Classification
170 - Ethics
330 - Economics
320 - Political science
232
658 - General management
124
174 - Occupational ethics
74
158 - Applied psychology
59
300 - Social sciences
59
331 - Labor economics
50
650 - Management & auxiliary services
48
100 - Philosophy & psychology
46
333 - Economics of land & energy
32
338 - Production
32
302 - Social interaction
29
140 - Specific philosophical schools
27
700 - The arts; fine & decorative arts
26
900 - History & geography
25
340 - Law
23
363 - Other social problems & services
23
610 - Medicine & health
22
600 - Technology
19
000 - Computer science, information & general works
18
200 - Religion
18
400 - Language
15
380 - Commerce, communications & transportation
14
620 - Engineering & allied operations
14
670 - Manufacturing
12
370 - Education
11
500 - Natural sciences & mathematics
10
304 - Factors affecting social behavior
9
381 - Commerce
8
551 - Geology, hydrology & meteorology
8
800 - Literature & rhetoric
8
332 - Financial economics
7
581 - Specific topics in natural history
7
384 - Communications; telecommunication
5
301 - Sociology & anthropology
4
659 - Advertising & public relations
4
001 - Knowledge
3
361 - Social problems & social welfare in general
3
630 - Agriculture & related technologies
3
006 - Special computer methods
2
128 - Humankind
2
153 - Mental processes & intelligence
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
657 - Accounting
2
more ...