Classification
000 - Computer science, information & general works
1
320 - Political science
1
330 - Economics
2
333 - Economics of land & energy
3
340 - Law
2
363 - Other social problems & services
2
380 - Commerce, communications & transportation
400 - Language
1
500 - Natural sciences & mathematics
1
551 - Geology, hydrology & meteorology
2
580 - Plants (Botany)
600 - Technology
610 - Medicine & health
1
612 - Human physiology
1
620 - Engineering & allied operations
3
630 - Agriculture & related technologies
1
700 - The arts; fine & decorative arts
2
900 - History & geography
3