| Abbreviation | Definition |
|---|---|
| RIDE | riding |
| RLTC | Riding Lights Theatre Company |
| RMBR | Riding Mountain Biosphere Reserve |
| ROMP | Riding On Military Pride |
| RRRR | Red River Roping and Riding |
| RSA | Riding School Assistant |
| RSQ | Riding Safety Qualified |
| SARI | Special Ability Riding Institute |
| SCRC | Southern Cruiser Riding Club |
| SERC | Scottish Endurance Riding Club |
| SHRC | Shadow Hills Riding Club |
| SIRA | Simple Innovative Riding Accessory |
| SMART | Sarasota Manatee Association for Riding Therapy |
| SOCO | Single Overriding Communication Objective |
| SOCO | Single Overriding Communications Objective |
| SPURS | Special People Using Riding Skills |
| SRB | Smooth Riding Bike |
| SRDA | South Riding Dance Academy |
| SRNC | Student Riding Nations Cup |
| SRS | The Spanish Riding Style |