Classification
100 - Philosophy & psychology
320 - Political science
330 - Economics
127
300 - Social sciences
91
900 - History & geography
78
340 - Law
65
170 - Ethics
41
140 - Specific philosophical schools
34
370 - Education
33
700 - The arts; fine & decorative arts
23
301 - Sociology & anthropology
18
200 - Religion
17
380 - Commerce, communications & transportation
16
600 - Technology
15
610 - Medicine & health
14
361 - Social problems & social welfare in general
13
576 - Genetics & evolution
13
333 - Economics of land & energy
12
000 - Computer science, information & general works
11
120 - Epistemology, causation & humankind
11
336 - Public finance
10
620 - Engineering & allied operations
8
304 - Factors affecting social behavior
7
363 - Other social problems & services
7
400 - Language
7
530 - Physics
7
800 - Literature & rhetoric
7
551 - Geology, hydrology & meteorology
6
780 - Music
6
350 - Public administration & military science
4
410 - Linguistics
4
770 - Photography, photographs & computer art
4
500 - Natural sciences & mathematics
3
581 - Specific topics in natural history
3
657 - Accounting
3
720 - Architecture
3
791 - Public performances
3
920 - Biography, genealogy & insignia
3
297 - Islam, Babism & Bahai Faith
2
360 - Social problems & services; associations
2
364 - Criminology
2
658 - General management
2
160 - Logic
1
296 - Judaism
1