ADN

Technology

• Application Delivery Network, a suite of technologies for improved delivery of applications across the Internet
• Aircraft Data Network, a proposed network standard for commercial aircraft installations
• App.net, an online social networking service
• Digital Negative (file format), a raw image format designed by Adobe Systems

Science

• Ammonium dinitramide, a rocket propellant
• DNA
• Auditory Disability with Normal hearing, a term for King-Kopetzky syndrome

Politics

• Nationalist Democratic Action (Spanish: Acción Democrática Nacionalista), a political party of Bolivia
• National Democratic Alliance (Italy) (Italian: Alleanza Democratica Nazionale), a former political party of Italy

Media

• ADN (newspaper), a Spanish free daily newspaper
• Allgemeiner Deutscher Nachrichtendienst, the state news agency of East Germany
• Alaska Dispatch News (formerly Anchorage Daily News), an Alaskan newspaper

Education

• Associate Degree in Nursing, similar to Associate of Science in Nursing
• A common term for the student section of Athens Drive High School

Other uses

• Abbreviated dialing number
• ADN , the stock symbol of Aberdeen Asset Management
• Adang language, a Trans-New Guinea language of Indonesia
• Ardrossan Town railway station, United Kingdom
• Ashley, Drew and Northern Railway, a defunct railroad in Arkansas
• Andes Airport in Andes, Antioquia, Colombia