Classification
300 - Social sciences
330 - Economics
363 - Other social problems & services
600 - Technology
320 - Political science
10
333 - Economics of land & energy
10
380 - Commerce, communications & transportation
5
610 - Medicine & health
5
370 - Education
4
620 - Engineering & allied operations
4
900 - History & geography
4
000 - Computer science, information & general works
3
140 - Specific philosophical schools
3
551 - Geology, hydrology & meteorology
3
581 - Specific topics in natural history
3
700 - The arts; fine & decorative arts
3
200 - Religion
2
340 - Law
2
400 - Language
2
576 - Genetics & evolution
2
100 - Philosophy & psychology
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
350 - Public administration & military science
1
500 - Natural sciences & mathematics
1
650 - Management & auxiliary services
1
657 - Accounting
1
658 - General management
1