Classification
000 - Computer science, information & general works
2
330 - Economics
2
333 - Economics of land & energy
363 - Other social problems & services
2
380 - Commerce, communications & transportation
610 - Medicine & health
2
658 - General management
140 - Specific philosophical schools
1
551 - Geology, hydrology & meteorology
1
600 - Technology
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
720 - Architecture
1