Pesawat penerima radio, televisi, tape recorder, video, vcd,dvd, mesin bicara, gramaphone, pickup, rewinder, amplifier, loudspeaker, speaker mobil, microphone, megaphone, headphone, wireless, optik, kaca mata, lensa-Iensa, 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, batubaterai, bel listrik, kabel telepon, transformator, travo, ballast, stepup, stepdown, mesin faksimili, komputer, mesin hitung, 0 kalkulator, kas register, mesin teleks, printer, pesawat-pesawat ukur, speedometer, ampere meter, meteran listrik, volta meter, modem-modem, monitor (program komputer), cpu, stop kontak, sakelar, switch-switch, fiting-fiting, kombinasi fiting, stecker, sonar, seterika listrik, mesin fotocopy, disket, pesawat-pesawat pemadam api, alat solder listriko