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...