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<p>The following sentence uses an <abbr> element for the name Sam.</p>
<p>I have a friend called <abbr title="Samuel Sultan"><b>Sam</b></abbr>.</p>
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<p>The following sentence uses an <acronym> element for the acronym HTML.</p>
<p>This chapter covers marking up text in <acronym title="Hypertext Markup Language"><b>HTML</b></acronym>.</p>
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<p>The following sentence uses a <dfn> element for the important term HTML</b>.</p>
<p>This book teaches you how mark up your documents for the web using <dfn title="Hypertext Markup Language"><b>HTML<b></dfn>.</p>
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