| Abbreviation | Definition |
|---|---|
| OCA | Obstacle Clearance Altitude |
| OCC | Operational Control Center |
| OCF | Operational Check Flight |
| OCH | Obstacle Clearance Height |
| ODLF | Onboard Data Load Function |
| ODMS | Oil Debris Monitoring System |
| ODN | Open Data Network |
| ODS | Overheat Detection System or Oil Debris Sensor |
| OEA | Oxygen Enriched Air |
| OEM | Original Equipment Manufacturer |
| OFAR | Overhead Flight Attendant Rest |
| OFCR | Overhead Flight Crew Rest |
| OFP | Operational Flight Profile |
| OFV | Outflow Valve |
| OGV | Outlet Guide Vanes |
| OH | OverHauled |
| OHMF | Onboard Health Management Function |
| OJ | Override Jettison |
| OJC | Johnson County Executive Airport |
| OJMC | Override Jettison Motor Controller |