| Abbreviation | Definition |
|---|---|
| OOB | Order Of Battle |
| OOBC | Officer Ordnance Basic Course |
| OOD | Officer Of The Day |
| OOD | Officer Of the Deck |
| OODA | Observe, Orient, Decide, Act |
| OODA | Operations, Opportunity, Defense, Action |
| OODBMS | Object- Oriented Database Management System |
| OOG | Only On GUAM |
| OOI | Organize, Observe, Instruct |
| OOL | Order Of Loss |
| OOL | Out Of Line |
| OOO | Onsite, Offsite, and Offshore |
| OOO | Out Of Options |
| OOP | Object-Oriented Programming |
| OOPS | Overnight Operational Planning System |
| OORTSF | Object-Oriented Real Time Software Foundation |
| OOT | Object Oriented Technology |
| OOT | Out Of Time |
| OOTB | Out Of The Blue |
| OOTD | Officer Of The Day |