Classification
153 - Mental processes & intelligence
300 - Social sciences
302 - Social interaction
330 - Economics
650 - Management & auxiliary services
658 - General management
338 - Production
26
500 - Natural sciences & mathematics
26
670 - Manufacturing
26
158 - Applied psychology
20
331 - Labor economics
8
381 - Commerce
6
000 - Computer science, information & general works
3
384 - Communications; telecommunication
3
745 - Decorative arts
3
001 - Knowledge
2
620 - Engineering & allied operations
2
150 - Psychology
1
332 - Financial economics
1
380 - Commerce, communications & transportation
1
629 - Other branches of engineering
1
659 - Advertising & public relations
1