Classification
338 - Production
913
330 - Economics
884
658 - General management
255
333 - Economics of land & energy
228
304 - Factors affecting social behavior
155
320 - Political science
154
306 - Culture & institutions
85
332 - Financial economics
84
363 - Other social problems & services
75
327 - International relations
68
331 - Labor economics
68
300 - Social sciences
57
339 - Macroeconomics & related topics
52
337 - International economics
43
620 - Engineering & allied operations
38
305 - Social groups
36
302 - Social interaction
34
610 - Medicine & health
32
301 - Sociology & anthropology
31
303 - Social processes
30
500 - Natural sciences & mathematics
27
307 - Communities
26
900 - History & geography
26
621 - Applied physics
25
361 - Social problems & social welfare in general
24
370 - Education
24
381 - Commerce
21
600 - Technology
21
630 - Agriculture & related technologies
19
341 - Law of nations
17
629 - Other branches of engineering
16
670 - Manufacturing
16
140 - Specific philosophical schools
15
170 - Ethics
14
340 - Law
14
382 - International commerce
14
650 - Management & auxiliary services
14
380 - Commerce, communications & transportation
13
343 - Military, tax, trade & industrial law
12
362 - Social welfare problems & services
12
000 - Computer science, information & general works
11
006 - Special computer methods
11
153 - Mental processes & intelligence
10
551 - Geology, hydrology & meteorology
10
576 - Genetics & evolution
10
700 - The arts; fine & decorative arts
10
910 - Geography & travel
10
001 - Knowledge
8
100 - Philosophy & psychology
8
200 - Religion
8
more ...