Librarians and Archivists
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Library of Congress Online Catalog
Search and browse more than 14 million bibliographic records for materials in the Library's diverse collections.

Library of Congress Authorities
Browse and view authority headings for subjects, names, titles and name/title combinations.

Prints/Photographs Online Catalog
Search and view digital images representing a rich cross-section of still pictures held by the Library. [PPOC]

Sound Online Inventory & Catalog
Search a catalog of 78s, 45s, copyright cassettes and broadcast and archival recordings. [SONIC]

Z39.50 Gateway to Library Catalogs
Gateway access to the Library of Congress catalog as well as other libraries across the globe.

|| Reading & Literacy  ||

• National Book Festival
• Center for the Book
• Lifelong Literacy
• Poetry & Literature

• LC Classification Outline
• MARC 21 Documentation
• RDA: Resource Description & Access

|| People  ||

• Jobs & Internships
• Services for Federal Libraries
• Tours/Professional Visits
• Webcasts for Librarians

|| Products & Services  ||

• Ask a Librarian
• Catalog Tools & Products (CDS)
• Duplication Services
• Emergency Preparedness
• Interlibrary Loan
• Publications, Reports, Speeches

|| Best Practices & Standards  ||

• Authorities & Vocabularies (id.loc.gov)
• Finding Aids (EAD)
• Future of Bibliographic Control
• ISO 639-2 or 639-5 (Language Codes)
• MARC Standards
• Metadata (METS, MODS, PREMIS)
• RDA: Resource Description & Access
• Search/Retrieval (SRU, Z39.50)
• Thesauri & Controlled Vocabularies

|| Library Functions  ||

• Acquisitions
• Archival Description
• Building Digital Collections
• Cataloging, Classification
• Digital Reference
• Collection Development
• Cooperative Programs (PCC)
• Preservation
• Public Service, Reference
• Standards