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Object-oriented programming expert and consultant, one of the leaders in refactoring, author of the book 'Refactoring: Improving the Design of Existing Code', Extreme Programming proponent. Many useful articles and links.

Website maintained by Martin Fowler, Chief Scientist, ThoughtWorks, and based on his Addison-Wesley book: news, online summaries of the book's refactorings, book errata; refactoring tools, some two dozen useful links.

Founded as a consortium of experts in Refactoring, objects, e-commerce, Patterns, Extreme Programming, flexible and adaptable systems; dedicated to helping organizations succeed with objects; evolved from Ralph Johnson Software Architecture group, University of Illinois.