Learning from mistakes and constantly improving products is a key in all successful companies.

Software is more important than hardware.

Digital reading will completely take over. It's lightweight and it's fantastic for sharing. Over time it will take over.

I've been studying how quickly we can get energy out to the poor countries - a lot of which are in Africa - and how little progress we've made there. There's no more electricity today in sub-Saharan Africa per person than there was 20 years ago.

The general idea of the rich helping the poor, I think, is important.

More and more software would just increase the number of tasks that the computer would help solve.

How much further beyond basic research the role of the government should be, you could have a really good debate about it. Almost nobody would say it's zero. But that's where at least we need the private sector to play a big role.