1.telegraf:samuel finley breese morse-1837
2.telepon;alexander grahambell-1876
3.radio;joseph henry dan michael faraday-1910
4.sistem radio FM:edwin howard armstrong-1933
5.audion;lee de forest-1906
6.televisi:john lodie baird
7.kalkulator otomatis:blaise pascal-1642
8.di fferential analyzer:vannevar bush-1890-1974
9.IC(integrated circuit):jack kilby-1958
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