I like to tell people that all of our products and business will go through three phases. There's vision, patience, and execution.

Great companies with the way they work, first start with great leaders.

If you look at companies with upside potential, Twitter's right there. They've established a brand in a world where it's extremely difficult to establish a brand. It's a global brand, people recognize it, people want to let you know what their Twitter handles are, etc.

It's always great when you get a lot of people pushing themselves to do better, be better, invent better, better serve, better lead customers in new directions.

At Microsoft, we're investing heavily in security because we want customers to be able to trust their computing experiences, so they can realize the full benefits of the interconnected world we live in.

My wife spent a lot of time on what we do from a civic contribution giving perspective, for a number of years, I've really joined her in that. We're focused on issues in the United States, particularly issues with people who have been trapped in neighborhoods in what I might call intergenerational poverty.

What we've gone through in the last several years has caused some people to question 'Can we trust Microsoft?' .