Funny story with this ...
At work I found a Model M and started using it. I am a 'keyboarder' and not a 'mouser' ... I cant function without the windows key.
However, a lot of the applications I use, require pause and scroll lock.
First thing I did was remap the right control and alt keys to be windows key and context menu keys.
I ended up remapping a few other things.
Few months later, I got a new coworker and he was given my old computer. Not a problem for me; I just attached the model M to the new computer and set up my key maps.
He still uses my old computer and sometimes gets confused by the odd things it does. Switched out 3 or 4 keyboards, too.