Classification
170 - Ethics
658 - General management
330 - Economics
124
158 - Applied psychology
52
650 - Management & auxiliary services
40
331 - Labor economics
39
174 - Occupational ethics
38
300 - Social sciences
24
302 - Social interaction
23
338 - Production
19
670 - Manufacturing
12
380 - Commerce, communications & transportation
7
500 - Natural sciences & mathematics
7
610 - Medicine & health
7
381 - Commerce
6
384 - Communications; telecommunication
6
304 - Factors affecting social behavior
5
800 - Literature & rhetoric
5
000 - Computer science, information & general works
4
140 - Specific philosophical schools
4
320 - Political science
4
333 - Economics of land & energy
4
153 - Mental processes & intelligence
3
340 - Law
3
700 - The arts; fine & decorative arts
3
001 - Knowledge
2
100 - Philosophy & psychology
2
200 - Religion
2
303 - Social processes
2
332 - Financial economics
2
363 - Other social problems & services
2
368 - Insurance
2
576 - Genetics & evolution
2
620 - Engineering & allied operations
2
659 - Advertising & public relations
2
900 - History & geography
2
004 - Data processing & computer science
1
011 - Bibliographies
1
152 - Perception, movement, emotions & drives
1
179 - Other ethical norms
1
201 - Religious mythology & social theology
1
261 - Social theology
1
346 - Private law
1
350 - Public administration & military science
1
355 - Military science
1
370 - Education
1
398 - Folklore
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
600 - Technology
1
more ...