Apparatus and instruments for conducting, distributing, modifying, accumulating, tuning, or controlling electrical current, namely, voltmeters; data processing equipment, namely, computers; electronic modules for exchanging data, sound, still or motion pictures and messages, namely, mobile radiotelephones, radio transmitters and receivers, video cameras, and video cassette recorders; apparatus for transmitting, broadcasting, receiving data, sound, still or motion pictures and messages, namely, radio and telephone transmitters, receivers, facsimile machines, fixed and mobile telephones and radio telephones, audio and video receivers, transmitters; telephones and radio telephone answering machines; modems; radio pagers; telephone exchangers, namely, intercom dialers; wireless telephone transmitters and receivers in the form of pylons; satellites and antennas; audio-video computer terminals; computers; local area networking apparatus, namely, computers and fiber optic cables; local area networks comprised of computer terminals, word and data processors and computer software for controlling the network operating system; integrated circuits; microprocessors; computer memories; printed circuit boards; electrical accumulators; magnetic coded memory cards; blank smartcards; electronic memory card readers; and computer telephony software, radio pagers