Classification
610 - Medicine & health
87
370 - Education
9
170 - Ethics
8
330 - Economics
6
362 - Social welfare problems & services
6
363 - Other social problems & services
5
600 - Technology
4
100 - Philosophy & psychology
3
320 - Political science
3
361 - Social problems & social welfare in general
3
380 - Commerce, communications & transportation
3
140 - Specific philosophical schools
2
551 - Geology, hydrology & meteorology
2
616 - Diseases
2
620 - Engineering & allied operations
2
900 - History & geography
2
000 - Computer science, information & general works
1
001 - Knowledge
1
155 - Differential & developmental psychology
1
174 - Occupational ethics
1
304 - Factors affecting social behavior
1
305 - Social groups
1
331 - Labor economics
1
353 - Specific fields of public administration
1
500 - Natural sciences & mathematics
1
574 - [Unassigned]
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
612 - Human physiology
1
615 - Pharmacology & therapeutics
1
700 - The arts; fine & decorative arts
1