Linux
Linux or (less commonly known as) GNU/Linux is a hugely popular Unix-like computer operating system. Linux is one of the most prominent examples of free software and open source development; typically all underlying source code can be freely modified, used, and redistributed by anyone. The name "Linux" comes from the Linux kernel started in 1991 by Linus Torvalds. The system's utilities and libraries usually come from the GNU operating system, started in 1983 by Richard Stallman.
Predominantly known for its use in servers, Linux is supported by corporations such as Sun Microsystems, Red Hat, Hewlett-Packard, IBM, Novell and the Oracle Corporation. It is used as an operating system for a wide variety of computer hardware, including desktop computers, supercomputers, video game systems, such as the PlayStation 2 and PlayStation 3, several arcade games, and embedded devices such as mobile phones and routers.
Linux® is the registered trademark of Linus Torvalds in the U.S. and other countries.