title: What do x86_64, i386, ia64 and other such jargons stand for?
body: <p>I frequently encounter these terms and am confused about them. Are they specific to the Processor, or the Operating System, or both?</p>
  
  <p>I have <strong>Ubuntu 12.04</strong> running on <strong>Intel i7</strong> machine. So which one of them would apply for my case?</p>