Classification
000 - Computer science, information & general works
300 - Social sciences
581 - Specific topics in natural history
6
700 - The arts; fine & decorative arts
6
333 - Economics of land & energy
5
363 - Other social problems & services
5
580 - Plants (Botany)
5
320 - Political science
4
380 - Commerce, communications & transportation
4
500 - Natural sciences & mathematics
4
576 - Genetics & evolution
4
620 - Engineering & allied operations
4
140 - Specific philosophical schools
3
414 - Phonology & phonetics
3
540 - Chemistry & allied sciences
3
551 - Geology, hydrology & meteorology
3
600 - Technology
3
610 - Medicine & health
3
612 - Human physiology
3
900 - History & geography
2
100 - Philosophy & psychology
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
330 - Economics
1
400 - Language
1
630 - Agriculture & related technologies
1
720 - Architecture
1