Classification
330 - Economics
370 - Education
610 - Medicine & health
5
140 - Specific philosophical schools
4
333 - Economics of land & energy
4
380 - Commerce, communications & transportation
4
700 - The arts; fine & decorative arts
4
363 - Other social problems & services
3
600 - Technology
3
000 - Computer science, information & general works
2
200 - Religion
2
620 - Engineering & allied operations
2
900 - History & geography
2
100 - Philosophy & psychology
1
170 - Ethics
1
304 - Factors affecting social behavior
1
320 - Political science
1
340 - Law
1
361 - Social problems & social welfare in general
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
630 - Agriculture & related technologies
1
658 - General management
1
720 - Architecture
1