| Abbreviation | Definition |
|---|---|
| CTDF | Club Timbradista De la Florida |
| CTFC | Cheltenham Town Football Club |
| CTFC | Crawley Town Football Club |
| CTFS | Club des Tireurs Fosse et Skeet |
| CTGC | Cuenca Tenis y Golf Club |
| CTH | Chapo Trap House |
| CTLB | Club Team Lotus Belgium |
| CTNE | Club Telex Noise Ensemble |
| CTOC | City of Trees Orienteering Club |
| CTOH | Classic Thunderbirds of Houston |
| CTOL | Club Taurino of London |
| CTPC | Cornish Traction Preservation Club |
| CTPN | Club de Tir Provence Nemrod |
| CTTC | California Turtle and Tortoise Club |
| CTTC | California Turtle Tortoise Club |
| CTTD | Club de Tennis de Table de Dammartin |
| CTTD | Club Toujours Tout Droit |
| CTW | VIT University - Cool the World |
| CUAC | Cambridge University Automobile Club |
| CUBC | Cambridge University Boat Club |