Drupal is a free and open-source web content management system (CMS) written in PHP and distributed under the GNU General Public License. It provides an open-source back-end framework for at least 14% of the top 10,000 websites worldwide and 1.2% of the top 10 million websites, ranging from personal blogs to corporate, political, and government sites. Drupal is also described as a web application framework and meets most of the generally accepted feature requirements for such web frameworks. Drupal is easy to install and is highly accessible, and it supports multilingual content and provides a multilingual UI. Drupal is collaborative by design, enabling users to create content and collaborate on content creation, site administration, and other tasks. Drupal is also a powerful website development platform that adheres to modern object-oriented programming patterns, PHP best practices, HTML5 and YAML standards. Drupal is used by millions of people and organizations around the globe to build and maintain their websites, online directories, e-commerce stores, intranets, and other types of digital content. Drupal is also a favorite for large, complex websites, and it is the platform of choice for many universities and colleges, government agencies, healthcare institutions, and non-profits.