Classification
610 - Medicine & health
304 - Factors affecting social behavior
10
330 - Economics
7
320 - Political science
6
370 - Education
6
300 - Social sciences
5
900 - History & geography
5
333 - Economics of land & energy
4
700 - The arts; fine & decorative arts
4
140 - Specific philosophical schools
3
363 - Other social problems & services
3
540 - Chemistry & allied sciences
3
600 - Technology
3
306 - Culture & institutions
2
340 - Law
2
301 - Sociology & anthropology
1
380 - Commerce, communications & transportation
1
400 - Language
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
612 - Human physiology
1
615 - Pharmacology & therapeutics
1
620 - Engineering & allied operations
1
800 - Literature & rhetoric
1