| Abbreviation | Definition |
|---|---|
| ACAG | Australasian Council of Auditors General |
| ACB | Access method Control Block |
| ACCESS | All Campus Computing Environment Support System |
| ACCI | Academic Cloud Computing Initiative |
| ACCS | Automatic Computer Cutting System |
| ACDP | Automated CD Data Processing |
| ACDS | Active Control Data Set |
| ACE | Access, Collaboration, and Equity |
| ACE | Advanced Collaborative Environment |
| ACE | Advanced Computing Environment [obsolete] |
| ACE | Asynchronous Communications Element |
| ACE | Automatic Computing Engine |
| ACER | A Computer Entrepreneurial Revolution |
| ACF | Advanced Communication Facility |
| ACGM | Annual Conference and General Meeting |
| ACI | Annotated Cached Information |
| ACI | Artificial Cybernetic Intelligence |
| ACIA | Asynchronous Communications Interface Adapter |
| ACID | Automation, Consolidation, Internationalization, and Diversification |
| ACIP | Architectures for Cognitive Information Processing |