| Abbreviation | Definition |
|---|---|
| ROY | Reach Our Youth |
| RPA | Rhythmflex Parents Association |
| RPB | Research to Prevent Blindness |
| RPF | Rights Protection Fund |
| RPI | Retinitis Pigmentosa International |
| RPIS | Retinitis Pigmentosa International Society for Degenerative Eye Disease and Related Disorders |
| RPISDEDRD | Retinitis Pigmentosa International Society for Degenerative Eye Disease and Related Disorders |
| RPPI | Radcliffe Public Policy Institute |
| RPPI | Reason Public Policy Institute |
| RPPI | Rigid Plastic Packaging Institute |
| RPSF | Rochester Public Schools Foundation |
| RPW | Robert Penn Warren Center |
| RRAD | Respite and Research for Alzheimer's Disease |
| RRAS | Redwood Region Audubon Society |
| RRC | Rancho Reata Community Alliance |
| RREC | Rochester Regional Equestrian Center |
| RRF | Reading Reform Foundation |
| RRF | Retirement Research Foundation |
| RRF | Riders Rights Foundation |
| RRF | River Run Foundation |