Classification
100 - Philosophy & psychology
340 - Law
363 - Other social problems & services
320 - Political science
6
170 - Ethics
5
700 - The arts; fine & decorative arts
5
333 - Economics of land & energy
4
581 - Specific topics in natural history
3
140 - Specific philosophical schools
2
200 - Religion
2
300 - Social sciences
2
610 - Medicine & health
2
000 - Computer science, information & general works
1
301 - Sociology & anthropology
1
330 - Economics
1
370 - Education
1
380 - Commerce, communications & transportation
1
500 - Natural sciences & mathematics
1
530 - Physics
1
900 - History & geography
1