Raytheon Technologies Corp. is an American aerospace and defense firm. It is one of the largest aerospace and defense manufacturers in the world by revenue and market capitalization. The company provides aerospace and defense systems and services for commercial, military and government customers. It also provides extensive military intelligence services. The company was founded in 1922 and is headquartered in Arlington, Virginia. The company has four subsidiaries: Collins Aerospace, Pratt & Whitney, Raytheon Intelligence & Space and Raytheon Missiles & Defense. Among its services are the design and manufacture of aircraft engines and the manufacture of mission systems and power controls. It is also involved in the development of sensors, training and well as cyber and software solutions. It manufactures a wide array of guided missiles, air defense systems, satellites and drones and counts the US government as one of its major clients.