Example image of eyePlorer eyePlorer map for 'MUD': Multi-user Online game Real-time computing Virtual world Hack and slash Interactive fiction Online chat Role-playing game Non-player character Natural language Character class Fantasy List of species in fantasy fiction Monster Roleplaying Dungeons & Dragons Science fiction Distance education MOO Communication Law Sociology Virtual economy Virtual asset sale MUD client Telnet The Mud Connector Second Life World of Warcraft EverQuest Massively multiplayer online role-playing game RuneScape Brad McQuaid Brian Green (game developer) J. Todd Coleman Mark Jacobs (video game designer) Raph Koster Adventure game Colossal Cave Adventure Digital Equipment Corporation PDP-10 William Crowther Don Woods Dungeon Master ARPANET Massachusetts Institute of Technology Zork Fortran Porting Roy Trubshaw