| Acronym | Definition |
|---|
| NSN➣National Stock Number |
| NSN➣Nokia Siemens Networks |
| NSN➣NATO Stock Number |
| NSN➣National Storytelling Network |
| NSN➣New Schools Network (UK) |
| NSN➣Night Sky Network (various organizations) |
| NSN➣New Substances Notification (CEPA) |
| NSN➣National Service Network (UK) |
| NSN➣National Student Number (NZ) |
| NSN➣Never Shout Never (band) |
| NSN➣Never Say Never |
| NSN➣No Shave November |
| NSN➣National Support Network |
| NSN➣Native Sovereign Nation |
| NSN➣No Stigma Network (peer support) |
| NSN➣Nelson, New Zealand - Nelson (Airport Code) |
| NSN➣No Serial Number |
| NSN➣No Such Number |
| NSN➣National Seismic Network (earthquake monitoring; various nations) |
| NSN➣Noskillsneeded (gaming clan) |
| NSN➣NASA Space Network |
| NSN➣National Supervisory Network |
| NSN➣National Screening Nursery |
| NSN➣National Sleep Network |
| NSN➣Northern Sportsman's Network |
| NSN➣Network Service Number (telecommunications) |
| NSN➣No Soap Needed |
| NSN➣Non Special Need (adoptions) |