GE Aerospace is an American aircraft company, which engages in the provision of jet and turboprop engines, as well as integrated systems for commercial, military, business, and general aviation aircraft. The firm's portfolio of brands includes Avio Aero, Unison, GE Additive, and Dowty Propellers. It operates through the Commercial Engines & Services and Defense & Propulsion Technologies segments. The Commercial Engines & Services segment is involved in the design, development, manufacturing, and servicing of jet engines for commercial airframes, as well as business aviation and aeroderivative applications. The Defense & Propulsion Technologies segment offers defense engines and critical aircraft systems. The company was founded by Thomas Alva Edison in 1878 and is headquartered in Evendale, OH.