In Zork II you can tell the robot to do multiple things. I think you can tell
the demon to do multiple things also, and it knows what you mean, but the demon
will only do one thing for you. Also, in some versions of Zork II you can
give commands to certain theoretically inanimate objects, such as the
aquarium. If you say "aquarium, east. east", the aquarium will usually get
eaten by a grue, although the code isn't quite prepared to deal with it so
although the aquarium disappears from the game, you (the player) are told that
"You have died."
Cheers,
Eric