Pesawat penerima radio, televisi, tape recorder, video, ìmesin bicara, gramaphone, pickup, rewinder, amplifier, loud ìspeaker, microphone, megaphone, headphone, wireless, VCD, ìoptik, kaca mata, lensa-lensa, mikroskop, teropong, teleskop, ìpesawat komunikasi, telephone, airphone, walky talky, handy ìtalky, pesawat telex, pita-pita magnetik, pita cassette, pita ìvideo disk recorder, laser disk, piringan hitam, compact disk ì(audio, video), antena,booster, radar, parabola, accu, baterai, ìbatu baterai, bel listrik, kabel telepon, transformator, travo, ìballast, stepup, stepdown, mesin faksimili, komputer, mesin ìhitung,kalkulator,kas register, mesin teleks, printer, pesawat- ìpesawat ukur, speedometer, ampere meter, meteran listrik, volta ìmeter,modem-modem,monitor (program komputer), cpu, stop kontak, ìsakelar, switch-switch, fiting-fiting, kombinasi fiting, stec- ìker, sonar, vacuum cleaner (alat pembersih debu), seterika ìlistrik, mesin fotocopy, disket, pesawat-pesawat pemadam api, ìalat solder listrik