Classification
300 - Social sciences
330 - Economics
320 - Political science
3,290
658 - General management
2,288
302 - Social interaction
1,866
500 - Natural sciences & mathematics
1,407
670 - Manufacturing
1,370
338 - Production
608
630 - Agriculture & related technologies
558
331 - Labor economics
543
900 - History & geography
347
650 - Management & auxiliary services
298
340 - Law
271
381 - Commerce
269
158 - Applied psychology
219
384 - Communications; telecommunication
214
153 - Mental processes & intelligence
187
380 - Commerce, communications & transportation
140
620 - Engineering & allied operations
89
332 - Financial economics
81
700 - The arts; fine & decorative arts
62
100 - Philosophy & psychology
59
576 - Genetics & evolution
59
170 - Ethics
56
001 - Knowledge
52
745 - Decorative arts
46
000 - Computer science, information & general works
43
600 - Technology
43
368 - Insurance
40
333 - Economics of land & energy
39
370 - Education
39
140 - Specific philosophical schools
37
301 - Sociology & anthropology
36
610 - Medicine & health
30
150 - Psychology
27
363 - Other social problems & services
24
200 - Religion
22
659 - Advertising & public relations
21
303 - Social processes
20
304 - Factors affecting social behavior
20
800 - Literature & rhetoric
18
510 - Mathematics
17
006 - Special computer methods
16
005 - Computer programming, programs & data
12
155 - Differential & developmental psychology
11
400 - Language
11
519 - Probabilities & applied mathematics
11
362 - Social welfare problems & services
10
808 - Rhetoric & collections of literature
10
004 - Data processing & computer science
9
more ...