small office, to here and here and now to this sprawling campus. we talk about the future of facebook, the word we keep hearing is mobile. when did you guys know of years ago. we instituted all of these rules in the company, like whenever we show our products to each other, we need to start with the mobile version. >> but the future of facebook may look different. you might see a variety of apps created by the company. >> we have facebook, instagram messenger. we just announced paper, which is a more immersive way at looking at your news feed. >> reporter: a challenge for the company will be continuing to grow at such a rapid pace. they are starting to saturate the internet-connected world. >> there's going to be a lot more people with their first computer and first phone and first access to the internet and