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In 1820 photography was invented and methods for reproducing photographs
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The telegraph was invented
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The telegraph was still popular until pretty much the end of 1840
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In 1863 thus print became the first of the modern mass media
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In 1877 the phonograph emerged
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In the early 20th century silent movies became very popular
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In commercial radio was used to popularized musical genres, create hit song and more
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In 1927 they linked these radio stations out to other parts of the country
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In 1950 broadcast television emerged
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In 1990 was marked by an explosive growth in online access to internet, emails, news group and more