| Acronym | Definition |
|---|
| ATCI➣Antenna Technology Communications, Inc. (Chandler, AZ) |
| ATCI➣Association of Thai Computer Industry (Thailand) |
| ATCI➣Albany Transcomm International |
| ATCI➣Air Traffic Control Instruction |
| ATCI➣Advanced Technology Consulting, Inc. (Greenwood Village, CO) |
| ATCI➣Acute Transitory Coronary Insufficiency (heart function) |