I know there's a farmer out there somewhere who never wants a PC and that's fine with me.

'I don't know' has become 'I don't know yet'.

Security guys break the Mac every single day. Every single day, they come out with a total exploit, your machine can be taken over totally.

It’s been proven that of all the interventions to reduce poverty, improving agricultural productivity is the best.

If we [the USA] don't innovate in education, it's literally going to mean less people get to go have that education at a time when more people are going to want it. We've got to put courses out on the Web, we've got to put interactive learning out on the Web.

My experience of malaria was just taking anti-malarials, which give you strange dreams, because I don't want to get malaria.

The Gates Foundation has learned that two questions can predict how much kids learn: 'Does your teacher use class time well?' and, 'When you're confused, does your teacher help you get straightened out?'