| Abbreviation | Definition |
|---|---|
| AARP | Appletalk Address Resolution Protocol |
| AB | Accessed By |
| AB | Apache Bench |
| ABAN | Agent-Based Active Network |
| ABBA | Automated Biomass Burning Algorithm |
| ABCU | Agent Based Controller Unit |
| ABFS | A/B Fallback Switch |
| ABM | Answer Back Message |
| ABP | Active Back Panel |
| ABTP | Address Book Transport Protocol |
| ACA | Address Control Application |
| ACAP | Automated Content Access Protocol |
| ACE | Access Collaboration Equity |
| ACE | Access Control Entry |
| ACE | Adaptive Communication Environment |
| ACE | Address Correction and Encoding |
| ACES | Access Certificates For Electronic Services |
| ACF | Advanced Communications Function |
| ACG | Amazing Code Generator |
| ACG | Auto Content Generator |