Library of Congress

Program for Cooperative Cataloging

The Library of Congress > Cataloging, Acquisitions > PCC > SACO - Subject Authority Cooperative Program

The Subject Authority Cooperative Program (SACO) enables member institutions to submit proposals for additions to Library of Congress Subject Headings (LCSH), Library of Congress Children's Subject Headings (CYAC), Library of Congress Genre/Form Terms (LCGFT), Library of Congress Demographic Group Terms (LCDGT), Library of Congress Medium of Performance Thesaurus for Music (LCMPT), and Library of Congress Classification (LCC) schedules.

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  • Due to the high volume of subject proposals received and an increasingly heavy workload, the Policy, Training, and Cooperative Programs Division (PTCP) has decided temporarily to limit the number of proposals that can be scheduled to each LCSH monthly list, effective immediately. The limit will be 200 proposals. Once that cap is reached each month, only proposals associated with CIP cataloging will continue to be scheduled for the list; other proposals will be held until the following list. (There will be no limit on classification proposals unless they have corresponding LCSH proposals.) We regret that this will result in a delay in scheduling some proposals for a list, but we hope at least it will result in a faster turnaround time for processing each list. PTCP appreciates the community’s support and patience. If you have questions or comments about this temporary measure, please contact [email protected].
  • SACO Training Needs Assessment Report 2023 (July 7, 2023) [PDF: 352 KB]
  • Announcement: Incoming LCSH Proposals: Expedited List Experiment (August 16, 2022) [PDF: 172 KB]
  • Faceted Subject Headings: Exploring the Topic (July 18-19, 2022): Agenda (with links to presentations and recordings) [PDF; 147 KB]
  • CYAC Cataloging Manual Instruction Sheets Posted (March 21, 2022)

Editorial Meetings


Classification Lists (LCC)

Special Projects Lists

Heading change to Noncitizens and Illegal immigration:

SACO Training

SACO training is an essential component of the program. The Volunteer SACO Trainers Group is in the process of developing new training materials to assist the SACO community. For a list of existing resources, please see SACO Resources.

SACO Resources & Forms

SACO members use these resources to create and submit subject and classification proposals.

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SACO partners are key players in the global development of subject access to information resources.

Meetings & Events

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