| Abbreviation | Definition |
|---|---|
| ABS | Amman Baccalaureate School |
| ABS | Anti Bullying Strategies |
| ABS | Anti-lock Breaking System |
| ABSE | Adult Basic and Secondary Education |
| ABSE | Adult Basic Secondary Education |
| ABT | American Ballet Theatre |
| ABTA | All Bengal Teachers Association |
| ABTA | American Bridge Teachers' Association |
| ABTE | Advisory Board of Teacher Education |
| ABWOL | A Better Way of Learning |
| AC | Applied Communication |
| AC | Area Consultant |
| AC | Attendance Completed |
| ACA | Alberta College of Art (part of SAIT and prior to 1960 part of PITA) |
| ACAP | Accounting Careers Awareness Program |
| ACAPA | Attendance / Child Accounting Professional Association of Pennsylvania |
| ACAT | Area Concentration Achievement Tests |
| ACAT | Asian Coalition Against Tobacco |
| ACB | Academic Challenge Bowl |
| ACC | Academic Computer Club |