| CTTC | California Travel and Tourism Commission 
| Others |
| CTTC | California Turtle and Tortoise Club
| Others |
| CTTC | California Turtle Tortoise Club
| Others |
| CTTC | Canadian Toy Testing Council
| Others |
| CTTC | Carbondale Technology Transfer Center
| Others |
| CTTC | Cartridge Tape Transport Controller
| Others |
| CTTC | Center for Technology Transfer and Commercialization
| Others |
| CTTC | Central Texas Technology Center
| Others |
| CTTC | Central Texas Telephone Cooperative
| Others |
| CTTC | Central Texas Treatment Center
| Others |
| CTTC | Chapter Technology Transfer Committee
| Others |
| CTTC | Climb to the Clouds
| Others |
| CTTC | Coach Tourism and Transport Council
| Others |
| CTTC | Commercial Transportation Training Center
| Others |
| CTTC | Communications Technician (techical Branch) Chief Petty Officer
| Others |
| CTTC | Computer Technology Training Center
| Others |
| CTTC | Cryptologic (technical Branch) Chief Petty Officer
| Others |
| CTTC | Cuter Than The Cutest
| Others |