The Portland Pattern Repository (PPR) is the subdirectory c2.com/ppr of the commercial Internet domain c2.com, which belongs to the company Cunningham & Cunningham (C2) from Portland, Oregon. The PPR stores computer programming design patterns, with an emphasis on extreme programming. The PPR's motto is "People, Projects & Patterns", which in the PPR's camel case is spelled "PeopleProjectsAndPatterns". In computing, a directory, catalog, or folder, is an entity in a file system which contains a group of files and other directories. ... C2 or C-2 can refer to: Vitamin C2, a name sometimes used for Choline. ... Portland is the largest city in the U.S. state of Oregon, and county seat of Multnomah County. ... In software engineering, a design pattern is a general solution to a common problem in software design. ... Extreme Programming (XP) is the most popular of several agile software development methodologies used to implement software engineering projects. ... A motto is a phrase or a short list of words meant to formally describe the general motivation or intention of a social group or organization. ... CamelCase is a common name for the practice of writing compound words or phrases where the words are joined without spaces, and each word is capitalized within the compound. ...

Back on September 17, 1987, programmer Howard G. Cunningham (Ward) of Tektronix co-published with Apple Computer's Kent Beck the paper Using Pattern Languages for Object-Oriented Programs about programming patterns, inspired by architect Christopher Alexander's architectural concept of "patterns", for the 1987 OOPSLA programming conference organized by the Association for Computing Machinery. Cunningham's and Beck's idea became popular among programmers, because it helped them exchange programming ideas in a format that is easy to understand. Ward Cunningham Howard G. Cunningham (born May 26, 1949) is a computer programmer and is best known as the prime inventor of WikiWikiWeb and one of the pioneers in patterns and Extreme Programming. ... Tektronix is a United States corporation that is currently a major presence in the test, measurement, and measuring industry. ... Apple Computer Inc. ... A professor-emeritus (the University of California, Berkeley) and licensed contractor as well as architect, Christopher Alexander (born October 4, 1936 in Vienna, Austria) is noted for his design of building complexes in California, Japan, and Mexico. ... OOPSLA (Object-Oriented Programming, Systems, Languages & Applications) is an annual ACM conference. ... The Association for Computing Machinery, or ACM, was founded in 1947 as the worlds first scientific and educational computing society. ...

Cunningham & Cunningham, the programming consultancy which would later host the PPR on its Internet domain, was incorporated at the Oregon Secretary of State's Corporation Division of Salem, Oregon, on Novermber 1, 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 October 23, 1994. State Capitol building in Salem Salem (IPA: ) is the capital of the state of Oregon in the United States of America, and county seat of Marion County. ...

On c2.com, Ward created the Portland Pattern Repository as a means to help object-oriented programmers publish their computer programming patterns by submitting them to him. Some of those programmers attended the OOPSLA and PLoP conferences about object-oriented programming (OOP), which are well-known among object-oriented programmers, and posted their ideas on the PPR and exchanged e-mail messages with Ward. In computer science, object-oriented programming, OOP for short, is a computer programming paradigm. ...

The PPR is accompanied on c2.com by the first ever wiki (a collection of reader-modifiable Web pages), which is called WikiWikiWeb, or simply WikiWiki or Wiki (with a capital 'W'), and which is located at c2.com/cgi/wiki. Wikibooks has more about this subject: Wiki Science A wiki (IPA: <wee-kee> or <wick-ey> (according to Ward Cunningham) is a type of website that allows users to add and edit content and is especially suited for constructive collaborative authoring. ... The WikiWikiWeb, or simply WikiWiki or Wiki (with a capital W), is the first ever wiki (a collection of reader-modifiable Web pages). ...

External links

• Portland Pattern Repository
• The Pattern Languages of Programs Conference
• OOPSLA