Dewey+Decimal+System

http://www.library.illinois.edu/ugl/about/dewey.html
 * What is it and how does it work?[[image:dd notational chart width="426" height="353" align="right"]]**

[|000 Generalities] [|100 Philosophy & psychology] [|200 Religion] [|300 Social sciences] [|400 Language] [|500 Natural sciences & mathematics] [|600 Technology (Applied sciences)] [|700 The arts] [|800 Literature & rhetoric] [|900 Geography & history]

[]
 * Do We Know Dewey **

Imagine a system that allows people to find books all over the world in millions of libraries []

**OCLC** is a nonprofit, membership, computer library service and research organization dedicated to the public purposes of furthering access to the world’s information and reducing information costs. More than 72,000 libraries in 171 countries and territories around the world have used OCLC services to locate, acquire, catalog, lend and preserve library materials []
 * The world's libraries all connected **

**WorldCat** is a global network of library-management and user-facing services built upon cooperatively-maintained databases of bibliographic and institutional metadata. []