IAS
# IAS

IAS may refer to:

## Science

* Institute for Advanced Study, in Princeton, New Jersey, United States
* Image Analysis & Stereology, the official journal of the International Society for Stereology & Image Analysis.
* Iowa Archeological Society, United States
* Iranian Arachnological Society, for the study of arachnids in Iran
* International AIDS Society, an association of HIV/AIDS professionals
* Institute of Agricultural Sciences, Banaras Hindu University, in India
* Institute for Advanced Study at University of Minnesota in Minneapolis, Minnesota
* Institute of Advanced Study (Durham) in Durham, North East England
* IEEE Industry Applications Society

## Government

* Indian Administrative Service, the Indian administrative civil service
* Intergovernmental Affairs Secretariat (Canada)

## Finance

* International Accounting Standards
* Internal Audit Service (European Commission)
* Investment Analysts Society of Southern Africa
* various numbered International Financial Reporting Standards

## Religion

* International Association of Scientologists
* International Association of Sufism

## Politics

* Institute for Anarchist Studies
* Izquierda Asturiana, a political party in Spain
* Immunisation Awareness Society, a New Zealand anti-vaccination group
* International Aviation and Shipping emissions, specifically greenhouse gas emissions arising from those sectors (the term also used in the United Kingdom Climate Change Act 2008)

## Aeronautics

* Indicated airspeed
* Institute of Aerospace Sciences, in the United States
* Institut aéronautique et spatial, in France
* Iași International Airport, IATA designation for the airport in Iași, Romania
* IAS Cargo Airlines, a British airline

## Computing

* IAS machine, the first electronic computer built at the Institute for Advanced Study
* Interactive Application System, a DEC PDP-11 operating system
* Internet Application Server, alternate name for Oracle Application Server
* Internet Authentication Service, a component of Windows Server

## Other uses

* Instituto Ayrton Senna, an NGO in Brasil
* Insulin autoimmune syndrome, a rare cause of reversible autoimmune hypoglycemia
* Integral Ad Science, an American technology company that analyzes the value of digital advertisements
* International American School of Warsaw, a preK–12 school in Poland
* International Automated Systems, an American company
* IAS Limited an Australian-based gambling company
* Internal anal sphincter, human anatomy
