The Dewey Decimal System is a library classification system developed by Melvil Dewey in 1876. It is a numerical scheme that organizes library materials into specific subject categories, allowing for efficient organization and retrieval of information.
This system divides knowledge into ten main classes, each identified by a specific numerical range starting from 000 to 999. Each main class is further divided into subdivisions as decimal numbers are added after the main class number. This hierarchical structure enables a multidisciplinary approach to categorizing library resources.
For example, the 100s represent philosophy and psychology, with 100 reserved for philosophy, 200 for religion, 300 for social sciences, and so on. Within the 300s, a specific subject area such as sociology may be further divided into smaller sections using decimal numbers, such as 301 for sociology theory, 302 for social interaction, or 303 for social processes.
The Dewey Decimal System allows librarians to assign unique call numbers to each item in the library, making it easier for patrons to locate books or other materials by browsing the shelves or searching the online catalog.
Overall, the Dewey Decimal System revolutionized library organization by providing a standardized method for classifying and retrieving information, enabling efficient access to a wide range of subjects across libraries worldwide.
