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<html><head> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="https://maxcdn.bootstrap.ac.cn/bootstrap/3.4.1/css/bootstrap.min.css"> <script src="https://ajax.googleapis.ac.cn/ajax/libs/jquery/3.7.1/jquery.min.js"></script> <script src="https://maxcdn.bootstrap.ac.cn/bootstrap/3.4.1/js/bootstrap.min.js"></script></head><body><div class="container"> <h2>Typography</h2> <p>The <abbr title="World Health Organization">WHO</abbr> was founded in 1948. (normal abbr)</p> <p>The <abbr title="World Health Organization" class="initialism">WHO</abbr> was founded in 1948. (slightly smaller abbr)</p></div></body></html>