| Acronym | Definition |
|---|
| IAC | Industry Advisory Council |
| IAC | InterActiveCorp (stock symbol) |
| IAC | International Advisory Committee (PSSC) |
| IAC | Instituto de Astrofísica de Canarias (Spanish: Astrophysics Institute of the Canary Islands) |
| IAC | In Any Case |
| IAC | International Association of Coaching |
| IAC | International Action Center |
| IAC | Information Analysis Center (DACS) |
| IAC | International Aerobatic Club |
| IAC | Indiana Arts Commission |
| IAC | International Academy of Ceramics |
| IAC | Interpret As Command (TELNET protocol) |
| IAC | Indirect Air Carrier |
| IAC | International Academy of Consciousness |
| IAC | Industry Advisory Committee |
| IAC | International Agricultural Centre |
| IAC | Inter Agency Committee |
| IAC | Individual Assistance Center (US FEMA) |
| IAC | Institut für Anorganische Chemie (Kiel, Germany) |
| IAC | Internal Auditory Canal |
| IAC | Inter-Application Communication |
| IAC | Interapplication Communication (Apple) |
| IAC | International Academy of Cytology |
| IAC | International Access Code |
| IAC | Irish Air Corps |
| IAC | Iraq Action Coalition |
| IAC | Iowa Arts Council |
| IAC | Industries Assistance Commission |
| IAC | International Armoring Corporation (Ogden, Utah) |
| IAC | Industrial Arbitration Court (Singapore) |
| IAC | Interstate Athletic Conference |
| IAC | Idaho Association of Counties |
| IAC | International Association for Counselling |
| IAC | Intelligent Automation Corporation (San Diego, California) |
| IAC | Instrument Approach Chart (aviation) |
| IAC | International Association for Cybernetics |
| IAC | Interagency Committee on School Construction |
| IAC | International Auctioneer Championship |
| IAC | Internal Audit Committee |
| IAC | International Adoption Center |
| IAC | Internet Access Coalition |
| IAC | Instituto Agronomico Campinas (Brazil) |
| IAC | Integrated Avionics Computer |
| IAC | Islamic Association of China |
| IAC | Interior-Aleutians Campus (University of Alaska Fairbanks) |
| IAC | Iraqi Assistance Center |
| IAC | Institute for Antiquity and Christianity |
| IAC | Indian Airlines Corporation (ICAO code) |
| IAC | International Agricultural Center (The Netherlands) |
| IAC | Intelligence Analysis Center |
| IAC | International Armaments Cooperation |
| IAC | Internet Application Component |
| IAC | Investment Advice Certificate |
| IAC | Infrastructure Advisory Committee |
| IAC | Imperfect Authentic Cadence (music) |
| IAC | Intertribal Agricultural Council |
| IAC | Instrução de Aviação Civil (Brasil) |
| IAC | Instituto Colombiano de Codificación y Automatización Comercial (Bogotá, Colombia) |
| IAC | IFOAM Accreditation Criteria |
| IAC | International Academy Council |
| IAC | Initial Alignment Control |
| IAC | Institutional Actions Council (Higher Learning Commission) |
| IAC | Industry Advisory Conference (Ul) |
| IAC | Issuer Action Code(s) |
| IAC | Investors Association of Canada |
| IAC | Institute for Atmosphere and Climate (ETH Zurich) |
| IAC | Indirect Adaptive Control |
| IAC | Internet Advisory Committee (Canada) |
| IAC | Independent Assurance Contractor |
| IAC | Interexchange Access Customer (Bellcore) |
| IAC | Industrial Accident Commission |
| IAC | Instrument on A Card |
| IAC | Intelligent Access Controller (Sprint) |
| IAC | Industrial Application Center |
| IAC | Instantaneous Airborne Count |
| IAC | Infostructure Architecture Council (USAF) |
| IAC | Individual Activity Code (electronic access code) |
| IAC | Intelligent Asynchronous Controller |
| IAC | Integrating Associate Contractor |
| IAC | Interstate Assurance Company |
| IAC | Initial Approach Course |
| IAC | Intelligence Analysis Cell |
| IAC | Integrated Access Controller (AT&T) |
| IAC | International Accounting Centre |
| IAC | Independent Action Center |
| IAC | International Arms Cooperation |
| IAC | Instrument Alignment Cube |
| IAC | In Awhile Crocodile |
| IAC | Interim Acceptance Criterion |
| IAC | Instituto de Ação Cultural (Portuguese: Institute of Cultural Action; Brazil) |
| IAC | Inbound Approach Course |
| IAC | ISDN Access Controller |
| IAC | Instructor Aircraft Commander (military pilot course) |
| IAC | Integration, Assembly & Checkout |
| IAC | Inter-Enterprise Application Cooperation |
| IAC | Inter-Array Communication/Correlation |
| IAC | Inmate Advisory Committee |
| IAC | Information Assurance and Compliance |
| IAC | Industrial Analysis Centre (Canada) |
| IAC | Israeli Awareness Commission |
| IAC | International Alliance for Children, Inc. (New Milford, CT) |
| IAC | Independent Auditing Consulting (Vietnam) |
| IAC | Immunization Action Coalition |
| IAC | Institutional Assessment and Compliance (South Carolina) |
| IAC | Infidels Are Cool (political blog) |
| IAC | Investment Advisory Committee |
| IAC | International Aviation Consultants (partnership) |
| IAC | Independent Artists Company |
| IAC | Indian Affairs Committee (various organizations) |
| IAC | International Affairs Committee |
| IAC | International Astronautical Congress |
| IAC | Illinois Administrative Code |
| IAC | International Antarctic Centre (New Zealand) |
| IAC | Identified Alien Craft (UFO community's slang for a UFO operated by US Government) |
| IAC | Idle Air Control (automotive) |
| IAC | Image Analysis Center |
| IAC | Idaho Accelerator Center (Idaho State University, Pocatello, ID) |
| IAC | It's A Crime (game) |
| IAC | Independent Anglican Church (Canada Synod) |
| IAC | Inter-American Convention for the Protection and Conservation of Sea Turtles (treaty) |
| IAC | Instrumental Analytical Chemistry (various organizations) |
| IAC | International Armed Conflict |
| IAC | I Am Confused |
| IAC | Israel Action Committee (various locations) |
| IAC | Inheritance of Acquired Characteristics (adaptation theory) |
| IAC | Italian American Club (various locations) |
| IAC | International Aerosol Conference (International Aerosol Research Assembly) |
| IAC | Interdepartmental Analytical Center (Russia) |
| IAC | International Anti-Corruption (corporate corruption) |
| IAC | Irving Arts Center (Irving, TX) |
| IAC | Identity and Access Control |