| Abbreviation | Definition |
|---|---|
| RIM | Rehabilitation Institute of Michigan |
| RIMS | Rhode Island Medical Society |
| RINC | Research in Networked Communication |
| RIQI | Rhode Island Quality Institute |
| RISE | Reaching Independence through Self Employemnt |
| RISM | Receuil International De Sources Musicales |
| RIST | Research Organization for Information Science and Technology |
| RITF | Task Force to projote Regional Institutes |
| RIWF | Rhode Island Wildlife Federation |
| RJA | Robinson Jeffers Association |
| RLAO | Retail Liquor Association of Oklahoma |
| RLF | Roy Lichtenstein Foundation |
| RLFG | Rescue League For Greyhounds |
| RLI | Rotary Leadership Institute |
| RLM | Right to Life of Michigan |
| RLSF | Restless Legs Syndrome Foundation |
| RLSG | Restless Legs Support Group |
| RLVAF | Roger L. Von Amelunxen Foundation |
| RLVAFI | Roger L. Von Amelunxen Foundation, Inc. |
| RMA | Risk Management Association |