Whether it's Google or Apple or free software, we've got some fantastic competitors and it keeps us on our toes.

This is a fantastic time to be entering the business world, because business is going to change more in the next 10 years than it has in the last 50.

The world won't care about your self-esteem. The world will expect you to accomplish something BEFORE you feel good about yourself.

Certainly, the Windows share of servers is strong.

I think given all the different imperatives - getting energy to Africa, security of energy, climate change, that we should be spending half as much as we spend on health, which will get you all the way up to $15 billion - the health people don't like it when things get compared to their number.

In low-income countries, getting to a health post is hard. It's very expensive.

We need to cooperate globally on epidemic preparedness and prevention in the same way we are cooperating globally to stop people from getting nuclear weapons.