title: What's MAC address ? What is a unique ID for a PC?
body: <p>I have a PC with dual cores, it has two MAC addresses : 00-1D.... &amp; 00-21.....
  Are these IDs for the two cores ?
  If I want to get hold of a unique ID for this PC, how to get it with a Java call ? Maybe there is something in Java like "System.getId()" ?</p>
  
  <p>Frank</p>