Classification
658 - General management
21
300 - Social sciences
15
330 - Economics
13
302 - Social interaction
10
338 - Production
7
331 - Labor economics
5
153 - Mental processes & intelligence
3
000 - Computer science, information & general works
2
005 - Computer programming, programs & data
2
670 - Manufacturing
2
158 - Applied psychology
1
303 - Social processes
1
380 - Commerce, communications & transportation
1
384 - Communications; telecommunication
1
500 - Natural sciences & mathematics
1
650 - Management & auxiliary services
1