Classification
320 - Political science
330 - Economics
2
333 - Economics of land & energy
340 - Law
380 - Commerce, communications & transportation
600 - Technology
000 - Computer science, information & general works
1
363 - Other social problems & services
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
620 - Engineering & allied operations
1
900 - History & geography
1