When I started Facebook from my dorm room in 2004, the idea that my roommates and I talked about all the time was a world that was more open.

I literally coded Facebook in my dorm room and launched it from my dorm room. I rented a server for $85 a month, and I funded it by putting an ad on the side, and we've funded ever since by putting ads on the side.

Facebook was not originally created to be a company. It was built to accomplish a social mission - to make the world more open and connected.

I'm trying to make the world a more open place.

The thing I really care about is the mission, making the world open.

The main Facebook usage is so big. About 20 percent of the time people spend on their phone is on Facebook.