Pesawat penerima radio, televisi,tape recorder, video,mesin ìbicara, gramaphone, pickup, rewinder, amplifier, loud speaker, ìmicrophone, megaphone, headphone, wireless, vcd, optik, kaca ìmata, lensa-lensa, mikroskop, teropong, teleskop, pesawat komu- ìnikasi, telephone, airphone, walky talky, handy talky, pesawat ìtelex, pita-pita magnetik, pita cassette, pita video disk ìrecorder, laser disk, piringan - piringan hitam, compact disk ì(audio, video), antena, booster, radar, parabola, kawat las ìlistrik, accu,baterai,batu baterai, bel listrik, kabel telepon, ìtransformator, travo, ballast,stepup, stepdown,mesin faksimili, ìkomputer, mesin hitung, kalkulator, kas register, mesin teleks, ìprinter,pesawat-pesawat ukur,speedometer, ampere meter, meteran ìlistrik, volta meter, modem-modem, monitor (program komputer), ìcpu, stop kontak, sakelar, switch-switch, fiting-fiting, kombi- ìnasi fiting, stecker, sonar, seterika listrik, mesin fotocopy, ìdisket, pesawat-pesawat pemadam api, alat solder listrik