Classification
140 - Specific philosophical schools
320 - Political science
600 - Technology
15
380 - Commerce, communications & transportation
13
700 - The arts; fine & decorative arts
12
330 - Economics
11
000 - Computer science, information & general works
10
300 - Social sciences
10
340 - Law
8
363 - Other social problems & services
8
370 - Education
8
900 - History & geography
8
200 - Religion
6
581 - Specific topics in natural history
6
610 - Medicine & health
6
100 - Philosophy & psychology
5
304 - Factors affecting social behavior
5
333 - Economics of land & energy
5
301 - Sociology & anthropology
4
576 - Genetics & evolution
4
120 - Epistemology, causation & humankind
3
551 - Geology, hydrology & meteorology
3
620 - Engineering & allied operations
3
170 - Ethics
2
297 - Islam, Babism & Bahai Faith
2
361 - Social problems & social welfare in general
2
658 - General management
2
800 - Literature & rhetoric
2
400 - Language
1
410 - Linguistics
1
414 - Phonology & phonetics
1
630 - Agriculture & related technologies
1
720 - Architecture
1