| Acronym | Definition |
|---|
| NIW➣National Interest Waiver |
| NIW➣Northern Ireland Water (UK) |
| NIW➣Network Install Wizard |
| NIW➣Nieuw Israelietisch Weekblad (Dutch: New Israelite Weekly; Netherlands) |
| NIW➣Network Installation Wizard (Microsoft) |
| NIW➣National Institute of Webographers (real estate professionals) |
| NIW➣Naval Inshore Warfare |
| NIW➣Night In Weather |