| Abbreviation | Definition |
|---|---|
| RCLM | ROS Client Library for MATLAB |
| RCLS | Ramapo Catskill Library System |
| RCM | Red Cross Magazine |
| RCOLS | Regents Commission on Library Services |
| RCPL | Raleigh County Public Library |
| RCPL | Rancho Cucamonga Public Library |
| RCPL | Rapid City Public Library |
| RCPL | Redwood City Public Library |
| RCPL | Rockingham County Public Library |
| RCPL | Rowan County Public Library |
| RD | Reference Document |
| RDA | Resource Description Access |
| RDA | Resource Description & Access |
| RDL | Research Depository Library |
| RecMedVet | Recueil de Medecine Veterinaire |
| REDIC | Research Equipment Database in CERIF |
| REEL | Research Evidence in Education Library |
| REES | Russian and East European Studies |
| REFQ | reference question |
| REN | Research and Educational Network |