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The Portland Pattern Repository (PPR) is the world's first wiki and repository for computer programming design patterns. The repository has an emphasis on extreme programming. It is hosted by Cunningham & Cunningham (C2) of Portland, Oregon, at http://c2.com/ppr/. The PPR's motto is "People, Projects & Patterns", which, in the camel case used by the PPR, is spelled "PeopleProjectsAndPatterns".