Classification
100 - Philosophy & psychology
330 - Economics
700 - The arts; fine & decorative arts
900 - History & geography
320 - Political science
4
363 - Other social problems & services
2
600 - Technology
2
120 - Epistemology, causation & humankind
1
170 - Ethics
1
300 - Social sciences
1
333 - Economics of land & energy
1
340 - Law
1
380 - Commerce, communications & transportation
1
576 - Genetics & evolution
1