title: What is the difference between C++0x and C++11?
body: <p>I see mixed usage of these two terms here on SO.</p>
  
  <p><a href="http://en.wikipedia.org/wiki/C++11" rel="noreferrer">Wikipedia says</a></p>
  
  <blockquote>
    <p>C++11, also formerly known as C++0x ...</p>
  </blockquote>
  
  <p>but I am not sure why.</p>
  
  <ul>
  <li>Why was it first called C++0x and then C++11?</li>
  <li>Also, what does the x stand for? My guess - like a variable?</li>
  </ul>