It's an impossibly subjective decision. However, I agree that their #2 - the microchip/transistor - has had a greater impact on the world than the Internet. FW

It's an impossibly subjective decision. However, I agree that their #2 - the microchip/transistor - has had a greater impact on the world than the Internet. FWIW, they list HTML and email but not the internet specifically. I also think their data is wrong for the "U.S. passports in circulation." According to http://travel.state.gov/content/passports/english/passports/statistics.html http://travel.state.gov/content/passports/english/passports/... , in the 10 years before 1989 there were 40-50 million passports issued, and not the paltry ~2 million shown on the graph. I think that are incorrectly showing a simple cumulative sum of the number of issued passports.