Classification
153 - Mental processes & intelligence
658 - General management
330 - Economics
12
300 - Social sciences
6
302 - Social interaction
5
338 - Production
5
500 - Natural sciences & mathematics
4
650 - Management & auxiliary services
4
381 - Commerce
3
670 - Manufacturing
3
000 - Computer science, information & general works
1
001 - Knowledge
1