It's really kind of cool to have solar panels on your roof.

Software substitution, whether it's for drivers or waiters or nurses ... it's progressing. ... Technology over time will reduce demand for jobs, particularly at the lower end of skill set. ... 20 years from now, labor demand for lots of skill sets will be substantially lower. I don’t think people have that in their mental model.

Any version of Windows is going to have lots of great new things that people use and things that are tough.

DNA is like a computer program but far, far more advanced than any software ever created.

It is a high bar to say that it's more fun than working on software because the work at Microsoft that both Melinda [Gates] and I did was thrilling. We were making breakthroughs and empowering people.

We're at the point now where the challenge isn't how to communicate effectively with e-mail; it's ensuring that you spend your time on the e-mail that matters most.

I didn't used to wear a watch. Now I have a SPOT watch, which I wear all the time.