Pesawat penerima radio, televise, tape recorder, video, mesin bicara, gramaphone, rewinder, amplifier, loud speaker, microphone, megaphone, headphone, wireless, VCD, optik, kaca mata, lensa-Iensa, mikroskop, teropong, teleskop, pesawat komunikasi, telephone, walky talky, handy talky, pesawat telex, pita-pita magnetic, pita cassette, pita video disk recorder, laser disk, piringan hitam, compact disk (audio, video) antena, booster, radar, parabola, accu, kotak accu, baterai, pengisi baterai, kotak baterai, bel listrik, kabel telephone, transformator, travo, ballast, step up, step down, mesin facsimile, komputer, mesin hitung, kalkulator, kas register, mesin teleks, printer, pesawat-pesawat ukur, speedometer, ampere meter, meteran listrik, volta meter, modem-modem, monitor (program computer), CPU, stop kotak, sakelar, switch-switch, fiting-fiting, kombinasi fiting, stecter, sonar, seterika listrik, mesin fotocopy, disket, pesawat-pesawat pemadam api, alat solder listrik