OS

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Look up OS, Os, or os in Wiktionary, the free dictionary.

OS may refer to:

• O.S. Engines, a Japanese manufacturer of model aircraft engines
• Oculus sinister, meaning "left eye" in eyeglass prescriptions
• Old Style, a term used in historical studies to indicate that a date conforms to the Julian calendar
• Open SEAT, a tennis tournament in Barcelona now known as the Torneo Godó
• Open source, a software development model
• Operating system, the software that manages the hardware and software of a computer
• Ordinary Seaman (occupation), an unlicensed member of the deck department of a merchant ship
• Ordnance Survey, the national mapping agency for Great Britain
• Ohtahara syndrome, a brain disorder
• Opening snap, a heart sound present in individuals with AV valve stenosis
• Outlaw Star, a manga and anime series
• Austrian Airlines (IATA designator)
• Ossetic language (ISO 639-1 abbreviation)

Os may also refer to:

• External orifice of the uterus, known as the external os
• Internal orifice of the uterus, known as the internal os
• Os, Hedmark, a municipality in Norway
• Os, Hordaland, a municipality in Norway
• Os, Østfold, a parish in Norway
• Ōs, in Old English denoting a god in Anglo-Saxon paganism
• Osmium, a chemical element whose symbol is "Os"
• Os du Randt (born 1972), South African rugby player
• Os Guinness (born 1941), English author and social critic
• Oś, Kluczbork County, Poland

[edit] See also

• Per os, medical term for ingestion by mouth

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