IAS

IAS may stand for:

Accounting, Auditing

• International Accounting Standards
• Internal Audit Service (European Commission)

Administration

• Indian Administrative Service (Civil Service)

Religion

• International Association of Scientologists

Science

• Institute for Advanced Study
  • IAS computer, built at the Institute for Advanced Study
• Institut d'Astrophysique Spatiale
• Indian Academy of Sciences
• Islamic World Academy of Sciences, an organization promoting science and technology in the Muslim World
• Iranian Arachnological Society, an academic society for Iranian and International arachnologists

Health

• International AIDS Society, the world's leading independent association of HIV/AIDS professionals

Politics

• Institute for Anarchist Studies

Technology

Aeronautics

• Indicated airspeed
• Institute of the Aeronautical Sciences
• Institut aéronautique et spatial

Computing

• Internet Authentication Service
• Internet Application Server, a component of Oracle Application Server from Oracle Corporation
• IAS, a version of Digital Equipment Corporation's RSX-11 operating system

Transportation

• Iaşi International Airport in Iaşi, Romania, designated by IATA the airport code IAS
• IAS Cargo Airlines, a British airline

Other

• Independent Australian Scouts
• Instituto Ayrton Senna