Dewey Decimal Classification (DDC)

The Dewey Decimal Classification (DDC) is a system used by libraries to organize books and materials by assigning them numerical codes based on their subject matter. Developed by Melvil Dewey in 1876, it divides knowledge into ten main categories, each represented by a three-digit number (e.g., 100 for philosophy, 500 for science). Within these categories, topics are further subdivided, allowing for more specific classification. This system helps library users easily locate and browse materials, ensuring that related subjects are grouped together, facilitating efficient research and study.