Classification
330 - Economics
7
300 - Social sciences
5
363 - Other social problems & services
4
100 - Philosophy & psychology
2
170 - Ethics
2
320 - Political science
2
600 - Technology
2
700 - The arts; fine & decorative arts
2
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
301 - Sociology & anthropology
1
333 - Economics of land & energy
1
340 - Law
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
720 - Architecture
1
900 - History & geography
1