The term M.U.S.H. is an acronym, standing for
"Multi-User Shared Hallucination."
Basically, a MUSH is a program that sits on a host machine (swwfm.net).
Since the machine is permanently connected to the internet, the MUSH program
can be accessed by anyone with the internet address. We'll get to that in a
minute....
Because anyone can connect to the MUSH at the same time, this provides
an easy environment for communication. It is similar to having a "chat
room." However, the MUSH actually has a number of different locations,
each called a "room," and you can communicate with people in the same
room as you using the commands say and pose. You can
also move about the various rooms of the MUSH by using "exits." All of
this lends itself quite nicely to the manufacture of a game similar to
the Infocom games in the 1980s. Therefore, the MUSH is run something
like a text-based adventure, where everything you see is done in text
(there are no pictures, I warn you graphics-lovers now).
Because everyone connected to the same machine ends up online
together, you can interact with/talk to/role-play with anyone else who
is logged in when you are (subject to certain restrictions on how MUSH
communications work). Because you can communicate with multiple people
simultaneously, the MUSH is a "Multi-User" system... hence the first
two letters of the acronym.
Star Wars: Ways of the Force MUSH is an interactive role-playing environment
where you can roleplay with people from all over the world by all connecting
to the same machine. Because the rooms around you and the people "in
a room with you" aren't there physically, the idea that you can talk
to them, shake their hand, etc., is really an illusion, or a
hallucination. Since more than one person is experiencing this
"hallucination" at a time, it is a "Shared Hallucination." Hence the
rest of the acronym.