| Acronym | Definition |
|---|
| AAD | Australian Antarctic Division (Australia's Antarctic program) |
| AAD | American Academy of Dermatology |
| AAD | Access to Archival Databases (US NARA) |
| AAD | Automatic Activation Device |
| AAD | Antibiotic-Associated Diarrhea |
| AAD | Additional Authenticated Data (WPA-CCMP encryption) |
| AAD | Armed and Dangerous (video game) |
| AAD | Arbeids- og Administrasjonsdepartementet (Norwegian: Ministry of Labour and Government Administration) |
| AAD | Advanced Agility Dog (dog agility title) |
| AAD | Anti-Arrhythmic Drugs |
| AAD | Advanced Air Defense (missile intercept system) |
| AAD | Argumentation et Analyse du Discours (French: Argumentation and Discourse Analysis) |
| AAD | American Annals of the Deaf |
| AAD | Assistant Athletic Director |
| AAD | Army Air Defense |
| AAD | Air Assault Division |
| AAD | Analog Analog Digital (audio CD recording format, recording/mixing/mastering) |
| AAD | Advanced Academic Degree |
| AAD | Advanced Animal Diagnostics |
| AAD | Annual Aggregate Deductible (insurance) |
| AAD | Area Air Defence |
| AAD | Automotive Analysis Division (University of Michigan) |
| AAD | Assigned Altitude Deviation |
| AAD | Alabama Association of the Deaf |
| AAD | Aide et Assistance à Domicile (French: Home Help and Support) |
| AAD | Archive of Art and Design |
| AAD | Analog Alignment Diskette |
| AAD | Associate Art Director |
| AAD | Authorized AutoCAD Dealer |
| AAD | Advanced Ammunition Depot |
| AAD | Automated Application Development (software development) |
| AAD | Angolan Action for Development (Angola) |
| AAD | Admission And Disposition |
| AAD | Affirmative Action Division (various local governments) |
| Aad | Alpha-Aminoadipic Acid |
| AAD | Austin Association of the Deaf (Texas) |
| AAD | Attitude Anomaly Detector |
| AAD | American Academy of Denturity |
| AAD | Alaska Association of the Deaf |
| AAD | Appeals Arbitration Division (ICAS) |
| AAD | Advanced Access and Disablement |
| AAD | Arkansas Association of the Deaf, Inc. |
| AAD | Access Approval Document |
| AAD | Automatic Actuation Device |
| AAD | Aircraft Armament Division |
| AAD | Allgemeiner Anlagedienst |
| AAD | Automatic Adaptive Detection |
| AAD | Acronym/Abbreviation Definition |
| AAD | Airborne Assault Division |
| AAD | Allowance Appendix Documentation |
| AAD | All About Dollars |
| AAD | Armoured Amphibious Dozer |
| AAD | Acquisition Activities Division |
| AAD | Additive Accumulative of Damages |
| AAD | Advanced Alloy Development |
| AAD | Advanced Alloy Duct (test) |
| AAD | Advanced Acoustic Decoy |
| AAD | Atomic Absorption Detector |
| AAD | Army Automation Directorate |
| AAD | Analysis & Application Division |
| AAD | American Academy of Diplomacy (est. 1983; Washington, DC) |
| AAD | Aviation Accident Database (US NTSB) |
| AAD | Average Absolute Deviation |
| AAD | Assistant Area Director (various locations) |