de-wey decimal classification

Dewey decimal classification

noun Trademark.
a system of classifying books and other works into ten main classes of knowledge with further subdivision in these classes by use of the numbers of a decimal system: devised by Melvil Dewey, published in 1876, and used in many libraries in the U.S. and elsewhere.

Origin:
1880–85

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WordNet
dewey decimal classification

noun
a system used by libraries to classify nonfictional publications into subject categories; the subject is indicated by a three-digit numeral and further specification is given by numerals following a decimal point; publications are shelved by number 
WordNet® 3.0, © 2006 by Princeton University.
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