9 APPARATUS AND INSTRUMENTS FOR OPTICAL TRANSMISSION - NAMELY, LASERS AND LIGHT EMITTING DIODES, PHOTO-DETECTORS, OPTICAL TRANSMITTERS, OPTICAL RECEIVERS, OPTICAL GENERATORS, OPTICAL SWITCHES, OPTICAL AMPLIFIERS, OPTICAL MODULATORS, OPTICAL COUPLERS, OPTICAL CABLES, OPTICAL WAVEGUIDES; CONTROL CIRCUITRY; [ COMPUTERS; ] MICROPROCESSORS; [ OPTICAL DATA CARRIER IN THE FORM OF DISCS, TAPES AND CARDS; ENCODED COMPUTER PROGRAMS FOR OPTICAL DATA TRANSMISSION; AND CABLES FOR ELECTRICAL OR OPTICAL SIGNAL TRANSMISSION ]