Classification
650 - Management & auxiliary services
8,050
658 - General management
3,474
330 - Economics
2,481
300 - Social sciences
1,545
302 - Social interaction
1,472
500 - Natural sciences & mathematics
1,440
670 - Manufacturing
1,418
338 - Production
591
331 - Labor economics
291
381 - Commerce
291
158 - Applied psychology
207
333 - Economics of land & energy
152
384 - Communications; telecommunication
149
620 - Engineering & allied operations
149
332 - Financial economics
147
005 - Computer programming, programs & data
141
380 - Commerce, communications & transportation
128
320 - Political science
121
657 - Accounting
119
153 - Mental processes & intelligence
117
006 - Special computer methods
73
000 - Computer science, information & general works
68
150 - Psychology
64
004 - Data processing & computer science
63
363 - Other social problems & services
56
170 - Ethics
53
340 - Law
53
600 - Technology
52
343 - Military, tax, trade & industrial law
51
700 - The arts; fine & decorative arts
51
001 - Knowledge
49
900 - History & geography
49
610 - Medicine & health
48
745 - Decorative arts
42
519 - Probabilities & applied mathematics
39
100 - Philosophy & psychology
38
301 - Sociology & anthropology
38
336 - Public finance
37
510 - Mathematics
35
304 - Factors affecting social behavior
34
346 - Private law
32
368 - Insurance
31
337 - International economics
30
140 - Specific philosophical schools
28
174 - Occupational ethics
28
303 - Social processes
28
306 - Culture & institutions
28
339 - Macroeconomics & related topics
27
630 - Agriculture & related technologies
27
003 - Systems
25
more ...