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The walkman come out in 1979 under Sony company. This was the first portable music device and sol over 385 millions units.
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The CD allowed for people to listen to whatever song/artist they wanted anytime. It was created by James Russell. 25 years after release there have been nearly 200 billion CDs sold worldwide.
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This was the first mobile phone. It was created by Martin Cooper. In the first year in the market there was only 1,200 units sold.
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Bill Gates is the founder of the most successful computer company ever. Over the years there have been over 1 billion total copies of windows sold.
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The Gameboy was the first successful portable gaming device. The creator of the Gameboy was Gunpei Yokoi. The product has since sold over 200 million units.
