title: What is the use for font files from font-awesome?
body: <p>I am using <code>font-awesome</code> and it works fine with its CDN extension for CSS files. Following is a simple example: </p>
  
  <pre><code>&lt;html&gt;
      &lt;head&gt;
          &lt;link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.4.0/css/font-awesome.css"&gt;
      &lt;/head&gt;
      &lt;body&gt;
          &lt;i class="fa fa-adjust"&gt;&lt;/i&gt;
      &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>The example runs fine, but from <a href="http://cdnjs.com/libraries/font-awesome" rel="nofollow">the CDN</a>, I also get links for <code>.otf</code>, <code>.eot</code>, <code>.svg</code>, <code>.ttf</code>, <code>.woff</code> files. What is the use of these files if the example renders well with only <code>.css</code> file extension?</p>