Singapore Airlines Ltd. provides passenger and cargo air transportation services. It operates through four business segments: Airline Operations, Engineering Services, Cargo Operations and Other Services. The Airline Operations segment provides passenger air transportation. The Engineering Services segment offers airframe maintenance and overhaul services, line maintenance, technical ground handling services, and fleet management programs. It also manufactures aircraft cabin equipment; refurbishes aircraft galleys; provides technical and non-technical handling services; and repairs and overhauls hydro-mechanical aircraft equipment. The Cargo Operations segment is involved in air cargo transportation and related services. The Other Services segment includes training of pilots, air charters, and tour wholesaling. The company was founded on January 28, 1972 and is headquartered in Singapore.