| Acronym | Definition |
|---|
| IES➣Illuminating Engineering Society |
| IES➣Institute of Education Sciences (US Department of Education) |
| IES➣Illuminating Engineering Society (of North America) |
| IES➣Institute for European Studies |
| IES➣Institute for Environment and Sustainability |
| IES➣Integrated Engineering Software |
| IES➣Industrial Extension Service (North Carolina State University) |
| IES➣Independent Energy Systems (California) |
| IES➣Investimenti e Sviluppo (Italian: Investments and Development) |
| IES➣International Education Society (est. 1997) |
| IES➣International Energy Services (various locations) |
| IES➣Institute for Employment Studies |
| IES➣Impact of Event Scale |
| IES➣International English School (various locations) |
| IES➣Integrated Engineering Solutions (various locations) |
| IES➣International Economic Statistics |
| IES➣Integrated Environmental Services (Lake Forest, CA) |
| IES➣Intelligent Emulation Switching |
| IES➣Incoming E-Mail Solution |
| IES➣Inter Enterprise System |
| IES➣Integrated Enterprise System |
| IES➣Individual Experts |
| IES➣Integrated Enterprise Solutions |
| IES➣Integrated Energy Services (various companies) |
| IES➣Institute for Environmental Studies (University of Wisconsin-Madison) |
| IES➣Integrated Electronic Systems (Eugene, OR) |
| IES➣International Exchange Service (various organizations) |
| IES➣Isokinetics and Exercise Science (international journal) |
| IES➣Intensive English School (various locations) |
| IES➣Instrumentation Electrical Services (Manahawkin, NJ) |
| IES➣Intergroup Exemestane Study |
| IES➣Institute of Environmental Sciences |
| IES➣Integrated Energy Systems (Department of Energy) |
| IES➣IEEE Industrial Electronics Society |
| IES➣Infrared Emission Spectroscopy |
| IES➣Integrated Enterprise Solutions, Inc. (New York) |
| IES➣Industrial Emergency Services (Baton Rouge, LA) |
| IES➣Information Exchange System |
| IES➣Innovative Energy Services, Inc. (various locations) |
| IES➣Intelligent Educational System |
| IES➣International Employment Services (various locations) |
| IES➣International Education Software (Japan) |
| IES➣Integrated Environmental Systems, Inc. (various companies) |
| IES➣Indian Engineering Services |
| IES➣Inverted Echo Sounders |
| IES➣Innovative Equipment Solutions (various locations) |
| IES➣Industry Executive Subcommittee |
| IES➣Institute for Environmental Security (The Hague, Netherlands) |
| IES➣Innovative Enterprise Software |
| IES➣Indian Environmental Society (India) |
| IES➣Iowa Engineering Society |
| IES➣Intelligent and Evolutionary Systems |
| IES➣Incomplete or Erroneous Specification (software quality) |
| IES➣Imaging Electron Spectrometer |
| IES➣Institute of Economics and Statistics (University of Oxford; UK) |
| IES➣Imagery Exploitation Services |
| IES➣Intelligent Emulation Switching (Epson) |
| IES➣Intermediate Executive Skills |
| IES➣Indrema Entertainment System |
| IES➣Imagery Exploitation Support |
| IES➣Instituto de Estudios en Seguridad (Spanish: Institute for Security Studies; Guatemala) |
| IES➣Institutions de l'Enseignement Supérieur |
| IES➣Institute of Engineering Science |
| IES➣Industrial Engineering Standard |
| IES➣iPlanet Enterprise Server |
| IES➣Interfaith Emergency Services |
| IES➣Iaeger Elementary School (West Virginia) |
| IES➣IDEX II Imagery Exploitation Station |
| IES➣Interferometric Editing System |
| IES➣Imagery Exploitation/Exploration System |
| IES➣Imagery Exploitation Segment |
| IES➣Institute of Ecosytem Studies |
| IES➣Intelligence Exploitation Squadron |
| IES➣Industrial Engineer Standard |
| IES➣Imelda Elementary School (Philippines) |
| IES➣Industrial Economics Strategy |