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Dewey Decimal Classification: Dewey Decimal Classification System
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The Dewey Decimal Classification System is the most widely used method for classifying books in the library. This system is a general knowledge organization tool that is continuously revised to keep pace with knowledge. It is named after Melvil Dewey, an American Librarian who developed it in 1876. This system is a numerical scheme for the arrangement of subjects of nonfiction books, and it classifies books by dividing them into 10 main subject groups that are called categories. Each category is represented by figures beginning with 000 and going on to 999. In other words, it is a system of numbers used to mark and arrange mostly non-fiction books.
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The Dewey Decimal Classification System (DDC) is a system that classifies or categorizes nonfiction books into ten main divisions. These classes are further divided into ten subdivisions and the use of decimals allows for additional categories. A book is assigned a Dewey number based on its subject matter. In most libraries the Dewey number and the first one, two or three letters of the author's last name become the book's call number, or its address on the library shelves. Nonfiction books are arranged numerically on the shelves according to DDC, ranging from 001 to 999.
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The Dewey Decimal Classification (DDC) system, devised by Melvil Dewey in the 1870s and first published in 1876, was published in its 22nd edition (DDC 22) in four volumes in 2003 (... available in a Web version). The DDC is the world’s most widely used library classification system. The system is published in a full version as well as an abridged version. Dewey abridged 14th edition was released in 2004 and is designed for small public libraries and individual school libraries. DDC is probably the system which has meant most for the institutionalization and ideology of LIS.
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Used by 95 per cent of the public libraries in the US, the Dewey Decimal Classification system is familiar to most Americans. According to a recent Gallup poll conducted for the American Library Association http://www.ala.org two out of three Americans own and use a library card. Over 60 per cent of Americans have visited their public library at least once in the last year. A recent Suite101.com survey of its members found similar results. Over 70 per cent of those surveyed said they have visited their local library in the past six months.
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The Dewey Decimal Classification System is used in most Public School libraries. It is essential for students to understand why books are numbered and how to find the numbers on the shelves, so they can use the library effectively and in a friendly manner. Dewey is ... used for other purposes, e.g., as a browsing mechanism for resources on the Web. One of Dewey's great strengths is that the system is developed and maintained in a national bibliographic agency, the Library of Congress.
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The Dewey Decimal Classification System is used by libraries to organize their collections by subject. Main subjects are given a three-digit number: 200, 300, etc., and then further broken down into sub-categories: 220, 230, 240, etc. Subdivisions of the sub-categories are shown by numbers after a decimal point: 220.550, 350.90, etc.
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Dewey Decimal Classification System