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Updated:
24 Oct 2017
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Появление магнитной ленты
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ВВВВВВВВВВВ
24 Oct 2017
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начала использоваться тонкая железная проволока
Магнитная лента произвела революцию в вещании и записи.
Магнитные диски
Оптические диски
разработан способ производства бумаги
придумано узелковое письмо «кипу»
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