Classification
100 - Philosophy & psychology
300 - Social sciences
340 - Law
600 - Technology
700 - The arts; fine & decorative arts
320 - Political science
2
900 - History & geography
2
000 - Computer science, information & general works
1
170 - Ethics
1
200 - Religion
1
301 - Sociology & anthropology
1
330 - Economics
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
364 - Criminology
1
370 - Education
1
380 - Commerce, communications & transportation
1
400 - Language
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
658 - General management
1
780 - Music
1
800 - Literature & rhetoric
1