ADN

• Aircraft Data Network, a proposed network standard for commercial aircraft installations
• IATA airport code for Andes Airport in Antioquia Department, Colombia

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

• ADN (newspaper), a Spanish free daily newspaper
• ADN Radio Chile, a Chilean Radio station
• ADN, the original French title of DNA, a 2020 drama film
• {{lang|de|Allgemeiner Deutscher Nachrichtendienst}}, the state news agency of East Germany
• Anchorage Daily News, an Alaskan newspaper

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

• Adiponitrile
• Ammonium dinitramide, a rocket propellant
• Auditory Disability with Normal hearing, a term for King-Kopetzky syndrome
• DNA, as abbreviated in various languages (particularly Romance languages such as Spanish and French)

• Abbreviated Dialing Numbers, two or three digits sequence to reach specific telephone numbers, such as those of public services
• Application Delivery Network, a suite of technologies for improved delivery of applications across the Internet
• App.net, an online social networking service
• Digital Negative (file format), a raw image format designed by Adobe Systems

• Abbreviated dialing number
• Adang language, a Trans-New Guinea language of Indonesia
• ADN, the stock symbol of Aberdeen Asset Management
• Ardrossan Town railway station, UK
• Ashley, Drew and Northern Railway, a defunct railroad in Arkansas
• European Agreement concerning the International Carriage of Dangerous Goods by Inland Waterways, part of the UN Recommendations on the Transport of Dangerous Goods

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