After entering the CNP, press the "READ" button, it automatically checks after the last digit if the CNP is real and the data of the person whose CNP is read will appear: year, month, day of birth; The county where he was born and the period in which he was born. These data can also be read from the tables, but it is much faster with the help of the application. Press the "DELETE" button, delete the current data, close the application, all data, numbers disappear by CNP, nothing is registered, no information is stored.