TIMELINE OF SNS

1978 - 1993
-Bulletin board services and EIES ( Electronic Information Exchange Service)
-Server-Based

1995
-Classmate.com
-Web-based
-purpose for users to ties with former schoolmate

1997
-SixDegree.com
-focus on indirect ties, much more interactive with the public

1999-2001
-Epinions.com
-trust-based and friendship-based
-More control over the content and connectivity with the users
-Enable externally application to be used

2005
-Various SNS had adapted different languages
-Became a method of business strategy


Source:
http://en.wikipedia.org/wiki/Social_networking_sites