Classification
300 - Social sciences
320 - Political science
330 - Economics
363 - Other social problems & services
380 - Commerce, communications & transportation
600 - Technology
4
333 - Economics of land & energy
2
551 - Geology, hydrology & meteorology
2
700 - The arts; fine & decorative arts
2
900 - History & geography
2
000 - Computer science, information & general works
1
200 - Religion
1
304 - Factors affecting social behavior
1
370 - Education
1
581 - Specific topics in natural history
1
650 - Management & auxiliary services
1
657 - Accounting
1