| Acronym | Definition |
|---|
| ADA | American Diabetes Association |
| ADA | American Dental Association |
| ADA | Americans with Disabilities Act of 1990 (US) |
| Ada | [not an acronym] DoD Standard Computer Software Language named after Lady Ada Augusta Byron |
| ADA | American Dietetic Association |
| ADA | Average Daily Attendance |
| ADA | Adenosine Deaminase |
| ADA | Air Defense Artillery |
| ADA | Assistant District Attorney |
| ADA | Ausbildung der Ausbilder (German) |
| ADA | Americans for Democratic Action |
| ADA | Australian Dental Association |
| ADA | Age Discrimination Act of 1975 |
| ADA | Alternative Distribution Alliance |
| ADA | Aqua Design Amano (Niigata, Japan aquarium) |
| ADA | Audio Design Associates |
| ADA | Aeronautical Development Agency (India) |
| ADA | Anti-Deficiency Act (DoD Regulation 7000) |
| ADA | American Dairy Association |
| ADA | Arizona Department of Agriculture |
| ADA | Anti-Deficiency Act |
| AdA | Adipic Acid |
| ADA | Alberta Dental Association |
| ADA | American Decency Association |
| ADA | Afghan Development Association |
| ADA | Advisory Area |
| ADA | Advanced Data Analysis |
| ADA | American Dance Awards |
| ADA | Automatic Data Acquisition |
| ADA | Advanced Digital Audio (filename extension) |
| ADA | Amiga Demoscene Archive |
| ADA | Anxiety Disorders Alliance |
| ADA | Applied Decision Analysis |
| ADA | Air Defense Area |
| ADA | Action for Dysphasic Adults |
| ADA | Adana, Turkey - Adana (Airport Code) |
| ADA | Analog/Digital/Analog (audio CD format, recording/mixing/mastering) |
| ADA | After Date of Award |
| ADA | Anti-Drug Antibody |
| ADA | Atmospheric Decision Aid |
| ADA | Association of Disability Advocates |
| ADA | Annual Diocesan Appeal |
| ADA | Alberta Dressage Association (Canada) |
| ADA | Atomic Development Authority |
| ADA | Airborne Data Automation |
| ADA | Advanced Decision Architectures (US Army Research Labs) |
| ADA | Acetamidoiminodiacetic Acid |
| ADA | Add/Drop Amplifier (Pirelli) |
| ADA | Automatic Directory Assistance |
| ADA | Anti-Docking Alliance (UK) |
| ADA | Anti-Discrimination Association (Ulster) |
| ADA | Arbeitsgemeinschaft Dermatologische Angiologie |
| ADA | Australasian Desalination Association |
| ADA | All Disclaimers Apply |
| ADA | American Dance Asylum |
| ADA | Ancillary Data Access |
| ADA | Array Drive Assembly |
| ADA | Affiliated Data Center |
| ADA | Alamo Dressage Association |
| ADA | Actual Date of Arrival |
| ADA | Activity Discard Acknowledgment |
| ADA | Aviation Data and Analysis (system) |
| ADA | Alternate Delay Accumulation |
| ADA | Acquisition Decision Authority |
| ADA | Application Domain Authority |
| ADA | Air Defense Authority |
| ADA | Asociación de Derecho Ambiental (Spanish: Environmental Law Association) |
| ADA | Adult Diabetes Association |
| ADA | Adaptive Diagnosis Algorithm |
| ADA | Angus Dortmans Associates, Inc (Mississauga, ON, Canada) |
| ADA | American Defense Agency (fictitious organization in novel by Dylan Diggs) |
| ADA | Alaska Dressage Association, Inc. |
| ADA | Associate Director of Acquisition |
| ADA | Alternative Discipline Agreement |
| ADA | Automatic Delivery Alert |
| ADA | Advanced Delivery Alert |
| ADA | Analysis & Design of Algorithms |
| ADA | Alpha Dressage Association (Florida) |
| ADA | Arbeitsgemeinschaft Deutscher Aufbereitungs-Ingenieure (German: Treatment of German Engineers) |
| ADA | Agents Draft Authority |
| ADA | Alert Dispersal Area |
| ADA | Additional Drill Assemblies |
| ADA | Another Darn Acronym |
| ADA | Asymptotic Diophantine Approximation |
| ADA | Area Defense Administrator |
| ADA | Asynchronous Device Adapter |