Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym IES is...

IES is

Institution of Engineers Singapore
Illuminating Engineering Society

More Meanings For IES:

Intelligent Evacuation System
Institution of Engineers Singapore
Illuminating Engineering Society
Intensive English Studies
Institute of Ecosystem Studies
Institute for Experimental Studies
Institute of Economic Studies
Indian Engineering Service
Interior Exterior Specialists Construction Group, Inc.
Internet Escrow Services
Indian Engineering Service
Indrema Entertainment System
Indian Education Society
Intelligence Evaluation Staff
Imagery Exploration System

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