General Dynamics is a global aerospace and defense company organized into four operating segments: Aerospace, Marine Systems, Combat Systems, and Technologies. In Aerospace, it manufactures business jets under the Gulfstream brand and operates a global network of aircraft maintenance and support facilities. Marine Systems designs and builds submarines and guided-missile destroyers for the U.S. Navy under long-term contracts. Combat Systems produces main battle tanks, armored vehicles, and munitions through both domestic and European operations. The Technologies segment provides federal information technology modernization, cloud and cybersecurity services, and mission-critical defense electronics. The company derives the majority of its revenue from contracts with the U.S. Department of Defense, supplemented by commercial business jet sales and international defense exports, generating revenue through fixed-price contracts, cost-reimbursement arrangements, and time-and-materials engagements.