| Abbreviation | Definition |
|---|---|
| OMZ | Operational Mission Zone |
| ON | Operational Navigation |
| ONAF | Oil Natural Air Forced |
| ONC | Operational Navigation Chart |
| OND | Operation New Dawn |
| ONDCP | Office of Nation Drug Control Policy |
| ONE | Operation NOBLE EAGLE |
| ONH | Old Naval Hospital |
| ONI | Office of Naval Intelligence |
| ONIR | Om Non Ionizing Radiation |
| ONIR | Overhead Non-imaging InfraRed |
| ONL | Office of Naval Laboratories |
| ONP | Operational Network Protocol |
| ONR | Office of Naval Research |
| ONS | Office of Naval Science |
| ONS | Operational Needs Statement |
| ONT | Office of Naval Technology, Arlington, VA |
| ONV | Optical Night Vision goggles |
| ONW | Operation Northern Watch |
| OOA | Object Oriented Analysis |