title: What do "branch", "tag" and "trunk" mean in Subversion repositories?
body: <p>I've seen these words a lot around Subversion (and I guess general repository) discussions.<br>
  I have been using <strong>SVN</strong> for my projects for the last few years, but I've never grasped the complete concept of these directories.</p>
  
  <p>What do they mean?</p>