Classification
100 - Philosophy & psychology
320 - Political science
16
900 - History & geography
11
700 - The arts; fine & decorative arts
9
200 - Religion
6
340 - Law
6
170 - Ethics
5
300 - Social sciences
5
330 - Economics
5
333 - Economics of land & energy
5
610 - Medicine & health
5
304 - Factors affecting social behavior
4
363 - Other social problems & services
4
370 - Education
4
120 - Epistemology, causation & humankind
3
140 - Specific philosophical schools
3
301 - Sociology & anthropology
2
380 - Commerce, communications & transportation
2
400 - Language
2
530 - Physics
2
800 - Literature & rhetoric
2
920 - Biography, genealogy & insignia
2
000 - Computer science, information & general works
1
297 - Islam, Babism & Bahai Faith
1
520 - Astronomy & allied sciences
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
620 - Engineering & allied operations
1
658 - General management
1