Source : Free On-Line Dictionary of Computing

LambdaMOO
     
         The most frequently used {server} {software} for
        running a {MOO} and also the nerve-center (of sorts) of the
        MOO community.
     
        {Home (ftp://ftp.lambda.moo.mud.org/pub/MOO/)}.
     
        {Telnet (telnet://lambda.moo.mud.org:8888)}.
     
        (1999-05-25)