| Abbreviation | Definition |
|---|---|
| AAS | Associate in Applied Science |
| AAS | Associate of Applied Sciences |
| AASDT | Associate of Applied Science in Diesel Technology |
| AASET | Associate of Applied Science in Electrical Technology |
| AAV | AQIS Accredited Vet |
| AB | Acount Book |
| AB | Ars Bachelor |
| ABA | Associate in Business Administration |
| ABE | Agricultural and Biological Engineering |
| ABE | Agricultural Biological Engineering |
| Aberd. | Aberdeen (Aberdonensis) [Latin] |
| Aberd. | Aberdonensis (Aberdeen) [Lat.] |
| ABib | Associate of Bible |
| ABIM | American Board of Internal Medicine |
| ABS | Accelerated Bachelor of Science |
| ABS | Associate in Baccalaureate Studies |
| ABS | Associate in Business Science |
| ABS | Associate in Business Studies |
| ABT | All But Thesis |
| AC | Amplitude Clipper |