Dewey Decimal System

/ ˈdjuːɪ /

noun

1. a frequently used system of library book classification and arrangement with ten main subject classes Also calleddecimal classification DDS

Dewey decimal system

1. A system used in libraries for the classification of books and other publications. It uses the numbers 000 to 999 to cover the general fields of knowledge and subdivides each field by the use of decimals and letters. Named after its inventor, Melvil Dewey.

Word History and Origins

Origin of Dewey Decimal System¹

C19: named after Melvil Dewey (1851–1931), US educator who invented the system