Should surveillance be usable for petty crimes like jaywalking or minor drug possession? Or is there a higher threshold for certain information? Those aren't easy questions.

Whenever you have multiple devices including multiple PCs that you want to share information with, it's always been a bit complicated.

(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.

We need to get a broader awareness. People say climate change is really bad, but painting that picture of what you're putting at risk.

The typical project design time for a large company like IBM - and they keep track of this - is a little over four years.

Investing in innovation, which was my broad theme talking to [Warren Buffett ], that included health vaccines, it included energy and education.

One thing I've always loved about the culture at Microsoft is there is nobody who is tougher on us, in terms of what we need to learn and do better, than the people in the company itself. You can walk down these halls, and they'll tell you, 'We need to do usability better, push this or that frontier.'