Ctrl+Alt+Delete was originally intended for restart of a hang computer running 16-bit DOS David Bradley invented it , but Bill Gates made it famous... Here is the history : "David Bradely, the inventor of CTRL-ALT-DEL was talking about why he created it during a panel celebrating the 20th anniversary of the IBM PC which included Bill Gates. Mr. Bradely said, 'I may have invented CTRL-ALT-DEL, but Bill Gates made it famous,' which just about brought the house down. The funniest part is the expression, or lack thereof, on the face of Bill. He wasn't too pleased, not even when Bradely said, 'I was talking about the Windows NT login..' "' See it on Youtube :-) http://www.youtube.com/watch?v=ZiH-iA9EO_Q[^]