ASO

• 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

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

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

• 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

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

• 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 {{Annotated link|Arsenolite}}
• 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
• {{Annotated link|Aso ebi}}
• {{Annotated link|Aso Kujū National Park}}
• {{Annotated link|Aso Villa}}
• Australian Screen Online, online database of the Australian National Film and Sound Archive
• {{Annotated link|ASO Chlef}}

• Aso (surname)

• Aso Villa, the office and residence of the Nigerian President

{{disambiguation}}