| Abbreviation | Definition |
|---|---|
| TCYDA | Tulsa Chess and Youth Development Association |
| TN | Theoretical Novelty |
| TNSCA | Tamil Nadu State Chess Association |
| TWIC | The Week In Chess |
| UCA | Utah Chess Association |
| UPSCL | Unofficial Peninsula Scholastic Chess League |
| USACF | United States of America Chess Federation |
| USCA | United States Chess Academy |
| USCCF | United States Chess Center Foundation |
| USCF | United State Chess Federation |
| USCF | United States Chess Federation |
| USCF | Utah Scholastic Chess Foundation |
| USCFRS | United States Chess Federation Rating System |
| USCL | United States Chess Live |
| USCT | Unites States Chess Trust |
| VCCBC | Vigo County Chess Boosters Club |
| VCF | Virginia Chess Federation |
| VSCA | Virginia Scholastic Chess Association |
| WAC | Win At Chess |
| WACC | World Amateur Chess Championship |