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Building the Unstructured Data Warehouse: Architecture, Analysis, and Design by Krish Krishnan, W. H. Inmon

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As the cartoon from the prior page illustrates, in the beginning there was paper tape and punched cards. There is no question that data stored on paper tape and punched cards was an improvement over data that was stored on paper and pencil and hands and fingers. Soon, paper tape and punched cards gave way to magnetic tape. With magnetic tape, much more data could be stored, and a magnetic tape did not spill its contents in disarray over the floor when dropped, as did punched cards. But magnetic tape had its limitations, too, and soon there was disk storage. With disk storage, data could be accessed directly and quickly. In short order, disk storage replaced most of the uses of magnetic tape.

The applications that were ...

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