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![Library of Congress Online Catalog](images/home_catalog.jpg)
Library of Congress Online Catalog
Contains 15 million catalog records for books, serials, manuscripts, maps, music, recordings, images, and electronic resources. Search the LC Online Catalog
![Library of Congress Authorities](images/home_authorities.jpg)
Library of Congress Authorities
Browse and view authority headings for subjects, names, titles and name/title combinations. Browse LC Authorities
![Prints and Photographs Online Catalog](images/home_ppoc.jpg)
Prints and Photographs Online Catalog (PPOC)
Search and view digital images representing a rich cross-section of still pictures held by the Library. Search PPOC
![Search Library of Congress Finding Aids](images/home_findingaids.jpg)
Finding Aids: Encoded Archival Descrition
A gateway to this wealth of Library treasures, helping you discover and navigate through the thousands of boxes and folders that house each collection. Search and Browse Finding Aids
![Sound Online Inventory and Catalog (SONIC)](images/home_sonic.jpg)
Sound Online Inventory & Catalog (SONIC)
Search a catalog of 78s, 45s, copyright cassettes and broadcast and archival recordings. Search SONIC
![Z39.50 Gateway](images/home_z3950.jpg)
Z39.50 Gateway to Library Catalogs
Gateway access to the Library of Congress catalog as well as other libraries across the globe. Search the Z39.50 Gateway
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