| Abbreviation | Definition |
|---|---|
| OER | Officer Evaluation Report |
| OER | Operational Electronic Intelligence (ELINT) Requirements |
| OET | Office of Emergency Transportation (DOT) |
| OEW | Offensive Electronic Warfare |
| OEX | Ordnance and Explosives |
| OF | Objective Force |
| OF | Officer (NATO) |
| OF | Opposing Force |
| OFB | Ordnance Factory Board |
| OFC | Objective Force Capabilities |
| OFC | Office |
| OFC | Organization For Combat |
| OFCO | Offensive Counterintelligence Operation |
| OFCO | Offensive Counterintelligence Operations |
| OFDA | Office of US Foreign Disaster Assistance |
| OFDI | Other Forces Disability Investigations |
| OFF | Office |
| OFF | Officer |
| OFG | Operational Financial Group |
| OFHIS | Operational Fleet Hospital Information System |