| Abbreviation | Definition |
|---|---|
| ASP | All Systems Panic |
| ASR | Arithmetic Shift Right |
| ASS | Activate Symmetrical Sign |
| ASSM | ASSeMbly Language |
| ASYA | Agusan Surigao Youth Assembly |
| ATAA | Assembly of Turkish American Associations |
| ATE | Ascii To Ebcdic |
| ATPO | Assembly Test Process Order |
| ATR | Answer To Reset |
| ATS | At Title Screen |
| ATTD | Assembly Test Technology Development |
| ATWAP | Abolish The Welsh Assembly Party |
| AUB | Assemble Usenet Binaries |
| AVA | Attribute Value Assertion |
| AVA | Automated Visual Assembly |
| AVYD | Assembly of Vietnamese Youth for Democracy |
| AWI | Assembly Work Instruction |
| AWP | Argue With Programmer |
| BA | Bean Assembler |
| BAA | Board on Agriculture Assembly |