noun
decimal classification system
Technical term used in computing and library science for organizing items by decimal numbers.
図書館では十進分類体系を使って本を整理している。
The library organizes books using a decimal classification system.
十進分類法 is a more common term for 'decimal classification', while 十進分類体系 emphasizes the systematic structure.
Compound of 十進 (decimal) + 分類 (classification) + 体系 (system). A straightforward technical term.