| Abbreviation | Definition |
|---|---|
| ACRE | Arch Centre For Renewable Energy |
| ACRE | Audio Composition Research Environment |
| ACRH | Academic Complex Recital Hall |
| ACRI | Advanced Computer Research Institute |
| ACRI | Advanced Computing Research Institute |
| ACRI | Australian Cotton Research Institute |
| ACRK | ACademic RanK |
| ACRL | Advanced Computational Research Library |
| ACRN | All Campus Radio Network |
| ACRU | Association of Carpathian Region Universities |
| ACS | Academic Computing Service |
| ACS | Advanced Competitive Science |
| ACS | All Cannot Study |
| ACS | American Campus Subscriptions |
| ACSA | American Computer Scientists Association |
| ACSE | Advanced Computing for Science Education |
| ACSES | Alberta Centre for Surface Engineering and Science |
| ACSL | American Computer Science League |
| ACSR | Australian Centre for Security Research |
| ACST | American Cooperative School of Tunis |