| Acronym | Definition |
|---|
| ABAC | APEC (Asia Pacific Economic Conference) Business Advisory Council |
| ABAC | APEC (Asian-Pacific Economic Cooperation) Business Advisory Council |
| ABAC | Abraham Baldwin Agricultural College |
| ABAC | Anti-Bribery and Corruption (various organizations) |
| ABAC | Attribute Based Access Control |
| ABAC | American Board of Accredited Certifications |
| ABAC | Adaptive Binary Arithmetic Coding |
| ABAC | Antiquarian Booksellers Association of Canada |
| ABAC | Alcohol Beverages Advertising Code (Australia) |
| ABAC | Assumption Business Administration College (Bangkok, Thailand) |
| ABAC | Association of Balloon and Airship Constructors |
| ABAC | Aviation Boatswain's Mate Airship Rigger Chief Petty Officer (US Navy rank) |
| ABAC | Applied Behavior Analysis Graduate Certificate (George Mason University; Fairfax, VA) |
| ABAC | Associació de Buscadors Aurífers de Catalunya (Catalonian, Spain) |
| ABAC | Antonio Balma Air Compressors |