ARI
# ARI

ARI may refer to:

## Organizations

* Acoustics Research Institute of the Austrian Academy of Sciences
* Civic Coalition ARI, a political party in Argentina
* American Refrigerant Institute, North America
* Angel Resource Institute
* Arthur Rylah Institute for Environmental Research, Victoria, Australia
* Associazione Radioamatori Italiani, Italian amateur radio association
* Astronomisches Rechen-Institut, an institute based in Heidelberg, Germany
* Astrophysics Research Institute, Merseyside, England
* Autism Research Institute
* Avicenna Research Institute, an Iranian biotechnology institute
* Ayn Rand Institute, promoting Objectivism

## Other uses

* Chacalluta International Airport in Arica, Chile (IATA code)
* Aberdeen Royal Infirmary, Scotland
* Acute respiratory infection
* Adjusted Rand Index, a clustering metric
* A common abbreviation for the U.S. state of Arizona and its major professional sports teams
   * Arizona Cardinals of the National Football League
   * Arizona Diamondbacks of Major League Baseball
   * Arizona Coyotes of the National Hockey League
* Autofahrer-Rundfunk-Informationssystem, former German radio traffic broadcasts
* Automated Readability Index
