The early personal computers were not very powerful so the idea of feeding their program into a small amount of memory requires immense skill.

Personal computing today is a rich ecosystem encompassing massive PC-based data centers, notebook and Tablet PCs, handheld devices, and smart cell phones. It has expanded from the desktop and the data center to wherever people need it - at their desks, in a meeting, on the road or even in the air.

People are building the software and so having the pieces be such that a single person understands all the tradeoffs and everything that's going on in a piece is extremely valuable. It avoids getting into an experimental mode where you're just trying things out. That never works.

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.

If we have optimism without empathy then it doesn't matter how much we master the secrets of science. We're not really solving problems, we're just working on puzzles.

Only through focus can you do world-class things, no matter how capable you are.

You're never going to get the amount of CO2 emitted to go down unless you deal with the one magic metric, which is CO2 per kilowatt-hour.