I have a simple algorithm, which is, wherever you see paid researchers instead of grad students, that's not where you want to be doing research.

Most of us carry at least one device, all the time, every day. In fact many of us would feel naked without our smartphone. It's hardly surprising mobile search queries - and mobile commerce - are growing dramatically across the world.

The ultimate search engine would basically understand everything in the world, and it would always give you the right thing. And we're a long, long ways from that.

The "Be good" concept also comes up when we design our products. We want them to have positive social effects.

For me, privacy and security are really important. We think about it in terms of both: You can't have privacy without security.

We understand the need to balance our short- and longer-term needs because our revenue is the engine that funds all our innovation. But over time, our emerging high-usage products will likely generate significant new revenue streams for Google as well as for our partners, just as search does today.

I really like using my Samsung (005930:KS) tablet. I previously used the Motorola Xoom for a while and liked that.