Classification
320 - Political science
333 - Economics of land & energy
330 - Economics
43
300 - Social sciences
19
700 - The arts; fine & decorative arts
16
363 - Other social problems & services
14
140 - Specific philosophical schools
11
600 - Technology
11
900 - History & geography
10
100 - Philosophy & psychology
9
340 - Law
8
551 - Geology, hydrology & meteorology
8
581 - Specific topics in natural history
7
610 - Medicine & health
7
370 - Education
5
620 - Engineering & allied operations
5
301 - Sociology & anthropology
4
630 - Agriculture & related technologies
4
350 - Public administration & military science
3
361 - Social problems & social welfare in general
3
200 - Religion
2
297 - Islam, Babism & Bahai Faith
2
304 - Factors affecting social behavior
2
360 - Social problems & services; associations
2
380 - Commerce, communications & transportation
2
576 - Genetics & evolution
2
720 - Architecture
2
120 - Epistemology, causation & humankind
1
170 - Ethics
1
400 - Language
1