"Dont worry youngsters, you'll never have to worry about the wierd n wonderful stuff on old keyboards like "Refresh" :)"
We still have to wonder why modern keyboards have "Break", "Pause", and "SysRq". Maybe they are there so Microsoft have an excuse. "It's slow coz you accidentally hit the Pause key." "Whatever you do, never hit the Break key, coz then you get to keep both halves.".
Oh look, there's something old and crusty on my keyboard.