that start with the tech industry kind of in the dumps because of the dotcom boom and it ended with technology becoming most dominant cultural and social force in the world, the thing that is still with us and kind of changing everything about our lives even to this day. and it happened because of those inventions you mentioned. the iphone particularly, it gave us this future where we were always accessible, where we always had the internet with us. and social networking. that was the thing that made the internet -- turned it from a utility into basically just fun. everyone is on it because everyone else is on it and it's kiechbtd ma kind of the main public square now. >> i also think remember of the days of encyclopedias? now we have information at our fingertips, it's so accessible. but it wasn't just the gadgets that came to really define this tech explosions and the websites and the companies that made them. let's talk about the visionries that brought them to life, people like bill gates, steve