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A commercial software team contributed to an open source implementation of the Windows API on X-Windows and Unix. Wine is an open source implementation of the Windows API, a compatibility layer that lets native windows programs run on X-Windows and Unix. With our contribution filling in some gaps, our client planned to include Wine with a slightly modified product. Expecting chaos in the organization and code, the team instead found a structured community with procedures all its own. The version control tool on the Wine team is CVS (concurrent version system), an open source, network-transparent version control system. Patches on Wine are relatively small, which makes them easier to review and less risky to add to the source tree.
S. Lussier (Thu,) studied this question.