 Part of its real-time nature descended from the need to not have players monopolize the few shared computer terminals.In 1978, Lawrence purchased the Commodore PET 2001 and no longer needed the university's computer, though the microcomputer's lack of memory was his primary design obstacle.He rewrote "DND" as "Telengard" within eight kilobytes of memory and designed the dungeon to be procedurally generated based on the player-character's position so the maps would not have to be stored in memory.