For anyone unfamiliar with free and open source version control systems (VCSs), Subversion has become the standard non-commercial VCS, replacing the old champ, Concurrent Versions system (CVS).

对于任何不熟悉免费的开源版本控制系统(VCS)的人来说，Subversion开始成为一种标准的非商业性质的VCS，取代了旧的并发版本系统(Concurrent Versions System, CVS)。

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One of the oldest version-control packages around is the Concurrent Versioning System (CVS).

Concurrent Versioning System (CVS)是最早的版本控制包之一。

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