Sorghum is kind of unusual. It can go to very high heats, but it's not as productive in most environments as maize is.

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

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.

Customers want high quality at low prices and they want it now.

Microsoft has had many, many successful products. I'm committed to one company. This is the industry I've decided to work in.

I have been struck again and again by how important measurement is to improving the human condition.

I don't have a magic formula for prioritizing the world's problems.