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26/12/1931 Greatest librarian of all times dies

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The Dewey Decimal Rap

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Melvil Dewey PSA

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Introduction to the Dewey Decimal System

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How to Understand the Dewey Decimal System

American librarian Melvil Dewey invented the decimal classification of knowledge, which is still in use today. It uses the three-digit Arabic numerals for main classes, with fractional decimals allowing expansion for further detail. Dewey was also interested in linguistics and tried to reform English spelling.
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