The Boeing Co. is an aerospace company, which engages in the manufacture of commercial jetliners and defense, space, and security systems. The company is headquartered in Arlington, Virginia and currently employs 171,000 full-time employees. The firm operates in three segments: Commercial Airplanes (BCA), Defense, Space & Security (BDS), Global Services (BGS). Its BCA segment develops, produces and markets commercial jet aircraft to 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 strike, surveillance and mobility. Its BGS segment provides services to its commercial and defense customers worldwide. The company 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.