| Abbreviation | Definition |
|---|---|
| AA | Acquired Attributes |
| AAA | ASCII Adjust after Addition |
| AAAA | Academics Activities Assembly Advisory |
| AAD | Alter All Data |
| AAD | ASCII Adjust before Division |
| AAD | ASCII Adjust for Division |
| AAM | ASCII Adjust after Multiply |
| AAO | Add And Overflow |
| AAS | ASCII Adjust after Subtraction |
| AASC | Assembly of Agency Staff Committees |
| AASDA | Asante Akyem South District Assembly |
| AB | Always Blur |
| ABA | Add B To A |
| ABPA | Air Booster Pump Assembly |
| ABW | Array Bounds Write |
| AC | Align Centre |
| AC | Alternate Character |
| ACBL | Add Compare and Branch Longword |
| ACCF | Assembly of Christian Churches in Fiji |
| ACCP | Assembly Of Caribbean Community Parliamentarians |