TYPO3 is a free and open source enterprise level content management system. It is written in PHP. It has become a wide spread content management systems (CMS) on the web and in intranets.
TYPO3 has two operating modes: a frontend, which presents a TYPO3 based website to its users, and a backend, used by authors and site administrators to manage content for the website. The backend is used with an ordinary web browser, so there is no special software needed to work on a TYPO3-based website.
