Classification
500 - Natural sciences & mathematics
000 - Computer science, information & general works
9
700 - The arts; fine & decorative arts
8
333 - Economics of land & energy
6
330 - Economics
4
140 - Specific philosophical schools
3
380 - Commerce, communications & transportation
3
576 - Genetics & evolution
3
600 - Technology
3
610 - Medicine & health
3
620 - Engineering & allied operations
3
340 - Law
2
530 - Physics
2
900 - History & geography
2
100 - Philosophy & psychology
1
120 - Epistemology, causation & humankind
1
170 - Ethics
1
363 - Other social problems & services
1
400 - Language
1
410 - Linguistics
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1