IES

== English == === Proper noun === IES Initialism of Illuminating Engineering Society. == Catalan == === Pronunciation === === Noun === IES f (invariable) initialism of institut d'educació secundària == Portuguese == === Noun === IES f (plural IES or (uncommon) IESs) initialism of instituição de ensino superior == Spanish == === Noun === IES f (plural IES) (Spain) initialism of instituto de educación secundaria