Adornment - Items that can be added onto another item. An example of these are gems.
Effect - Commonly, but mistakenly, known as Affects in other codebases. This is the main mechanism to transfer the effects of an action onto a MUD object. These objects are anything that inherits from the Thing base class.
Item - This are MUD objects that the players can interact with.
Item Behavior - This is used to attach behavior to items.
Rule Set - A grouping of rules that are specific to a gaming system, i.e. Dungeons and Dragons, RuneQuest, ShadowRun, GURPS, Rifts, etc.
Thing - This is the top level object in WheelMUD. All MUD objects descend from this.
Visuals - These are non-interactive objects in a room description. These correspond to nouns in the room description text.
