Annotated Source: Planetfall

This property does double duty. For rooms, it specifies extra travel time for particular directions. (That is, unusually long exit paths.)

For the dispenser buttons on the CHEMICAL-DISPENSER, C-MOVE specifies the chemical color.

(In fact Planetfall only uses 26 of the 31 properties, so there’s no need to double up like this.)

Set for living beings (or friendly robots).

Set for glowing objects and permanently-illuminated rooms.

Set for all rooms. This flag is not checked for rooms, but it has a secondary use: Floyd has RLANDBIT when active.

Not applied to real objects. RMUNGBIT is a hack used in grammar lines; it means the object is optional (but the preposition before it is required). This allows the parser to accept commands like LOOK AROUND.