 This term is popular with technical support staff who have to deal with lusers as part of their job, often metaphorically employing a LART (Luser Attitude Readjustment Tool, also known as a clue-by-four, cluestick, or cluebat), meaning turning off the user's access to computer resources and the like.The Jargon File states that the word was coined around 1975 at MIT.Under ITS, when a user first walked up to a terminal at MIT and typed control-Z to get the computer's attention, it printed out some status information, including how many people were already using the computer.