What is the meaning of GNU?

Question

GNU? What is that? All I know about it is, it is about Linux (or unix).. (I dont really know sorry)

Answer 1

GNU's Not Unix.  

The GNU public license (GPL)  is a license that many open source projects use.  It is not limited to *nix programs though.  There are many programs for OS X and even Windows that are licensed under the GPL.  

These software are often community developed projects. Any user is allowed to edit the source and make their own adjustments/improvements.

Answer 2

It's basically in the words of wikipedia " is a computer operating system composed entirely of free software." GNU stands for "GNU's Not Unix"  

Answer 3

It's a circular acronym:

GNU is

Not

Unix