General Dynamics Corporation is an aerospace and defense company that offers a portfolio of products and services in business aviation, combat vehicles, weapons systems and munitions, information technology services, command, control, communications, computers, intelligence, surveillance and reconnaissance (C4ISR) solutions, and shipbuilding and ship repair. The company operates in five business segments: Aerospace, Combat Systems, Mission Systems, Information Technology, and Marine Systems. The Aerospace segment designs, manufactures, and supports advanced business-jet aircraft. The Combat Systems segment offers combat vehicles, weapons systems, and munitions primarily for government customers. The Mission Systems segment delivers mission-critical C4ISR products and systems. Information Technology creates secure IT networks and systems and services for defense and intelligence, state and local government, and commercial customers. The Marine Systems segment designs and builds nuclear-powered submarines, surface combatants, and auxiliary and combat-logistics ships as well as ships for commercial customers.