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Dewey® Services

WebDewey: the right tool to organize your collection

WebDewey is the electronic version of the Dewey Decimal Classification (DDC) system. It is a full representation of all published numbers, plus other mappings and new terms that have been approved by the Dewey Editorial Policy Committee (EPC). It puts the power of the world’s most widely used library classification system in the hands of metadata managers to efficiently organize their collection(s).

WebDewey is the easiest way to use the DDC to organize and classify library collections. With WebDewey, metadata managers have the most-up-to-date DDC numbers available that are based on an array of continually evolving topics and languages. WebDewey also includes:

  • searching or browsing DDC numbers, Library of Congress Subject Headings (LCSH) and mapped MeSH headings
  • adding your own notes and displaying them in context
  • an easy-to-navigate, simple user interface that is suitable for the novice as well as the power user

Download the overview demo

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Dewey Print-on-Demand

If you prefer to have offline access to DDC, we have you covered there, too. We now offer a Dewey Print-on-Demand option. This 4-volume set will include the latest changes and topics available in the DDC and will be updated on a biannual basis with releases occurring in January and July moving forward.

If you have any questions, please review the FAQ.


Need to incorporate cuttering into your workflows?

Dewey Cutter software is available for download at no additional charge and automatically provides cutter numbers from the OCLC Four-Figure Cutter Tables when you input text.


"There’s a Dewey for just about anything you’re interested in."

Annie Kemmerling
Manager, Innovation and Initiatives
Denver Public Library
Denver, Colorado, United States

Read Denver Public Library's story

WebDewey screenshots

The Dewey Decimal Classification (DDC) system is the world’s most widely used way to organize library collections. The DDC constantly updates to enable better discovery across any topic in multiple languages. Because the DDC is easy to use, you can increase the visibility of your materials quickly and efficiently.

Service availability

  • Dewey Services

    Available everywhere

Learn more

Download the Dewey Services brochure

Download the Dewey Services brochure
Download the brochure (US Letter)
Download the brochure (A4)

Recent news

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.

All copyright rights in the Dewey Decimal Classification system are owned by OCLC, Inc. Dewey, Dewey Decimal Classification, OCLC and WebDewey are registered trademarks of OCLC, Inc.