IAA may refer to:

Science and Medicine

* Indole-3-acetic acid, a plant hormone * Aux/IAA repressors, a class of early

auxin Auxins (plural of auxin ) are a class of plant hormones (or plant-growth regulators) with some morphogen-like characteristics. Auxins play a cardinal role in coordination of many growth and behavioral processes in plant life cycles and are essenti ...

responsive transcription factors in plants *

Insulin autoantibody Slowly evolving immune-mediated diabetes, or latent autoimmune diabetes in adults (LADA), is a form of diabetes that exhibits clinical features similar to both type 1 diabetes (T1D) and type 2 diabetes (T2D), and is sometimes referred to as typ ...

, used in diagnosing Latent autoimmune diabetes * Interrupted aortic arch, a medical condition * Instituto de Astrofísica de Andalucía, for the (IAA-CSIC) research institute in Spain * Iodoacetamide, an alkylating agent * Isoamyl alcohol, a common name for 3-Methylbutan-1-ol *

Independent Ambulance Association The Independent Ambulance Association or IAA is the non-profit body representing ambulance services regulated by the Care Quality Commission in England, but not part of the statutory National Health Service provision, who are represented by th ...

representing private ambulance services in the United Kingdom

Aviation

Igarka Airport Igarka Airport () is an airport in Krasnoyarsk Krai, Russia located south of Igarka Igarka (russian: Ига́рка) is a town in Turukhansky District of Krasnoyarsk Krai, Russia, located north of the Arctic Circle. Igarka is a monotown ...

IATA code * Indianapolis Airport Authority *

Iran Aseman Airlines Iran Aseman Airlines ( fa, هواپیمایی آسمان, Havâpeymâyi-ye Âsemân) is the third-largest Iranian airline headquartered in Tehran. It operates scheduled domestic passenger services and regional international services. History ...

, an Iranian airline * Irish Aviation Authority * Israel Airports Authority * International Academy of Astronautics

Automobile

* International Motor Show Germany, known natively as Internationale Automobil-Ausstellung

Computing

* Interactive Achievement Awards, now known as

D.I.C.E. Awards The D.I.C.E. Awards (formerly the Interactive Achievement Awards) is an award show in the video game industry started in 1998 and commonly referred to in the industry as the "video games Academy Awards, Oscar". The awards are arranged by the Ac ...

Education

* Idyllwild Arts Academy, a private high school in Idyllwild, California * Intercollegiate Athletic Association, former name of the National Collegiate Athletic Association * Interlochen Arts Academy, a boarding school at the Interlochen Center for the Arts *

Inter-American Academy of Guayaquil InterAmerican Academy of Guayaquil (IAA) is an American International school in Guayaquil, Guayas, Ecuador, serving two years (nursery level) through grade 12.Information Affairs Authority of Bahrain

Sports

* International Ammunition Association

Associations

* Academia Sinica Institute of Astronomy and Astrophysics, a research institute in Taiwan * Illinois Agricultural Association * Immigration Appellate Authority (UK) *

Indian Association of Alberta The Indian Association of Alberta is a province-wide First Nations rights organization. It was founded by John Callihoo and John Laurie in 1939, after splitting off from the League of Indians in Western Canada. Origins and expansion Before 1946 ...

Institute for Applied Autonomy The Institute for Applied Autonomy was an activist group of anonymous artists known for employing technology in protest. The group focused on dissemination of knowledge, autonomy, and methods of self-determination through artistic expression and ap ...

* Instituto de Arqueología Amazónica, archeological research institute in Peru * Instituto de Astrofísica de Andalucía, research institute funded by the Spanish government *

International Academy of Architecture The International Academy of Architecture - ''a non-profit-making company for performing activities for private benefit'' (IAA, bg, Международна архитектурна академия) is a non-governmental and non-profit organiz ...

, Bulgarian NGO & NPO * International Academy of Astronautics, Swedish NGO *

International Actuarial Association The International Actuarial Association (IAA) is a worldwide association of local professional actuarial associations. History The IAA is the continuation of the ''Comité Permanent des Congrès d’Actuaires'', established in 1895, as an assoc ...

, worldwide association of actuarial associations * International Advertising Association, international marketing industry association * International Association of Art *

International Astrostatistics Association The International Astrostatistics Association (IAA) is a non-profit professional organization for astrostatisticians. Astrostatistics as a discipline is composed of astrophysicists, statisticians, and those in computer information sciences who ha ...

* Investment Adviser Association * Israeli Astronomical Association

State institutions

* Instituto Antártico Argentino, Argentine Antarctic Institute: federal agency for Antarctic research * Israel Antiquities Authority, Israeli governmental authority

Other uses

Id al Adha Eid al-Adha () is the second and the larger of the two main holidays celebrated in Islam (the other being Eid al-Fitr). It honours the willingness of Ibrahim (Abraham) to sacrifice his son Ismail (Ishmael) as an act of obedience to Allah's com ...

, Muslim holiday *

Intelligence Authorization Act The Intelligence Authorization Act was implemented in order to codify covert, clandestine operations and defines requirements for reporting such operations to the Congress. The American Constitution states, in Article 1, Section 9, that "a regu ...

(1991 - U.S.) * Islamic Army of Aden, militant group designated as a terrorist organization by Bahrain, Canada and the UK {{disambig