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