9 ELECTROTECHNICAL AND ELECTRONIC APPARATUS AND INSTRUMENTS, NAMELY, HYBRID INTEGRATED CIRCUITS, CAPACITORS, INDUCTORS, FERRITE CORES, FIXED RESISTORS, PIEZO ACOUSTIC TRANSDUCERS, SOLAR CELLS, MULTI-LAYER CERAMIC CIRCUIT SUBSTRATES, DIODES, FERRITE MAGNETS, CROSS CONDUCTORS, THERMISTORS, SENSORS; BLANK AUDIO CASSETTE TAPES; BLANK VIDEO CASSETTE TAPES; BLANK MAGNETIC TAPES FOR USE IN COMPUTER MEMORIES; PRE-RECORDED AUDIO AND VIDEO CASSETTE TAPES FEATURING MUSIC; COMPUTER OPERATING PROGRAMS; AND COMPUTER UTILITY PROGRAMS