Backylau is a software package designed to control the places of residence of persons with the ability to add a check status.The system is not demanding on computing power and Internet connection.The application provides continuous access to an interactive map using understandable types of labels: new, tested, not tested for a long time.Convenient user interface, wide functionality, ease of use and ease of training make the PC "Backyllau" a convenient and powerful tool for every user.