Idea Man:

What's it like to start a revolution?How do you build the biggest tech company in the world?And why do you walk away from it all?Paul Allen co-founded Microsoft. Together he and Bill Gates turned an idea - writing software - into a company and then an entire industry. This is the story of how it came about: two young mavericks who turned technology on its head; the bitter battles as each tried to stamp his vision on the future; the ruthless brilliance and fierce commitment. And finally, Allen's extraordinary step in walking away from it all to discover what it is you do after you've already changed the world . . .