| Abbreviation | Definition |
|---|---|
| RIM | Remote Invocation of Methods |
| RIM | Repository Information Model |
| RIMS | Remote Information Management Services |
| RIN | Resource Identification Number |
| RINA | Reinforced Isotropic Network Adhesive |
| RIO | Remote Infrastructure Operation |
| RIP | Reconstituted Information Protocol |
| RIP | Remote Imaging Protocol |
| RIS | Remote Install Services |
| RIS | Remote Installation Service |
| RISF | Regional Information System Finland |
| RITA | Reliable Internetwork Troubleshooting Agent |
| RITN | Real-time Information Transfer and Networking |
| RJ45 | Registered Jack 45 |
| RJ-45 | 8-wire connector |
| RLA | Router Link Advertisement |
| RLFO | Raman Laser Fiber Optics |
| RLM | Redundant Link Manager |
| RLOF | Receive Loss Of Frame |
| RLP | Radio Link Protocol |