| Abbreviation | Definition |
|---|---|
| RGPA | Rochester General Pediatric Associates |
| RH | Red Hat |
| RHL | Red Hat Linux |
| RHS | Right Hand Side |
| RIC | Request to Implement Change |
| RIDE | Recycled Information Display Extension |
| RIF | Random Important Files |
| RIFF | Raster Image File Format |
| RIGL | Rhode Island General Laws |
| RIL | RDF Inference Language |
| RIMM | RAMBUS In-line Memory Module |
| RIN | Record Identification Number |
| RIO | Radx Input Output |
| RIO | Random Access Memory Input Output |
| RIO | Remote Input Output |
| RIO | Resources Input Optimization |
| RIO | Riada Internet Objects |
| RIP | Rapid Implementation Plan |
| RIP | Raster Image Process |
| RIP | Raster Image Processing |