DND is a role-playing video game developed by Purdue University student Daniel Lawrence in 1977 for the Digital Equipment Corporation (DEC) PDP-10 mainframe computer. The name DND is derived from the abbreviation "D&D" from the original tabletop role-playing game Dungeons & Dragons. It was later ported to several other computer systems and languages. After Lawrence re-used code from the game in the 1982 role-playing game Telengard, DEC ordered DND be removed from their computers to avoid litigation by Telengard's publisher. DND was one of the earliest role-playing video games, as part of a set of games developed in the 1970s based on the 1974 Dungeons & Dragons.