Investing in tomorrow's technology today is more critical than ever.

In programming when you're making a change you have to know all the affected places, and you have to be able to model in your head what the performance impact will be.

(Talking about his first computer) Like all kids we not only fooled around with our toys, we changed them. If you've ever watched a child with a cardboard carton and a box of crayons create a spaceship with cool control panels, or listened to their improvised rules, such as "Red cars can jump all others," then you know that this impulse to make a toy do more is at the heart of innovative childhood play. It is also the essence of creativity.

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.

I'm going to save my public voice largely for the issues where I have some depth.

If we have optimism without empathy then it doesn't matter how much we master the secrets of science. We're not really solving problems, we're just working on puzzles.

Windows 2000 already contains features such as the human discipline component, where the PC can send an electric shock through the keyboard if the human does something that does not please Windows.