Classification
100 - Philosophy & psychology
320 - Political science
330 - Economics
300 - Social sciences
66
340 - Law
66
900 - History & geography
59
170 - Ethics
39
200 - Religion
27
140 - Specific philosophical schools
21
333 - Economics of land & energy
20
700 - The arts; fine & decorative arts
17
600 - Technology
16
361 - Social problems & social welfare in general
13
363 - Other social problems & services
13
370 - Education
12
610 - Medicine & health
12
000 - Computer science, information & general works
11
380 - Commerce, communications & transportation
11
336 - Public finance
10
576 - Genetics & evolution
10
301 - Sociology & anthropology
9
630 - Agriculture & related technologies
9
400 - Language
8
780 - Music
8
800 - Literature & rhetoric
8
620 - Engineering & allied operations
7
410 - Linguistics
6
350 - Public administration & military science
5
551 - Geology, hydrology & meteorology
5
581 - Specific topics in natural history
5
530 - Physics
4
658 - General management
4
304 - Factors affecting social behavior
3
500 - Natural sciences & mathematics
3
720 - Architecture
3
770 - Photography, photographs & computer art
3
657 - Accounting
2
120 - Epistemology, causation & humankind
1
160 - Logic
1
297 - Islam, Babism & Bahai Faith
1
360 - Social problems & services; associations
1
550 - Earth sciences
1
580 - Plants (Botany)
1
920 - Biography, genealogy & insignia
1