American Science & Engineering, Inc. Notice of Upcoming Earnings Conference Call Q3 FY 2002.

Business/Technology Editors

BILLERICA, Mass.--(BUSINESS WIRE)--Feb. 4, 2002

American Science & Engineering, Inc. (AMEX:ASE) will announce its third quarter (ended December 31, 2001) fiscal year 2002 results after the market closes on Tuesday, February 5th. You will receive a copy of the full press release via fax shortly thereafter and prior to the conference call.

Ralph Sheridan, President and Chief Executive Officer, Andrew Morrison, Vice President and Chief Financial Officer, and Edwin Lewis, Vice President and General Counsel will host the conference call on Wednesday, February 6 @ 10:00 a.m. (EST) to discuss the results and respond to questions.

QUESTIONS? If you have prepared questions, please submit them prior to the conference call via fax to Kori Michalek at 978-262-8812 or e-mail them to [e-mail]. The earnings presentation will be followed by a question and answer session.

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, dial [phone]. Please tell the Operator that you are a participant of the American Science and Engineering 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, starting at 7 p.m. EST for a 48-hour period by dialing (800)-428-6051. Internationally, please dial [phone]. The conference ID# is 231206.

AS&E develops and manufactures sophisticated X-ray inspection products for critical detection and security applications. These systems are solving an expanding range of inspection problems including detecting car and truck bombs, combating weapons smuggling, and imaging cargo to expose trade fraud and illegal immigration. AS&E's patented Z(R) Backscatter technology detects plastic explosives, illegal drugs, and other contraband, even when artfully concealed in complex backgrounds by terrorists and smugglers. AS&E's High Energy Systems Division manufactures linear accelerators for a variety of applications including medical, scientific, security, electron beam curing and non-destructive testing. For more information on AS&E products and technologies, please visit the Company's web site at http://www.as-e.com.