Bar code printers; Computer printers for printing documents; Entertainment system comprising a computer, multiple image display screen, multiple input devices and a printer; Photo printers; Print heads for document printers and plotters; Printed circuit boards; Unfilled toner cartridges for printers; Electronic point-of-sale (POS) systems comprised primarily of point-of-sale terminals, bar code readers, touchscreen monitors, keyboards, document printers, scanners, and recorded operating software