Extensions
This Module displays a random image from your chosen image directory. Help
This Module displays other Articles that are related to the one currently being viewed. These relations are established by the Meta Keywords.  All the keywords of the current Article are searched against all the keywords of all other published articles. Help
This module will display a search box. Help
The search component proviedes basic search functionality for the information contained in your core components. Many third part extensions also can be searched by the search component. Help
The search component uses plugins to control which parts of your Joomla! site are searched. You may choose to turn off some areas to improve performance or for other reasons. Many third party Joomla! extensions have search plugins that extend where search takes place.
Default On:
- Content Help
- Contacts Help
- Weblinks Help
- News Feeds Help
- Categories Help
زیر مجموعه ها
Components
Components are larger extensions that produce the major content for your site. Each component has one or more "views" that control how content is displayed.In the Joomla! administrator there are additional extensions suce as Menus, Redirection, and the extension managers.
Modules
Modules are small blocks of content that can be displayed in positions on a web page. The menus on this site are displayed in modules. The core of Joomla! includes 17 separate modules ranging from login to search to random images. Each module has a name that starts mod_ but when it displays it has a title. In the descriptions in this section, the titles are the same as the names.
Templates give your site its look and feel. They determine layout, colors, type faces, graphics and other aspects of design that make your site unique. Your installation of Joomla comes prepackaged with four templates. 
Plugins are small task oriented extensions that enhance the Joomla! framework. Some are associated with particular extensions and others, such as editors, are used across all of Joomla!. Most beginning users do not need to change any of the plugins that install with Joomla!. 
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