Classification
330 - Economics
243
100 - Philosophy & psychology
192
320 - Political science
93
900 - History & geography
25
340 - Law
24
300 - Social sciences
16
333 - Economics of land & energy
15
336 - Public finance
13
361 - Social problems & social welfare in general
12
363 - Other social problems & services
10
610 - Medicine & health
10
380 - Commerce, communications & transportation
9
170 - Ethics
8
338 - Production
8
140 - Specific philosophical schools
7
500 - Natural sciences & mathematics
7
657 - Accounting
7
200 - Religion
5
700 - The arts; fine & decorative arts
5
000 - Computer science, information & general works
4
304 - Factors affecting social behavior
3
306 - Culture & institutions
3
350 - Public administration & military science
3
551 - Geology, hydrology & meteorology
3
658 - General management
3
301 - Sociology & anthropology
2
339 - Macroeconomics & related topics
2
360 - Social problems & services; associations
2
400 - Language
2
576 - Genetics & evolution
2
120 - Epistemology, causation & humankind
1
174 - Occupational ethics
1
331 - Labor economics
1
332 - Financial economics
1
335 - Socialism & related systems
1
346 - Private law
1
540 - Chemistry & allied sciences
1
600 - Technology
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
650 - Management & auxiliary services
1