Classification
170 - Ethics
100 - Philosophy & psychology
47
140 - Specific philosophical schools
35
320 - Political science
29
900 - History & geography
20
330 - Economics
10
600 - Technology
10
200 - Religion
9
340 - Law
8
300 - Social sciences
7
120 - Epistemology, causation & humankind
6
301 - Sociology & anthropology
6
610 - Medicine & health
6
800 - Literature & rhetoric
6
000 - Computer science, information & general works
5
333 - Economics of land & energy
5
380 - Commerce, communications & transportation
5
700 - The arts; fine & decorative arts
5
370 - Education
3
304 - Factors affecting social behavior
2
360 - Social problems & services; associations
2
361 - Social problems & social welfare in general
2
363 - Other social problems & services
2
400 - Language
2
410 - Linguistics
2
576 - Genetics & evolution
2
581 - Specific topics in natural history
2
160 - Logic
1
296 - Judaism
1
500 - Natural sciences & mathematics
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
658 - General management
1