Pesawat penerima radio, televisi, tape recorder, video, ìmesin bicara, gramaphone, pickup, rewinder, amplifier, loud ìspeaker, speaker mobil, microphone, megaphone, headphone, wire- ìless, vcd, optik kaca mata, lensa-lensa, mikroskop, teropong, ìteleskop, pesawat komunikasi, telephone, airphone, walky talky, ìhandy talky, pesawat telex, pita-pita magnetik, pita cassette, ìpita video disk recorder, laser disk, piringan hitam, compact ìdisk (audio, video), antena, booster, radar, parabola, accu, ìbaterai, batu baterai, bel listrik, kabel telepon,transformator ìtravo, ballast, stepup, stepdown, mesin faksimili, komputer, ìmesin hitung, kalkulator, kas register, mesin teleks, printer, ìpesawat-pesawat ukur, speedometer, ampere meter,meteran listrik ìvolta meter, modem-modem, monitor (program komputer), cpu, stop ìkontak, sakelar, switch-switch, fiting-fiting, kombinasi fiting ìstecker, sonar, seterika listrik, mesin fotocopy, disket