This document discusses PHP, MySQL, and WordPress. It provides an overview of each: PHP was created in 1994 and has evolved through several versions. It is a widely used open source scripting language that powers many popular websites. MySQL is a popular open source database that works well with PHP. WordPress is a free and open source content management system built with PHP and MySQL that powers over 60 million websites, making it the most popular blogging platform. It allows for easy publishing and management of content on the web.