WordPress is an open-source content management system, founded in 2003, and released through http://wordpress.org. It is one of the most popular content management systems with a marketshare of over 30% of the top 10 million websites around the world. Apart from just serving dynamic/static pages, WordPress also supports content types including: blogging, mailing lists, forums, media galleries, membership sites, learning management systems, and online stores.
WordPress can be installed manually after downloading the core files from http://wordpress.org, or can be installed autonomously through a number of hosting platforms.
WordPress uses a templating system to create a websites front-end called themes, and an architecture of add-on functionality called plugins.
Companies trust WordPress to power websites of every size, from small local stores to enterprise level corporations. Some notable companies that have used WordPress include: Spotify, People, CapitalOne, Microsoft, TED, Disney, ESPN, Facebook, Google, and many more.