| Acronym | Definition |
|---|
| AAC | Advanced Audio Coding |
| AAC | Alaska Administrative Code |
| AAC | Augmentative and Alternative Communication (journal) |
| AAC | Antimicrobial Agents and Chemotherapy (journal) |
| AAC | Agriculture et Agroalimentaire Canada (Agriculture and Agri-Food Canada, aka AAFC) |
| AAC | Association of American Colleges |
| AAC | American Airlines Center (Dallas, TX sports venue) |
| AAC | American Anglican Council |
| AAC | Autoclaved Aerated Concrete |
| AAC | Army Air Corps (British) |
| AAC | American Alpine Club (Golden, Colorado USA) |
| AAC | Annual Allowable Cut (forestry) |
| AAC | Air Armament Center (USAF) |
| AAC | Australian Army Cadets |
| AAC | Army Acquisition Corps |
| AAC | Associação Académica de Coimbra (student organization) |
| AAC | Agility Association of Canada |
| AAC | Aquaculture Association of Canada |
| AAC | Anti-Aircraft |
| AAC | Activity Address Code |
| AAC | American Adoption Congress |
| AAC | Association for Assessment in Counseling |
| AAC | Advanced Audio Compression |
| AAC | Audiology Awareness Campaign |
| AAC | Advance Audio Coding |
| AAC | Alaskan Air Command |
| AAC | Academy of Art College (San Francisco, CA) |
| AAC | Agricultural Advisory Committee (Florida) |
| AAC | AIDS Action Council |
| AAC | Actual Acquisition Cost |
| AAC | Arctic Athabaskan Council (Canada) |
| AAC | Atlanta Area Council (Boy Scouts of America) |
| AAC | Antibiotic-Associated-Colitis |
| AAC | Apple Audio Codec (common, but incorrect) |
| AAC | Acquisition Advice Code |
| AAC | Action Alliance for Children |
| AAC | Aluminum Anodizers Council |
| AAC | Army Accessions Command |
| AAC | Atlanta Athletic Club |
| AAC | Alternative or Augmentative Communication |
| AAC | Auxiliary Air Control |
| AAC | All Aluminum Conductor (type of cable) |
| AAC | Art Academy of Cincinnati |
| AAC | Automatic Amplitude Control |
| AAC | All African Convention |
| AAC | Authorization and Access Control |
| AAC | Appoint A Committee |
| AAC | Austrian Association of Cinematographers |
| AAC | Accurate Automation Corporation |
| AAC | Assistant Area Commissioner (UK scouting) |
| AAC | Aluminum Alloy Conductor (type of cable) |
| AAC | Automotive Applications Committee (American Iron and Steel Institute) |
| AAC | Aeronautical Administrative Communication (MITRE) |
| AAC | Australian Agricultural Council |
| AAC | Airline Administrative Communications |
| AAC | Arizona Alzheimer's Consortium (Phoenix, AZ) |
| AAC | Affiliated Acceptance Corporation |
| AAC | Arlington Aquatic Club (Virginia, USA) |
| AAC | Adaptive Arithmetic Coding |
| AAC | Acceptable Ambient Concentration |
| AAC | Army Aviation Center (Fort Rucker, Alabama) |
| AAC | Advanced Analytical Centre (James Cook University, Australia) |
| AAC | Architecture Advisory Committee |
| AAC | Assignment Availability Code |
| AAC | Mike Monroney Aeronautical Center |
| AAC | Advanced Airspace Concept |
| AAC | Area Above the Curve |
| AAC | Albany Anthrocon |
| AAC | Associação Academica Coimbra (Portugal) |
| AAC | Alkyl Ammonium Compound |
| AAC | African-American Council |
| AAC | Assessment Accommodations Checklist (education) |
| AAC | Acculink Access Controller (AT&T) |
| AAC | Average Acquisition Cost |
| AAC | Air Ambulance Company |
| AAC | Air Agency Certificate |
| AAC | Automated Accounting System |
| AAC | Anno Ante Christum (Latin: In the Year Before Christ) |
| AAC | Antiaircraft Common (Ammunition) |
| AAC | Alachua Astronomy Club, Inc (Gainesville, FL) |
| AAC | Automatic Aperture Control |
| AAC | Aviation Armament Change |
| AAC | Aerial Ambulance Company |
| AAC | Autonomous Activation Condition |
| AAC | Automatic Approach Control |
| AAC | Association of Asian Communicators |
| AAC | Asian Athletics Championships |
| AAC | Armament Accuracy Check |
| AAC | Applicant Assistance Center (DHS/FEMA) |
| AAC | Accordion Association of Calgary |
| AAC | Automatic Attenuation Control (analog devices) |
| AAC | Abnormal Accruals (accounting) |
| AAC | Apiary Advisory Committee (Washington State Beekeepers Association) |
| AAC | Alberta Aviation Council (Canada) |
| AAC | Anesthesia Awareness Campaign, Inc (Reston, VA) |
| AAC | Academic Advisory Center |
| AAC | Association of Airline Consolidators (UK) |
| AAC | Actual Audible Chuckle (chat) |
| AAC | Airborne Activity Confinement |
| AAC | Adaptive Antenna Control |
| AAC | Aeronautics Advisory Council |
| AAC | Account Activity Code |
| AAC | Aircraft Armament Change |
| AAC | Airborne Aircraft Controller |
| AAC | Advanced AERA Concepts |
| AAC | Adjusted Asphalt Content |
| AAC | ADC Access Concentrator (Kentrox) |
| AAC | Advanced Airborne Course |
| AAC | Alain Amghar Consultants |
| AAC | Asset Alliance Corporation Sdn Bhd (Kuala, Lumpur) |
| AAC | Allegheny Athletic Club (basketball club) |