Classification
140 - Specific philosophical schools
200 - Religion
320 - Political science
100 - Philosophy & psychology
18
900 - History & geography
18
170 - Ethics
14
300 - Social sciences
14
700 - The arts; fine & decorative arts
14
330 - Economics
10
800 - Literature & rhetoric
9
333 - Economics of land & energy
8
581 - Specific topics in natural history
7
600 - Technology
7
000 - Computer science, information & general works
6
340 - Law
6
363 - Other social problems & services
6
370 - Education
6
301 - Sociology & anthropology
5
380 - Commerce, communications & transportation
4
410 - Linguistics
4
120 - Epistemology, causation & humankind
3
297 - Islam, Babism & Bahai Faith
3
400 - Language
3
304 - Factors affecting social behavior
2
361 - Social problems & social welfare in general
2
610 - Medicine & health
2
780 - Music
2
360 - Social problems & services; associations
1
398 - Folklore
1
520 - Astronomy & allied sciences
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
720 - Architecture
1
901 - Philosophy & theory
1