Classification
330 - Economics
340 - Law
380 - Commerce, communications & transportation
600 - Technology
3
620 - Engineering & allied operations
3
900 - History & geography
333 - Economics of land & energy
2
580 - Plants (Botany)
2
320 - Political science
1
500 - Natural sciences & mathematics
1
551 - Geology, hydrology & meteorology
1