- AAN stands for American Academy of Neurology
- AAN stands for American Academy of Nursing
- AAN stands for Association of Alternative Newsweeklies
- AAN stands for Army After Next
- AAN stands for American Association of Nurserymen
- AAN stands for Archaeological Association of Nigeria
- AAN stands for Australian Association of Neurologists
- AAN stands for Action Alert Network (International Freedom of Expression Exchange)
- AAN stands for Annuaire de l’Afrique du Nord (French: North African Directory; publication)
- AAN stands for Agency Action Notice (document)
- AAN stands for All Area Network
- AAN stands for All About Nothing (gaming)
- AAN stands for American Academy of Nutrition
- AAN stands for Application-Aware Network (AT&T)
- AAN stands for Air Ambulance Network
- AAN stands for Active Antenna Node
- AAN stands for Asemblea Atlantico del Nord (North Atlantic Assembly; NATO)
- AAN stands for Activity Accounting Number
- AAN stands for Assignment Action Number (US Air Force)
- AAN stands for AIDS-Acquired Immune Deficiency Syndrome Associated Neutropenia
AAN