Melvil Dewey was one of the most influential librarians of his day and is still one of the most recognized names in librarianship.
Resources for teachers and students
Resources for librarians
Additional Dewey resources
Since the DDC system was created more than 135 years ago, it's easy to assume that the Dewey name is in the public domain. However, it never has been, and since 1988, OCLC Online Computer Library Center has held the trademark on the Dewey name.
If you have interest in licensing the Dewey name for a legitimate business purpose, please contact OCLC first. We have established licensing arrangements that enable other organizations to use the Dewey name while protecting OCLC's trademark rights.
Download the brochure
Learn more about organizing your materials with the world's most widely used library classification system.
(PDF, 363 KB)
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
30 January 2015
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.