| Abbreviation | Definition |
|---|---|
| CTOA | Chinese Tractor Owners Association |
| CTPA | Cascade Team Penning Association |
| CTPA | Connecticut Tree Protective Association |
| CTPA | Cosmetic Toiletry and Perfumery Association |
| CTRA | Canadian Therapeutic Recreation Association |
| CTSA | Central Texas Silueta Association |
| CTTA | Calaveras Timber Trails Association |
| CTTA | California Tow Truck Association |
| CTTA | Canterbury Time Trial Association |
| CTTA | Central Texas Tennis Association |
| CTTA | Central Texas Trials Association |
| CTTA | Cheltenham Table Tennis Association |
| CTTA | Chinese Table Tennis Association |
| CTTA | Chinese Taipei Triathlon Association |
| CTTA | Coonoor Tea Trade Association |
| CUAJ | Canadian Urological Association Journal |
| CUDA | Credit Union Development Association |
| CUFA | Cranford Ultimate Frisbee Association |
| CUHA | Canadian Unlimited Hydroplane Association |
| CUMA | Credit Union Mortgage Association |