Who decides what's in Windows? The customers who buy it.

When I say "an energy miracle," I mean that there will be some form of energy whose 24 hour cost really is competitive with hydrocarbons given, say, 20 years of learning curve. You invent it, then you look at how much its costs go down over the next 20 years, that it really beats hydrocarbons.

My job is about the most fun thing I do, but I have a broad set of interests, going places, reading things, doing things.

If Africa seeks prosperity, it must provide for the health and nutrition of all – including the poorest.

The U.S. and Canada are two generous governments and we reach out and partner with anyone who believes in foreign aid.

The truth of Moore's law has made remarkable things possible. On the software side, I think natural user interfaces in all their forms are equally significant.

[Africa] is the one continent where you still have a lot more young people than old people. So making sure they're healthy, good nutrition, good education. That'll be important for the world.