What Is MUSH?
There are those that say MUSH stands for Multi-User-Shared-Hallucination, but in truth, that acronym (and others like it that use Habitat instead of Hallucination) are nicknames that came afterward. Regardless of when it happened, the moniker is a good one. MUSHes are text-based environments that are ideal for setting up written roleplaying games. In the early days of the internet, before massive multiplayer online games like World of Warcraft came out---indeed, before the world wide web existed---MUSHes and MUDs were a popular way for folks to game. They are similar to chat programs like IRC, AOL, and any of the more recent chat systems like Google Talk, however MUSH offers a far more detailed environment. It allows the user to build an entire world around them. Players can dig 'rooms' that can be described as anything they can imagine--from a common living room in a brownstone apartment, to a cloud city in a far off galaxy. The object-oriented code allows users a multidue of ways to create unique environments. For more information on the origin and nature of MUSH, as well as sites for good MUSH code, see the links below.
MUSH at Wikipedia
MUSHcode.com
MUSHcode.net
Gwen's Mushcode
Amberyl's MUSH Manual
Myrddin's MUSH Code
Raevnos' MUSH Code Page
Talvo