The document discusses using social networks for research purposes. It defines technical computer networks and social networks. It then summarizes the GVU surveys from 1994-1997 which were some of the earliest online surveys and helped establish web demographics. It also describes the rise of social media/networking sites from 1997-2006 like SixDegrees, LiveJournal, LinkedIn, MySpace and Facebook. It provides examples of using social networks like Facebook polls, LinkedIn answers and Twitter for real-time feedback and market research.