Classification
000 - Computer science, information & general works
2
330 - Economics
333 - Economics of land & energy
2
363 - Other social problems & services
2
630 - Agriculture & related technologies
140 - Specific philosophical schools
1
320 - Political science
1
340 - Law
1
361 - Social problems & social welfare in general
1
380 - Commerce, communications & transportation
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
600 - Technology
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
658 - General management
1