MediaWiki is a free and open-source wiki software platform developed by the Wikimedia Foundation. It is best known as the software that powers Wikipedia and many of its sister projects, but it is also widely used by organizations and communities to collaboratively create and manage content. MediaWiki is written in PHP and uses a backend database such as MySQL or MariaDB. It supports version control, user management, and an extensive system of extensions and templates, making it highly customizable for various collaborative documentation needs. Its robust permission and revision history systems help ensure content integrity and transparency.