This page is about the website. How to upload a pdf to facebook page was built by Mark Zuckerberg.
It is owned by Facebook, Inc. Facebook has over one billion active users. These books help students get to know each other better. Facebook allows any users who are at least 13 years old to become users of the website.
It eventually opened for students at other universities. After that, it opened to high school students, and, finally, to anyone aged 13 and over. May 2011, there are 7. 5 million children under 13 with accounts.