Classification
100 - Philosophy & psychology
320 - Political science
363 - Other social problems & services
900 - History & geography
700 - The arts; fine & decorative arts
6
333 - Economics of land & energy
5
300 - Social sciences
4
200 - Religion
3
330 - Economics
3
581 - Specific topics in natural history
3
610 - Medicine & health
3
000 - Computer science, information & general works
2
170 - Ethics
2
301 - Sociology & anthropology
2
576 - Genetics & evolution
2
600 - Technology
2
800 - Literature & rhetoric
2
120 - Epistemology, causation & humankind
1
140 - Specific philosophical schools
1
340 - Law
1
350 - Public administration & military science
1
361 - Social problems & social welfare in general
1
400 - Language
1
410 - Linguistics
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1