The most important work I got a chance to be involved in, no matter what I do, is the personal computer... I even knew not to get married until later because I was so obsessed with it. That's my life's work.

Even in some of our vaccine areas, like an AIDS vaccine, things have taken longer than we expected, but we have the pipeline of tools. The biological information that we have that gives us insights is fantastic.

Flying cars are not a very efficient way to move things from one point to another.

Now, we put out a lot of carbon dioxide every year, over 26 billion tons. For each American, it's about 20 tons. For people in poor countries, it's less than one ton. It's an average of about five tons for everyone on the planet. And, somehow, we have to make changes that will bring that down to zero.

Good developers like seeing their products sell in large quantities. They enjoy the competition of doing a better job than the other company, especially if the other company has more people on the project and they're entrenched and people are saying that we don't have a chance of getting in there and... and doing well.

Microsoft is a company that manages imagination.

People often overestimate what will happen in the next two years and underestimate what will happen in ten.