The document discusses content management systems (CMS). It defines a CMS as a web-based application that allows non-technical users to create, manage, store, edit and publish large amounts of content without programming skills. It lists popular CMS like Drupal, Joomla, and WordPress. The document outlines the main components of a CMS including content, management, and system. It also discusses the types of CMS and their features and benefits for managing website content.