Let's take a trip back in time and discover the history of social networking, and how it grew, one step at a time. From the first sent mail until today!
History of Social Networking
BBC World Service - Witness History, Six Degrees - the first online social network
The History of Social Networking timeline
Twitter - Wikipedia
History Of Social Networking: How It All Began
The History of Social Media Since 2003
The history of social networks: how it all began
The Evolution of Social Media: How Did It Begin, and Where Could It Go Next?
The Evolution of Social Media - How Did It Begin and Where Could It Go Next, PDF, Social Media Marketing
History Of Social Networking: How It All Began
Then and now: a history of social networking sites