| Acronym | Definition |
|---|
| IAS➣Institute for Advanced Studies (also seen as IUSS) |
| IAS➣International Accounting Standards |
| IAS➣Industry Applications Society (IEEE) |
| IAS➣Indian Administrative Service (formerly Indian Civil Service) |
| IAS➣International AIDS Society |
| IAS➣Indian Academy of Sciences (Bangalore, India) |
| IAS➣Internal Audit Services |
| IAS➣Invasive Alien Species (APEC subcommittee) |
| IAS➣Industrial Automation Services (various locations) |
| IAS➣It's a Secret |
| IAS➣Impact Assessment Study (various locations) |
| IAS➣Intelligent Autonomous Systems |
| IAS➣Integrated Avionics System |
| IAS➣International Aid Services |
| IAS➣International Association of Scientologists |
| IAS➣Immersive & Autonomous System (artificial intelligence) |
| IAS➣International and Area Studies |
| IAS➣Island Aviation Services (Maldives) |
| IAS➣International Association of Sedimentologists |
| IAS➣In All Seriousness |
| IAS➣Internet Application Server (Oracle) |
| IAS➣Institut d'Astrophysique Spatiale (French) |
| IAS➣Internal Anal Sphincter |
| IAS➣Internet Authentication Service (Microsoft) |
| IAS➣Internet Authentication Service (remote access security for Windows 2000) |
| IAS➣Institute of Administrative Sciences (Pakistan) |
| IAS➣Integrated Automation System (various companies) |
| IAS➣Interatrial Septum (cardiology) |
| IAS➣Immigration Advisory Service (UK) |
| IAS➣Intruder Alarm System |
| IAS➣Industrial Automation Show (trade show) |
| IAS➣International Assignment Services |
| IAS➣Internal Audit Section (Hong Kong) |
| IAS➣Institute of Atmospheric Sciences |
| IAS➣International Audit Standards |
| IAS➣Internet Web Application Server |
| IAS➣Implementation Agreements |
| IAS➣Intelligent Application Switching |
| IAS➣Institute of Advanced Study |
| IAS➣Internet Authentication Service |
| IAS➣Integrated Access Server |
| IAS➣Internet Access Server |
| IAS➣Industrial Applications Society |
| IAS➣Internet Authentication Server |
| IAS➣Information Access Service |
| IAS➣Image Authentication System |
| IAS➣Image Acquisition System |
| IAS➣Internet Acronym Server |
| IAS➣I-Planet Application Server |
| IAS➣Integrated Access Service |
| IAS➣Inertia Active System |
| IAS➣International Association of Sufism |
| IAS➣Information Assurance and Security (International Symposium) |
| IAS➣Integrated Assessment Services (certifications; India) |
| IAS➣Intra-Abdominal Sepsis |
| IAS➣Indicated Air Speed |
| IAS➣Intelligence Analysis System |
| IAS➣Impresa Autolinee Scura (Italian: Dark Bus Company) |
| IAS➣Industrial Air Solutions (various locations) |
| IAS➣Increased Attack Speed (Diablo) |
| IAS➣Image Analysis and Stereology (journal) |
| IAS➣Intra-Americas Sea |
| IAS➣Inergy Automotive Systems (various locations) |
| IAS➣It's Always Something |
| IAS➣Immigrants and Asylum Seekers (UK) |
| IAS➣Inorganic Arsenic |
| IAS➣Inertia Active System (Edlebrock auto/motorcycle progressive suspension) |
| IAS➣Islamic World Academy of Sciences |
| IAS➣Instrument Air System |
| IAS➣International Affairs Specialist (US Air Force) |
| IAS➣Integrated Automation Solutions |
| IAS➣International Auto Salon (Auto Exhibitor Show) |
| IAS➣Interactive Application System |
| IAS➣Independent Advocacy Services (UK) |
| IAS➣Image Authentication System (software; various companies) |
| IAS➣Information Analysis Section (United Nations Office for the Coordination of Humanitarian Affairs) |
| IAS➣Instituto Argentino de Siderurgia (Argentine Institute of Iron and Steel Industry) |
| IAS➣Insurance Advisory Service (various locations) |
| IAS➣Integrated Access Switch (Northchurch Comm) |
| IAS➣Immunisation Awareness Society |
| IAS➣Image Assessment System |
| IAS➣International Assistance System |
| IAS➣International Accounting System |
| IAS➣Information Access System |
| IAS➣Initial Advice Statement |
| IAS➣International Aroid Society |
| IAS➣Image Access Solutions |
| IAS➣Increase Attack Speed (gaming) |
| IAS➣Integrated Application Solutions (Tekelec) |
| IAS➣In-situ Air Sparging |
| IAS➣Institut für Automatisierungs-und Softwaretechnik (German: Institute of Industrial Automation and Software Engineering; Universitat Stuttgart) |
| IAS➣Institute of Aeronautical Sciences |
| IAS➣International Association of Seismology |
| IAS➣Intel Audio Studio |
| IAS➣Isobaric Analog State |
| IAS➣Institute for Afghan Studies |
| IAS➣Index Amortizing Swap (finance) |
| IAS➣Information Assurance Solutions |
| IAS➣Iasi, Romania - Iasi (Airport Code) |
| IAS➣Information Access Services |
| IAS➣Instructional Assessment System (various universities) |
| IAS➣Individual Assignment System (New York Supreme Court) |
| IAS➣International Aid Sweden |
| IAS➣Immediate Access Storage |
| IAS➣Industrial Adjustment Services (Canada) |
| IAS➣International Association of Seismologists |
| IAS➣Internet Astronomy School |
| IAS➣Internal Audio Subsystem |
| IAS➣Internet Award Scheme (EU) |
| IAS➣International Adhesions Society |
| IAS➣Interactive Analysis System |
| IAS➣Impact Assessment Statement |
| IAS➣Institute for Applied Socio-Economics |
| IAS➣Incineration At Sea |
| IAS➣Institute for Aerospace Studies |
| IAS➣Institute of Agriculture Sciences (Vietnam) |
| IAS➣Islamic Association of Saskatchewan (Canada) |
| IAS➣Image Access Service |
| IAS➣Integrated AUTODIN System |
| IAS➣Intra-Atrial Septum (heart) |
| IAS➣Integrate-And-Square |
| IAS➣Institute of Asset Management (UK) |
| IAS➣Information Applications and Systems |
| IAS➣Ideal Access Structure |
| IAS➣Interference Analysis System |
| IAS➣Instrument Analog Slice |
| IAS➣Image Annotation Service |
| IAS➣Inelastic Atom Scattering |
| IAS➣Institut voor Alternative Strategieen (Dutch: Institute for Alternative Strategies) |
| IAS➣International Armaments Strategy |
| IAS➣Intelligence Analyst Station |
| IAS➣Integrated Accounting/Avionics System |
| IAS➣Institutional Access System (hotline; US Department of Education) |
| IAS➣Indirect Access Service |
| IAS➣Infrastructure Architecture Solutions |