| Abbreviation | Definition |
|---|---|
| NRR | Neural Regeneration Research |
| NRRC | Natural Resource Research Center |
| NRRG | Natural Resources Research Group |
| NRRG | Neuromotor Rehabilitation Research Group |
| NRRG | Norwegian Radiography Research Group |
| NRRN | National Regional Research Network |
| NRRN | Nuclear Receptor Research Network |
| NRRR | Nematode Regional Research Review |
| NRS | Northern Research Station's |
| NRSA | National Research Service Award |
| NRSA | National Research Service Awards |
| NRSC | Nutrition Research Steering Committee |
| NRSE | Nuremberg Research Seminar in Economics |
| NRSN | Norwegian Research School in Neuroscience |
| NRSN | Norwegian Research School of Neuroscience |
| NRT | NSF Research Traineeship |
| NRTC | National Research and Training Center |
| NRTC | National Research Training Center |
| NRU | Nursing Research Unit |
| NSARP | Nirex Safety Assessment Research Programme |