Classification
140 - Specific philosophical schools
900 - History & geography
14
300 - Social sciences
13
320 - Political science
11
333 - Economics of land & energy
9
340 - Law
9
100 - Philosophy & psychology
6
330 - Economics
5
200 - Religion
4
610 - Medicine & health
4
301 - Sociology & anthropology
3
800 - Literature & rhetoric
3
170 - Ethics
2
363 - Other social problems & services
2
364 - Criminology
2
380 - Commerce, communications & transportation
2
551 - Geology, hydrology & meteorology
2
576 - Genetics & evolution
2
600 - Technology
2
620 - Engineering & allied operations
2
120 - Epistemology, causation & humankind
1
160 - Logic
1
304 - Factors affecting social behavior
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
370 - Education
1
500 - Natural sciences & mathematics
1
590 - Animals (Zoology)
1
700 - The arts; fine & decorative arts
1