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The Boeing Company is an aerospace company. Its segments include Commercial Airplanes (BCA), Defense, Space & Security (BDS), and Global Services (BGS). Its BCA segment develops, produces and markets commercial jet aircraft principally for the commercial airline industry worldwide. Its family of commercial jet aircraft in production includes the 737 narrow-body model and the 767, 777 and 787 wide-body models. Its BDS segment is engaged in the research, development, production and modification of manned and unmanned military aircraft and weapons systems for strike, surveillance and mobility. Its BGS segment provides services to its commercial and defense customers worldwide. It sustains aerospace platforms and systems with a range of products and services, including supply chain and logistics management, engineering, maintenance and modifications, upgrades and conversions, spare parts, pilot and maintenance training systems and services, technical and maintenance documents, and others.