| About.com: Multi-User Dungeons: Article featuring background information and resources. |
| An Atlas of Cyberspaces - MUDs and Virtual Worlds: An atlas of maps and graphic representations of the geographies of the new electronic territories of the Internet, WWW and other emerging Cyberspaces. |
| Basic Information about MUDs and MUDding: FAQ about MUDs and MUDding. |
| Code begets community: Information about Daniel Pargman's Ph.D. thesis on the social and technical aspects of managing a virtual community, a study of a Swedish MUD. Sample chapters in PDF format. |
| DikuMUD Family Tree: Listing of MUD codebases by heirachy for Diku and all code bases. |
| Games/mud FAQ Index: Listing of online FAQ for MUD's. |
| Journal of Virtual Environments: Academic journal devoted to MUDs and their uses. Formerly known as the Journal of MUD Research. |
| MUSE Ltd.: Purveyors of fine, online games since 1985; principal products are MUD2 and the MUDDLE programming language and development system, both available for commercial licensing. |
| Open Site: An article with an explanation of what MUDs are, an overview of their history, and a list of variants. |
| Richard A. Bartle: Players Who Suit MUDs: Discusses whether MUDs are games, pass times, sports or entertainments and suggests four kinds of player: achiever, explorer, socializer or killer. |
| Vae Victus: Contains news, logs, history, and a message board. |
Classical
