Classification
300 - Social sciences
330 - Economics
865
320 - Political science
766
900 - History & geography
438
576 - Genetics & evolution
235
332 - Financial economics
75
658 - General management
63
500 - Natural sciences & mathematics
48
302 - Social interaction
46
670 - Manufacturing
42
340 - Law
38
338 - Production
34
333 - Economics of land & energy
24
000 - Computer science, information & general works
22
700 - The arts; fine & decorative arts
19
301 - Sociology & anthropology
17
630 - Agriculture & related technologies
17
363 - Other social problems & services
14
100 - Philosophy & psychology
13
380 - Commerce, communications & transportation
12
600 - Technology
9
610 - Medicine & health
9
140 - Specific philosophical schools
8
368 - Insurance
8
200 - Religion
7
350 - Public administration & military science
6
620 - Engineering & allied operations
6
657 - Accounting
6
336 - Public finance
5
800 - Literature & rhetoric
5
370 - Education
4
001 - Knowledge
3
170 - Ethics
3
331 - Labor economics
3
361 - Social problems & social welfare in general
3
384 - Communications; telecommunication
3
400 - Language
3
551 - Geology, hydrology & meteorology
3
581 - Specific topics in natural history
3
005 - Computer programming, programs & data
2
158 - Applied psychology
2
381 - Commerce
2
410 - Linguistics
2
510 - Mathematics
2
120 - Epistemology, causation & humankind
1
153 - Mental processes & intelligence
1
160 - Logic
1
297 - Islam, Babism & Bahai Faith
1
304 - Factors affecting social behavior
1
337 - International economics
1
more ...