As Bill Gates prepares to end his full-time work at Microsoft, he tells the BBC in an interview that it wasn't just what Microsoft did, but what his rivals didn't do that let Microsoft get ahead.
"Most of our competitors were very poorly run," he tells Fiona Bruce, for The Money Programme.
"They did not understand how to bring in people with business experience and people with engineering experience and put them together. They did not understand how to go around the world."
