| Abbreviation | Definition |
|---|---|
| RSG | Reinsurance Systems Group |
| RSGBL | Riddhi Siddhi Gluco Biols, Ltd. (India) |
| RSH | RiverSide HealthCare Home |
| RSHC | Rivers of Steel Heritage Corporation |
| RSHL | Red Star Holdings Ltd |
| RSI | Race Services Incorporated |
| RSI | Recording Sound Industry |
| RSI | Refrigerated Specialist Inc |
| RSI | Refrigeration School Inc |
| RSI | Refrigeration Supply, Inc. |
| RSI | Residential Services Inc |
| RSI | Resource Services Incorporated |
| RSI | Resource Services, Inc. |
| RSI | Resource Services, Incorporated |
| RSI | Restaurant Services Inc |
| RSI | Restaurant Solutions Inc |
| RSI | Restoration Services Inc |
| RSI | Retail Solutions Inc |
| RSI | Rethink Solutions, Inc. |
| RSI | Revenue Solutions Inc |