March 25, 1996

          Telecommunications Industries, Inc.
          4900 Seminary Road, Suite 800
          Alexandria, Virginia  22311

          Infotechnology, Inc.
          4900 Seminary Road, Suite 800
          Alexandria, Virginia  22311


          Gentlemen:

               Reference is made to (a) that certain Asset Purchase
          Agreement (the "Purchase Agreement") dated May 16, 1995 by and
          between Comtex Scientific Corporation ("CSC") and
          Telecommunications Industries, Inc. ("TII"), (b) that certain Put
          Agreement (the "Put Agreement") dated May 16, 1995 by and between
          CSC and TII, (c) that certain Agreement dated May 16, 1995 by and
          between CSC and Infotechnology, inc. ("Infotech") and (d) that
          certain Amended, Consolidated and Restated 10% Senior
          Subordinated Secured Note dated May 16, 1995 made by CSC and
          payable to Infotech (the "Note")

               CSC and TII and Infotech desire to clarify certain
          provisions of the above-referenced agreements and instrument, and
          therefore agree as follows:

               (1)  CSC exercised its right, under the Purchase Agreement
                    and the Put Agreement, to require TII to repurchase
                    certain assets, and to require TII to re-assume certain
                    liabilities and obligations, on March 25, 1996.

               (2)  The Put Assets, as defined in the Purchase Agreement
                    and the Put Agreement, included all of the assets,
                    rights and properties constituting or used exclusively
                    in the Micro Research Industries business.  The Put
                    Liabilities, as defined in the Purchase Agreement and
                    the Put Agreement, included all liabilities and
                    obligations of every kind or nature, contingent,
                    matured or otherwise, of the Micro Research Industries
                    business, as well as all other Assumed Liabilities (as
                    defined in the Purchase Agreement.





          Telecommunications Industries, Inc.
          Infotechnology, Inc.
          March 25, 1996
          Page 2

               (3)  In lieu of seeking indemnification or other
                    reimbursement form TII, whether under the Purchase
                    Agreement or otherwise, CSC, at any time and by written
                    notice to Infotech, may elect to have the principal
                    amount of the Note reduced by the amount of any damage,
                    loss, liability, judgment, fine, penalty, assessment,
                    settlement, cost or expense incurred by CSC including,
                    without limitation, reasonable expenses of
                    investigation, reasonable attorneys' fees and other
                    reasonable legal costs and expenses incident to any of
                    the foregoing or to the enforcement of this paragraph,
                    whether or not suit is brought or, if brought, whether
                    or not such suite is successful in whole or in part
                    arising out of or relating to the Micro Research
                    Industries business.

               If the foregoing correctly sets forth our understanding,
          please execute this letter in the spaces provided below.

                                        Sincerely,


                                        /S/ Charles W. Terry
                                        __________________
                                        Charles W. Terry

          AGREED:


          INFOTECHNOLOGY, INC.


          By:   /S/ C.W. Gilluly
               ________________
          Title:    President


          TELECOMMUNICATIONS INDUSTRIES, INC.

          By:   /S/ C.W. Gilluly
               ________________
          Title:    President