| CATC | Capital Area Technical Center 
| Others |
| CATC | Capital Area Transportation Coalition
| Others |
| CATC | Casper Area Transportation Coalition
| Others |
| CATC | Catccomputer Access Technology Corporation
| Others |
| CATC | Center for Advanced Technology Careers
| Others |
| CATC | Center for Aquaculture Technologies Canada
| Others |
| CATC | Central Arkansas Telephone Cooperative
| Others |
| CATC | Certified Addiction Treatment Counselor
| Others |
| CATC | Certified Addictions Treatment Counselor
| Others |
| CATC | Certiport Authorized Testing Center
| Others |
| CATC | Chicago Analytic Trading Company
| Others |
| CATC | Children's Activity Tax Credit
| Others |
| CATC | China Automotive Testing Cycle
| Others |
| CATC | Chongqing Automobile Test Center
| Others |
| CATC | Christ at the Checkpoint
| Others |
| CATC | Church at the Cross
| Others |
| CATC | Cincinnati Arts and Technology Center
| Others |
| CATC | Civil Aviation Training Center
| Others |
| CATC | Clean Air Technology Center
| Others |
| CATC | College Access Tax Credit
| Others |
| CATC | College Affordability and Transparency Center
| Others |
| CATC | Colorado Assessment and Treatment Center
| Others |
| CATC | Combined Annual Training Camp
| Military, Education |
| CATC | Common ASEAN Tourism Curriculum
| Others |
| CATC | Computer Access Technology Corporation
| Others |
| CATC | Computer Aided Tolerance Control
| Others |
| CATC | Crisis and Treatment Center
| Others |
| CATC | Crisis Assessment and Treatment Center
| Others |