Classification
100 - Philosophy & psychology
264
320 - Political science
264
900 - History & geography
80
170 - Ethics
67
300 - Social sciences
64
200 - Religion
54
330 - Economics
33
700 - The arts; fine & decorative arts
33
340 - Law
32
140 - Specific philosophical schools
25
120 - Epistemology, causation & humankind
17
301 - Sociology & anthropology
17
400 - Language
17
600 - Technology
15
333 - Economics of land & energy
12
363 - Other social problems & services
12
370 - Education
12
576 - Genetics & evolution
12
380 - Commerce, communications & transportation
11
530 - Physics
11
000 - Computer science, information & general works
10
610 - Medicine & health
8
620 - Engineering & allied operations
8
304 - Factors affecting social behavior
7
410 - Linguistics
7
581 - Specific topics in natural history
7
780 - Music
6
361 - Social problems & social welfare in general
5
800 - Literature & rhetoric
5
551 - Geology, hydrology & meteorology
4
720 - Architecture
4
350 - Public administration & military science
3
160 - Logic
2
296 - Judaism
2
297 - Islam, Babism & Bahai Faith
2
630 - Agriculture & related technologies
2
770 - Photography, photographs & computer art
2
360 - Social problems & services; associations
1
658 - General management
1
920 - Biography, genealogy & insignia
1