Classification
100 - Philosophy & psychology
320 - Political science
576 - Genetics & evolution
600 - Technology
900 - History & geography
300 - Social sciences
2
330 - Economics
2
340 - Law
2
120 - Epistemology, causation & humankind
1
140 - Specific philosophical schools
1
301 - Sociology & anthropology
1
333 - Economics of land & energy
1
350 - Public administration & military science
1
363 - Other social problems & services
1
370 - Education
1
581 - Specific topics in natural history
1
610 - Medicine & health
1
620 - Engineering & allied operations
1