Abbreviations
- Obs., an abbreviation for "observation" used when adding a remark, notice or comment to a piece of text; see also Annotation
- OBS, an abbreviation for "Obviously"
- OBS, Order of the Black Sun, A gaming group around since early 2004 spanning many games from First Person Shooters to MMOs. Based originally on the Black Sun Crime Syndicate in the Star Wars Universe.
- OBS, an abbreviation for Océ Business Services. The outsourcing business of Océ
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