What is a Content Management System (CMS)?

Content management systems (CMS) allow a site owner to manage their web pages with an internet browser. For example, to maintain my CMS site I would open my web browser (Internet Explorer, Netscape or Safari), go to a web address such as www.mysite.com/administrator and complete my changes.
Mambo and Joomla has attracted many users due to its ease of use and the capability of installing more advanced features such as different templates, user permissions and logins, document and image uploading and management, RSS feeds, printable versions of pages, news flashes, blogs, forums, polls, calendars, website searching, language internationalization, just to name a few.