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