9 Apparatus for recording, transmission and reproduction of sound, images, or data, namely, computer disk drives and computer tape drives; blank optical, mechanical, or magnetic data carriers for sound, images, or data; computers; computer network hardware, namely, network cards, and cables; accessories for computers and computer networks, namely, printers, plotters, scanners, monitors, and modems; data processing printers for printing vouchers and receipts and for word processing; plotters for data processing; data memory devices, namely, blank magnetic computer tapes and blank magnetic computer disks; computer programs and computer software for use in management of telecommunications and computer systems, and user's manuals sold as a unit therewith