Module Modules are lightweight and flexible extensions used for page rendering. These modules are often “boxes” arranged around a component on a typical page. A well-known example is the login module. Modules are assigned per menu item, so you can decide to show or hide (for example) the login module depending on which page (menu item) the user is currently on. Some modules are linked to components: the “latest news” module, for example, links to the content component (com_content) and displays links to the newest content items. However, modules do not need to be linked to components; they don't even need to be linked to anything and can be just static HTML or text. Modules are managed in the Joomla! Administrator view by the Module Manager. Joomla default modules: Archived Articles? Articles – Newsflash Articles – Related Articles Articles – Categories Articles Category Banners? Breadcrumbs Custom HTML Random Image Search? Statistics Syndication Feeds Feed Display Footer? Language Switcher Latest News Latest Users Login? Menu? Most Read Content Weblinks Who’s Online Wrapper Reference: http://docs.joomla.org/Glossary
Article In Joomla! an Article is a piece of content consisting of text (HTML), possibly with links to other resources (for example, images). Articles are the basic units of information in the content system and the bottom level in the content hierarchy. Since Joomla! 2.5 , each Article is in exactly one Category. A Category can be in another Category making it a sub Category. It is also possible to have Uncategorised Articles. These articles exist without being associated with any Category. Before Joomla! 2.5 and earlier versions, an Article was the third level in the hierarchy Sections ? Categories ? Articles. Now an Article is a bottom level and will alway be the second level or greater in hierarchy. Category ? Articles Category ? sub Category ? Articles Category ? sub Category ? sub Category ? Articles Articles are maintained using the Article Manager (see the Content Article Manager for or the Content Article Manager for ) which can be reached in the Administrator (Back-end) by clicking on the Content menu, then the Article Manager menu item. Reference: http://docs.joomla.org/Glossary