| Abbreviation | Definition |
|---|---|
| NXQ | No X-Cues |
| NXUG | UniGraphics NeXt generation |
| NYAG | New York Apple Growers |
| NZR | Noorton Zip Rescue |
| NZR | Norton Zip Rescue |
| O | Output |
| O2I | Object-Oriented Interface |
| OA | Object Adapter |
| OA | Org.Apache |
| OAD | Object Activation Daemon |
| OAF | OnAirForce |
| OAF | Open Archives Forum |
| OAF | Outrage Animation File |
| OAL | OEM Adaptation Layer |
| OAL | Open Audio License |
| OAM | Optical Authoring Manager |
| OAS | Office Administration System |
| OAS | Orbiter Avionics Software |
| OASE | Open Aanbod Software Expertise |
| OASIS | Online Automated Scheduling Information Software |