Americans with Disabilities Act 
Air Defense Artillery 
American Dental Association 
American Diabetes Association 
American Dietetic Association 
advisory area 
Aeronautical Development Agency 
air defense area 
Americans with Disability Act 
Automatic Data Acquisition 
adenosine deaminase 
Air Defence Artillery 
American Disabilities Act 
American with Disabilities Act 
Automatic Data Acquisitions 
Acquisition Decision Authority 
ADA Lovelace Language 
adipic acid 
Adobe Developers Association 
Air Data Assembly 
Air Defence Area 
Airborne Data Automation 
American Dairy Association 
American Desalting Association 
Ancillary Data Access 
Anti-Deficiency Act 
Anti-Discrimination Association 
Array Drive Assembly 
Audio Distribution Amplifier 
Authorization Decision Assertion