Dewey Decimal Classification System Chart

Geraldine Postaz

2 min read

·

16-07-2025

47

0

Share

The Dewey Decimal Classification (DDC) system is a widely used library classification system that organizes library materials by subject. Developed by Melvil Dewey in 1876, it's a hierarchical system that assigns a unique number to every topic, allowing for a logical and consistent arrangement of books and other resources. This chart provides a broad overview of the main DDC classes. Understanding this system can significantly enhance your library research skills.

Main Classes of the Dewey Decimal System

The DDC system is divided into ten main classes, each represented by a single digit:

• 000 Computer science, information, & general works: This class encompasses computer science, library science, general encyclopedias, and other general reference materials.

• 100 Philosophy & psychology: This section includes works on philosophy, metaphysics, ethics, logic, and psychology.

• 200 Religion: This broad category covers various religions, including Christianity, Islam, Judaism, and others, as well as comparative religion and religious studies.

• 300 Social sciences: This encompasses a vast range of subjects such as sociology, economics, political science, law, education, and social issues.

• 400 Language: This class includes linguistics, dictionaries, grammar books, and language learning materials for various languages.

• 500 Pure science: This covers mathematics, physics, chemistry, astronomy, biology, and other scientific disciplines.

• 600 Technology: This class encompasses applied sciences, engineering, medicine, agriculture, and technology in general.

• 700 The arts: This includes fine arts such as painting, sculpture, music, performing arts, and architecture.

• 800 Literature: This section covers literature in various languages and forms, including poetry, drama, fiction, and non-fiction.

• 900 Geography & history: This includes geography, history, biography, and genealogy.

Understanding the Decimal System

Each main class is further subdivided into ten subclasses, each represented by a second digit. These subclasses are then further broken down into sections and subsections using additional digits. This allows for a highly detailed and specific classification of materials. For example:

• 500 Pure science: 530 Physics would be further divided, for example, into 530.1 Theoretical Physics.

The more digits added, the more specific the subject becomes. This system allows libraries to arrange books logically, making it easy for users to find information within a specific subject area.

Beyond the Basics

The DDC is constantly updated and revised to reflect changes in knowledge and terminology. While this chart provides a helpful overview, it's important to consult the complete DDC schedule for the most accurate and up-to-date information. Libraries typically have a detailed DDC schedule available for reference.

Conclusion

The Dewey Decimal Classification System is a vital tool for organizing and accessing information in libraries worldwide. Understanding its basic structure can significantly improve your library research experience and help you efficiently locate the materials you need. This system's hierarchical structure ensures that similar topics are grouped together, allowing for a logical and intuitive browsing experience.