that one wasn't hard to figure out.... my most recent favorite was a Samsung Blu-Ray player service manual. the fluorescent display had the initials for "Fluorescent Unit", and the serial clock that went to it (yes, they did, they used the standard "CK" abbreviation for clock....) and the full name of the signal was Fluorescent Unit ClocK, and everywhere that wire went on the schematic had that abbreviation on it... this is what happens when you translate stuff into a language you don't know very well...