Multi User Dungeon MUD muhd n. [acronym, Multi-User Dungeon; alt. Multi-User Dimension]
A class of virtual reality experiments accessible via the Internet. These are real-time chat forums with structure; they have multiple ‘locations’ like an adventure game, and may include combat, traps, puzzles, magic, a simple economic system, and the capability for characters to build more structure onto the database that represents the existing world.
WikiPedia:MUD, WikiPedia:MOO
The legendary LambdaMOO: http://www.lambdamoo.info
The Land of Karchan
ScriptersMOO E_WEB Interface
Choose Your Own Adventure Books
Computerized Examples
The Body by Shelley Jackson
Ceremony Of Innocence
Al-Jahiz
Galetea
Pong, The Text Based Adventure
Archive sites
Brass Lantern’s Introduction to Interactive Fiction
The First Games Auriea Ever Played All the Way Through.
Hamlet, the text adventure
Zork 2
Altar Ego: http://www.theblackforge.net/
Classics
Castle Marrach