Revision management.
The storage of multiple "images" of the development files that comprise an application, which can be shared by multiple developers. With revision management, you can get an "image"—a snapshot in time of the development process—and can re-create any file to the way it was at any point in time.
Revision.
The state of a project or product file at some point in time.
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PatrickEgan? - 18 Dec 2002