Classification
330 - Economics
936
320 - Political science
208
340 - Law
188
339 - Macroeconomics & related topics
99
332 - Financial economics
85
333 - Economics of land & energy
60
000 - Computer science, information & general works
47
610 - Medicine & health
45
700 - The arts; fine & decorative arts
38
380 - Commerce, communications & transportation
36
363 - Other social problems & services
31
331 - Labor economics
30
600 - Technology
29
900 - History & geography
29
658 - General management
26
343 - Military, tax, trade & industrial law
25
370 - Education
23
140 - Specific philosophical schools
21
336 - Public finance
20
338 - Production
16
304 - Factors affecting social behavior
14
551 - Geology, hydrology & meteorology
14
630 - Agriculture & related technologies
14
620 - Engineering & allied operations
13
368 - Insurance
12
300 - Social sciences
11
361 - Social problems & social welfare in general
10
305 - Social groups
9
362 - Social welfare problems & services
8
500 - Natural sciences & mathematics
8
576 - Genetics & evolution
8
580 - Plants (Botany)
8
100 - Philosophy & psychology
6
306 - Culture & institutions
5
400 - Language
5
581 - Specific topics in natural history
5
657 - Accounting
5
800 - Literature & rhetoric
5
158 - Applied psychology
4
360 - Social problems & services; associations
4
170 - Ethics
3
200 - Religion
3
410 - Linguistics
3
612 - Human physiology
3
770 - Photography, photographs & computer art
3
780 - Music
3
344 - Labor, social, education & cultural law
2
381 - Commerce
2
510 - Mathematics
2
520 - Astronomy & allied sciences
2
more ...