Research, design, development, manufacture and integration of advanced technology systems, products and services. Specialties include aeronautics, electronic systems, and space systems... Lockheed Martin

Development, delivery and support of advanced defence and aerospace systems, including manufacturing military aircraft, surface ships, submarines, fighting vehicles, radar, avionics, communications, electronics and guided weapon systems... BAE Systems

Products and services in the fields of commercial airlines, air traffic management, and integrated defense systems. Also solid-state electronics development for commercial, defense and space applications... Boeing Company