The document describes a parking ticket simulator program that requires designing four classes: ParkedCar to store a car's attributes, ParkingMeter to track purchased time, PoliceOfficer to examine cars and meters and issue tickets, and ParkingTicket to contain fine details. The program demonstrates how the classes collaborate - a PoliceOfficer examines a ParkedCar and ParkingMeter, and if time is expired, generates a ParkingTicket.