All sorts of commands are available to players. Common ones are listed by typing 'help'; you can get a listing of all commands by typing 'help index' and learn about each one with 'help <command>' as needed. Since exits can be given the same name as commands, this can be confusing to beginners. All @ commands are caught before exits are checked, however, as well as WHO, QUIT, OUTPUTPREFIX, OUTPUTSUFFIX, and home. Also, some areas may have more commands available in them. See BOGUS.