Classification
170 - Ethics
330 - Economics
320 - Political science
229
658 - General management
117
174 - Occupational ethics
70
158 - Applied psychology
59
300 - Social sciences
56
331 - Labor economics
47
650 - Management & auxiliary services
47
100 - Philosophy & psychology
45
338 - Production
32
302 - Social interaction
29
333 - Economics of land & energy
29
140 - Specific philosophical schools
25
340 - Law
23
700 - The arts; fine & decorative arts
23
900 - History & geography
23
610 - Medicine & health
22
363 - Other social problems & services
20
600 - Technology
19
000 - Computer science, information & general works
15
400 - Language
15
200 - Religion
14
620 - Engineering & allied operations
14
380 - Commerce, communications & transportation
13
670 - Manufacturing
12
370 - Education
11
500 - Natural sciences & mathematics
9
304 - Factors affecting social behavior
8
551 - Geology, hydrology & meteorology
8
332 - Financial economics
7
381 - Commerce
7
581 - Specific topics in natural history
7
800 - Literature & rhetoric
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
004 - Data processing & computer science
2
128 - Humankind
2
297 - Islam, Babism & Bahai Faith
2
339 - Macroeconomics & related topics
2
350 - Public administration & military science
2
368 - Insurance
2
630 - Agriculture & related technologies
2
657 - Accounting
2
720 - Architecture
2
006 - Special computer methods
1
120 - Epistemology, causation & humankind
1
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