| Acronym | Definition |
|---|
| NIEP➣National Institute for Economic Policy (South Africa) |
| NIEP➣National Institute for Earth Physics (Romania) |
| NIEP➣Nuclear Industry Evaluation Program |
| NIEP➣Native Instruments Elektrik Piano |
| NIEP➣National Institute for Educational Planning (Newport, CA) |
| NIEP➣Network of Indian Environment Professionals (India) |
| NIEP➣Natural and Induced Environments Panel |