ADA

ADA may refer to:

Politics and government

Aeronautical Development Agency, agency of India's Ministry of Defence
Air Defense Artillery Branch (United States Army)
Amazon Development Agency, development agency in Brazil
American Decency Association, American political organization advocating against pornography and "indecent" media
Americans for Democratic Action, American liberal political advocacy organization
Americans with Disabilities Act of 1990, U.S. law that prohibits discrimination on the basis of disability
Amigos dos Amigos, drug cartel in the favelas of Rio de Janeiro
Angehöriger der Armee, or AdA, member of the Swiss Armed Forces
Anti-Deficiency Act, U.S. law that prohibits the federal government from incurring debts not authorized by Congress
Armée de l'Air or AdA, the French Air Force
Assistant District Attorney, US government attorney position

Austrian Development Agency, development aid agency
Australian Digital Alliance, copyright advocacy group
Association of Drainage Authorities, membership body for those involved in water level management in the United Kingdom
ADA...A Way of Life, 2008 Bollywood musical by Tanvir Ahmed
Alternative Distribution Alliance, music distributor owned by Warner Music Group
ADA collider, the first electron–positron collider
Adenosine deaminase enzyme
Analog-to-digital converter/Digital-to-analog converter, seen as ADA or A/DA, conversion occurring in some electronic devices, often musical
Adangme language's ISO 639-2 code
Advanced Distribution Automation, the extension of intelligent control over an electrical power grid
After the Development of Agriculture, A.D.A., system of counting years, like Anno Domini and Anno Mundi
Azodicarbonamide, a food additive also used in plastics production
Apple Design Awards
Aerolínea de Antioquia, Colombian Airline
Airline Deregulation Act, 1978 US bill removing governmental control from commercial aviation
Adana Şakirpaşa Airport's IATA code