Abstract: There is disclosed a system has a POS terminal comprising a display output interface and an identification input interface, the POS terminal being programmed: to receive identification data via the identification input interface, the identification data identifying a selected product for processing by the POS terminal, to process the identification data to generate alphanumeric text data encoding a description of the selected product, and to output the alphanumeric text data via the display output interface; a display unit; and a controller, programmed: to receive the alphanumeric text data from the POS terminal display output interface, to process the alphanumeric text data to generate further identification data identifying the selected product, to process the further identification data to select graphical data appropriate for the selected product, and to output the graphical data to the display unit. A controller, method, computer readable medium and computer are also disclosed.