Classification
100 - Philosophy & psychology
158
320 - Political science
158
170 - Ethics
40
900 - History & geography
34
300 - Social sciences
20
700 - The arts; fine & decorative arts
18
340 - Law
17
140 - Specific philosophical schools
14
200 - Religion
11
120 - Epistemology, causation & humankind
10
330 - Economics
10
400 - Language
8
301 - Sociology & anthropology
7
304 - Factors affecting social behavior
6
333 - Economics of land & energy
6
370 - Education
6
363 - Other social problems & services
5
380 - Commerce, communications & transportation
5
600 - Technology
5
576 - Genetics & evolution
4
361 - Social problems & social welfare in general
3
530 - Physics
3
581 - Specific topics in natural history
3
610 - Medicine & health
3
000 - Computer science, information & general works
2
160 - Logic
1
172 - Political ethics
1
296 - Judaism
1
297 - Islam, Babism & Bahai Faith
1
360 - Social problems & services; associations
1
410 - Linguistics
1
551 - Geology, hydrology & meteorology
1
620 - Engineering & allied operations
1
658 - General management
1