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How the Dewey Decimal System Works
How the Dewey Decimal System Works
The Dewey Decimal Classification organizes nonfiction by subject using ten main number ranges—from 000 for general knowledge and computing to 900 for history and geography. Decimals allow librarians to sort topics with increasing precision.
▶ Watch: Dewey Decimal System—History and How It Works
Explore Dewey resources from OCLC
🏛️ The World’s Largest Library
🏛️ The World’s Largest Library
The Library of Congress is the largest library in the world. Its collections include millions of books, recordings, photographs, newspapers, maps, films, and manuscripts.
📜 Rare Treasures
📜 Rare Treasures
The Library of Congress holds the largest rare-book collection in North America and the largest collection of 15th-century books in the Western Hemisphere.
More fascinating Library of Congress facts
🔢 Dewey Keeps Evolving
🔢 Dewey Keeps Evolving
Dewey is not frozen in the past. WebDewey is updated as new subjects and terminology emerge, helping libraries organize knowledge in a changing world.
🗺️ Libraries Preserve More Than Books
🗺️ Libraries Preserve More Than Books
Libraries safeguard maps, music, oral histories, photographs, newspapers, films, websites, and other records of human creativity—not just printed books.
Source: Library of Congress FAQ
💡 Libraries Support Access and Opportunity
💡 Libraries Support Access and Opportunity
The American Library Association describes libraries as vital centers of literacy, access, and opportunity. Modern libraries help people read, research, create, connect, and learn throughout life.
Learn more from the American Library Association
🌽 Illinois Library Organizations
🌽 Illinois Library Organizations
Association of Illinois School Library Educators (AISLE)
Association of Illinois School Library Educators (AISLE)
AISLE provides leadership, professional learning, standards, and practical resources that strengthen school library programs throughout Illinois.
Visit AISLE | Explore Illinois School Library Program Standards
Illinois Library Association (ILA)
Illinois Library Association (ILA)
ILA connects Illinois library professionals and supporters through education, advocacy, events, awards, and statewide initiatives that advance literacy and access to information.
Visit the Illinois Library Association | Explore Illinois Library Advocacy
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