Apache is a free and open-source cross-platform web server software.
PHP is a general-purpose scripting language used for web development.
Progressive Web Apps (PWAs) are web apps built and enhanced with modern APIs to deliver enhanced capabilities, reliability, and installability while reaching anyone, anywhere, on any device, all with a single codebase.
Sulu is the go-to CMS for back-end projects written within the PHP Symfony framework.
Unix is a family of multitasking, multiuser computer operating systems.