Classification
320 - Political science
330 - Economics
363 - Other social problems & services
370 - Education
900 - History & geography
333 - Economics of land & energy
7
600 - Technology
6
700 - The arts; fine & decorative arts
6
380 - Commerce, communications & transportation
5
551 - Geology, hydrology & meteorology
4
000 - Computer science, information & general works
3
610 - Medicine & health
3
620 - Engineering & allied operations
3
720 - Architecture
3
140 - Specific philosophical schools
1
200 - Religion
1
300 - Social sciences
1
304 - Factors affecting social behavior
1
414 - Phonology & phonetics
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
658 - General management
1