As part of the Consumer Electronics Show next week in Las Vegas, Bill Gates is to answer questions put to him by readers of the BBC News website.  So if you want to know why he ever thought that *&^%$ paperclip was a good idea or what is the logic of pressing start to close a machine down, go ahead.  I’ve already sent one question in about his philanthropic foundation work on malaria in Africa.  The answers will be posted on the BBC news website.