Dictionary.net

The sort said to be possessed by persons for whom thetransition from punched card to paper tape was traumatic(nobody has dared tell them about disks yet). It is said thatthese people, including (according to an old joke) the founderof IBM, will be buried "face down, 9-edge first" (the 9-edgebeing the bottom of the card). This directive is inscribed onIBM's 1402 and 1622 card readers and is referenced in a famousbit of doggerel called "The Last Bug", the climactic lines ofwhich are as follows: He died at the console Of hunger and thirst. Next day he was buried, Face down, 9-edge first.The eighty-column mind is thought by most hackers todominate IBM's customer base and its thinking.See fear and loathing, card walloper.