Segala macam pesawat audio visual, pesawat penerima radio, televisi, tape recorder, video, VCD, DVD, mesin bicara, gramaphone, rewinder, amplifier, loud speaker, speaker mobil, microphone, megaphone, headphone, wireless, optik, kacamata, lensa-lensa, mikroskop, teropong, teleskop, pesawat komunikasi, telephone, airphone, walky talky, handy talky, pesawat telex, pita-pita magnetik, pita cassette, pita video disk recorder, laser disk, piringan hitam, compact disk (audio, video), antena, booster, radar, parabola, accu, baterai, batu mineral, bel listrik, transformator, travo, ballast, stepup, step down, mesin faksimili, komputer, mesin hitung, kalkulator, kas register, mesin teleks, printer, pesawat-pesawat ukur, speedometer, ampere meter, meteran listrik, volta meter