AYESAS (also known as Aydin Yazilim ve Elektronik Sanayi) is a company that provides engineering and manufacturing services for the aerospace and defense industries. It delivers C4ISR (command, control, communications, computer, intelligence, surveillance, and reconnaissance) solutions, avionics and embedded system solutions, system integration solutions, electromechanical and electronics assemblies, wiring harnesses, etc. The company also offers remote sensor control systems, warning systems, radar message converter computers, software test tools, and other products.