Classification
170 - Ethics
100 - Philosophy & psychology
69
140 - Specific philosophical schools
47
320 - Political science
36
900 - History & geography
30
200 - Religion
20
330 - Economics
17
340 - Law
16
300 - Social sciences
15
600 - Technology
13
610 - Medicine & health
12
700 - The arts; fine & decorative arts
11
800 - Literature & rhetoric
9
380 - Commerce, communications & transportation
8
120 - Epistemology, causation & humankind
7
301 - Sociology & anthropology
7
333 - Economics of land & energy
6
363 - Other social problems & services
6
370 - Education
6
000 - Computer science, information & general works
5
304 - Factors affecting social behavior
4
410 - Linguistics
4
361 - Social problems & social welfare in general
3
360 - Social problems & services; associations
2
400 - Language
2
576 - Genetics & evolution
2
580 - Plants (Botany)
2
581 - Specific topics in natural history
2
160 - Logic
1
296 - Judaism
1
500 - Natural sciences & mathematics
1
551 - Geology, hydrology & meteorology
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
658 - General management
1
770 - Photography, photographs & computer art
1
780 - Music
1
880 - Hellenic literatures; classical Greek
1