12 Interesting Facts about Facebook as it turns 12

10. The CEO shortcut

By adding the number '4' behind the Facebook URL takes you to the wall of founder and CEO Mark Zuckerberg. This www.facebook.com/4 trick works irrespective of whether you are logged into your account or not.

If you are making a comment or a post, you can type @[4:0} and Zuckerberg’s name appears.