what does the su mean: process = Runtime.getRuntime().exec("su");
<p>I am trying to figure out some code that I was given.  Can someone tell me what this means? </p>

<pre><code>process = Runtime.getRuntime().exec("su");
os = new DataOutputStream(process.getOutputStream());
</code></pre>

<p>Especially the su.</p>

<p>Thanks!</p>
