Classification
100 - Philosophy & psychology
170 - Ethics
320 - Political science
59
140 - Specific philosophical schools
31
200 - Religion
30
120 - Epistemology, causation & humankind
25
900 - History & geography
23
700 - The arts; fine & decorative arts
20
300 - Social sciences
19
340 - Law
17
370 - Education
17
330 - Economics
14
333 - Economics of land & energy
10
400 - Language
10
600 - Technology
10
610 - Medicine & health
10
380 - Commerce, communications & transportation
8
530 - Physics
8
301 - Sociology & anthropology
7
363 - Other social problems & services
7
000 - Computer science, information & general works
6
361 - Social problems & social welfare in general
3
500 - Natural sciences & mathematics
3
581 - Specific topics in natural history
3
160 - Logic
2
297 - Islam, Babism & Bahai Faith
2
304 - Factors affecting social behavior
2
410 - Linguistics
2
551 - Geology, hydrology & meteorology
2
576 - Genetics & evolution
2
620 - Engineering & allied operations
2
780 - Music
2
360 - Social problems & services; associations
1
364 - Criminology
1
520 - Astronomy & allied sciences
1
580 - Plants (Botany)
1
770 - Photography, photographs & computer art
1
800 - Literature & rhetoric
1