Classification
000 - Computer science, information & general works
4
333 - Economics of land & energy
380 - Commerce, communications & transportation
700 - The arts; fine & decorative arts
4
551 - Geology, hydrology & meteorology
3
620 - Engineering & allied operations
3
500 - Natural sciences & mathematics
2
800 - Literature & rhetoric
2
900 - History & geography
2
100 - Philosophy & psychology
1
120 - Epistemology, causation & humankind
1
330 - Economics
1
363 - Other social problems & services
1
414 - Phonology & phonetics
1
530 - Physics
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
600 - Technology
1
720 - Architecture
1