A parking system management aim at controlling the car flow to get into the parking and get out of the parking. It has limited number of places. There are a number of entry and exit gates. When the parking is full, the system does not allow a car to get in aymore until at least one place become available. The parking is controlled in real time, in each gate there is a RTU (Remote Terminal Unit), and the RTU communicat with a controller. A RTU display the number of availbale places on an external display. A PC is interfaced with the system and can monitor it or send commands.