Windows 8 is key to the future, the Surface computer.

Headlines, in a way, are what mislead you because bad news is a headline, and gradual improvement is not.

Microsoft has had its success by doing low-cost products and constantly improving those products and we've really redefined the IT industry to be something that's about a tool for individuals.

Expectations are a form of first-class truth: If people believe it, it's true.

Philanthropy should be taking much bigger risks that business. If these are easy problems, business and government can come in and solve them.

A fundamental new rule for business is that the Internet changes everything.

I've been studying how quickly we can get energy out to the poor countries - a lot of which are in Africa - and how little progress we've made there. There's no more electricity today in sub-Saharan Africa per person than there was 20 years ago.