Collective Intelligence - Google

According to Wikipedia, Collective Intelligence is a shared or group intelligence that emerges from the collaboration and competition of many individuals and appears in consensus decision making in bacteria, animals, humans and computer networks. Google harnesses Collective Intelligence through its PageRank (http://en.wikipedia.org/wiki/PageRank) algorithm. As the name implies, it utilizes a special system that ranks sets of hyperlinked documents based on their relevance. Basically, the greater number of links to a specific website, the higher that website gets ranked by Google. Using this algorithm, Google is able to gather information from all over the Web, thereby harnessing Collective Intelligence.