Downloadable computer software and computer software for use in analyzing, identifying and optimizing the characteristics of drives and optical media; downloadable computer software and computer software for recording, writing and copying sound, images, data and numeric characters on DVD+R, DVD-R, DVD-ROM, DVD-RAM, DVD-RW, DVD+RW, CD-ROM, CD-R, CD-RW, ROM cartridges, optical discs, magnetic discs, magnetic tapes, IC (integrated circuits) cards, video discs and video tapes; blank DVD+R, DVD-R, DVD-ROM, DVD-RAM, DVD-RW, DVD+RW, CD-ROM, CD-R, CD-RW, ROM cartridges, optical discs, magnetic discs, magnetic tapes, IC (integrated circuits) cards, video discs and video tapes; CD players and recorders, DVD players and recorders, video disc players and recorders, magnetic tape players and recorders, magnetic disc players and recorders, and IC (integrated circuits) recorders; electronic error checkers for detecting errors on optical media, such as DVD+R, DVD-R, DVD-ROM, DVD-RAM, DVD-RW, DVD+RW, CD-ROM, CD-R, CD-RW, ROM cartridges, optical discs, magnetic discs, magnetic tapes, IC(integrated circuit) cards, video discs and video tapes; apparatus for recording, transmission or reproduction of sounds and images; computers; computer hardware and peripherals; electric and electronic parts and components, namely integrated circuits, large scale integrated circuits, microprocessors, capacitors, ceramic capacitors, resistors, fixed resistors, electric coils, dielectric filters, dielectric resonators, LC (inductor capacity circuit) filters; magnets, NTC (negative temperature coefficient) thermistors, hybrid ICS (integrated circuit systems), DC to DC converters, inverters, switching power supplies, ferrite cores and multimedia sequencers; EMI (electro magnetic interference) suppression filters, namely, ferrite beads, choke coils, spark gaps and varistors; acoustic transducers, namely, piezoelectric receivers and piezoelectric sounders; radio frequency components comprising power amplifiers, RF modules and antenna units; medical sensor components, namely electrolyte analyzers; optical communication modules and parts for optical communication modules including optical splitters, multiplexers, plastic optical multiplexers, optical filters, optical mirrors, optical scanners, fiber optics, fiber optic cables and fiber optic light and image conduits; radio and television transmitters and receivers; remote control and telemetering apparatus, namely remote telemetry transmitters, motion and position sensors and remote telemetry computers; prerecorded magnetic discs, magnetic tapes and optical discs featuring computer software for transmittal and processing of text, images, sound, data and numeric characters; prerecorded magnetic discs, magnetic tapes and optical discs featuring text, images, sound, data and numeric characters; encoded IC (integrated circuits) cards featuring computer software for transmittal and processing of text, images, sound, data and numeric characters; encoded IC (integrated circuits) cards featuring text, images, sound, data and numeric characters; multimedia software recorded on DVD+R, DVD-R, DVD-ROM, DVD-RAM, DVD-RW, DVD+RW, CD-ROM, CD-R, CD-RW, ROM cartridges featuring text, images, sound, data and numeric characters; electronic publications, namely books, magazines, manuals, brochures and catalogues featuring computer software for transmittal and processing of text, images, sound, data and numeric characters recorded on computer media; electronic publications, namely books, magazines, manuals, brochures and catalogues featuring text, images, sound, data and numeric characters recorded on computer media; downloadable electronic publications in the nature of books, magazines, manuals, advertisements, brochures and catalogues in the field of global computer networks, computer hardware and software, business, advertising, education, sports, games and music