Monitoring, radio, television, electrical control testing, signalling, checking (supervision), radio-paging, radio-telephone and radio telecommunications apparatus; telephones; telecommunications apparatus and teaching apparatus therefor; apparatus for the input, output, recording, transmission or reproduction of data, sound or images; cable for signal transmission systems; waveguides; aerials; electronic apparatus and instruments all for input, output, processing, logging, sorting, transmission or reception of data; computers, microprocessors; office machines; encoding and decoding apparatus and instruments, magnetic data carriers; recording discs; encoded programs for computers or data processing apparatus; electrical and electronic coin validation apparatus; and parts and fittings for all the aforesaid goods