Often you have to rely on intuition.

Software is definitely engineering. It's different in that we take on novel tasks every time. It's not like building a certain bridge that is virtually identical to some previous bridge or some previous building.

On my desk I have three screens, synchronized to form a single desktop. I can drag items from one screen to the next. Once you have that large display area, you'll never go back, because it has a direct impact on productivity.

I don't have a magic formula for prioritizing the world's problems.

I'm not an educator ... I'm a learner.

The government is there day in and day out, if you want all kids to have education, if you want to run courts, if you want to have an army, if you want to have roads, you've got to have the taxation system that funds everything that you expect.

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?'