What does a simple Joomla! installation include?

From Joomla! Documentation

If you simply install Joomla! without any modifications or extensions, the following (incomplete) list of features will be included.

   * Content component which allows creation and display of "content items" usually in the middle of the page.
   * Front page component, which displays multiple recent content items designated as "front page" in the content manager. Configurable for layout and number of items.
   * Weblinks component for entering and displaying a list of weblinks.
   * Media manager for uploading and managing images and other media.
   * User manager (administrative end) and user registration module (front end).
   * Newsflash module for displaying specific content items as "newsflashes."
   * Modules for latest items, most popular, and related items.
   * A simple poll component
   * A menu system
   * A choice of several templates for your site[/li]
   * Installers for third party extensions (templates, components, modules and plugins/mambots).
   * The TinyMCE wysiwyg editor. 1.5 Also includes xStandard Lite
   * Administrative interface for managing your site