Classification
100 - Philosophy & psychology
612 - Human physiology
610 - Medicine & health
12
140 - Specific philosophical schools
5
333 - Economics of land & energy
5
700 - The arts; fine & decorative arts
5
363 - Other social problems & services
4
500 - Natural sciences & mathematics
4
900 - History & geography
4
000 - Computer science, information & general works
3
330 - Economics
3
380 - Commerce, communications & transportation
3
370 - Education
2
170 - Ethics
1
361 - Social problems & social welfare in general
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
600 - Technology
1
615 - Pharmacology & therapeutics
1
616 - Diseases
1
780 - Music
1
800 - Literature & rhetoric
1