Classification
170 - Ethics
610 - Medicine & health
8
140 - Specific philosophical schools
7
600 - Technology
7
000 - Computer science, information & general works
6
100 - Philosophy & psychology
6
320 - Political science
5
363 - Other social problems & services
4
500 - Natural sciences & mathematics
4
620 - Engineering & allied operations
4
300 - Social sciences
3
330 - Economics
3
370 - Education
3
580 - Plants (Botany)
3
700 - The arts; fine & decorative arts
3
120 - Epistemology, causation & humankind
2
200 - Religion
2
340 - Law
2
361 - Social problems & social welfare in general
2
380 - Commerce, communications & transportation
2
581 - Specific topics in natural history
2
630 - Agriculture & related technologies
2
800 - Literature & rhetoric
2
174 - Occupational ethics
1
301 - Sociology & anthropology
1
530 - Physics
1
540 - Chemistry & allied sciences
1
576 - Genetics & evolution
1
660 - Chemical engineering
1
900 - History & geography
1
920 - Biography, genealogy & insignia
1