| Abbreviation | Definition |
|---|---|
| ACL | Audit Command Language |
| ACM | Advanced Computer Modeling |
| ACM | Application Character Map |
| ACME | All Can Modify the Environment |
| ACMS | Atomic Controlfile Memory Service |
| ACMS | Automated Configuration Management System |
| ACNS | Automated Copyright Notice System |
| ACP | Administration Control Panel |
| ACP | Association of Computer Professionals |
| ACPC-99 | Fourth International Conference of the Austrian Center for Parallel Computation |
| ACPI | Advanced Configuration and Power Interface |
| ACR | Advanced Computational Research |
| ACR | Animated Computer Rendering |
| ACRC | Advisory Committee on Research Computing |
| ACRC | Architecture Computer Resource Center |
| ACRS | Automated Computer Response System |
| ACS | Active Chapter Size |
| ACS | Active Computer Speakers |
| ACS | Ada Compilation System |
| ACS | Antoniak Coding System |