Pesawat penerima radio, televise, tape recorder, video, vcd, dvd, mesin bicara, gramophone, rewinder, amplifier, compact disk, loudspeaker, microphone, megaphone, headphone, handphone, wirelees, optic, kacamata, cassette, lensa-Iensa, mesin-mesin hitung, kas register, pesawat komunikasi, telephone, teropong, teleskop, pita cassette, pita video disk recorder, telex, batu baterai, antenna, booster, radar, parabola, accu, batterai, bel listrik, kabel-kabel, transformator, kalkulator, mesin fax, pesawat-pesawat ukur, speedometer, meteran listrik, modem-modem, monitor, computer, cpu, saklar, stop kontak, swich-swich, fitting-fitting, sonar, setrika listrik, disket-disket, pesawat-pesawat pemadam api, mesin fotocopy, mikroskop, handy talky, printer, travo, ballas, stabilizer, timbangan, sinyal-sinyal, pesawat-pesawat penggerak otomatis, sound processor, professional aqualizer