K to 12 is partly about babysitting the kids so the parents can do other things.

Vaccination is pretty special because you can do a vaccination campaign anywhere in the world. All you are doing is gathering women from the villages, getting them the vaccines and asking them to go around and find the children.

There's only one trick in software, and that is using a piece of software that's already been written.

At some point, that risk-taking private capital can take over, and have patents and trade secrets and things that let them lead the way, which happened with the steam engine and some other things, although with energy, the time of adoption is a lot longer than it is with, say, IT products or even medical advances, like drugs and vaccines.

People who feel the world is tilted against them will spawn the kind of hatred that is very dangerous for all of us. I think it's a healthy sign that there are demonstrators in the streets. They are raising the question of 'is the rich world giving back enough?'

People everywhere love Windows.

Sometimes we do get taken by surprise. For example, when the Internet came along, we had it as a fifth or sixth priority. It wasn't like somebody told me about it and I said, "I don't know how to spell that." I said, "Yeah, I've got that on my list, so I'm okay." But there came a point when we realized it was happening faster and was a much deeper phenomenon than had been recognized in our strategy.