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

As abbreviation 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 arc in the Philippine comic strip Pugad Baboy Aso, standard mineral abbreviation for 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

August, September, October, a 3-month season period

People with the surname Aso (surname)

See also Aso Villa, the office and residence of the Nigerian President