How it works Dewey decimal system

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Karan Barua 11 – D                                Title:  Dewey Decimal classification system

ICT GNVQ 11 – 1

Reg no. W345009

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How it works

The DDC attempts to organize all knowledge into ten main classes that, excluding the first class (000 Computers, information and general reference), proceed from the divine (philosophy & religion) to the mundane (history & geography). DDC's cleverness is in choosing decimals for its categories; this allows it to be both purely numerical and infinitely hierarchical. It also is a faceted classification, combining elements from different parts of the structure to construct a number representing the subject content (often combining two subject elements with linking numbers and geographical and temporal elements) and form of an item rather than drawing upon a list containing each class and its meaning.

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Except for general works and fiction, works are classified principally by subject, with extensions for subject relationships, place, time or type of material, producing classification numbers of not less than three digits but otherwise of indeterminate length with a decimal point before the fourth digit, where present (e.g. 330 for economics + 94 for Europe = 330.94 European economy; 973 for United States + 005 form division for periodicals = 973.005, periodicals concerning the United States generally); class marks are to be read as numbers, in the order: 050, 220, 330.973, 331 etc. Any letter should be read as ...

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