Pesawat penerima radio, televisi, tape recorder, video, ìmesin bicara, gramaphone, pickup, rewinder, amplifier, loud ìspeaker, microphone, megaphone, headphone, wireless, vcd,optik, ìkaca mata, lensa-lensa, mikroskop, teropong, teleskop, pesawat ìkomunikasi, telephone, airphone, walky talky, handy talky, ìpesawat telex, pita-pita magnetik, pita cassette, pita video ìdisk recorder, laser disk, piringan hitam, compact disk (audio ìvideo), antena, booster, radar, parabola, accu, baterai, batu ìbaterai, bel listrik, kabel telepon, transformator, travo, ìballast, stepup, step down, mesin faksimili, komputer,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, ìpesawat-pesawat pemadam api, alat solder listrik