IO

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

An abbreviation

• I.O., a theater in Chicago, Illinois dedicated to improvisational comedy
• 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
• Image orthicon tube, a TV camera used between 1946 and 1968
• 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 Interactive, a Danish computer game developer
• iO Digital Cable Service, a service offered by Cablevision
• Investigating Officer, a police officer in the United Kingdom who heads an investigation, usually from CID but of any rank
• Interest-only, a type of collateralized mortgage obligation (CMO) or mortgage-backed security
• 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
• Inventory objective or Insertion order, a business document specifying the inventory goal of an advertising campaign

A code

• Indonesian Airlines' IATA airline designator
• .io, the Internet country code top-level domain (ccTLD) for the British Indian Ocean Territory, or, more specificallly, the British Indian Ocean Territory's ISO 3166-1 alpha-2 country code and DAFIF 0413 / DIA 65-18 / FIPS PUB 10-4 territory code
• The two-letter ISO 639-1 language code for Ido, a constructed language

In astronomy

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

In biology

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

In computing

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

In history

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

In literature

• Io (mythology), daughter of Inachus in Greek mythology, and lover of Zeus
• 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, an unfinished actes de ballet of Jean-Philippe Rameau
• Io Matua Kore, in some Māori traditions the supreme god

In modern fiction

• Blind Io, the current king of the gods in Terry Pratchett's Discworld series of fantasy novels
• Io (Dungeons & Dragons), the chief deity worshipped by dragons in the Dungeons & Dragons role-playing game
• 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

In popular culture

• Io (arcade game) - a C64 arcade game published in 1988.
• IO (band), a German band
• Io (English band), an English band
• iO, a Chicago improvisational comedy theater formerly known as ImprovOlympic
• IO (2011 Webseries), Flinders University project by David Tang and Michael Tessari

In technology

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

People

• Io Shirai, (born 1990) Japanese professional wrestler

See also

• Ю or yu, a Cyrillic letter
• I/O (disambiguation)
• IOS (disambiguation)