It's fantastic that Microsoft in the cloud space is one of very few companies that's got the critical mass, the particular emphasis on helping business customers get up to that cloud with all the unique requirements they have. It's very exciting.

In three years, every product my company makes will be obsolete. The only question is whether we will make them obsolete or somebody else will.

As I see it, there are two great forces of human nature: self-interest, and caring for others. Capitalism harnesses self-interest in a helpful and sustainable way, but only on behalf of those who can pay. Government aid and philanthropy channel our caring for those who can't pay. But to provide rapid improvement for the poor we need a system that draws in innovators and businesses in a far better way than we do today.

For all these infectious diseases, the goal is to eventually get rid of them. And to do that we need to invent new tools, but nobody was doing that because there was no money to buy on behalf of the poorest, even the existing tools.

Until we're educating every kid in a fantastic way, until every inner city is cleaned up, there is no shortage of things to do.

People are always coming up to me and saying, 'I heard your dad's speech, and it's really great.' And they'll mention some place I didn't even know my dad was going to.

The greatest thing you can do for your competition - hire poorly.