Apache is a free and open-source cross-platform web server software.
CakePHP is an open-source web framework. It follows the model–view–controller (MVC) approach and is written in PHP.
PayPal is an online payments system that supports online money transfers and serves as an electronic alternative to traditional paper methods like checks and money orders.
PHP is a general-purpose scripting language used for web development.
Unix is a family of multitasking, multiuser computer operating systems.