| Acronym | Definition |
|---|
| NIRSC➣National Incident Radio Support Cache |
| NIRSC➣National Interagency Radio Support Cache |
| NIRSC➣Northern Ireland Region of Shopping Centres (est. 1989; UK) |
| NIRSC➣Non-Ionizing Radiation Safety Committee (California) |
| NIRSC➣National Information and Referral Support Center (Washington, DC) |