Dewey Decimal Classification (DDC)
Reference Sheets

General Information on Dewey Decimal System
Selected Benner Library General Reference Sources (relevant to many topics)
Selected Subject-specific Reference Sources (click on # to see the list):

100: Philosophy & psychology
200: Religion
300: Social sciences (3 page pdf)
400: Language
500: Natural sciences & mathematics
600: Technology-applied sciences
700: The arts
800: Literature & rhetoric
900: Geography & history