noun
Dewey Decimal System
Library classification system dividing knowledge into ten main classes. The term is a direct Japanese translation of the English name.
図書館では十部門分類法を使って本を整理している。
The library organizes books using the Dewey Decimal System.
The Japanese Decimal Classification (NDC), a similar system adapted for Japanese libraries, while 十部門分類法 specifically refers to the Dewey Decimal System.
Compound of 十 (ten), 部門 (division, category), 分類 (classification), and 法 (method, system). A direct calque of the English 'Dewey Decimal System'.