| Acronym | Definition |
|---|
| IEC | International Electrotechnical Commission |
| IEC | Independent Electrical Contractors |
| IEC | International Engineering Consortium |
| IEC | Information, Education, and Communication |
| IEC | Institut d'Estudis Catalans (Barcelona, Spain) |
| IEC | Intestinal Epithelial Cell |
| IEC | Independent Electoral Commission (South Africa) |
| IEC | International Electrotechnical Committee (Geneve, Switzerland) |
| IEC | International Education Centre (various locations) |
| IEC | International Egg Commission |
| IEC | International Eucharistic Congress (Ireland) |
| IEC | International Education Consultancy (various locations) |
| IEC | International Economic Cooperation (China) |
| IEC | International Education Corporation (training; Irvine, CA) |
| IEC | Inter Exchange Carrier |
| IEC | Incoming Error Count |
| IEC | Invalid Escape Character |
| IEC | Internet Exchange Centers |
| IEC | International Electronics Commission |
| IEC | Informational Exception Control |
| IEC | Instituto de Estudos da Criança (Portuguese: Institute of Child Studies) |
| IEC | Interlayer Exchange Coupling |
| IEC | International English Centre (various locations) |
| IEC | Ion Exchange Chromatography |
| IEC | Independent Ethics Committee |
| IEC | Infrastructure Engineering Corporation (California) |
| IEC | Interexchange Carrier |
| IEC | International Education Conference |
| IEC | Inertial Electrostatic Confinement |
| IEC | International Executive Committee |
| IEC | Israel Electric Company |
| IEC | Individual Expenditure Ceiling (San Francisco Ethics Commission; San Francisco, CA) |
| IEC | Importer Exporter Code |
| IEC | Interstate Electronics Corporation |
| IEC | Interactive Evolutionary Computation |
| IEC | Ion-Exchange Capacity |
| IEC | Internet Empowered Consumer |
| IEC | International Ethological Conference |
| IEC | Iowa Events Center (Des Moines, IA) |
| IEC | Institutional Ethics Committee |
| IEC | International Editorial Council |
| IEC | Industrial Electrical Contractors, LLC (Bowling Green, KY) |
| IEC | International Electromechanical Commission |
| IEC | Import Export Code |
| IEC | International Extension College |
| IEC | Instituto de Estudios Cubanos (Spanish: Institute of Cuban Studies) |
| IEC | Institute for Economic Competitiveness (University of Central Florida) |
| IEC | Industrial Economics Inc (Cambridge, MA) |
| IEC | Interoperability Executive Customer Council (Microsoft) |
| IEC | Interdisciplinary Early Childhood (Kentucky) |
| IEC | Iowa Egg Council (est. 1973; Urbandale, IA) |
| IEC | Integrated Exploitation Capability |
| IEC | International Evangelical Church |
| IEC | Information, Education and Counseling |
| IEC | Israel Emergency Campaign |
| IEC | Islamic Educational Center |
| IEC | Integrated Electronic Control |
| IEC | Interamerican Ethanol Commission |
| IEC | Indian Employment Credit (taxes) |
| IEC | Immediate Environmental Concern (New Jersey Department of Environmental Protection) |
| IEC | Ingeniero En Electronica Y Comunicaciones (Mexico) |
| IEC | Industrial Ecology Center |
| IEC | Intelligence Evaluation Committee |
| IEC | Immediate Event Charging |
| IEC | Initial Emulsion Content (asphalt) |
| IEC | Incoming Error Count (BNR) |
| IEC | Institute for Catalysis in Energy Processes (Northwestern University; Illinois) |
| IEC | Integration and Evaluation Center |
| IEC | Institute of Employment Consultants (UK) |
| IEC | Integrated Engine Control |
| IEC | Infused Emitter Coupling |
| IEC | Item Entry Control |
| IEC | Imani Education Circle Charter School (Philadelphia, PA) |
| IEC | Indiana Endoscopy Center |
| IEC | Ignition and Excitation Circuit |
| IEC | Incremental Enabling Capability |
| IEC | International Exchange Commission |
| IEC | International Ethanol Commission (Brazil) |
| IEC | Indianapolis Endoscopy Center |
| IEC | ISDN Echo Canceler |
| IEC | Independent Exchange Carrier |
| IEC | Imagen y Estética Corporal (Spanish: Body Image and Beauty; spa; Guatemala) |
| IEC | Isipingo Environment Committee (South Africa) |