| Acronym | Definition |
|---|
| ATCA➣Alien Tort Claims Act |
| ATCA➣Adelaide Turf Cricket Association (Australia) |
| ATCA➣Advanced Telecom Computing Architecture |
| ATCA➣Advanced Telecom Computing Architecture (also AdvancedTCA) |
| ATCA➣Alaska Tobacco Control Alliance |
| ATCA➣Air Traffic Controllers Association |
| ATCA➣Antique Telephone Collectors Association |
| ATCA➣Airline Training Center Arizona (Phoenix, AZ) |
| ATCA➣Aisin Technical Center of America (Northville, MI) |
| ATCA➣Advanced Tanker Cargo Aircraft |
| ATCA➣Allied Tactical Communications Agency |
| ATCA➣Australian Telescope Compact Array |
| ATCA➣Air Traffic Control Assistant |
| ATCA➣Airedale Terrier Club of America, Inc. |
| ATCA➣Advance Thin Capitalisation Agreement (UK) |
| ATCA➣Airedale Terrier Club Argentino (Brazil) |
| ATCA➣Alarm Threshold Crossing Alert |
| ATCA➣American Telephone Collectors Association (University of Michigan) |