Classification
330 - Economics
320 - Political science
3,667
658 - General management
2,120
300 - Social sciences
1,842
670 - Manufacturing
1,628
500 - Natural sciences & mathematics
1,503
302 - Social interaction
1,483
600 - Technology
702
333 - Economics of land & energy
691
338 - Production
582
700 - The arts; fine & decorative arts
548
340 - Law
469
380 - Commerce, communications & transportation
402
363 - Other social problems & services
401
900 - History & geography
390
620 - Engineering & allied operations
389
381 - Commerce
315
331 - Labor economics
313
000 - Computer science, information & general works
286
630 - Agriculture & related technologies
234
650 - Management & auxiliary services
217
610 - Medicine & health
202
384 - Communications; telecommunication
186
158 - Applied psychology
172
332 - Financial economics
140
304 - Factors affecting social behavior
128
153 - Mental processes & intelligence
116
370 - Education
112
140 - Specific philosophical schools
99
580 - Plants (Botany)
73
576 - Genetics & evolution
71
551 - Geology, hydrology & meteorology
62
150 - Psychology
58
001 - Knowledge
54
745 - Decorative arts
53
336 - Public finance
52
800 - Literature & rhetoric
52
170 - Ethics
47
368 - Insurance
47
720 - Architecture
44
581 - Specific topics in natural history
42
540 - Chemistry & allied sciences
40
100 - Philosophy & psychology
32
006 - Special computer methods
30
657 - Accounting
27
301 - Sociology & anthropology
24
400 - Language
23
005 - Computer programming, programs & data
22
780 - Music
21
659 - Advertising & public relations
19
more ...