Classification
153 - Mental processes & intelligence
158 - Applied psychology
330 - Economics
658 - General management
650 - Management & auxiliary services
82
300 - Social sciences
30
302 - Social interaction
24
331 - Labor economics
16
338 - Production
15
670 - Manufacturing
15
381 - Commerce
10
500 - Natural sciences & mathematics
9
150 - Psychology
7
384 - Communications; telecommunication
5
000 - Computer science, information & general works
3
745 - Decorative arts
3
155 - Differential & developmental psychology
2
620 - Engineering & allied operations
2
170 - Ethics
1
204 - Religious experience, life & practice
1
303 - Social processes
1
800 - Literature & rhetoric
1