Classification
153 - Mental processes & intelligence
658 - General management
330 - Economics
15
650 - Management & auxiliary services
6
338 - Production
4
302 - Social interaction
3
000 - Computer science, information & general works
2
300 - Social sciences
2
331 - Labor economics
2
384 - Communications; telecommunication
2
670 - Manufacturing
2
150 - Psychology
1
158 - Applied psychology
1
303 - Social processes
1
368 - Insurance
1
380 - Commerce, communications & transportation
1
381 - Commerce
1
500 - Natural sciences & mathematics
1
620 - Engineering & allied operations
1