| Abbreviation | Definition |
|---|---|
| STAR | Skills And Techniques For Advanced Riding |
| SUARC | The Stratford upon Avon Riding Club |
| SVRC | Sierra Vista Riding Club |
| SWS | Speed With Style |
| TADRA | The Australian Distance Riding Association |
| TMO | Trail Management Objectives |
| TOYOTA | Take On Your Off-road trail atlast! |
| TPBR | Territorial Professional Bull Riding |
| TRACC | Therapeutic Riding Activities in Chittenden County |
| TREC | Therapeutic Riding Equestrian Center |
| TREC | Therapeutic Riding of Erie County |
| TREK | Trail Riding Equestrians in Kentucky |
| TRIBE | Trail Riding In Barren Environments |
| TROT | Therapeutic Riding Of Tri |
| TROT | Therapeutic Riding Of Tryon |
| TROT | Therapeutic Riding Of Tucson |
| TROT | Therapeutic Riding On Thoroughbreds |
| TROT | Trail Riding Of Today |
| TTRC | Tech Therapeutic Riding Center |
| TTRC | Tip Top Riding Club |