The document defines classes for the core components of a Monopoly game simulation including:
1) An Actor class that represents any actor in the game with name and balance attributes.
2) A Bank class that extends Actor and represents the game bank with house and hotel attributes.
3) A Player class that extends Actor and implements an interface to represent individual players with field and balance attributes.
4) A Field class that represents individual game fields with name, index, and bank attributes.
5) A MonopolyGame class that runs the main game loop, initializing players and fields and managing turns.