| Abbreviation | Definition |
|---|---|
| RSR | Remote Sensing Research, Inc. |
| RSR | Rodeo Stock Registry of North America |
| RSR | Rotordynamics- Seal Research |
| RSS | Red Sound Systems |
| RSSC | Randolph Southern School Corporation |
| RSSI | Radiation Safety Services, Inc. |
| RSSI | Railway Systems Suppliers, Inc. |
| RSSI | Robotic Security Systems, Inc. |
| RSSL | Reading Scientific Services Ltd |
| RSSL | Reading Scientific Services Ltd. |
| RST | Reliable Software Technologies |
| RSTC | Residential Sewage Treatment Company |
| RSTI | Rofin Sinar Tech Inc |
| RSTI | Rofin Sinar Technologies Inc |
| RSVI | Relative Stem Volume Increment |
| RSW | RobertShaW |
| RSY | Rapier Ship Yard |
| RSZ | Rogers Technologies Suzhou Company, Ltd. |
| RT | Red Top Cab Company |
| RT | Robinson Technologies |