| Acronym | Definition |
|---|
| NSIC | Northern Sun Intercollegiate Conference (sports) |
| NSIC | National Small Industries Corporation (India) |
| NSIC | National Sport Information Centre (Australia) |
| NSIC | National Scholastic Indoor Championships (track and field competition) |
| NSIC | National Strategy Information Center (US government) |
| NSIC | National Storage Industry Consortium |
| NSIC | Nuclear Safety Information Center |
| NSIC | National Statistical Information Center |
| NSIC | Nikon Super Integrated Coating (photography) |
| NSIC | Naval Security and Investigative Command |
| NSIC | National Stringed Instrument Corporation |