WordPress, now the most popular content management system powering over 43% of websites, began as a fork of the blogging platform b2 in 2003. Founded by Matt Mullenweg and Mike Little, it rapidly evolved through key milestones like the introduction of plugins, themes, and a robust community infrastructure, supported by Automattic and the WordPress Foundation, driving its growth from a simple blogging tool to a versatile platform for building all types of websites.
https://webdesign.tutsplus.com/the-history-of-wordpress–cms-109137a