Classification
153 - Mental processes & intelligence
330 - Economics
658 - General management
650 - Management & auxiliary services
274
300 - Social sciences
185
302 - Social interaction
165
338 - Production
139
670 - Manufacturing
98
500 - Natural sciences & mathematics
97
158 - Applied psychology
91
331 - Labor economics
85
000 - Computer science, information & general works
45
384 - Communications; telecommunication
34
381 - Commerce
28
380 - Commerce, communications & transportation
20
620 - Engineering & allied operations
16
150 - Psychology
12
001 - Knowledge
10
332 - Financial economics
9
303 - Social processes
8
745 - Decorative arts
7
368 - Insurance
5
808 - Rhetoric & collections of literature
5
005 - Computer programming, programs & data
4
155 - Differential & developmental psychology
4
519 - Probabilities & applied mathematics
3
011 - Bibliographies
2
339 - Macroeconomics & related topics
2
352 - General considerations of public administration
2
659 - Advertising & public relations
2
003 - Systems
1
006 - Special computer methods
1
170 - Ethics
1
204 - Religious experience, life & practice
1
364 - Criminology
1
370 - Education
1
510 - Mathematics
1
600 - Technology
1
615 - Pharmacology & therapeutics
1
629 - Other branches of engineering
1
647 - Management of public households
1
651 - Office services
1
700 - The arts; fine & decorative arts
1
790 - Recreational & performing arts
1
800 - Literature & rhetoric
1