Classification
100 - Philosophy & psychology
320 - Political science
900 - History & geography
32
330 - Economics
26
300 - Social sciences
25
140 - Specific philosophical schools
19
170 - Ethics
18
340 - Law
15
200 - Religion
13
700 - The arts; fine & decorative arts
10
301 - Sociology & anthropology
9
333 - Economics of land & energy
9
370 - Education
7
600 - Technology
6
380 - Commerce, communications & transportation
5
576 - Genetics & evolution
5
800 - Literature & rhetoric
5
120 - Epistemology, causation & humankind
3
581 - Specific topics in natural history
3
610 - Medicine & health
3
000 - Computer science, information & general works
2
296 - Judaism
2
304 - Factors affecting social behavior
2
350 - Public administration & military science
2
363 - Other social problems & services
2
551 - Geology, hydrology & meteorology
2
620 - Engineering & allied operations
2
297 - Islam, Babism & Bahai Faith
1
361 - Social problems & social welfare in general
1
364 - Criminology
1
530 - Physics
1
630 - Agriculture & related technologies
1
657 - Accounting
1
770 - Photography, photographs & computer art
1