| IAS | Academy of Sciences of the Islamic Republic of Iran 
| Others |
| IAS | I Agree Sir
| Others |
| IAS | I Am Sick
| Others |
| IAS | i-Planet Application Server
| Others |
| IAS | Iasi, Romania
| Others |
| IAS | Ideas, Action, and Success
| Others |
| IAS | Idle Air Solenoid
| Others |
| IAS | Idle Air Stepper
| Others |
| IAS | IEEE Industrial Applications Society
| Others |
| IAS | IEEE Industry Applications Society Annual Meeting
| Others |
| IAS | Illinois Archaeological Survey
| Others |
| IAS | Image Acquisition System
| Others |
| IAS | Image Analysis & Stereology
| Others |
| IAS | Image Authentication System
| Others |
| IAS | Immediate Access Storage
| Others |
| IAS | Immediate Access Store
| Others |
| IAS | Immunisation Awareness Society
| Others |
| IAS | Impact Assessment Sheet
| Others |
| IAS | Impact Assessment System
| Others |
| IAs | Implementation Agreements
| Others |
| IAS | Improvement of Agricultural Statistics
| Others |
| IAS | In-line Air Separator
| Others |
| IAS | Increased Attack Speed
| Others |
| IAS | Independent African States
| Others |
| IAS | Independent Appeals Service
| Others |
| IAS | Independent Art Structures
| Others |
| IAS | Indian Academy of Sciences
| Others |
| IAS | Indian Accounting Standards
| Others |
| IAS | Indian Administrative Service
| Others |
| IAS | Indian Administrative Services
| Designation / Rank, Civic Administration |
| IAS | Indian Administrative Studies
| Others |
| IAS | Indian Administrative System
| Others |
| IAS | Indian Archaeological Society
| Others |
| IAS | Indiana Astronomical Society
| Others |
| IAS | Indianapolis Auto Show
| Others |
| IAS | Indicated Air Speed
| Others |
| IAS | Indicated Airspeed
| Others |
| IAS | Individual Assignment System
| Others |
| IAS | Individuals After Sarkar
| Others |
| IAS | Indonesia Automotive Society
| Others |
| IAS | Indoor Action Sports
| Others |
| IAS | Industrial Applications Society
| Others |
| IAS | Industrial Automation Show
| Others |
| IAS | Industrial Automation Solutions, Inc.
| Others |
| IAS | Industry Applications Society
| Others |
| IAS | Inertia Active System
| Others |
| IAS | Inertial Active Suspension
| Others |
| IAS | Inertial Active System
| Others |
| IAS | Information Access Service
| Others |
| IAS | Initial Action Services
| Others |
| IAS | Inlet Air Solenoid
| Others |
| IAS | Inmate Assignment System
| Others |
| IAS | Innovative Aviation Services
| Others |
| IAS | Insert After Sequence
| Others |
| IAS | Insolvency Advisory Service
| Others |
| IAS | Installment Activities Statement
| Others |
| IAS | Institut d'Astrophysique Spatiale, France
| Others |
| IAS | Institute for Advanced Studies
| Others |
| IAS | Institute for Advanced Study
| Others |
| IAS | Institute for Anarchist Studies
| Others |
| IAS | Institute of Advanced Study
| Others |
| IAS | Institute of African Studies
| Others |
| IAS | Institute of Agricultural Sciences
| Others |
| IAS | Institute of Alcohol Studies
| Others |
| IAS | Institute of Annoying Sillybillies
| Others |
| IAS | Institute of the Aeronautical Sciences
| Others |
| IAS | Instituto Ayrton Senna
| Others |
| IAS | Instructional Assistants Seattletimes
| Others |
| IAS | Instrument Air Supply
| Others |
| IAS | Insurance Accounting System
| Others |
| IAS | Intake Air System
| Others |
| IAS | Integral Active Steering
| Others |
| IAS | Integral Ad Science
| Others |
| IAS | Integrated Access Server
| Others |
| IAS | Integrated Access Service
| Others |
| IAS | Integrated Access Switch
| Others |
| IAS | Integrated Accounting Systems
| Others |
| IAS | Integrated Acquisition System
| Others |
| IAS | Integrated Administrative System
| Others |
| IAS | Integrated Analysis System
| Others |
| IAS | Integrated Archive Systems
| Others |
| IAS | Integrated Asset Services
| Others |
| IAS | Integrated Audio Systems
| Others |
| IAS | Integrated Avionics System
| Others |
| IAS | Intel Approved Supplier
| Others |
| IAS | Intel Attestation Service
| Others |
| IAS | Intel Audio Studio
| Others |
| IAS | Intelligence Analysis System
| Others |
| IAS | Intelligent Access System
| Others |
| IAS | Intelligent Application Switching
| Others |
| IAS | Intelligent Assistant Systems
| Others |
| IAS | Intelligent Autonomous Systems
| Others |
| IAS | Inter Axle Shaft Angle
| Others |
| IAS | Inter-Atrial Septum
| Others |
| IAS | Interactive Advisory Software
| Others |
| IAS | Interactive Application System
| Others |
| IAS | Interdisciplinary Arts and Sciences
| Others |
| IAS | Interdisciplinary Arts Symposium
| Others |
| IAS | Intergrated Automation System
| Others |
| IAS | Intermodulation Analysis System
| Others |
| IAS | Internal Airtightness System
| Others |
| IAS | Internal Anal Sphincter
| Others |
| IAS | Internal Audit Service
| Others |
| IAS | International Accounting Standard
| Others |
| IAS | International Accounting Standards
| Others |
| IAS | International Accreditation Service
| Others |
| IAS | International AIDS Society
| Others |
| IAS | International All Sports
| Others |
| IAS | International American School of Warsaw
| Others |
| IAS | International Antiviral Society
| Others |
| IAS | International Approval Services
| Others |
| IAS | International Armaments Strategy
| Others |
| IAS | International Asset Systems
| Others |
| IAS | International Association of Scientologists
| Others |
| IAS | International Association of Scientology
| Others |
| IAS | International Association of Sedimentologists
| Others |
| IAS | International Association of Sufism
| Others |
| IAS | International Atherosclerosis Society
| Others |
| IAS | International Auto Salon
| Others |
| IAS | International Auto Show
| Others |
| IAS | International Aviculturists Society
| Others |
| IAS | Internationally Accepted Standard
| Others |
| IAS | Internet Access Server
| Others |
| IAS | Internet Access Service
| Others |
| IAS | Internet Access System
| Others |
| IAS | Internet Acronym Server
| Others |
| IAS | Internet Addiction Syndrome
| Others |
| IAS | Internet Analysis System
| Others |
| iAS | Internet Application Server
| Others |
| IAS | Internet Authentication Server
| Others |
| IAS | Internet Authentication Service
| Others |
| IAS | Internet Web Application Server
| Others |
| IAS | Intersection Assistant System
| Others |
| IAS | Introduction to Automobile Service
| Others |
| IAS | Invasive Alien Species
| Others |
| IAS | Investment Analysts Society
| Others |
| IAS | Iowa Archeological Society
| Others |
| IAS | Iranian Arachnological Society
| Others |
| IAS | Irish Association for Suicidology
| Others |
| IAS | Islam Awareness Series
| Others |
| IAS | Islamic Academy of Sciences
| Others |
| IAS | Islamic Republic of Iran Academy of Sciences
| Others |
| IAS | Island Aviation Services, Limited
| Others |
| IAS | Italdesign Automobili Speciali
| Others |
| IAS | Item Assembly Structure
| Others |
| IAS | Izquierda Asturiana
| Others |