The Joomla! CMS is a PHP-based system for creating dynamic web pages. The CMS contains built-in functionality for managing and displaying HTML content items as well as a variety of data such as contacts and web links. Additionally, its flexible and extensible structure allows functionality to be added using extensions.
In 2011, the underlying libraries were collected and released as the Joomla! Platform. The Joomla! project was split up and the Platform is now being developed as a separate project. The Joomla! CMS project uses the Platform releases as a framework to build the CMS on.
The home of the Joomla! CMS project is Joomla.org, which contains end-user information. The joomla/joomla-cms GitHub repository contains the source code, while the bug tracker and this documentation wiki are operated separately.