An index produced by the Research Libraries Group to finding aids and other descriptive information about the holdings of manuscript and archival collections in libraries and research institutions throughout the world

This resource provides access to an integrated database of three major information resources (NUCMC--National Union Catalog of Manuscript Collections, NIDS--National Inventory of Documentary Resources in the United States, and DAMRUS--Directory of Archives and Manuscript Repositories in the United States). ArchivesUSA gives access to holdings and contact information of more than 4,400 repositories, and indexes to nearly 100,000 special collections. Coverage: Current edition. Updates: Continuous.