| Abbreviation | Definition |
|---|---|
| NSWS | National Society for Women's Suffrage |
| NTHS | National Technical Honor Society |
| NTHS | National Technical Honors Society |
| NTOS | Nashville TN Ornithological Society |
| NTOS | North Texas Objectivist Society |
| NTRS | National Therapeutic Recreation Society |
| NTSI | Neuro Trauma Society of India |
| NTVA | Norges Tekniske Vitenskapsakademi |
| NTVA | Norwegian Academy of Technological Sciences |
| NTWS | National Thalassemia Welfare Society |
| NULIS | Norwich Union Life Insurance Society |
| NUPS | Newcastle University Photographic Society |
| NUPS | Northern Utah Paranormal Society |
| NUSB | National United Society of the Blind |
| NVAG | Nederlandse Vereniging voor Algemene Gezondheidszorg |
| NVAG | Netherlands Association for General Health Care |
| NVBM | Dutch Meteorological Society |
| NVBM | Nederlandse Vereniging van Beroeps Meteorologen |
| NVBS | Northern Virginia Bead Society |
| NVBS | Northern Virginia Bonsai Society |