Re: Xerox photcopiers
Even worse old washing machines!!
who knew the secret codes of the A wash C wash 1 wash all on the rotary mechanical dial.
Clothes say 40c colour wash
washing machine required the square root of Pi the blood of a virgin in the pre wash tray whichever one that was.
Usually ended up with boiled shrunk laundry soaking wet because it didn't have the spin cycle enabled..