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<html><body><h1>The abbr element + the dfn element</h1><p><dfn><abbr title="Cascading Style Sheets">CSS</abbr></dfn> is a language that describes the style of an HTML document.</p></body><!-- Mirrored from www.w3schools.com/tags/tryit.asp?filename=tryhtml_abbr2 by HTTrack Website Copier/3.x [XR&CO'2014], Wed, 21 Dec 2022 17:33:26 GMT --></html>