Electronic modules for exchanging data, sounds, still or motion pictures, and messages, namely, mobile radiotelephones; apparatus for transmitting, broadcasting and receiving data, sounds, still or motion pictures and messages, namely, radio and telephone transmitters, facsimile machines, and telephone, audio, and video receivers; fixed and mobile telephone and radiotelephone transmitters, receivers, and installations, namely, computers; telephone and radiotelephone answering machines; modems; electrical masts, pylons, and towers for wireless telephones; radio pagers; telephone exchangers in the nature of intercoms and dialers; paging and radiotelephone computer terminals; satellites and antennas for broadcasting, transmitting and receiving data, sounds, still or motion pictures and messages; audio-visual and multimedia computer terminals, local area networks comprised of computer terminals, word and data processors, and computer software for controlling the network operating system; integrated circuits; microprocessors; electrical accumulators, and printed circuit and computer interface boards