Dewey Decimal Classification System

The Dewey Decimal Classification system, created by Melvil Dewey to classify library materials, organizes human knowledge into ten main classes or topic areas. These ten general topic areas are represented by numbers:

	000 Generalities
	100 Philosophy
	200 Religion
	300 Social sciences
	400 Language
	500 Natural sciences & mathematics
	600 Technology (Applied sciences)
	700 The Arts
	800 Literature & rhetoric
	900 Geography & history These general categories break down into more specific categories.