| Sumario: | The article focuses on revision-control software which can be used to track or manage collaboration on an evolving project. The architecture of the distributed computing software is based on self-contained sub-project development lines or branches that can be merged. The client-server models of Subversion and Concurrent Versions systems, the degree of freedom for end users, the peer-to-peer structure of distributed tools called Git and Mercurial, and the automatic debugging technique that was introduced by Git and uses a bisect command are discussed, as well as advice for selecting revision-control software.
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