Classification
363 - Other social problems & services
500 - Natural sciences & mathematics
576 - Genetics & evolution
620 - Engineering & allied operations
9
700 - The arts; fine & decorative arts
140 - Specific philosophical schools
6
380 - Commerce, communications & transportation
6
600 - Technology
5
900 - History & geography
5
000 - Computer science, information & general works
4
333 - Economics of land & energy
4
300 - Social sciences
3
320 - Political science
3
340 - Law
3
414 - Phonology & phonetics
3
540 - Chemistry & allied sciences
3
551 - Geology, hydrology & meteorology
3
580 - Plants (Botany)
3
581 - Specific topics in natural history
3
610 - Medicine & health
3
612 - Human physiology
3
720 - Architecture
3
330 - Economics
1