Library of Congress

Program for Cooperative Cataloging

The Library of Congress > Cataloging, Acquisitions > PCC > NACO - Name Authority Cooperative Program

Through this program, participants contribute authority records for agents, places, works, and expressions to the LC/NACO Authority File. Membership in NACO is open to individual institutions willing to support their staff through a process of training, review, and direct contributions of records to the LC/NACO Name Authority File.

Please note: Library of Congress fiscal 2023 appropriations will expire on September 30, 2023. If appropriations for fiscal 2024 are not enacted by this date, the Library will be closed. Until the Library reopens, meetings will be canceled and rescheduled for a later date. Email accounts and discussion lists ending in "" (coop, policy, pccd, naco, etc.) will not be monitored. LC has taken steps to ensure that staff who process NACO contribution/distribution will be available in case there are problems, so NACO processes can continue without interruption. Classification Web Plus and the PCC Directory will continue to function, but no support services will be available. For updates, please monitor the news or call the Library of Congress information line at (202) 707-5000.

Recent Documentation & Updates

See all NACO documentation & updates


The PCC affords participants a full course of specialized NACO training and review leading to institutional independence in name authority work. This training is currently offered sequentially in segments that amount to a five day workshop. During the training, guidelines are discussed and expanded upon with an emphasis on building a consistent and predictable file in a collaborative environment.

Learn more about NACO training

NACO Funnels

A NACO funnel project is a group of libraries that have joined together to contribute name authority records to the national authority file.

Read more about NACO funnels

NACO Resources & Forms

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NACO partners are global leaders in uniquely identifying authorized names in international databases.

Meetings & Events

Authority Control FAQs

View all Cataloging FAQs

NACO Advisory Group

    The NACO Advisory Group is a PCC group that monitors PCC listserv discussion of NACO-related topics, and provides input when a NACO-related topic appears to be unresolved, unanswered, or ambiguously answered, in routine PCC listserv discussion. The advisory group may refer to existing NACO documentation, refer to a NACO best practice, or indicate that the topic may need additional investigation and policy discussion.

  • More about the NACO Advisory Group

Contact NACO


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