The man who made Windows possible

In 1975, David Bradley wrote the code for what is arguably the best-known computer keyboard combinations ever, Ctrl+Alt+Delete. It forces obstinate computers to restart when they will no longer follow other commands. He retired from IBM early this year.
And here's a snippet from an article a friend sent in [thanks Sunil]

At a 20-year celebration for the IBM PC, Bradley was on a panel with Microsoft founder Bill Gates and other tech icons. The discussion turned to the keys.
'I may have invented it, but Bill made it famous,' Bradley said.
Gates didn't laugh.