Applied Signal Technology, Inc. Presenting at the
Thomas Weisel Partners Security Technology Conference

Sunnyvale, CA, December 2, 2005 – Applied Signal Technology, Inc. (NASDAQ – APSG) will be presenting at the Thomas Weisel Partners Security Technology Conference in New York.

This event is being audio web cast live on Monday December 5, 2005, at 10:15AM Eastern (7:15AM Pacific) and can be accessed at the Applied Signal Technology, Inc. web site at www.appsig.com or www.veracast.com/webcasts/twp/security2005/56105156.cfm.

The audio web cast will be archived for 30 days after the conference ends.

Applied Signal Technology, Inc. provides advanced digital signal processing products, systems, and services in support of intelligence, surveillance, and reconnaissance for global security. For further information about Applied Signal Technology’s products and services, visit our web site at www.appsig.com.