Applied Signal Technology, Inc. (AST) is a provider of advanced intelligence, surveillance, and reconnaissance (ISR) solutions for global security. The Company provides domain knowledge in the areas of signals intelligence (SIGINT) and sensor signature processing. Its SIGINT include communications intelligence (COMINT) focusing on broadband and tactical wireless networks, and electronic intelligence (ELINT). Its sensor signature expertise includes processing information from electro-optic, sonar, radar, magnetic, and chemical sensors to detect changes in the environment and provide real-time alerts of potential threats. The Company specializes in the collection, processing, and understanding of signals for ISR missions with low size, weight, and power configurations to enable deployment on unmanned platforms. Its primary customers are the United States Government and defense industry contractors for the United States Government. In September 2009, AST acquired Pyxis Engineering.