| Acronym | Definition |
|---|
| NAOP➣National Association for Olmsted Parks (Washington, DC) |
| NAOP➣National Academy of Psychology (India) |
| NAOP➣North American Open Pairs (bridge championship) |
| NAOP➣Nuclear Asset Optimization Plan |
| NAOP➣Noisy Act of Protest (band) |
| NAOP➣National Alliance for Optional Parenthood (previously National Organization for Non-parents) |