"GNU, which is a recursive acronym that stands for GNU is Not Unix, first set out in 1984 to develop a Unix-like operating system as Free Software.
"It is now gearing up to provide a 'free' version of Mozilla's (not-so-free) Firefox browser. The GNU version is called IceWeasel and is part of the GNUzilla effort from GNU. The Free Software Foundation (FSF) is the principal sponsor of the GNU Project..."