| CTCC | Cairn Terrier Club of Canada 
| Others |
| CTCC | Calgary Telus Convention Centre
| Others |
| CTCC | Campaign for the Traditional Cathedral Choir
| Others |
| CTCC | Canadian Touring Car Championship
| Others |
| CTCC | Central Texas Commercial College
| Others |
| CTCC | Central Texas Corvette Club
| Others |
| CTCC | Centre for Theoretical and Computational Chemistry
| Others |
| CTCC | China Touring Car Championship
| Others |
| CTCC | Classic Thunderbird Club of Chicagoland
| Others |
| CTCC | Clinical Trials Coordinating Centre
| Others |
| CTCC | Clinical Trials Coordination Center
| Others |
| CTCC | Colorado Technical Conference Center
| Others |
| CTCC | Colville Tribal Convalescent Center
| Others |
| CTCC | Combined Torana Car Club
| Others |
| CTCC | Controlled Torque Converter Clutch
| Others |
| CTCC | Cranberry Township Community Chest
| Others |
| CTCC | Creative Traditional Companies Cooperation
| Others |
| CTCC | CUFR Tree Carbon Calculator
| Others |
| CTCC | Cummins Technical Center Charleston
| Others |