IO

Io, IO, I/O, i/o, or i.o. may refer to:

Abbreviation

• Bureau of International Organization Affairs, in the U.S. Department of State
• iO Theater (ImprovOlympic), a theater in Chicago, Illinois, dedicated to improvisational comedy
• IO West, a Los Angeles theater associated with the Chicago iO
• Image orthicon tube, a TV camera used between 1946 and 1968
• Indian Ocean, Indian Ocean
• Indirect object, the object that is the recipient of an action (by a verb)
• i.o., in illo ordine, Latin phrase meaning "respectively" ("in that order")
• Industrial organization, the field of economics that studies the strategic behavior of firms, the structure of markets and their interactions
• Industrial and organizational psychology, the field of psychology that studies work, academic, and other organizational issues
• Input/output, the collection of interfaces that different functional units of an information processing system use to communicate with each other
• 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
• International Operations, a fictional American Intelligence Agency in Wildstorm comics
• International Organization, a peer-reviewed journal that covers the entire field of international affairs
• Intraosseous infusion, the medical process of introducing medication directly into the bone marrow
• iO Digital Cable Service, a service offered by Cablevision
• IO Interactive, a Danish computer game developer
• Interest-only, a type of collateralized mortgage obligation (CMO) or mortgage-backed security
• Insertion order, a business document specifying the inventory goal of an advertising campaign
• Investigating Officer, a police officer in the United Kingdom who heads an investigation, usually from CID but of any rank

Literature and mythology

• Io (mythology), daughter of Inachus in Greek mythology, and lover of Zeus who was turned into a cow
• Io, daughter of Iasus in Greek mythology, granddaughter of Argus the eponym king of Argos, descendant of Phoroneus (Paus. 2.16).
• 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 (opera), an unfinished acte de ballet (opera) by Jean-Philippe Rameau
• Io Matua Kore, in some Māori traditions the supreme god

Astronomy

• Io (moon), a moon of Jupiter
• 85 Io, an asteroid

Biology

• Automeris io, a moth species in North America
• The Hawaiian hawk's local name
• Inachis io, the European Peacock butterfly
• Io (genus), a genus of freshwater snail in the family Pleuroceridae

Chemistry

• The claimed element ionium (symbol Io), before it was realised this was actually thorium-230

Codes

• The two-letter ISO 639-1 language code for Ido, a constructed language
• Indonesian Airlines' IATA airline designator
• .io, the Internet country code top-level domain (ccTLD) for the British Indian Ocean Territory

Computing

• I/O, abbreviation for input/output
• Io (programming language), a pure object-oriented programming language
• The IO.SYS file in DOS and Windows 95, 98 and ME

History

• Io (voievodal title particle), a particle of a title used by Romanian royalty from Moldavia and Walachia

Modern fiction

• Blind Io, the current king of the gods in Terry Pratchett's Discworld series of fantasy novels
• Io (Babylon 5), a space station in the science fiction television show Babylon 5
• Scylla Io, one of Poseidon's Marine Generals in the Saint Seiya series
• Io, a hero in the 2013 video game Dota 2

People

• Io Shirai (born 1990), Japanese professional wrestler
• iO Tillett Wright (borh 1985), American artist, director, photographer, writer, film maker, activist, and actor
• Io Perl-Strahan (born 2001), child actress and niece to Michael Strahan

Places

• Io, Norway, a village in Meland, Norway

Popular culture

• IO (band), a German band
• Io (English band), an English band

Technology

• Mitsubishi Pajero iO, a mini SUV produced by Mitsubishi Motors

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")