Spock (website)
Spock was a U.S. search website specialized in finding people; also known as a vertical search engine or entity search engine. The name "Spock" is a backronym: "single point of contact (by) keyword." Founded in 2006 by Jay Bhatti and Jaideep Singh, it "indexed over 250 million people representing over 1.5 billion data records." These records were from publicly available sources, including Wikipedia, IMDb, ESPN, LinkedIn, Hi5, MySpace, Friendster, Facebook, YouTube, Flickr, Twitter, corporate biographies, university faculty and staff pages, real estate agents sites, school alumni and member directory pages, etc. The company maintained that "30% of all  Internet searches are people-related". As entity resolution is the main algorithmic hurdle of their indexing endeavour, Spock issued and awarded the Spock Challenge Prize. The winning entry combines various machine learning algorithms. Spock opened its service to public beta on August 8, 2007. On April 30, 2009, Spock was acquired by Intelius.