Classification
170 - Ethics
300 - Social sciences
330 - Economics
85
320 - Political science
74
100 - Philosophy & psychology
69
140 - Specific philosophical schools
30
200 - Religion
28
658 - General management
27
600 - Technology
26
340 - Law
24
610 - Medicine & health
23
900 - History & geography
23
302 - Social interaction
22
700 - The arts; fine & decorative arts
22
000 - Computer science, information & general works
16
301 - Sociology & anthropology
16
333 - Economics of land & energy
15
363 - Other social problems & services
14
370 - Education
13
158 - Applied psychology
12
500 - Natural sciences & mathematics
11
331 - Labor economics
10
650 - Management & auxiliary services
9
338 - Production
8
361 - Social problems & social welfare in general
8
380 - Commerce, communications & transportation
8
670 - Manufacturing
8
800 - Literature & rhetoric
8
174 - Occupational ethics
7
304 - Factors affecting social behavior
7
620 - Engineering & allied operations
7
630 - Agriculture & related technologies
6
576 - Genetics & evolution
5
581 - Specific topics in natural history
5
160 - Logic
3
360 - Social problems & services; associations
3
580 - Plants (Botany)
3
004 - Data processing & computer science
2
120 - Epistemology, causation & humankind
2
297 - Islam, Babism & Bahai Faith
2
364 - Criminology
2
530 - Physics
2
551 - Geology, hydrology & meteorology
2
720 - Architecture
2
001 - Knowledge
1
241 - Christian ethics
1
303 - Social processes
1
344 - Labor, social, education & cultural law
1
381 - Commerce
1
384 - Communications; telecommunication
1
more ...