9 ELECTRICAL, ELECTRONIC, ELECTRO-OPTICAL AND OPTICAL INSTALLATIONS, APPARATUS AND INSTRUMENTS; MONITORING (OTHER THAN FOR MEDICAL OR SURGICAL PURPOSES), RADIO, TELEVISION, ELECTRICAL CONTROL TESTING (OTHER THAN FOR IN VIVO TESTING), SIGNALLING, CHECKING (SUPERVISION), RADIOPAGING, RADIO-TELEPHONE AND RADIO TELECOMMUNICATION TELEPHONES INCLUDING PAY PHONES TELECOMMUNICATIONS AND TEACHING APPARATUS AND INSTUMENTS; APPARATUS FOR INPUT, OUTPUT, RECORDING, TRANSMISSION OR REPRODUCTION OF SOUND OR IMAGES; SUBMARINE CABLES, CABLES FOR SIGNAL TRANSMISSION SYSTEMS, WAVEGUIDES, AERIALS; ELECTRONIC APPARATUS AND INSTRUMENTS, ALL FOR INPUT, OUTPUT, PROCESSING LOGGING, STORING, TRANSMISSION OR RECEPTION OF DATA; COMPUTERS; MICROPROCESSORS; OFFICE MACHINERY; ENCODING AND DECODING APPARATUS AND INSTRUMENTS; MAGNETIC DATA CARRIERS, RECORDING DISCS, ENCODED PROGRAMS FOR COMPUTERS AND FOR DATA PROCESSING APPARATUS ELECTRICAL AND ELECTRONIC COIN VALIDATION APPARATUS PARTS AND FITTINGS; COMMUNICATIONS AND TELECOMMUNICATIONS INSTALLATION APPARATUS AND INSTRUMENTS; MODEMS