Mapping new LCSH with DDC numbers
You can browse new Library of Congress Subject Headings with suggested DDC numbers for recent topics that are not explicitly mentioned in the current edition of the Dewey Decimal Classification (DDC) system. The Dewey editorial team selects LC subject headings from recent Weekly Lists that are accompanied by candidate numbers from the current DDC edition. The list of DDC numbers is not exhaustive, and you should also consult the DDC schedules and tables before applying a number from the lists.
These lists of LC subject headings were selected from recent Weekly Lists accompanied by candidate DDC numbers from Edition 22. Beginning with Weekly Lists 2004, the headings selected include all LCSH originally recommended by non-U.S. libraries (with the exception of family names). The headings from non-U.S. libraries are marked with an asterisk (*). The purpose of the lists is to provide classifier assistance for topics of recent interest not mentioned explicitly in Edition 22. The DDC numbers listed are not exhaustive, and the schedules and tables should be consulted before applying a number from the lists.
Browse the archive of LCSH postings since 2003.
Thank you for your interest in the DDC. Ongoing access to all updates to the DDC and to the complete list of LCSH/DDC postings is available through WebDewey services.
Download the brochure
Learn more about organizing your materials with the world's most widely used library classification system.
The Dewey blog is a great source for news and views on classification issues as well as interesting and unusual DDC resources and curiosities. It's also a convenient way to share feedback directly to the DDC editors to help shape the future of the DDC.
Past and recorded events
Watch this space for past and recorded Dewey Services events.
Watch this space for Dewey Services news.
Sign up for news and updates on Dewey Services.
Would you like to subscribe to other OCLC e-mails or provide more information on your profile? Providing more information now will make sure you receive the OCLC news that matters most to you.
A message has been sent to your e-mail address. Please follow the link in that e-mail to the page where you can edit your preferences. This is done to ensure that only you can edit your e-mail preferences.
All copyright rights in the Dewey Decimal Classification system are owned by OCLC. Dewey, Dewey Decimal Classification, DDC, OCLC and WebDewey are registered trademarks of OCLC.