| Abbreviation | Definition |
|---|---|
| RFIC | Radio Frequency Integrated Circuit |
| RFT | Repeat Formation Tester |
| RGP | Residential Gateway Platform |
| RH | Restoration Hardware |
| RHA | Rectangular Hybrid Automaton |
| RHI | Render Hardware Interface |
| RHI | Rendering Hardware Interface |
| RHP | Reconfigurable Hardware Product |
| RHSC | Refrigeration Hardware Supply Corp |
| RIBS | Reston Internal Bus System |
| RIC | Reuters Instrument Code |
| RIHD | Remote Interactive over HDMI |
| RIMM | Research in motion module |
| RIMS | Removable Interlocking Media Storage |
| RIO | RAM (Random Access Memory) Input/ Output |
| RIS | Robotics Invention System |
| RIU | Relay Interface Unit |
| RIUP | Remove Insert Under Power |
| RJ-11 | Registered Jack type 11 (4-wire connector) |
| RJ-45 | Registered Jack type 45 (8-wire connector) |