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Melvil Dewey, American librarian and educator, created the Dewey Decimal Classification (born 1851)
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Melvil Dewey
Inventor of the Dewey Decimal system
Melville Louis Kossuth "Melvil" Dewey was an American librarian and educator who invented the Dewey Decimal system of library classification. He was a founder of the Lake Placid Club, a chief librarian at Columbia College, founder of what would later become the Columbia…Source: Wikipedia (CC BY-SA)
Dewey Decimal Classification
Library classification system
The Dewey Decimal Classification (DDC) colloquially known as the Dewey Decimal System, is a proprietary library classification system which allows new books to be added to a library in their appropriate location based on subject. It was first published in the United States by…Source: Wikipedia (CC BY-SA)