This document lists the lines of code for various software components that WordPress relies on including WordPress itself, MySQL, PHP, Apache, the Linux kernel, and Google Chrome. It also contains 423,759 lines of code for WordPress, over 2.8 million lines for MySQL, nearly 3.9 million lines for PHP, and over 1.8 million lines for Apache. The Linux kernel contains over 25.6 million lines of code which is the most complex component.