| Abbreviation | Definition |
|---|---|
| NVSI | Neo Vista System Integrators |
| NVT | Network Virtual Terminal |
| NXD | Native XML Database |
| NXE | Native XML Execution |
| NXF | Net FiberExpress |
| NYP | Not Yet Prefetched |
| NYSIA | New York Software Industry Association |
| O | Object |
| O | Overclocking |
| OA | Ole Automation |
| OA | On-board Administrator |
| OA | Open Apple |
| OA | Open Appserver |
| OAA | Open Agent Architecture |
| OAF | Object Activation Framework |
| OAG | Open Applications Group |
| OAGF | Office of the Accountant General of the Federation |
| OAI-PMH | Open Archives Initiative Protocol for Metadata Harvesting |
| OAK | Object Application Kernel |
| OAM | Object Access Model |