Before Graph Search: Facebook's Biggest Changes

In 2003, according to the pages of history, Mark Zuckerberg created Facemash by hacking into Harvard's online, private collection of student images. Zuckerberg faced expulsion after being charged with violating students' privacy and copyright, among others things.

Zuckerberg, who was allowed to remain a student, quickly learned that it was much easier to ask users for their private information, rather than take it from them. And thus Facebook was born.

Over the years, Facemash evolved into TheFacebook and then just Facebook. Though it began at Harvard, it eventually expanded to the rest of the Ivy League and then many more universities within the United States and Canada. In 2006, the company opened its doors to anyone within the United States.

The central focus of Facebook has remained relatively static over time: each person provided a profile picture, their friends and relationships, and what stuff they liked. Simple, sure, but over time Facebook quickly learned that its "social graph," as Zuckerberg called it, could be a powerful marketing tool to create profiles of users' interests. Injecting ads directly into the news feed didn't go so well, but over time, Facebook has slyly slid advertising back into the stream, and helped third-party sites show more relevant ads to their users, too.

Now, Facebook is poised to expand that graph even further with the Tuesday launch of Graph Search, a new way for Facebook users to find out more about what their friends like, where they've been, and more.

But Graph Search is not the first update to Facebook and it definitely won't be the last. Some changes to the social network have been major; such as the launch of "Timeline," which essentially made Facebook a digital history of your life. Others have been more subtle. Have any crossed the line? Tell us in the comments below, after you review some of the changes Facebook has made to your digital life.