Thing
From Tapestries MUCK
Things are generic objects that can only contain other things. They are mostly a holdover to puzzle-oriented TinyMUDs.
Things show up in the description of rooms and players that they are contained in. They can also have very large names. Thus they are commonly used to make signs left in rooms or buttons worn by players.
Examples
To create a sign:
@create SIGN: Do not litter! drop sign
To create a button:
@create BUTTON: I am fluffy!