When Paul Allen and I started Microsoft over 30 years ago, we had big dreams about software. We had dreams about the impact it could have.

The concept of this so-called "TerraPower reactor" is that you, in the same reactor, you both burn and breed. So, instead of making plutonium and then extracting it, we take uranium - the 99.3 percent that you normally don't do anything with - we convert that, and we burn it.

People care a lot that the USA is well run, and people globally expect us to do things in upgrading science and more.

I want to admit that I am an optimist. Any tough problem, I think it can be solved.

Steve Jobs' ability to focus in on a few things that count, get people who get user interface right, and market things as revolutionary are amazing things.

We'll have infinite bandwidth in a decade's time.

In programming when you're making a change you have to know all the affected places, and you have to be able to model in your head what the performance impact will be.