The Dewey Decimal System is a categorization of books broken down by type and then specifics (i.e. Religion, then Christianity or Hinduism). This allows people looking for a group of books similar to each other, close at hand, not scattered around the media center.
|000 Generalities||100 Psychology||200 Religion|
|300 Social Science||400 Language||500 Natural Science & Mathematics|
|600 Technology (applied sciences)||700 The Arts||800 Literature & Rhetoric|
|900 Geography & History|