ADC
- ADC (gene)
- ADC Aircraft
- ADC Airlines
- ADC Map
- ADC Telecommunications
- ADC Theatre
- ADL/ADC class diesel multiple unit
- AIDS dementia complex
- Aboriginal Development Commission
- Acadia Divinity College
- Adlington (Cheshire) railway station
- Advanced Digital Corporation
- Advanced Direct Connect
- Aerospace Defense Command
- African Democratic Congress
- Aid to Dependent Children
- Aide-de-camp
- Air data computer
- Alliance for Democratic Change
- Allyl diglycol carbonate
- Alphonse Pyramus de Candolle
- American Deserters Committee
- American-Arab Anti-Discrimination Committee
- Analog-to-digital converter
- Andakombe Airport
- Andrew Dice Clay
- Android Developer Challenge
- Antibody-drug conjugate
- Apparent diffusion coefficient
- Apple Developer Connection
- Apple Display Connector
- Application delivery controller
- Arizona Department of Corrections
- Arkansas Department of Correction
- Art Directors Club of New York
- Ashfield District Council
- Asociación Democrática de Colima
- Australian Dance Council
- Australian Defence College
- Automated dispensing cabinet
- Automatic Data Capture
- Axiom of dependent choice
- Azodicarbonamide
- Daily cover
- Hong Kong Arts Development Council