At the top of the Linux tag wiki:
Linux is a Unix-like computer operating system
at the bottom:
Properly "Linux" is the operating system kernel, rather than the entire operating system
It's a mess, in my opinion. I know it's big naming holywar "linux vs gnu linux". Some people say "Linux" some people say "GNU Linux" but not freaking spaces and tabs in the same code!
What do you think about it? I personally respect GNU Linux but I don't understand how you call it Linux and then say that you call it not proper.