 allowed.</p>
<div class="sourceCode" id="cb2"><pre class="sourceCode R"><code class="sourceCode r"><span id="cb2-1"><a href="#cb2-1" tabindex="-1"></a>                        Preamble</span></code></pre></div>
<p>The GNU General Public License is a free, copyleft license for software and other kinds of works.</p>
<p>The licenses for most software and other practical works are designed to take away your freedom to share and change the works. By contrast, the GNU General Public License is intended to guarant