History
The roots of online social networking can be traced to the 1980s bulletin board systems (BBSs). These systems allowed users to log in—through very slow connections—to share software and data as well as send private messages and post to public message boards. Due to the high cost of the long distance calls that would be required to access BBSs in other parts of the world, most of these were very local communities.

Figure 4-1. Friendster was one of the first popular social networking sites.
The late '80s and early '90s saw the rise of the desktop applications CompuServe, Prodigy, and AOL. Far more feature-rich than BBSs, these systems allowed users to connect to the Internet and create personal profiles, post events, chat, and send public and private messages.
As the World Wide Web grew in popularity, social networking moved to web-based applications. The first wave was built for specific functions or audiences. In 1995, Classmates.com and Match.com were created; both remain fairly popular sites in their niche. In 1999, more targeted networks were launched, including BlackPlanet.com, MiGente.com, and AsianAvenue.com.
The modern era of social networks began in 2002, when Jonathan Abrams launched Friendster (see Figure 4-1). Inspired by Match.com, Abrams wanted Friendster to be a dating site that wasn't about dating. In what many consider to be one of the biggest financial mistakes ...
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