Classification
100 - Philosophy & psychology
320 - Political science
581 - Specific topics in natural history
14
363 - Other social problems & services
13
170 - Ethics
11
300 - Social sciences
10
700 - The arts; fine & decorative arts
9
330 - Economics
8
340 - Law
8
200 - Religion
7
333 - Economics of land & energy
6
900 - History & geography
6
140 - Specific philosophical schools
5
301 - Sociology & anthropology
4
576 - Genetics & evolution
3
600 - Technology
3
610 - Medicine & health
3
800 - Literature & rhetoric
3
380 - Commerce, communications & transportation
2
530 - Physics
2
551 - Geology, hydrology & meteorology
2
120 - Epistemology, causation & humankind
1
297 - Islam, Babism & Bahai Faith
1
350 - Public administration & military science
1
370 - Education
1
400 - Language
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1