{{distinguish|text=I0 (disambiguation) (the letter I followed by zero)}} {{wiktionary|-io|IO|Io|io}}
'''Io''' most commonly refers to: * Io (moon), a moon of Jupiter * Io (mythology), daughter of Inachus in Greek mythology, and lover of Zeus who was turned into a heifer <!--Organized per WP:LONGDAB--> {{tocright}} '''Io''', '''IO''', '''iO''', '''I/O''', '''i/o''', or '''i.o.''' may also refer to:
==Arts, entertainment and media== ===Fictional elements=== *Io, one of DC Comics' Amazons *Scylla Io, one of Poseidon's Marine Generals in the ''Saint Seiya'' series *A ''Dungeons & Dragons'' dragon deity *Io Otonashi, a main character in the Japanese manga series ''Place to Place'' (''Acchi Kocchi'') *Io Nitta, a character in the game ''Shin Megami Tensei: Devil Survivor 2''
===Gaming=== *''iO'', a 2014 video game by Gamious *IO Interactive, a Danish computer game developer
===Music=== *IO (German band), a German band *Io (English band), an English band *I_o (musician), an American DJ and record producer (1990–2020) *''i/o'' (Peter Gabriel album), 2023
===Theatre and opera=== *''Io'' (opera), an unfinished ''acte de ballet'' (opera) by Jean-Philippe Rameau *iO Theater (ImprovOlympic), a theater in Chicago, Illinois, dedicated to improvisational comedy *IO West, a Los Angeles theater associated with the Chicago iO
===Other uses in arts, entertainment and media=== *''EO'' (original Polish title: ''IO''), a 2022 Jerzy Skolimowski film *''Io'' (film), a 2019 Netflix film *iO Digital Cable Service, a service offered by Cablevision *''International Organization'', a peer-reviewed journal that covers the entire field of international affairs
==Business and economics== *Industrial and organizational psychology, the field of psychology that studies work, academic, and other organizational issues *Industrial organization, the field of economics that studies the strategic behavior of firms, the structure of markets and their interactions *Insertion order, a business document specifying the inventory goal of an advertising campaign *Integrated operations, a term used in the petroleum industry describing new work processes and ways of working that have been facilitated by modern information and communication technologies *Interest-only, a type of collateralized mortgage obligation (CMO) or mortgage-backed security
==Language== *i.o., ''{{lang|la|in illo ordine}}'', Latin phrase meaning "respectively" ("in that order") *Io (princely title), a particle of a title used by Moldavian and Wallachian Princes-regnant *Ido language (ISO 639-1 language code IO), a constructed language *Indirect object, the object that is the recipient of an action (by a verb) *Yo, also referred to as Io
==Mythology== *Io (mythology), daughter of Inachus in Greek mythology, and lover of Zeus who was turned into a cow *Io, an alternate spelling of the nereid Ino, later known as Leukothea, who in the Odyssey gave Odysseus a veil that allowed him to breathe underwater *Io Matua Kore, in some Māori traditions the supreme god
==People== *{{Nihongo|Io Murota|室田 伊緒||born 1989}}, Japanese shogi player *{{Nihongo|Io Sakisaka|咲坂 伊緒}}, Japanese manga artist *Io Shirai (born 1990), Japanese professional wrestler *{{Nihongo|Iou Kuroda|黒田 硫黄||born 1971}}, Japanese manga artist *iO Tillett Wright (born 1985), American artist, director, photographer, writer, film maker, activist, and actor * Jean-Paul Appel, also known as Io, leader of the UFO religion Siderella
==Places on Earth== *British Indian Ocean Territory, ISO 3166-1 alpha-2 code *Io (island), an uninhabited islet near Crete, Greece *Io, Norway, a village in Alver, Norway *Mount Iō (disambiguation), name of several mountains in Japan *Indian Ocean
==Science and technology== ===Astronomy=== *85 Io, an asteroid
===Biology and medicine=== *''Io'' (gastropod), a genus of freshwater snail in the family Pleuroceridae *''Io'' (plant), a genus of plant in the tribe Senecioneae *''Automeris io'', a moth species in North America *''Aglais io'', the European peacock butterfly *Intraosseous infusion, the medical process of introducing medication directly into the bone marrow *Hawaiian hawk ({{langx|haw|{{okina|link=no}}io|links=no}}) *Immuno-oncology, another term for cancer immunotherapy
===Computing=== *.io, the Internet country code top-level domain (ccTLD) for the British Indian Ocean Territory *Io (programming language), a pure object-oriented programming language *IO.SYS, a system file in Microsoft DOS and Windows 95, 98 and ME *Indistinguishability obfuscation, a cryptographic tool to obscure computer code *Input/output, the collection of interfaces that different functional units of an information processing system use to communicate with each other
===Other uses in science and technology=== *Ionium (symbol Io), a claimed chemical element that was later realized to be thorium-230 *Iodine monoxide (symbol IO) *Image orthicon tube, a TV camera used between 1946 and 1968 *Infinitely often, a mathematics term sometimes written "i.o."; see an example in set-theoretic limit
==Other uses== *io (company), an artificial intelligence hardware company *Bureau of International Organization Affairs, in the U.S. Department of State *Government Printing Bureau (Macau), known in Portuguese as the ''Imprensa Oficial'' or "IO" *Indonesian Airlines (IATA airline designator IO) *Investigating Officer, a member of law enforcement in the United Kingdom who heads an investigation *Mitsubishi Pajero iO, a mini SUV model produced by Mitsubishi Motors *IO (Oral-B), a series of electric toothbrushes by Oral-B
==See also== *Ю or yu, a Cyrillic letter *I/O (disambiguation) *IOS (disambiguation) *I0 (disambiguation) (the letter "I" followed by the digit "0") *10 (disambiguation) (the digit "1" followed by the digit "0") *1O (disambiguation) (the digit "1" followed by the letter "O")
{{Disambiguation|geo|given name}}
Category:Japanese feminine given names Category:Feminine given names