"<a href=""http://www.youtube.com/watch?v=RYENl-P3Zh8&amp;t=6m27s"">6:27</a>  But how does it work without a clock.<br><br>I'm a nerd for even thinking that.",(reply>), The computer? It would likely have an internal clock, but setup with permissions to only specific programs so that you couldn't get access to the clock.