IAS

IAS may stand for

• Indicated airspeed
• Ideal Adsorbed Solution, thermodynamic theory of adsorption of Minka and Myers
• International Accounting Standards
• International Adsorption Society
• International Affairs Specialist United States Air Force Officer Program emphasizing international understanding, cultural expertise, and adaptive language skills
• International Atherosclerosis Society
• Institute for Advanced Study
  • The IAS computer built at the Institute for Advanced Study
• Institute for Anarchist Studies
• Institute of the Aeronautical Sciences
• International Association of Scientologists
• International Association of Sedimentologists
• Indian Administrative Service
• Internet Authentication Service
• Internet Application Server an application server from Oracle Corporation
• Intelligent Application Switch
• Intelligence and Analysis Service, Japan's intelligence agency
• Integrated Anti-Swimmer System, an ultrasound system to detect submerged divers
• IAS Internet Slang- An expression used over internet to show amusement