Televisi, pesawat penerima radio, tape recorder, video, video CD, digital CD, laser disc, amplifier, loudspeaker, headphone, microphone, megaphone, rewinder, optik, lensa-lensa , kacamata dan bagian-bagiannya, telephone, handphone, airphone, pesawat telex, pita-pita kaset, pita video, piringan CD, antenna, booster, radar, parabola, accu, baterai, batu baterai, transformotor, travo, ballast, step up & step down, komputer, mesin bitung, kalkulator, kas register, pesawat-pesawat ukur, amperemeter, speedmeter, meteran listrik, voltameter, stop kontak, sakelar, switch-switch, fitting-fitting, kombinasi fitting, stecker