Bar code printers; Bar code scanners; Barcode scanner; Barcode scanners; Computer printers for printing documents; Document printers; Document printers for computers; Document printers for use with computers; Drum units for printers, facsimile machines, scanners, copying machines and multifunction electronic devices for use in copying, printing, scanning, video capture and/or transmitting documents and images; Electronic point-of-sale (POS) systems comprised primarily of point-of-sale termina...