LambdaMOO

LambdaMOO
Developer(s)Pavel Curtis, project community
EngineMOO
Platform(s)Platform independent
Release1990
Genre(s)Social MUD
Mode(s)Multiplayer

LambdaMOO is an online community of the variety called a MOO. It is the oldest MOO today.

LambdaMOO was founded in 1990 by Pavel Curtis at Xerox PARC. Now hosted in the state of Washington, it is operated and administered entirely on a volunteer basis. Guests are allowed, and membership is free to anyone with an e-mail address.

LambdaMOO gained some notoriety when Julian Dibbell wrote a book called My Tiny Life describing his experiences there. Over its history, LambdaMOO has been highly influential in the examination of virtual-world social issues.