FIELD: physics, computer engineering.
SUBSTANCE: invention relates to a data processing device, a POS system and a method of controlling a POS system. The method includes transmitting identification information with which a terminal device is identified from a data processing device to the terminal device, receiving the transmitted identification information in the terminal device and displaying said information on the terminal device, actuating a device for reading the displayed identification information, obtaining read data in the data processing device and determining communication of the terminal device and the device by comparing the identification information read by the device and identification information transmitted to the terminal device.
EFFECT: simple configuration of reading devices of a POS system and determining communication of reading and terminal devices.
17 cl, 10 dwg
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