| Acronym | Definition |
|---|
| OOC | Out of Character (online role-playing) |
| OOC | Out of Class (various organizations) |
| OOC | Out-Of-Character (gaming) |
| OOC | Out Of Control |
| OOC | Outfit of Choice (pageants) |
| OOC | Order of Creation (theology) |
| OOC | Out of Committee (various locations) |
| OOC | Out of Camera (photography) |
| OOC | Office of Citizenship (US CIS) |
| OOC | Out of Curiosity |
| OOC | Optical (WDM) Overhead Channel |
| OOC | Out of Character |
| OOC | Original or Copy |
| OOC | Out of Core |
| OOC | Office of Counsel (US Navy) |
| OOC | Out of Context |
| OOC | Out-Of-Conference |
| OOC | Oman Oil Company |
| OOC | Out of Course (Singapore Armed Forces) |
| OOC | oil on canvas (type of painting) |
| OOC | Osaka Organic Chemical Industry Ltd. (Japan) |
| OOC | Office of Compliance (various organizations) |
| OOC | Out-Of-Commission |
| OOC | Out of Country |
| OOC | Office of the Chairman |
| OOC | Out of Coffee |
| OOC | Orlando Opera Company (est. 1958; Orlando, FL) |
| OOC | Optical Orthogonal Code |
| OOC | Out of Contract |
| OOC | Out of Clan (gaming) |
| OOC | Out of Calibration |
| OOC | Out of Cycle |
| OOC | Out of Concentration (Dark Age of Camelot online game) |
| OOC | Oil on Cuttings |
| OOC | Officer of Cadets (Australian Defence Forces) |
| OOC | Operational Oceanography Center |
| OOC | Object-Oriented COBOL |
| OOC | Out of Code |
| OOC | Other Operating Costs (financial management) |
| OOC | Originating Office Control |
| OOC | Olympics Organizing Committee |
| OOC | Orders-on-Contract |