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Joyce Park is co-founder and CTO of Renkoo, creators of the Booze Mail and Haikoo Zoo Facebook applications. Prior to Renkoo, Joyce was a member of the software engineering teams at Epinions, KnowNow, and Friendster. She is also active in the open source community, as a leader of the mod-pubsub project, founding member of Dojo Toolkit, and longtime PHP developer. Joyce studied history at the University of Chicago.