Linux ???
Linus Torvalds --- principal author of the Linux kernel
Linux is a widely ported operating system kernel
There is no "one" Linux desktop, but rather there is a pool of free and open-source software from which desktop environments and Linux distributions select components with which they construct a GUI implementing some more or less strict design guide. GNOME, for example, has its human interface guidelines as a design guide, which gives the human-machine interface an important role, not just when doing the graphical design, but also when looking at people with disabilities, and even when looking at security.
--From WiKiPedia