| Acronym | Definition |
|---|
| NSEC➣Network Switching Engineering Center |
| NSEC➣Nano Second |
| NSEC➣Nanoscale Science and Engineering Center (Cambridge, MA) |
| NSEC➣Norwegian Seafood Export Council (est. 1991; Norway) |
| NSEC➣National Security Engineering Center (US DoD) |
| NSEC➣North-South Economic Corridor (transport route; Asian Development Bank) |
| NSEC➣National Safety Education Center (Northern Illinois University) |
| NSEC➣National Solar Energy Centre (Commonwealth Scientific and Industrial Research Organisation; Newcastle, New South Wales, Australia) |
| NSEC➣National System for Emergency Coordination (US EPA) |