| Abbreviation | Definition |
|---|---|
| ATEES | Advanced Technologies in Electrical and Electronics Systems |
| ATHC | Australasian Tropical Health Conference |
| ATM | After The Meeting |
| ATMC | Advances in Tourism Marketing Conference |
| ATS | Asian Test Symposium |
| AUBC | Atlantic University Basketball Conference |
| AUDC | Abila User Developer Conference |
| AUGC | Atlantic Universities Geological Conference |
| AUGC | Atlantic Universities Geoscience Conference |
| AUTEST | AUtomatic Support Systems Symposium for Advanced Maintainability Conference Record |
| AUV | Symposium on Autonomous Underwater Vehicle Technology |
| AVAYA | American Veterans are Yankee Advocates |
| AVCC | Americas Venture Capital Conference |
| AVCC | America's Venture Capital Conference |
| AVHC | Australasian Viral Hepatitis Conference |
| AVPC | Association of Visual Pedagogy Conference |
| AVPC | Australasian Vertebrate Pest Conference |
| AVRS | Aortic Valve Repair Summit |
| AWCH | Association of Welfare for Child Health |
| AWCH | Association of Welfare of Child Health |