| Abbreviation | Definition |
|---|---|
| NIP | Notional Intelligence Point |
| NIPRNET | Nonsecure Internet Protocol Router Network |
| NIPRNET | Non-Secure Internet Protocol Router Network |
| NIPS | Naval Intelligence Processing System |
| NIPS | NMCS (National Military Command System) Information Processing System |
| NIPS | NMCS Information Processing System |
| NIPS | Northern Italian Pipeline System |
| NIR | Near Infrared |
| NIRT | Nuclear Incident Response Team |
| NIS | National Military Command System Information System |
| NIS | NMCS (National Military Command System) Information System |
| NIS | Non-Imaging Sensor |
| NISH | Noncombatant Evacuation Operation (NEO) Intelligence Support Handbook |
| NISP | National Intelligence Support Plan |
| NISP | Nuclear Weapons Intelligence Support Plan |
| NISPOM | National Industrial Security Program Operating Manual |
| NIST | National Intelligence Support Team |
| NIT | Near Infrared Transmittance |
| NIT | Network Integration Test |
| NITES | Navy Integrated Tactical Environmental System |