When he was in his second year at Harvard, Mark started to create program for students. He wrote a program called CourseMatch, which allowed users to choose classes based on the popular choices of other students. He also started Facemash, which allowed users to compare two student photos and decide who was more attractive. The program became very popular, but the school administration shut it down, because they thought it was not a good thing to do.
In 2004, Mark along with some friends developed a site that allowed users to create their own profile, upload photos, and communicate with others. Facebook was run out of a dorm room at Havard. Soon Zuckerberg dropped out of college to devote himself full time to Facebook. Mark moved to Palo Alto, California, and by the end of 2004, the site had one million users. And the rest is history