The GNU Project was launched in 1984 to develop a complete UNIX 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”, some say they are more accurately called GNU/Linux systems because of the suite of GNU tools they use.
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