What is a Joomla! Component?
"A (Joomla!) component is a kind of Joomla! extension.
Components are the main functional units of Joomla!; they can be seen as mini-applications.
An easy analogy would be that Joomla! is the operating system and the components are desktop applications.
Each component has one or more views that control how content is displayed." Source: Official Joomla! Documentation.
How to see which Components are installed
To see which components are installed, select the Components link from the menu at the top of your website's control panel.
Core & 3rd Party Components
The Joomla! CMS already contains a number of important pre-installed Core Components.
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