Embraer S.A. designs, manufactures and sells aircraft and aviation-related structural parts to the world's commercial aviation, executive aviation and defense markets. It is one of the leaders in the commercial aircraft space. The company operates through 5 segments: Commercial Aviation Market segment includes development, production & sale of commercial jets, mainly in the regional aviation segment and operating leasing of aircraft. Defense and Security Business segment includes the research, development, production and support of military defense aircraft & related products and systems. Executive Aviation segment includes development, production and sale of executive jets and operating leasing of aircraft. Services and Support segment provides support services for aircraft, like modification, flight operation, and maintenance services. Others segment involves the supply of structural parts and mechanical and hydraulic systems and production of agricultural crop-spraying aircraft and customer training.