Meaning of Dewey decimal classification

Dew'ey dec'imal classifica"tion

Pronunciation: [key]
— Trademark. Trademark.
  1. a system of classifying books and other works into ten main classes of knowledge with further subdivision in these classes by use of the numbers of a decimal system: devised by Melvil Dewey, published in 1876, and used in many libraries in the U.S. and elsewhere.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.