GNU/Linux
Posted on Wednesday, 12 May 2021
"GNU/Linux and the family of operating systems made from the GNU
system, developed by the same project, introduced the Linux
kernel. It is one of the most well-known examples of free
software and open source software: according to proprietary
operating systems such as Windows and Mac OS, all source code is
available to the public and the world can freely use, change and
redistribute."