The barrier to change is not too little caring; it is too much complexity. To turn caring into action, we need to see a problem, see a solution, and see the impact. But complexity blocks all three steps.

The need to communicate effectively with your customers will come up again and again.

The Chinese are clearly inculcating the idea that science is exciting and important, and that's why they, as a whole-they're graduating four times as many engineers as we are, and that's just happened over the last 20 years.

Bioterrorism is like earthquakes, you should think in order of magnitudes. If you can kill 10 people that's a one, 100 people that's a two... Bioterrorism is the thing that can give you not just sixes, but sevens, eights and nines.

U.K. companies are in very international and very competitive markets. If you look at PC penetration in the U.K., it is very similar to the United States market.

About three million computers get sold every year in China, people don't pay for the software. Someday they will, though. And as long as they're going to steal it, we want them to steal ours. They'll get sort of addicted, and then we'll somehow figure out how to collect sometime in the next decade.

As for drugs - well, Gates was certainly not unusual there. Marijuana was the pharmaceutical of choice.