Implementer was originally the self-given name of the creators of the Infocom text adventure series Zork. Implementor, often shortened to Imp, became the title given to game designers and programmers at Infocom. Implementers were inserted as minor characters in several Infocom games. The game Beyond Zork also includes a group of characters called Implementors, minor deities who are integral to the plot. The term carried over into MUDs, particularly DikuMUDs, where it usually refers to a game's owner or owners, similarly to the term "God".