If you mean an MS DOS-programming Ninja, and then, yes he once was a Ninja. Then he was a Grandmaster in Windows. Now he is somewhat of a red belt in Philanthropy (see him make progress here <a href="http://twitter.com/BillGates" rel="nofollow">http://twitter.com/BillGates</a> ) with a blue belt in watching his former company make horrific mistakes. But MS is not dead yet, and he isn't either. Maybe he will get bored and take it over again one day.