| Abbreviation | Definition |
|---|---|
| RP | Riemannian Polyeder |
| RPD | Reactor Physics Division |
| RPG | Rate Per Generation |
| RPKA | Reaction Progress Kinetic Analysis |
| RPM | Radial Pressure Management |
| rpm | revoluation per minute |
| RPN | Remote Plasma Nitridation |
| RPS | Rotations Per Second |
| RPSS | Resonance Peak Spectral Splitting |
| RPT | Rapid-Phase Transformation |
| RPT | Reference Point Tracking |
| RPT | Refractory Period of Transmission |
| RPT | Reverse Polarization Transfer |
| RPV | Reactor Pressure Vessel |
| RR | Random Reflected |
| RR | Reverse Rotation |
| RRDP | Recent Research Development in Physics |
| RRV | Record Relocation Vector |
| RS | Resample Scheme |
| RS | Resonance Strength |