MANCHESTER EQUIPMENT CO., INC.
                                 160 Oser Avenue
                            Hauppauge, New York 11788
                                 (516) 434-8700


                            NOTICE OF POSTPONEMENT OF
                         ANNUAL MEETING OF SHAREHOLDERS
                 Formerly Scheduled To Be Held on April 13, 1999
                           Postponed to April 15, 1999

To the Shareholders of
     MANCHESTER EQUIPMENT CO., INC.:

     NOTICE IS HEREBY GIVEN that the Annual Meeting of Shareholders (the "Annual
Meeting") of Manchester Equipment Co., Inc. (the "Company"),  formerly scheduled
to be held on  Tuesday,  April 13,  1999,  at 10:00 a.m.,  local time,  has been
postponed to Thursday, April 15, 1999, at 10:00 a.m. local time, to consider and
act upon the following proposals:

     1.   To elect six (6)  Directors to serve until the 2000 Annual  Meeting of
          Shareholders.

     2.   To ratify the reappointment of KPMG LLP as independent auditors of the
          Company for the year ending July 31, 1999.

     3.   To transact such other business as may properly come before the Annual
          Meeting or any adjournment or postponement thereof.

         The  location  of the Annual  Meeting,  Smithtown  Sheraton,  110 Motor
Parkway, Smithtown, New York, has not been changed. A proxy statement describing
the matters to be  considered at the Annual  Meeting was mailed to  shareholders
with the  initial  Notice of Annual  Meeting  on or about  March 3,  1999.  Only
holders of record of the  Company's  Common  Stock at the close of  business  on
February  22,  1999,  the Record Date for the Annual  Meeting,  are  entitled to
notice of and to vote at the Annual Meeting.

                                             By Order of the Board of Directors,

                                             Joel G. Stemple
                                             Secretary

Hauppauge, New York
March 22, 1999