Classification
300 - Social sciences
330 - Economics
650 - Management & auxiliary services
658 - General management
302 - Social interaction
225
158 - Applied psychology
181
500 - Natural sciences & mathematics
108
670 - Manufacturing
103
338 - Production
99
153 - Mental processes & intelligence
91
331 - Labor economics
66
381 - Commerce
27
384 - Communications; telecommunication
17
170 - Ethics
9
380 - Commerce, communications & transportation
9
620 - Engineering & allied operations
8
000 - Computer science, information & general works
7
001 - Knowledge
7
150 - Psychology
4
155 - Differential & developmental psychology
3
303 - Social processes
3
610 - Medicine & health
3
659 - Advertising & public relations
3
745 - Decorative arts
3
005 - Computer programming, programs & data
2
152 - Perception, movement, emotions & drives
2
174 - Occupational ethics
2
320 - Political science
2
332 - Financial economics
2
006 - Special computer methods
1
340 - Law
1
352 - General considerations of public administration
1
361 - Social problems & social welfare in general
1
629 - Other branches of engineering
1
651 - Office services
1
800 - Literature & rhetoric
1