Magnetic discs, floppy discs, compact discs, computer keyboards, printers, magnetic compact discs, micro-computers, mainframe computers; mouse controllers for computers, data memories, bar code scanners, ROMs (read-only memories), laser printers, computer operated plotters, input indicators, cassette memories for computers, printer buffers, microprocessors; PC mainframes, RAMs (random access memories), digitizers, computer input/ output recorders, programmed computer tapes, touch induction input devices; programmable data processors, program cassettes for video games, magnetic data containing identity cards, disk drivers, data readers, circuit boards, interface cards, micro circuits, integrated circuits, electronic circuits, semi-conductor wafers, semi-conductor elements, control cards for laser printers, and control cards for plotters