Classification
500 - Natural sciences & mathematics
581 - Specific topics in natural history
620 - Engineering & allied operations
600 - Technology
13
580 - Plants (Botany)
11
363 - Other social problems & services
9
630 - Agriculture & related technologies
9
300 - Social sciences
5
333 - Economics of land & energy
5
551 - Geology, hydrology & meteorology
5
610 - Medicine & health
5
000 - Computer science, information & general works
4
140 - Specific philosophical schools
4
540 - Chemistry & allied sciences
4
576 - Genetics & evolution
4
700 - The arts; fine & decorative arts
4
380 - Commerce, communications & transportation
3
414 - Phonology & phonetics
3
612 - Human physiology
3
120 - Epistemology, causation & humankind
1
370 - Education
1
530 - Physics
1
900 - History & geography
1