Classification
330 - Economics
1,182
658 - General management
87
338 - Production
73
320 - Political science
67
616 - Diseases
62
332 - Financial economics
59
610 - Medicine & health
59
304 - Factors affecting social behavior
41
617 - Surgery & related medical specialties
36
339 - Macroeconomics & related topics
34
300 - Social sciences
31
331 - Labor economics
29
333 - Economics of land & energy
26
820 - English & Old English literatures
26
380 - Commerce, communications & transportation
25
370 - Education
20
302 - Social interaction
19
000 - Computer science, information & general works
18
500 - Natural sciences & mathematics
18
570 - Life sciences; biology
18
363 - Other social problems & services
17
306 - Culture & institutions
16
700 - The arts; fine & decorative arts
15
600 - Technology
14
620 - Engineering & allied operations
14
006 - Special computer methods
12
551 - Geology, hydrology & meteorology
12
571 - Physiology & related subjects
12
650 - Management & auxiliary services
12
900 - History & geography
12
003 - Systems
11
340 - Law
11
381 - Commerce
11
337 - International economics
10
158 - Applied psychology
9
305 - Social groups
9
580 - Plants (Botany)
9
001 - Knowledge
8
621 - Applied physics
8
670 - Manufacturing
8
301 - Sociology & anthropology
7
611 - Human anatomy, cytology & histology
7
362 - Social welfare problems & services
6
140 - Specific philosophical schools
5
150 - Psychology
5
336 - Public finance
5
612 - Human physiology
5
910 - Geography & travel
5
940 - History of Europe
5
303 - Social processes
4
more ...