ASO

ASO or Aso may refer to:


 * Aso clan, a historic Japanese clan

Geography

 * Aso (river), a river in Italy
 * Aso River, in Democratic Republic of the Congo
 * Aso, Kumamoto, Japan
 * Asō, Ibaraki, a former Japanese town located in Namegata District that is now part of the city of Namegata
 * Mount Aso, a mountain in Japan
 * Aso Rock, a large outcrop on the outskirts of Abuja, Nigeria

Ships

 * Japanese cruiser Aso (1905–1932)
 * Aso-class patrol vessel, a class of large patrol vessels of the Japan Coast Guard, named after Mount Aso

Medicine

 * Allele-specific oligonucleotide
 * Antisense oligonucleotide
 * Anti-streptolysin O
 * Arterial switch operation
 * Arteriosclerosis obliterans
 * Annals of Surgical Oncology, a peer-reviewed medical journal

Orchestras

 * Adelaide Symphony Orchestra
 * Albany Symphony Orchestra
 * American Symphony Orchestra
 * Amman Symphony Orchestra (since 2015, the JOrchestra)
 * Annapolis Symphony Orchestra
 * Antwerp Symphony Orchestra
 * Appalachian Symphony Orchestra
 * Arkansas Symphony Orchestra
 * Atlanta Symphony Orchestra
 * Austin Symphony Orchestra

Technology

 * Analogue switch/sign-off, part of the digital television transition
 * App store optimization

Other uses

 * ASO, general secondary education (Algemeen Secundair Onderwijs in Dutch) in Belgium
 * Aso, a story art in the Philippine comic strip Pugad Baboy
 * ASO, another name for the arcade game Alpha Mission
 * Academy Sports + Outdoors, American retail chain
 * Address Supporting Organization, an Internet-protocol advisory group affiliated with ICANN
 * Administrative services organization, a company that provides human-resources and other administrative functions to client companies
 * Amaury Sport Organisation, organiser of the Tour de France and other sporting events
 * ASO or "anvil-shaped object", a cheap anvil made of inferior materials
 * Arbitrary slice ordering, an algorithm for loss prevention during image or video compression
 * App store optimization, a process of improving the visibility of a mobile app in an App Store
 * Areostationary orbit, a circular synchronous orbit around Mars in the equatorial plane
 * Australian Screen Online, online database of the Australian National Film and Sound Archive

People with the surname

 * Aso (surname)