Classification
576 - Genetics & evolution
610 - Medicine & health
333 - Economics of land & energy
4
700 - The arts; fine & decorative arts
4
000 - Computer science, information & general works
3
140 - Specific philosophical schools
3
304 - Factors affecting social behavior
2
330 - Economics
2
370 - Education
2
400 - Language
2
600 - Technology
2
900 - History & geography
2
300 - Social sciences
1
301 - Sociology & anthropology
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
363 - Other social problems & services
1
364 - Criminology
1
380 - Commerce, communications & transportation
1
500 - Natural sciences & mathematics
1
530 - Physics
1
540 - Chemistry & allied sciences
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
612 - Human physiology
1
615 - Pharmacology & therapeutics
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
658 - General management
1