The decimal system of classification, also known as the Dewey Decimal System, is a widely-used numerical method for organizing and categorizing knowledge in libraries and other information resources. It was developed by Melvil Dewey in 1876 and is based on the principle of dividing knowledge into ten main subject areas, each of which is further subdivided into more specific and detailed categories.
In the decimal system, each topic is assigned a unique numerical code, consisting of three digits. The first digit represents the general subject area, while the second digit indicates the more specific category within that area. The third digit provides even greater specificity, allowing for precise classification of materials.
This systematic approach ensures that similar topics are grouped together, facilitating easier access and navigation for users. For example, books on history are assigned numbers in the 900s, with further subdivisions for various historical periods and regions. Science is categorized in the 500s, with subcategories such as biology, chemistry, and physics.
The decimal system also allows for flexibility and expansion, as new categories can be easily added by inserting additional numbers between existing ones. This ensures that the system remains adaptable to changing knowledge and evolving subject areas.
Overall, the decimal system of classification provides a structured and efficient way to organize information, enabling users to locate resources quickly and systematically in libraries and other information repositories.
