In MATLAB 6.5 (R13), only source control systems that comply with the Microsoft Common Source Control standard (also referred to as SCC) are supported. If there is a compliant source control system installed on your machine, it will be listed in the Source Control options in the MATLAB Preferences dialog.
There are several vendors who provide and interface into Revision Control Systems (RCS), Concurrent Versions System (CVS), and other such tools using Microsoft Source Code Control API. Microsoft Visual SourceSafe provides one such interface layer.
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