title: CurrentVersion value in registry for each windows operating system
body: <p>I want to know <code>CurrentVersion</code> value for each operating system at</p>
  <pre><code>HKLM &quot;SOFTWARE\Microsoft\Windows NT\CurrentVersion&quot;
  </code></pre>
  <p>For example: I have windows 7 professional installed on my machine and <code>CurrentVersion</code> value is <code>6.1</code>.</p>
  <p>Can any one list it down for all windows operating systems since Windows 98?</p>