I have a nice office. I have a nice house... So I'm not denying myself some great things. I just don't happen to have expensive hobbies.

In poor countries, we still need better ways to measure the effectiveness of the many government workers providing health services. They are the crucial link bringing tools such as vaccines and education to the people who need them most. How well trained are they? Are they showing up to work?

In the old generation, if one kid bought a PlayStation 2 and the other kid bought an Xbox, at his house you played PlayStation, at your house you played Xbox. Now that it's online, all those early buyers who... you want to play with, they've got their reputation online of who they are and how good they are at these games.

A company needs to have good business reflexes, to be able to marshal its forces in a crisis or in response to any unplanned event.

If you think your teacher is tough, wait till you get a boss.

So we can simulate Richter-10 earthquakes. We simulate 70-foot waves coming into these things. Very cool. We basically say no human should ever be required to do anything, because if you judge by Chernobyl and Fukushima, the human element is not on your side.

We were young, but we had good advice and good ideas and lots of enthusiasm.