A collection of related articles. Sub-categories start at one organiza- tional level below categories. Since Joomla 1.6, you may have as many levels of sub-categories as you please (called nested categories).
The highest user level in Joomla. Members of this group have super user permissions throughout the site. If anything can be done in a Joomla installation, the super user can do it.
The database managment system used by most Joomla installations and by most dynamic websites in the world.
