Classification
650 - Management & auxiliary services
658 - General management
2,067
330 - Economics
1,663
158 - Applied psychology
1,069
331 - Labor economics
401
302 - Social interaction
389
338 - Production
363
153 - Mental processes & intelligence
353
300 - Social sciences
351
381 - Commerce
177
670 - Manufacturing
155
500 - Natural sciences & mathematics
152
000 - Computer science, information & general works
135
384 - Communications; telecommunication
127
380 - Commerce, communications & transportation
70
150 - Psychology
64
170 - Ethics
54
005 - Computer programming, programs & data
46
332 - Financial economics
37
006 - Special computer methods
36
320 - Political science
34
800 - Literature & rhetoric
30
001 - Knowledge
28
620 - Engineering & allied operations
24
155 - Differential & developmental psychology
22
174 - Occupational ethics
21
657 - Accounting
19
745 - Decorative arts
19
340 - Law
15
004 - Data processing & computer science
14
011 - Bibliographies
14
152 - Perception, movement, emotions & drives
14
700 - The arts; fine & decorative arts
13
600 - Technology
12
610 - Medicine & health
12
659 - Advertising & public relations
12
303 - Social processes
11
333 - Economics of land & energy
11
339 - Macroeconomics & related topics
8
510 - Mathematics
7
304 - Factors affecting social behavior
6
361 - Social problems & social welfare in general
6
350 - Public administration & military science
5
363 - Other social problems & services
5
580 - Plants (Botany)
5
640 - Home & family management
5
576 - Genetics & evolution
4
808 - Rhetoric & collections of literature
4
020 - Library & information sciences
3
306 - Culture & institutions
3
more ...