I remember thinking quite logically that I didn't want to spoil my children with wealth and so that I would create a foundation, but not knowing exactly what it would focus on.

Software is a great combination between artistry and engineering. When you finally get done and get to appreciate what you have done it is like a part of yourself that you've put together. I think a lot of the people here feel that way.

There's a lot that can be done for people who are using technology in a better way.

The key thing you can do to reduce population growth is actually improve health.

The huge turnout for Live 8 here and around the world proves that thanks to the leadership from people like Tony Blair and Gordon Brown the world is beginning to demand more action on global health and poverty.

With tech companies, whoever's the leader is always questioned, you know. They say, 'Is this the end of them?' And - there's more - more times people think that's the case than it really is the case.

The idea of explaining why free trade is good, why immigration is good, why the world is so connected, that we need to think in terms of humanity and being generous to each other, you know, that's proving to be a challenge.