A MOO (MUD, object oriented)'s a text-based online virtual reality system to which multiple users (players) are connected at the same time. The term MOO's used in two distinct, but related, senses. One's to refer to those programs descended from the original MOO server, and the other's to refer to any MUD that uses object oriented techniques to organize its database of objects, particularly if it does so in a similar fashion to the original MOO or its derivatives. Most of this article refers to… (More on Moo)