title: HTML and CSS: What do the <ul> and <li> tags stand for?
body: <p>In the following lines of CSS code:</p>
  
  <pre><code>.sf-menu li:hover ul, .sf-menu li.sfHover ul {top: 40px!important; }
  </code></pre>
  
  <p>What do the HTML tags <code>&lt;ul&gt;</code> and <code>&lt;li&gt;</code> mean?</p>