pesawat penerima radio, tape recorder, video, home theatre (audio visual di rumah), mesin bicara, gramaphone, rewinder, amplifier, loud speaker, microphone, megaphone, headphone, wireless, optik, kaca mata, lensa-lensa, mikroskop, teropong, teleskop, pesawat komunikasi, telephone, walky talky, handy talky, pesawat telex, pita cassette, pita video disk recorder, laser disk, piringan hitam, compact disk (audio, video), antena, booster, radar, parabola, accu, kotak accu, baterai, pengisi baterai, bel listrik, kabel telepon, transformator, travor ballast, step up, step down, mesin faksimile, komputer, mesin hitung, kalkulator, kas register, mesin teleks, printer, pesawat-pesawat ukur, speedometer, ampere meter, meteran listrik, volta meter, modem-modem, monitor (program komputer), CPU, stop kontak, sakelar, switch-switch, fiting-fiting, stecker, sonar, seterika listrik, mesin fotocopy, disket, pesawat-pesawat pemadam api, alat solder listrik, mesin teleks, audio mixer, professional power amplifier, sound processor (compressor limiter, active crossover, professio,nal equalizer, echo, delay), professional speaker system (untuk band, untuk lapangan, untuk studio), TV, VCD, DVD, LCD, DVD player, EVD player, VCD player, CCTV, portable DVD, LCD TV, LCD monitor, plasma TV, CRT monitor, MP3 player, MPEG4 player, portable media player