By helping us to be more productive, technology lets us to spend less time focusing on survival, and more on solving other challenges.

The world is very disparate, in terms of the US using the most energy per person, and then the other rich countries - Europe, Japan, New Zealand - using about half of what we do, and then the world average being about a fifth of what we use, with China just now surpassing the world average.

In fact, that's where my vision of the coming digital opportunity is somewhat different from other people's. I divide it into three parts. One is the office. That's the one I'm most excited about and is the most concrete.

Microsoft is not about greed. It's about innovation and fairness.

This is not about trade, no one is a stronger supporter of capitalism and trade than I am. This is about sovereignty and whether a country has the right to set its own public health policies.

It's pretty amazing to go from a world where computers were unheard of and very complex to where they're a tool of everyday life.

Philanthropy, although it's tiny compared to the government, it's 2% of the US economy, which is the largest percentage, other than the Middle East.