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Searches for Library of Congress Control Numbers (LCCN), International Standard Book Numbers (ISBN), and International Standard Serial Numbers (ISSN). Numbers must be entered in exact order beginning with the first character.
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One of the Library's most common controlled vocabularies is...
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The Library of Congress is the nation's oldest federal cultural institution, and it serves as the research arm of Congress. It is also the largest library in the world, with more than 162 million items. The collections include books, sound recordings, motion pictures, photographs, maps, and manuscripts.
The Library of Congress Online Catalog contains approximately 14 million records representing books, serials, computer files, manuscripts, cartographic materials, music, sound recordings, and visual materials. The Online Catalog also displays searching aids for users, such as cross-references and scope notes.
One of the Library's most common controlled vocabularies is the Library of Congress Subject Headings (LCSH). In addition to providing cross-references, scope notes identify LC classification numbers associated subject headings and clarify how particular headings have been used in the LC Catalog.
Search the Library's catalog by keyword or browse materials by subject, title, author and more. Explore digitized collections, interact with staff and volunteers, and access popular exhibitions and multimedia.
Advanced Search provides a guided search template that helps you combine keywords found anywhere in the record or in specific record areas (titles, names, subjects, notes, identifiers, publication information, etc.). The Advanced Search shortcut URL is: https://catalog.loc.gov/advanced.
Library of Congress collections contain over 175 million books, periodicals, manuscripts, maps, music, recordings, images, and electronic resources. The LC Catalog contains over 20 million records describing these collections.
