Drupal is an open-source CMS (Content Management System) framework designed to power complex websites. The standard Drupal Core installation comes with such content management features as integrated system administration, account registration and maintenance, menu management, dynamic, customizable page design, and a taxonomy system that enables users to organize and tag content. Drupal’s extensible architecture can implement a wide range of modules that provides everything from administrative functionalities like access control and integration with third-party tools to content-based features like image galleries and user forums. Drupal also includes auto-update notifications for modules, themes, security patches, and new versions of Core, while its robust user community provides support, as well as new modules and themes. Whitehouse.gov, Sony Music, and Harvard University are just a few of the many organizations that use Drupal to power their online presence.