I wanted to project myself forward to age 80 and say, 'OK, I'm looking back on my life. I want to minimise the number of regrets I have.' And I knew that when I was 80, I was not going to regret having tried this. I was not going to regret trying to participate in this thing called the Internet that I thought was going to be a really big deal.

I wanted to be able to build things. Actually, in college I built an inkjet printer out of Legos, because I wanted to be able to print really big images. I figured you could print really big posters really cheaply using inkjet cartridges. So I reverse-engineered the cartridge, and I built all the electronics and mechanics to drive it. Just sort of fun projects. I like to be able to do those kinds of things.

From a very early age, I also realized I wanted to invent things. So I became really interested in technology and also then, soon after, in business, because I figured that inventing things wasn't any good; you really had to get them out into the world and have people use them to have any effect.

I was lucky to be involved and get to contribute to something that was important, which is empowering people with software.

Whether it's Google or Apple or free software, we've got some fantastic competitors and it keeps us on our toes.

The advance of technology is based on making it fit in so that you don't really even notice it, so it's part of everyday life.