Classification
330 - Economics
363 - Other social problems & services
380 - Commerce, communications & transportation
610 - Medicine & health
658 - General management
140 - Specific philosophical schools
2
333 - Economics of land & energy
2
551 - Geology, hydrology & meteorology
2
600 - Technology
2
630 - Agriculture & related technologies
2
000 - Computer science, information & general works
1
370 - Education
1
580 - Plants (Botany)
1
615 - Pharmacology & therapeutics
1
620 - Engineering & allied operations
1
700 - The arts; fine & decorative arts
1