Classification
576 - Genetics & evolution
610 - Medicine & health
600 - Technology
7
700 - The arts; fine & decorative arts
6
000 - Computer science, information & general works
5
333 - Economics of land & energy
5
380 - Commerce, communications & transportation
5
658 - General management
5
330 - Economics
4
363 - Other social problems & services
4
320 - Political science
3
140 - Specific philosophical schools
2
370 - Education
2
620 - Engineering & allied operations
2
630 - Agriculture & related technologies
2
900 - History & geography
2
304 - Factors affecting social behavior
1
400 - Language
1
410 - Linguistics
1
500 - Natural sciences & mathematics
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
615 - Pharmacology & therapeutics
1