Drupal (pronounced /ˈdruːpəl/) is a free and open source[1] Content Management System (CMS) written in PHP and distributed under the GNU General Public License.[2][3] It is used as a back-end system for many different types of websites, ranging from small personal blogs to Enterprise 2.0 collaboration and knowledge management uses to large corporate and political sites.[4] In October 2009, the administration of U.S. president Barack Obama adopted Drupal for the official Whitehouse.gov website.[5][6][7]
The standard release of Drupal, known as Drupal core, contains basic features common to most CMSs. These include the ability to register and maintain individual user accounts within a flexible and rich permission / privilege system, create and manage menus, RSS-feeds, customize page layout, perform logging, and administer the system. As installed, Drupal provides options to create a classic brochureware website, a single- or multi-user blog, an Internet forum, or a community website providing for User-generated content.
Drupal was also designed to allow new features and custom behavior to be added to extend Drupal's core capabilities. This is done via installation of plug-in modules (known as contrib modules) created and contributed to the project by open source community members. For this reason, Drupal is sometimes described as a content management framework.[2]
Although Drupal offers a sophisticated programming interface for developers, no programming skills are required for basic website installation and administration.[8]
Drupal can run on any computing platform that supports both a web server capable of running PHP version 4.3.5+ (including Apache, IIS, Lighttpd, and nginx) and a database (such as MySQL or PostgreSQL) to store content and settings.[3]
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