Audio, audio system, Hi-fi system, walkman, VCD, VCD player, DVD player, video system, video campact disc, laser disc, laser disc player, loudspeaker active, TV monitor, monitor computer, pesawat computer, piringan hitam, telepone fax, pesawat faximili, central telephone system, telephone switching system, AC-DC, adaptor, satelite docoder, digital analog decoder, antena parabola, baterai, accu, bel listrik, kabel listrik, setrika listrik, penangkal petir, mesin teleks, receiver parabola, stabilizer tegangan listrik, diskette computer, printer computer, pesawat-pesawat dan perkakas ilmu pengetahuan, geodesi, pesawat-pesawat penerima radio, alat-alat potret, cinematografi, alat-alat optik, alat - alat timbang dan ukur, pesawat sinyal, mesin-mesin bicara, kas register, mesin hitung, pesawat pemadam api, rambu-rambu lalu lintas, topi helm (helmet), sempoa, batu battery,accumulator, kaca mata, bingkai kaca mata, transformator, pita cassette rekaman video dan rekaman suara, kebel antena, fitting - fitting listrik, sakelar - sakelar listrik, stecker listrik, sabuk (ikat pinggang), pengaman, stabilizer tegangan listrik,alat penerus daya sewaktu listrik mati (uninterruptible power), step up/step down, pesawat televisi, radio, video, pelayaran