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First magnetic audiotapes
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Philips invents the audio cassette
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First portable cassette player (Philips)
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Tape decks in car audio
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Prerecorded music cassettes (Philips)
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Sony Walkman
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80's and 90's: cassette sales overtake vinyl sales
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Mid-90's: CD starts overtaking cassette
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Main music labels stop using music cassettes
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OED announces removal of entry "cassette tape"