Dewey decimal system, theDew‧ey dec‧i‧mal sys‧tem, the /ˌdjuːi ˈdesɪməl ˌsɪstɪm $ ˌduːi-/ (also the ˌDewey ˌDecimal Classifiˈcation) 
a system used by libraries for putting books into groups according to their subject. General subjects for example, English literature) are given a number, and then particular parts of this subject (for example, Jane austen's novels) are each given a more specific number using decimal numbers. The system was invented by Melvil Dewey (1851–1931) , a US librarian.
a system used by libraries for putting books into groups according to their subject. General subjects for example, English literature) are given a number, and then particular parts of this subject (for example, Jane austen's novels) are each given a more specific number using decimal numbers. The system was invented by Melvil Dewey (1851–1931) , a US librarian.