| Acronym | Definition |
|---|
| NIWS➣Nights in White Satin (Moody Blues song) |
| NIWS➣National Institute of Watersports (Panaji, Goa, India) |
| NIWS➣National Institute for Workplace Safety (Longwood, FL) |
| NIWS➣New Intelligent Workstation Systems Co. Ltd. (Japan) |
| NIWS➣NATO Intelligence Warning System |
| NIWS➣Northern Ireland Water Service (now Northern Ireland Water; UK) |