This document provides an introduction to Joomla, an open-source content management system (CMS). It discusses the history and evolution of Joomla, from its origins as Mambo to the current version, Joomla 3. Key features of Joomla 3 include being responsive for mobile devices, use of Bootstrap framework, integration of LESS CSS, a common user interface library for extensions, and a simplified three-step installation process. The document also covers installing Joomla using XAMPP local server software, and an overview of common Joomla components like articles, categories, modules and templates.