Communications is the biggest driver of frequency of use of anything. Think about how many times a day you check your email on your phone or text someone or message someone.

I took a computer-science course to fill a prerequisite at Stanford, and I realized that every day was a new problem, and every day you got to think about how to solve something new, how to reason through something new, how to develop an algorithm to solve for something you hadn't worked on before.

I definitely think what drives technology companies is the people; because in a technology company it's always about what are you going to do next.

I always did something I was a little not ready to do. I think that's how you grow. When there's that moment of 'Wow, I'm not really sure I can do this,' and you push through those moments, that's when you have a breakthrough.

I can imagine an operating system that some day does a better job storing your data, using (a) network.

Select for you keyboard, just like doing a text message, so everybody who does text messaging on their cell phone, it's the same idea.