ISO is the most common abbreviation for the International Organization for Standardization. ISO or Iso may also refer to:

Business and finance

* Iso (supermarket), a chain of Danish supermarkets incorporated into the SuperBest chain in 2007 * Iso Omena ("Big Apple"), a shopping center in Finland * Incentive stock option, a type of employee stock option * Independent Sales Organization, a company that partners with an acquiring bank to provide merchant services * Insurance Services Office, an American insurance underwriter * Intermarket sweep order, a type of limit order on financial markets * Iso (automobile), an Italian car manufacturer

Arts and entertainment

* Isomorphic Algorithms (ISOs), a fictional race in the digital world of ''Tron: Legacy'' * Iso (comics), a Marvel comics character

Music

* Iso (album), ''Iso'' (album), an album by Ismaël Lô * Iceland Symphony Orchestra * Indianapolis Symphony Orchestra, Indiana, US * International Symphony Orchestra, of Sarnia, Ontario and Port Huron, Michigan, US * ISO Records, a vanity label by British musician David Bowie

Organizations

* Imamia Students Organisation, an Islamic organization in Pakistan * Independent system operator, a North American organization that coordinates, controls and monitors the operation of the electrical power system * Internal Security Organisation, a government security agency in Uganda * International Socialist Organization, United States Trotskyist organization, active from 1976 to 2019 * International Socialist Organisation (Australia), Australian Trotskyist organization, active from 1971 to 2008 * International Socialist Organisation (Germany), German Trotskyist organisation, established in 2016 * International Socialist Organisation (New Zealand), New Zealand Trotskyist organization, founded in the early 1990s * International Organization for Standardization ** List of International Organization for Standardization standards, a list of ISO standards * (Dutch National Students Association), the Netherlands * Iran Scout Organization

People

* Mitsuo Iso (磯光雄, Iso Mitsuo; born 1966), Japanese animator * Iso Mutsu (睦磯, Mutsu Iso; 1867–1930), British writer * , Japanese rower * Volmari Iso-Hollo (1907–1969), Finnish athlete * Iso Lero "Džamba", Yugoslav criminal

Places

* Iso-Heikkilä, a district in Turku, Finland * Iso-Naakkima, a lake in Finland * Iso-Roine, a lake in Finland

Science and technology

* ISO character set (disambiguation) * ISO image, a file containing the whole contents of an optical disc * ISO base media file format, a container format for time-based multimedia files * ISO 5800, a film speed system ** Digital camera ISO, light sensitivity of a digital image sensor * ISO 8601, a date format * ''ISO(n)'', the Euclidean group * Isopropyl alcohol, the simplest secondary alcohol * Infrared Space Observatory, a space telescope active from 1995 to 1998 * International Science Olympiad, a series of science competitions for students * Iso (fish), ''Iso'' (fish), a genus of surf sardines in the family Notocheiridae * Isomer, chemicals with the same chemical formula but different structures * Isorhapontigenin, a stilbenoid (chemical) * Isotonitazene, a benzimidazole-derived opioid analgesic drug, colloquially referred to as "iso" * Sensory organ, ISO: integumentary sensory organ

Other uses

* Imperial Service Order, an award in the British honours system * Isolated Power, a sabermetrics baseball statistic * Kinston Regional Jetport (IATA airport code: ISO), North Carolina, US * Iso (American football), a type of play used in American football * ISO (dinghy), a class of sailing dinghy