OS
OS is an abbreviation for:
- Austrian Airlines , Austrian airline (IATA code)
- Compagnie de l'Ouest Suisse , Swiss railway company
- Surface protection system in constructions
- Upper Silesia
- High school
- Upper level college Bielefeld (experimental school at Bielefeld University)
- Oculus Sinister (medical name of the left eye )
- Official collection of the Zurich collection of laws
- Swiss Army Officer School
- Officer students of the NVA
- Off-screen in scripts
- Without a conductor, car identification on the Dresden tram, see Dresden tram #Zeit der DDR
- Open Service, see Galileo (satellite navigation) #Services
- Open Skies, see in particular the Open Skies Agreement
- Open source , software with freely available source code
- Operating System, English for operating system
- Warrant
- Ordnance Survey , UK National Land Surveyor
- Organization Spéciale , historic Algerian terrorist organization
- Orientation level , one type of school
- OS (car brand) , former Japanese car brand
- Syria (ICAO code)
OS as a distinguishing mark on license plates:
- Germany: City of Osnabrück and the district of Osnabrück
- Croatia: Osijek
- Netherlands: semi-trailers
- Czech Republic: Okres Ostrava-město , German: Ostrau-Stadt (expiring)
See also:
