Classification
170 - Ethics
330 - Economics
320 - Political science
343
658 - General management
128
300 - Social sciences
85
174 - Occupational ethics
74
158 - Applied psychology
63
100 - Philosophy & psychology
58
650 - Management & auxiliary services
51
331 - Labor economics
48
340 - Law
38
900 - History & geography
37
333 - Economics of land & energy
35
338 - Production
34
302 - Social interaction
30
140 - Specific philosophical schools
28
700 - The arts; fine & decorative arts
28
363 - Other social problems & services
27
200 - Religion
24
610 - Medicine & health
24
600 - Technology
22
000 - Computer science, information & general works
18
370 - Education
18
400 - Language
17
380 - Commerce, communications & transportation
16
620 - Engineering & allied operations
15
670 - Manufacturing
12
304 - Factors affecting social behavior
10
500 - Natural sciences & mathematics
10
551 - Geology, hydrology & meteorology
9
800 - Literature & rhetoric
8
332 - Financial economics
7
381 - Commerce
7
581 - Specific topics in natural history
7
361 - Social problems & social welfare in general
6
384 - Communications; telecommunication
6
160 - Logic
5
301 - Sociology & anthropology
4
659 - Advertising & public relations
4
001 - Knowledge
3
630 - Agriculture & related technologies
3
657 - Accounting
3
004 - Data processing & computer science
2
128 - Humankind
2
297 - Islam, Babism & Bahai Faith
2
303 - Social processes
2
339 - Macroeconomics & related topics
2
350 - Public administration & military science
2
368 - Insurance
2
576 - Genetics & evolution
2
more ...