http://www.gnu.org/graphics/gnu-head-sm.jpg
GNU is not UNIX!
- GNU Operating System - Free Software Foundation
- Free as in Freedom
The GNU Project was launched in 1984 to develop a complete UNIX style operating system which is free software: the GNU system. (GNU is a recursive acronym for "GNU's Not UNIX"; it is pronounced "guh-noo".)
Variants of the GNU operating system, which use the kernel Linux, are now widely used; though these systems are often referred to as "Linux", they are more accurately called GNU/Linux systems.