Classification
320 - Political science
363 - Other social problems & services
370 - Education
380 - Commerce, communications & transportation
600 - Technology
330 - Economics
6
333 - Economics of land & energy
6
700 - The arts; fine & decorative arts
6
551 - Geology, hydrology & meteorology
4
610 - Medicine & health
4
720 - Architecture
4
900 - History & geography
4
000 - Computer science, information & general works
3
140 - Specific philosophical schools
2
304 - Factors affecting social behavior
2
200 - Religion
1
300 - Social sciences
1
414 - Phonology & phonetics
1
580 - Plants (Botany)
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
658 - General management
1