| Acronym | Definition |
|---|
| NIN➣National Insurance Number (UK) |
| NIN➣Nine Inch Nails (band) |
| NIN➣National Institute of Nutrition (India) |
| NIN➣National Institute of Nutrition |
| NIN➣Now I'm Nothing |
| NIN➣No Introduction Needed |
| NIN➣Netherlands Institute for Neuroscience |
| NIN➣National Identification Number |
| NIN➣National Information Network |
| NIN➣news.individual.net (news group/server) |
| NIN➣Nouvelle Imprimerie du Niger (French) |
| NIN➣Notice of Intent to Negotiate |
| NIN➣NATO Index Number |
| NIN➣Naval Integrated Networks |
| NIN➣Noise-Injection Network |