Abbreviated Dialing Number (SAUS)
Accession Designation Number - Military
Accion Democratica Nacionalista - Nationalist Democratic Action - Bolivia - Political party (PPW)
Accion Democratico Nacional - National Democratic Action - Aruba - Political party (EY)
Actual Device Number (SAUS)
Adams - New York - Seismograph station code, US Geological Survey - Closed (SEIS)
Adanac Mining & Exploration Ltd. - Toronto Stock Exchange symbol - Vancouver Stock Exchange symbol
Adang - Language code (ETLW)
Add In Utility (SAUS)
Addition - Telegraphy (PCTE)
Additional Directory Number - Telecommunications (ACOL)
Address Complete, No-Charge - Telecommunications (TEL)
Aden - People's Democratic Republic of Yemen
Adenine (SAUS)
Adiponitrile - Organic chemistry
Advanced Digital Network - Computer science (IGQR)
Aerodienst GmbH - Germany - ICAO designator (FAAC)
AgriData Network - AgriData Resources, Inc. - Milwaukee, WI - Telecommunications service (TSSD)
Aguirre Design Network, Inc. - Commercial firm
Alden Yachts, Portsmouth, RI - Manufacturer code for watercraft hull identification number (USCG)
Allgemeiner Deutscher Nachrichtendienst - German General News Service - Germany (EG)
Ammonium Dinitramide - Potential rocket fuel component - Inorganic chemistry
Antideoxyribonuclease - Medicine (DMAA)
Any Day Now (ADWA)
Aortic Depressor Nerve - Medicine (DB)
Archdeacon
Ashley, Drew & Northern Railway Co. - AAR code
Assistant Director of Nursing (BARN)
Associate Degree in Nursing
Automatic Data Network
Avionics Decision Notice (MCD)
Aydin - Turkey - Airport symbol (AD)
Adenoid - Otorhinolaryngology (DAVI)
Adenoidectomy - Otorhinolaryngology (DAVI)