| Abbreviation | Definition |
|---|---|
| ATSU | Apple Type Services for Unicode |
| ATSUI | Apple Type Services for Unicode Imaging |
| ATT | ASCII Transformation Table |
| AUC | Apache Utility Classes |
| AUI | Abstract User Interface |
| AUR | Advanced Users Reference |
| AUR | Arch User Repository |
| AURA | Automated Underwriting And Rating Application |
| AURA | Automated Underwriting and Risk Analysis |
| AUSTIN | Astonishing Universal Search Tree Interface Novelty |
| AUT | Application Under Test |
| AUT | Avalon Utility Toolkit |
| AutoML | Automated Machine Learning |
| AV | Acrobat Viewer |
| AV | Anti Virus |
| AV | Aspect View |
| AV | Authorized Version |
| AVCC | Alternative Version Concurrency Control |
| AVE | Ariadne's Visualization Engine |
| AVE | Ariadne's Visualization Environment |