American Science and Engineering, Inc. Announces Notice of Upcoming Earnings Conference Call Q1 Fiscal Year 2004 Results.

Business Editors/High-Tech Writers

BILLERICA, Mass.--(BUSINESS WIRE)--July 28, 2003

American Science and Engineering, Inc. (AMEX: ASE) will announce its first quarter (ended June 30, 2003) fiscal year 2004 results after the market closes Tuesday, July 29. You will receive a copy of the full press release via fax and/or Business Wire shortly thereafter.

Dr. Roger Heinisch, Interim President and CEO, and Ted Owens, Vice President and Chief Financial Officer, will host the conference call on Wednesday, July 30 at 11 a.m. ET 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 Laura Berman, Director of Corporate Communications, at 1-978-262-8812 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 1-800-915-4836 at least 10 minutes prior to starting time. For international participants, dial 1-973-317-5319. Please tell the Operator that you are a participant of the American Science and Engineering earnings conference call led by Roger Heinisch and Ted Owens. 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 1 p.m. ET for a 48-hour period by dialing 1-800-428-6051. Internationally, please dial 1-973-709-2089. The conference identification number is 301374. The replay will also be available at http://www.as-e.com/investor/investor.html immediately following the conference.

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 Shaped Energy(TM) X-ray inspection systems combine material discrimination features of Z(R) Backscatter imaging with the penetration capability of high-energy X-rays for dense cargoes, without the problems caused by excessive radiation. 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 http://www.as-e.com.