Classification
300 - Social sciences
302 - Social interaction
330 - Economics
650 - Management & auxiliary services
658 - General management
158 - Applied psychology
131
500 - Natural sciences & mathematics
102
670 - Manufacturing
101
153 - Mental processes & intelligence
78
338 - Production
63
331 - Labor economics
29
381 - Commerce
21
384 - Communications; telecommunication
14
620 - Engineering & allied operations
8
001 - Knowledge
6
380 - Commerce, communications & transportation
6
000 - Computer science, information & general works
5
150 - Psychology
3
155 - Differential & developmental psychology
3
745 - Decorative arts
3
152 - Perception, movement, emotions & drives
2
303 - Social processes
2
332 - Financial economics
2
610 - Medicine & health
2
005 - Computer programming, programs & data
1
006 - Special computer methods
1
170 - Ethics
1
174 - Occupational ethics
1
629 - Other branches of engineering
1
651 - Office services
1
659 - Advertising & public relations
1