| Abbreviation | Definition |
|---|---|
| RL | Relational Layout |
| RL | Roll |
| RLM | Relational Layout Model |
| RMA | Raw Material Assembly |
| RMB | Right Mouse Button |
| RMG | Renewable Manufacturing Gateway |
| RMI | Regional Manufacturing Institute |
| RMPL | Rapid Manufacturing and Prototyping Laboratory |
| RMS | Raw Material Surcharge |
| ROM | Rough Order of Magnitude |
| RPMI | Rapid Prototyping Manufacturing Institute |
| R-R | Range-Range |
| RRMC | Rapid Response Manufacturing Center |
| RSG | Rail-Supported Gantry |
| RSS | Root Sum Squared |
| RT | Rational Thermosoling |
| RTA | Reliability Test Assembly |
| RTAM | Rapid Technologies and Additive Manufacturing |
| RTD | Resistance Temperature Detector |
| RTE | Request To Engineering |