Centralized Version Control Systems (CVCS)
- CVS, or Concurrent Versions System
 - Apache Subversion (aka. SVN)
 - Perforce
 - Rational Clear-Case (IBM) (Configuration Management)
 
- Central server holds everything (good/bad)
 - Easier administration, better control
 - Limited or no off-line work
 - Single point of failure.
 - Branching is easy in some cases (Subversion)
 - Merging is still a pain