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The easiest way to use DDC

Experience the power of the Dewey Decimal Classification (DDC) system on the Web! WebDewey gives you access to an enhanced version of the DDC database. WebDewey is part of the OCLC suite of cataloging and metadata services that OCLC offers through the OCLC Connexion service. Logon to WebDewey at http://connexion.oclc.org

WebDewey includes:

  • all content from DDC 22, including quarterly updates ( new developments, new built numbers, and additional electronic index terms )
  • updated PPT mappings to Edition 22 numbers in the areas of computer science and law
  • thousands of Library of Congress Subject Headings (LCSH) that have been statistically mapped to Dewey numbers from records in WorldCat (the OCLC Online Union Catalog) and intellectually mapped by DDC editors
  • thousands of Relative Index terms and built numbers not available in print
  • links from mapped LCSH to the LCSH authority records
  • selected mappings from Medical Subject Headings (MeSH)

Let our tutorial show you how WebDewey works! Using WebDewey: An OCLC Tutorial.

Need to incorporate cuttering into your workflows? Dewey Cutter Software automatically provides cutter numbers from the OCLC Four-Figure Cutter Tables (Cutter Four-Figure Table and Cutter-Sanborn Four-Figure Table) when you input text. It works with Windows Millennium, 2000, and XP, and is available for download at no charge. (Note: If your library uses Windows 95, 98, or NT, the Dewey Cutter program should also work on your system; however, these versions are no longer supported by OCLC.) Helpful installation and user instructions get you started with this useful add-on quickly.

WebDewey system requirements include: 300 MHz Pentium II; 64MB RAM; display resolution of 1024 x 768; and the latest version of Microsoft Internet Explorer or Netscape Navigator.

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.