Actor

Base class of People or other active Creatures.

Box

Minimal Container plus Switch --

Container

Object which can contain other objects.

Countable

Countable object (can be plural). --

Drinkable

A class to handle liquids which should be possible to drink.

Edible

Edible

An object that can be eaten like bananas or lime even.

Exit

Exit / Entrance to a Room --

Garment

Clothes or other thing you wear.

Liquid

Liquid objects. --

Monitor

Monitor Tell messages --

NPC

Non-Player Character --

Player

Player's persona in the game --

Room

Basic Room object, a special Container.

Switch

A Thing with simple On-Off behavior --

Thing

Basic type for most PUB nouns. --

Timer

Timer switch --