor
          constitute a novation of the Prime Lease.  Nor shall this consent
          be deemed to alter, modify or amend any existing lease agreement
          which exists directly between Landlord and the Sub-Lessee with
          regard to other premises in the building.

               (b)  This consent by Landlord shall not constitute a waiver
          of the consent requirement for any future subletting or
          assignment.  It is further understood that all obligations
          required to be performed, and all services required to be
          provided, by Landlord under the Prime Lease, shall run to the
          benefit of Sub-Lessor only and as such, can be enforced or called
          upon only by Sub-Lessor.  Landlord shall have no responsibility
          or liability to the Sub-Lessee by virtue of this consent or
          otherwise, including without limitation, any responsibility to
          perform any such obligations or provide any such services
          whatsoever.

               (c)  Sub-Lessor hereby acknowledges that it is relying on
          its own analysis of Sub-Lessee and Landlord makes no


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          representations of any nature with regard thereto.  Sub-Lessee
          hereby acknowledges that it is relying on its own analysis of
          Sub-Lessor and the sublease premises and Landlord makes no
          representations of any nature with regard thereto.  Landlord has
          provided its form sublease as an accommodation only, and no
          interference, liability or claim is to be asserted as a result
          thereof.  All parties are advised to have this form reviewed by
          their respective counsel and modified to reflect their
          understandings.

               (d)  The Sub-Lessee's address is as follows:

                    Hadron, Inc.

                    4900 Seminary Road, Suite 800

                    Alexandria, VA 22311

                    Attention:  Ms. Amber Gordon


               (e)  Landlord has procured financing, but Landlord may be
          required to obtain the approval of this instrument by Landlord's
          lender.  If such approval is required, the Landlord shall submit
          this instrument after execution by the parties for such approval,
          and in the event such lender shall not unconditionally approve
          this instrument then the Landlord shall have the right to cancel
          this instrument by giving written notice to Sub-Lessor, in which
          event all parties hereto shall automatically be released from any
          and all liability in connection with this instrument to the full
          extent as though it neither been negotiated not executed.

               (f)  Nothing contained herein shall be deemed to create a
          contractual relationship or otherwise between Landlord and Sub-
          Lessee.

               (g)  Sub-Lessor hereby accepts full and complete
          responsibility for the acts and omissions of the Sub-Lessee, its
          employees, guests, contractors and invitees in the sublease
          premises herein described to the same extent as if such act or
          omission had be undertaken by Sub-Lessor.










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               IN WITNESS WHEREOF, the Sub-Lessor has hereunto set his hand
          and Sub-Lessee has set his hand, or caused its corporate name to
          be hereunto subscribed, all on the day and year first above
          written.


          SUB-LESSOR:

          COMTEX SCIENTIFIC CORPORATION
           

          By:  /S/ Charles W. Terry
               ___________________________
               Charles W. Terry, President
           
          SUB-LESSEE:

          HADRON, INC.


          By:  /S/ George E. Fowler
               ___________________________
               George E. Fowler, President
                                             LANDLORD:

                                             Plaza IA Associates Limited
                                             Partnership, a Virginia
                                             limited partnership, hereby
                                             consents to the act of
                                             subletting by Sub-Lessor to
                                             Sub-Lessee, subject to the
                                             terms and conditions herein
                                             set forth, without approving
                                             any of the terms or provisions
                                             set forth in this agreement
                                             between Sub-Lessor and Sub-
                                             Lessee.

                                             By:  PLAZA I-A INC.


                                             Its: General Partner        

                                             By:  _______________________
                                                  Randal B. Kell
                                                  Trust Manger





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          RECOMMENDED FOR LANDLORD'S CONSENT
          THE MARK WINKLER COMPANY


          By:                                                  
               Michael D. Lynch, President













































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