Os

Os or OS may refer to:

Operating system
The [[wiktionary:os#Noun | os]] is each end of the cervix, internal (to the uterus) and external (to the vagina)
Os, Hedmark, a municipality in Norway
Os, Hordaland, a municipality in Norway
Osmium, Os, the symbol for the chemical element
Open Source
Occasional Saint, the NZ Indie Rock group
Ordnance Survey
Old Style Julian Calendar
Ossetian language (ISO 639 alpha-2, os)
Austrian Airlines, its IATA code
Ogawa Seiki, a Japanese manufacturer of model airplane engines
A football team from Os, Hordaland established 1905
The Anglo-Saxon rune. One of the Æsir
Oddstuff Oddstuff.com an Internet Site known maninly for its forums.
Olympic Games, an international multi-sport event taking place every four years
Outlaw Star, a popular Japanese anime

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