Radio, radio cassette, amplifier, power ampli, loudspeaker, speaker box, VCD, pesawat televisi, tape recorder, video, mesin bicara, gramaphone, pickup, rewinder, amplifier, microphone, megaphone, headphone, wireless, VCD, optik, kaca mata, lensa-lensa, mikroskop, pesawat komunikasi, telephone, airphone, walky talky, handy talky, pesawat telex pita cassette, pita video disk recorder, laser disk, piringan hitam, compact disk (audio, video), antena, booster, radar, parabola, accu, baterai, batu baterai, bel listrik, kabel telepon, transformator, travo, ballast, step up, step down, mesin faksimili, komputer, mesin hitung, kalkulator, kas register, mesin teleks, printer, pesawat-pesawat ukur, spedometer, 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 listrik, alat fotografi, kamera, lensa kotak, antena TV/radio