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ThePortland Pattern Repository (PPR) is an online repository forcomputer programmingsoftware design patterns. It was accompanied by the websiteWikiWikiWeb, the world's firstwiki. The repository has an emphasis onextreme programming, and is hosted by Cunningham & Cunningham (C2) ofPortland, Oregon.[1] The PPR'smotto is "People, Projects & Patterns".
On 17 September 1987, programmerWard Cunningham withTektronix andApple Computer'sKent Beck co-published the paper "Using Pattern Languages for Object-Oriented Programs"[2] This paper, about software design patterns, was inspired byChristopher Alexander's architectural concept of "patterns"[2] It was written for the 1987OOPSLA programming conference organized by theAssociation for Computing Machinery. Cunningham and Beck's idea became popular among programmers because it helped them exchange programming ideas in an easy to understand format.
Cunningham & Cunningham, the programmingconsultancy that would eventually host the PPR on its Internet domain, was incorporated inSalem, Oregon, on 1 November 1991, and is named after Ward and his wife, Karen R. Cunningham, a mathematician, school teacher, and school director. Cunningham & Cunningham registered their Internet domain,c2.com, on 23 October 1994. Ward created the Portland Pattern Repository onc2.com as a means to helpobject-oriented programmers publish their computer programming patterns by submitting them to him. Some of those programmers attended theOOPSLA andPLoP conferences about object-oriented programming, and posted their ideas on the PPR. The PPR is accompanied, onc2.com, by the first everwiki, a collection of reader-modifiable Web pages, which is namedWikiWikiWeb.[3]