American Science and Engineering, Inc.: Notice of Upcoming Conference Call Q1 FY 2002 Earnings Results.

Business Editors

BILLERICA, Mass.--(BUSINESS WIRE)--Aug. 2, 2001

American Science and Engineering, Inc. (AMEX: ASE) will announce its first quarter results after the market closes on Thursday, August 2, 2001. You will receive a copy of the full press release via fax shortly thereafter and prior to the conference call.

Ralph Sheridan, Chief Executive Officer and President, Andrew Morrison, Chief Financial Officer and Vice President, and Ned Lewis, General Counsel, will host the conference call on Friday, August 3, 2001 @ 10:00 am (EST).

To participate in the conference call please follow these instructions:

On the day of the teleconference, please dial [phone] at least 10 minutes prior to starting time. For International participants, please dial [phone]. Please tell the Operator that you are a participant for the American Science and Engineering's earnings conference call led by Ralph Sheridan and Andrew Morrison. You will be placed on hold until the conference call is ready to begin.

An audio replay of the teleconference will be available, in its entirety, 2 hours after the conference call for a 24-hour period by dialing [phone]. For our international participants the number is [phone]. The conference ID# is 1524446.