Fiction books are usually placed outside the Dewey system in public libraries (which use Dewey most often) but can be placed in 813 (American Fiction) and/or 823 (British fiction). Fiction of other languages follows the same protocol-- Spanish fiction in 863, for example.
Books on philosophy are typically assigned the numbers 100-199 in the Dewey Decimal Classification system.
Fiction books in libraries are typically assigned Dewey Decimal Classification numbers in the 800s, specifically in the 813-819 range for American literature and its subdivisions. However, many libraries use different classification systems for fiction, such as the Library of Congress Classification system, which assigns fiction books a combination of letters and numbers based on author names and subjects. In general, while Dewey Decimal numbers can be used for fiction books, they are not a strict requirement and may vary depending on the library's cataloging practices.
All real numbers can be represented in the decimal system. Complex numbers can be represented by a pair of numbers in the decimal system.
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http://en.wikipedia.org/wiki/List_of_Dewey_Decimal_classes#300_.E2.80.93_Social_sciencesor 301
The library uses the Dewey Decimal Classification system to allocate numbers to books.
The two general kinds of book classifications in a library are the Dewey Decimal Classification system and the Library of Congress Classification system. The Dewey Decimal system categorizes books by subject based on a numerical system, while the Library of Congress system organizes books by both subject and author through a combination of letters and numbers.
The Dewey Decimal System places topics related to religion in the 200s section. This includes books on Christianity, Islam, Judaism, and other world religions. Each religion is assigned a specific range of numbers within the 200s to organize related topics.
Nonfiction books are assigned Dewey Decimal numbers based on their subject matter. This classification system categorizes books into 10 main classes, with each class further divided into subcategories. Librarians use the Dewey Decimal Classification system to assign a unique number to each nonfiction book to help organize them on library shelves.
The system used most extensively is the Dewey Decimal Classification or DDC, also called the Dewey Decimal System. It was developed, in its original form by Melvil Dewey in the mid 1870's Scitech
Books in the library are generally classified using the Dewey Decimal Classification system or the Library of Congress Classification system. The Dewey Decimal Classification system categorizes books based on subjects into 10 main classes. The Library of Congress Classification system organizes books by more specific topics using a combination of letters and numbers.
The decimal number system.