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Thomas Alba edinson and its phonograph
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Lp 78 rpm is invented
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Radio
Radio Transmission developed by G. Marconni. -
Headphones invented by Nathaniel Baldwin
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Traffic lights invented by Garret Morgan
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Loud speakers invented by Edward Kellogg
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Alexander Fleming discovers penecillin
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Ballpoint pen invented by Laszlo Biro
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Atomic bomb
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33 rpm Lp is invented
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45 rpm is created
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Firts T.V. color
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Compact casette is created.
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First hand calculator is invented
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Mobile Phone invented by Dr. Martin Cooper.
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Sony releases portable casette player.
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Cd. is invented
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DVD is invented
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Ipod
