We do have business relationships; we do licensing relationships, and people want to use Google services on top of Android. But in theory, you can use Android without Google.

We're excited by the success of WhatsApp on top of Android. Amazon brings services like Kindle on top of Android. It's a competitive world and a lot more complex than people realize. When you run a platform on scale, you have to make sure it's truly open. That way, not only do you do well, so do others.

Android was built to be very, very secure.

The core of what Google is about is bringing information to people.

Android was intended to be very customizable. And we welcome innovations.

Google teams have lots of autonomy, including from people like me.