diskman, LCD TV, handphone, kamera, optic, kacamata, lensa-lensa, mikroskop,teropong, teleskop,, fiting, kombinasi fiting, stectersonar, mesin fotocopy, pesawat-pesawat pemadam api, komputer, parabola, accu, kotak acuu, baterai, pengisi baterai, batu baterai, kotak baterai, bel listrik, kabel telepon,, pesawat komunikasi, telephone, walky talky, handy talky, pesawat telex, pita-pita magnetic,pita cassette,, Pesawat penerima radio, televisi, tape recorder, video, mesin bicara, gramophone, rewinder, amplifier, loud speaker, microphone, megaphone, headphone, VCD, DVD player, MP3, MP4,, pita video disk recorder, laser disk, piringan hitam, compact disk (audio,video), antenna, booster, radar,, transformator, travo, ballast, step up, step down, mesin facsimile, mesin teleks, printer, pesawat-pesawat, ukur, speedometer, amper meter, meteran lsitrik, volta meter, stop kontak, sakelar, switch-switch, fiting-