Linux is an open-source operating system originally developed for personal computers using Intel x86 processors. It has since been ported to many other hardware platforms and is now widely used on servers, supercomputers, embedded systems, mobile devices, and more. Linux development is a prominent example of collaborative open-source software development, with its source code freely available under licenses like GPL. Popular Linux distributions for desktop and server use include Debian, Linux Mint, Fedora, openSUSE, Arch Linux, and commercial versions from Red Hat and SUSE.