Classification
155 - Differential & developmental psychology
658 - General management
86
158 - Applied psychology
68
330 - Economics
52
302 - Social interaction
41
150 - Psychology
37
153 - Mental processes & intelligence
35
384 - Communications; telecommunication
30
500 - Natural sciences & mathematics
25
650 - Management & auxiliary services
23
331 - Labor economics
20
300 - Social sciences
19
381 - Commerce
12
380 - Commerce, communications & transportation
11
338 - Production
7
000 - Computer science, information & general works
5
170 - Ethics
5
303 - Social processes
5
670 - Manufacturing
5
006 - Special computer methods
4
152 - Perception, movement, emotions & drives
3
510 - Mathematics
2
620 - Engineering & allied operations
2
651 - Office services
2
745 - Decorative arts
2
001 - Knowledge
1
011 - Bibliographies
1
168 - Argument & persuasion
1
179 - Other ethical norms
1
358 - Air & other specialized forces
1
362 - Social welfare problems & services
1
659 - Advertising & public relations
1
808 - Rhetoric & collections of literature
1