A centralized version control system is based on a single server that holds the files and lets people check in and check out the changes that are made to those files. The principle is quite simple—everyone can get a copy of the files on his/her system and work on them. From there, every user can commit his/her changes to the server. They will be applied and the revision number will be raised. The other users will then be able to get those changes by synchronizing their repository copy through an update.
As the following diagram shows, a repository evolves through all the commits, and the system archives all revisions into a database in order to be able to undo any change, or provide information on what has been done and ...
