OkCupid (sometimes abbreviated as OKC) is an American-based international operating free online dating, friendship, and social networking website that features member-created quizzes and multiple-choice questions. The site supports multiple modes of communication, including instant messages and emails. OkCupid was listed in Time magazines 2007 Top 10 dating websites. The website was acquired by IACs Match.com division in 2011. OkCupid was initially owned by Humor Rainbow, Inc. OkCupids founders (Chris Coyne, Christian Rudder, Sam Yagan, and Max Krohn) were students at Harvard University when they gained recognition for their creation of TheSpark and, later, SparkNotes. Among other things, TheSpark.com featured a number of humorous self-quizzes and personality tests, including the four-variable Myers-Briggs style Match Test. SparkMatch debuted as a beta experiment of allowing registered users who had taken the Match Test to search for and contact each other based on their Match Test types. The popularity of SparkMatch took off and it was launched as its own site, later renamed OkCupid. The current OkCupid Dating Persona Test is still largely identical, in question and text blurb content and order, to the original Match Test. In 2001, they sold SparkNotes to Barnes & Noble, and began work on OkCupid.