We publish and distribute all of the Library of Congress cataloging records and cataloging-related publications, tools, and resources. Whether you need web-based cataloging tools, cataloging manuals, cataloging records, or MARC documentation, the Cataloging Distribution Service (CDS) provides the most current and authoritative bibliographic resources produced by the Library of Congress.
Classification Web
The only web-based subscription service that features the entire Library of Congress Classification and the complete Library of Congress Subject Headings. Updated daily. Free trial available.
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Cataloger's Desktop
More than 300 of the most important cataloging and metadata resources—available 24-7. Web-based subscription service. Free trial available.
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MARC Distribution Services
The premier source for Library of Congress bibliographic and authority records. Fourteen database services offered in hundreds of languages and distributed via FTP (file transfer protocol).
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Product Categories
See the range of publications CDS produces: nearly 100 cataloging-related print publications as well as bibliographic databases, web-based subscription services for catalogers, and free downloads of selected publications.
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NEW EDITIONS: Library of Congress Classification Schedules
More about the new, 2010 editions of N: Fine Arts, PN: Literature (General), and P-PZ Tables: Language and Literature Tables.
NEW: Subject Headings Manual Update no. 2, 2010
Just published - the second and last update of 2010. More about Subject Headings Manual Update no. 2, 2010Library of Congress Subject Headings, 32nd edition (2010)
The new edition of the most comprehensive list of subject headings in print in the world is now available. More about Library of Congress Subject Headings, 32nd edition
Library of Congress Rule Interpretations, Update No. 3 (2010)
More about Library of Congress Rule Interpretations, Updates No. 3
NEW: MARC 21 Update No. 10 & 11 (2009/2010)
The latest annual MARC 21 format update is now available. More about MARC 21 Update No. 10 & 11 (2009/2010)
MDS Technical Notices
Read the latest MARC Distribution Services technical notice.
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