| Abbreviation | Definition |
|---|---|
| REPOS | Repository |
| REVEL | Really Easy Video Encoding Library |
| RFL | Regional Foundation Library |
| RFOL | Rocklin Friends of the Library |
| RG | Reader Group |
| RGL | Regulatory and Guidance Library |
| RGL | Ruby Graph Library |
| RGML | Rory Gallagher Music Library |
| RHPL | Richmond Hill Public Library |
| RIBG | Reseau Informatise des Bibliotheques Gouvernementales |
| RIF | Reading Is Fun |
| RIL | radio interface library |
| RILA | Rhode Island Library Association |
| RL | Reading Literature |
| RL | Rhic Library |
| RLA | Russian Library Association |
| RLAL | Round Lake Area Library |
| RLCC | Regional Library Computer Center |
| RLF | Regional Library Facilities |
| RLG | Research Libraries Group |