text: The CentOS Project provides several additional repositories that contain software packages not provided by the default base and updates repositories. Those repositories include the following:
  CentOS Extras : contains packages that provide additional functionality to CentOS without breaking its upstream compatibility or updating the base components.
  CentOSPlus : contains packages that actually upgrade certain base CentOS components, changing CentOS so that it is not exactly like the upstream provider's content.
  CentOS-Testing : serves as a proving ground for packages on their way to CentOSPlus and CentOS Extras. Offered packages may or may not replace core CentOS packages, and are not guaranteed to work properly.
  CentOS-Fasttrack : contains bugfix and enhancement updates issued from time to time, between the regular update sets for point releases. The packages released this way serve as close candidates for the inclusion into the next point release. This repository does not provide security updates, and does not contain packages unsuitable for uncertain inclusion into point releases.
  CR (Continuous Release) : makes generally available packages that will appear in the next point release of CentOS. The packages are made available on a testing and hotfix basis, until the actual point release is formally released in form of ISO images.