Print heads for document printers and plotters; Print heads for plotters; Printheads for plotters; Printheads for document printers; Unfilled ink cartridges for photocopy machines or computer printers; Document printers; Document printers for use with computers; Ink cartridges, unfilled, for printers and photocopiers; Computer chips; Electric cables, wires, conductors and connection fittings therefor; Computer memory hardware; Micro-computer