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the first modern credit card was in 1950
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in 1951 the colored tv was introduced.
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in 1952 was the first seat belt in the car.
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in 1953 DNA was discoverd
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in 1950 the first McDonalds was built.
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in 1955 rosa parkas refused to give up seat of public bus.
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in 1956 the first bottle of liquid paper was invented.
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in 1957 the hula hoop was a popular.
