Sunnyvale, CA. April 7, 2005– Applied Signal Technology, Inc. (NASDAQ - APSG) will be presenting on Monday April 11, 2005, 9:45AM EST (6:45AM PST) at the SunTrust Robinson Humphrey 34th Annual Institutional Investor conference taking place at Ritz-Carlton-Buckhead in Atlanta, GA.

Via the web cast, investors will have the opportunity to listen to this event simultaneously over the internet through Applied Signal Technology, Inc. website located at http://www.appsig.com. To listen, please go to our website at least fifteen minutes early to download, and install any necessary audio software. For those of you who cannot listen to the live broadcast a replay will be available for 60 days shortly after the event by going through SunTrust Robinson Humphrey website at http://www.rhco.com.

Applied Signal Technology, Inc. provides advanced digital signal processing products, systems, and services used in reconnaissance of telecommunication signals for intelligence gathering, a process referred to as signal intelligence (SIGINT). Our primary customers are the United States government and its allies.

Our company headquarters are in Sunnyvale, California. Additional engineering offices are in Maryland, Virginia, Utah, Oregon and Texas.

Applied Signal Technology, Inc. designs, develops, manufactures and markets advanced digital signal processing equipment to collect and process a wide range of telecommunications signals for signal reconnaissance applications. For additional Company-related information, visit our website at www.appsig.com.

Except for historical information contained herein, matters discussed in this news release may contain forward-looking statements that involve risks and uncertainties that could cause actual results to differ materially from those expected. Statements as to the estimated value of the subcontract and period of time over which revenue may be generated are forward-looking statements. The risks and uncertainties associated with these statements include whether the subcontract will be awarded for our anticipated price; whether this subcontract will be profitable; whether the subcontract might be terminated prior to completion; whether we will be able to hire qualified staff as needed; and other risks detailed from time to time in our SEC reports including our latest Form 10-K filed for the fiscal year ended October 31, 2004.