Classification
300 - Social sciences
5
340 - Law
363 - Other social problems & services
5
600 - Technology
900 - History & geography
5
100 - Philosophy & psychology
4
370 - Education
4
000 - Computer science, information & general works
3
200 - Religion
3
320 - Political science
3
620 - Engineering & allied operations
3
120 - Epistemology, causation & humankind
2
170 - Ethics
2
400 - Language
2
301 - Sociology & anthropology
1
330 - Economics
1
380 - Commerce, communications & transportation
1
720 - Architecture
1