Classification
330 - Economics
380 - Commerce, communications & transportation
650 - Management & auxiliary services
658 - General management
384 - Communications; telecommunication
37
158 - Applied psychology
15
302 - Social interaction
15
331 - Labor economics
12
300 - Social sciences
10
338 - Production
5
170 - Ethics
3
670 - Manufacturing
3
000 - Computer science, information & general works
2
140 - Specific philosophical schools
2
150 - Psychology
2
153 - Mental processes & intelligence
2
363 - Other social problems & services
2
381 - Commerce
2
500 - Natural sciences & mathematics
2
657 - Accounting
2
808 - Rhetoric & collections of literature
2
100 - Philosophy & psychology
1
152 - Perception, movement, emotions & drives
1
174 - Occupational ethics
1
320 - Political science
1
333 - Economics of land & energy
1
361 - Social problems & social welfare in general
1
600 - Technology
1
610 - Medicine & health
1