Comparison of Dewey and Library of Congress subject classification - Wikiwand
Dewey Decimal Classification
Used in Hong Kong Public Libraries, school libraries
Dewey Decimal Classification - Wikiwand
List of Dewey Decimal classes - Wikiwand
The Dewey Decimal Classification System
http://www.oclc.org/content/dam/oclc/dewey/versions/print/intro.pdf
Library of Congress Classification
Used in university libraries
Library of Congress Classification - Wikiwand