Library of Congress

Cataloging Distribution Service

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Cataloging Distribution Service

We publish and distribute all of the Library of Congress cataloging records and cataloging-related tools and resources. Whether you need web-based cataloging tools or cataloging records in various formats, 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 and Name Headings. Updated daily. Free trial available.

Read more about Classification Web

Cataloger's Desktop

More than 300 of the most important cataloging and metadata resources—available 24-7. Web-based subscription service. Free trial available.
Read more about Cataloger's Desktop

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).
Read more about MARC Distribution Services

Product Categories

On one web page, see the range of products CDS packages and distributes as bibliographic databases, web-based subscription services for catalogers, and free downloads of selected publications.
Read more about all of our products

CDS Price List

Download the Web Subscription Services & MARC Distribution Services Price List

Telephone Number Change

CDS's "toll-free in U.S." telephone number is now 1-855-266-1884.


LC Classification Schedules A-Z package is no longer available

Contact CDS customer service for the availability of individual printed class schedules

Library of Congress Transitions to Free, Online-Only Cataloging Publications

Read the press release

Get the Most From RDA - in Cataloger's Desktop

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Learn How to Use Tables in Class Web

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Cataloger's Desktop Credit Card Payment Option When Renewing Your Subscription

Class Web Credit Card Payment Option

Check Policy When Ordering from CDS

Print Product Update

News about changes in content delivery for selected print publications.

MDS Technical Notices

Read the latest MARC Distribution Services technical notice.

CDS Customer Satisfaction Survey (CDS Survey).

Please take this brief survey to help us serve you better.