Classification
140 - Specific philosophical schools
170 - Ethics
320 - Political science
100 - Philosophy & psychology
28
200 - Religion
14
340 - Law
11
300 - Social sciences
10
700 - The arts; fine & decorative arts
9
330 - Economics
8
333 - Economics of land & energy
8
900 - History & geography
8
600 - Technology
7
301 - Sociology & anthropology
5
363 - Other social problems & services
4
581 - Specific topics in natural history
4
000 - Computer science, information & general works
3
304 - Factors affecting social behavior
3
370 - Education
3
400 - Language
3
620 - Engineering & allied operations
3
800 - Literature & rhetoric
3
120 - Epistemology, causation & humankind
2
361 - Social problems & social welfare in general
2
410 - Linguistics
2
610 - Medicine & health
2
630 - Agriculture & related technologies
2
296 - Judaism
1
360 - Social problems & services; associations
1
380 - Commerce, communications & transportation
1
520 - Astronomy & allied sciences
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1