Classification
000 - Computer science, information & general works
330 - Economics
340 - Law
333 - Economics of land & energy
4
500 - Natural sciences & mathematics
3
530 - Physics
3
700 - The arts; fine & decorative arts
3
380 - Commerce, communications & transportation
2
320 - Political science
1
363 - Other social problems & services
1
414 - Phonology & phonetics
1
540 - Chemistry & allied sciences
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
600 - Technology
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
658 - General management
1
900 - History & geography
1