IA
IA, Ia, or ia may refer to:

Arts and entertainment
Ia, an 1892 novelette by Arthur Quiller-Couch
"Iä", a fictional word in the works of H. P. Lovecraft
International Alliance of Theatrical Stage Employees (IATSE), which also goes by IA
International Artists, a record label

Businesses and organizations
Indian Airlines, logo
Indiana Academy, a school
International Academy, Bloomfield Hills, Michigan
International Artists, a record label
Internet Archaeology, an electronic journal
Internet Archive, online digital library and host organization of the Wayback Machine
Iraqi Airways (IATA airline designator IA)
Aircraft model prefix of Fabrica Argentina de Aviones, e.g. FMA IA 62
Impact assessment of public policy

Government, law, and military
Indian Army, the Indian Army
Indonesian Army, the Indonesian Army
Individual augmentee, U.S. military person temporarily assigned to a unit
Indecent assault, sexual criminal offense

Language
Ia (cuneiform), a sign in cuneiform writing
Inter alia (i.a.), Latin meaning "among other things"
Interlingua (ISO 639-2 code: ia)
Romanization of Cyrillic Я letter
Inshallah (iA), used by English-speaking Muslims.

People
Ia or Violet of Persia, fourth-century martyr, feast day September 11
Saint Ia of Cornwall
Mattias Eklundh, Swedish guitarist

Places
Ia or Oia, Greece, on Santorini
Iowa, U.S. (postal abbreviation)
Iá River, a river in Brazil

Science and technology
Archaeology
Institute of Archaeology, Chinese Academy of Social Sciences (IA)
IA, The Journal of the Society for Industrial Archeology
Industrial archaeology
Iron Age IA I, IA IIA, etc., in archaeology of Israel

Biology and medicine
IA (chemotherapy), with Idarubicin and cytarabine
Ia (genus), of vespertilionid bats
Phase Ia of a clinical trial
Immunoassay, biochemical test to measure concentrations through antibody or antigen

Computing and electronics
IA (vocaloid), in software
IA-32, Intel Architecture, 32-bit
IA-64, Intel Architecture, 64-bit
Implicit authentication,  by a smart device
Human intelligence amplification through technology
Intelligent agent, in artificial intelligence
Information architecture, the structural design of shared information
Information assurance, dealing with trust aspects of information

Other uses in science and technology
Group IA (or Ia), an obsolete designation for the group 1 elements
Type Ia supernova, a subtype of Type I supernova
Interactions of actors theory, by Gordon Pask

Other uses
Internal affairs (disambiguation)
Intermediate in Arts, an academic degree
Internal audit of an organization's operations
International affairs, alternative term for International relations, the study of politics, economics and law on a global level
Íþróttabandalag Akraness or ÍA, an Icelandic football team
Mazda2, a 2002–present Japanese subcompact car, sold in North America as the Scion iA and Toyota Yaris iA

See also
1A (disambiguation)
AI (disambiguation)