Happy birthday, Facebook! I’ve been an user and fan since its 2004 founding year. It was also the year I entered UC Berkeley as a freshman. Now that I think of it, part of my college experience has basically been defined by Facebook. I was talking about this to my friend the other day, and we can’t really imagine what college would be like without Facebook. It’s been a total of 5 years and as you can see in retrospect, a lot of changes have been made. When I joined, there were about 15 or so college networks. Now they have more than 150 million active users. Amazing.