coampact disk(audio,vidio), mesin faksimail: komputer, mesin hitung, kalku1ater, kas register, mesin teleks, printer, printer, transforamater, ballast, stepdown, stepup, spedometer, CPU, seterika listrik, Pesawat peneriama'radio, televisi, tape recorder, video, mesin bicara, rewinder, amplifier, loud'speaker, microphone, megaphonee headpone, wireless, 'VCD, tele:pon, airphone, walky talky, handytalky, pesawat telex, :pesawat komunikasi, laser disk, kabel telepon,'kabel listrik