Classification
650 - Management & auxiliary services
658 - General management
2,071
330 - Economics
1,719
158 - Applied psychology
1,101
331 - Labor economics
419
302 - Social interaction
392
338 - Production
377
153 - Mental processes & intelligence
369
300 - Social sciences
355
381 - Commerce
187
670 - Manufacturing
160
500 - Natural sciences & mathematics
154
000 - Computer science, information & general works
131
384 - Communications; telecommunication
130
380 - Commerce, communications & transportation
73
150 - Psychology
66
170 - Ethics
55
005 - Computer programming, programs & data
46
332 - Financial economics
37
006 - Special computer methods
36
320 - Political science
34
001 - Knowledge
30
800 - Literature & rhetoric
30
155 - Differential & developmental psychology
24
620 - Engineering & allied operations
24
174 - Occupational ethics
22
657 - Accounting
20
745 - Decorative arts
19
011 - Bibliographies
17
340 - Law
17
004 - Data processing & computer science
14
152 - Perception, movement, emotions & drives
14
600 - Technology
13
700 - The arts; fine & decorative arts
13
610 - Medicine & health
12
659 - Advertising & public relations
12
303 - Social processes
11
333 - Economics of land & energy
11
510 - Mathematics
9
339 - Macroeconomics & related topics
8
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
808 - Rhetoric & collections of literature
5
306 - Culture & institutions
4
576 - Genetics & evolution
4
020 - Library & information sciences
3
more ...