Bar code printers; Bar code scanners; Cash registers; Central processing units (CPU); Computer hardware; Computer memories; Computer monitors; Computer mouse; Computer peripheral devices; Computer programs used for electronic cash register systems; Computers; Desktop computers; Light emitting diode (LED) displays; Liquid crystal displays; Movable sockets; Radio-frequency identification (RFID) readers; Tablet computers; Thermal printers; Touch screens; Memory cards for video game machines