General Dynamics is an aerospace and defense company. The company has five operating segments: Aerospace, which provides a family of Gulfstream aircraft and services for business aircraft produced by Gulfstream and other original equipment manufacturers; Combat Systems, which provides combat vehicles, weapons systems and munitions; Information Technology, which provides information technology (IT) services, IT infrastructure modernization and professional services; Mission Systems, which provides mission-critical products and systems; and Marine Systems, which designs and builds nuclear-powered submarines, surface combatants, and auxiliary and combat-logistics ships.