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SHOUT sends a message to all awake players in the world. To curb excessive
shouting, SHOUT imposes a three-second delay on the shouter.
CHAT and MUSIC also send messages to all interested players. '.' is a synonym
YELL sends a message to all awake players within your area.
You can use the TOGGLE command to disable any of these channels.
All of these commands send messages to other players. GTELL sends a message to
all of the characters in your group, wherever they are, even if they are
sleeping or stunned or dying. ';' is a synonym for GTELL.
SAY sends a message to all awake players in your room. The single quote '''
is a synonym for SAY.
TELL sends a message to one awake player anywhere in the world.
REPLY sends a message to the last player who sent you a TELL. REPLY will work
even if you can't see the player, and without revealing their identity. This
is handy for talking to invisible or switched immortal players.