For a highly motivated learner, it's not like knowledge is secret and somehow the Internet made it not secret. It just made knowledge easy to find. If you're a motivated enough learner, books are pretty good.

I realized about 10 years ago that my wealth has to go back to society. A fortune, the size of which is hard to imagine, is best not passed on to one's children. It's not constructive for them.

You may have heard of Black Friday and Cyber Monday. There's another day you might want to know about: Giving Tuesday. The idea is pretty straightforward. On the Tuesday after Thanksgiving, shoppers take a break from their gift-buying and donate what they can to charity.

Microsoft has some assets like Office that have stayed strong and there's so much room for innovation in those.

With nuclear weapons, you'd think you would probably stop after killing 100million. Smallpox won't stop. Because the population is naïve, and there are no real preparations. That, if it got out and spread, would be a larger number.

Technology must be implemented as part of a thoughtful, holistic approach to education transformation that includes teacher training, relevant curricula, parental involvement, and programs for children that fill unmet needs for basics like nutrition and health care.

In low-income countries, the main problems you have is infectious diseases.