| Abbreviation | Definition |
|---|---|
| AAVSB | American Association of Veterinary State Boards |
| AAWC | Airport Authority of Washoe County |
| AAWWTP | Ann Arbor Waste Water Treatment Plant |
| AB | AlBerta |
| ABAG | Association of Bay Area Governments |
| ABBS | Antigua and Barbuda Bureau of Standards |
| ABC | Alabama Beverage Control |
| ABCC | Alcohol Beverages Control Commission |
| ABCC | Alcoholic Beverages Control Commission |
| ABCHS | American Board for Certification in Homeland Security |
| ABFO | Area Budget and Fiscal Office |
| ABIP | Advisory Board of Interested Parties |
| ABLES | American Board of Lower Extremity Surgery |
| ABMT | Australia's Biggest Morning Tea |
| ABRF | Alabama Board of Registration for Foresters |
| AC | Albany County |
| AC | Amherst County |
| ACACC | Adams County Adult Correctional Complex |
| ACAPS | Assessment Committee Application Processing System (Virginia) |
| ACAT | Aged Care Assessment Team |