Classification
320 - Political science
330 - Economics
333 - Economics of land & energy
2
380 - Commerce, communications & transportation
551 - Geology, hydrology & meteorology
600 - Technology
2
620 - Engineering & allied operations
900 - History & geography
000 - Computer science, information & general works
1
340 - Law
1
580 - Plants (Botany)
1
610 - Medicine & health
1
700 - The arts; fine & decorative arts
1