General Dynamics C4 Systems is a division of General Dynamics Corporation. Based in Scottsdale, Ariz., General Dynamics is a leading integrator of secure communication and information systems and technology. The company specializes in command and control, communications networking, space systems, computing and information assurance for defense, government and select commercial customers in the United States and abroad. Its leadership credentials come from applying world-class capabilities to create solutions for use on land, at or under the sea, in the air and in space. General Dynamics is also one of the global leaders in the development of software-defined radio technology and has successfully fielded the only fully software-programmable radio in use by United States forces. Additionally, the company is a prime contractor and lead-systems integrator for the Warfighter Information Network, Joint Tactical Radio System and the Rescue 21 programs in the United States. General Dynamics C4 Systems has an office in Huntsville, Ala.