Classification
140 - Specific philosophical schools
2
300 - Social sciences
610 - Medicine & health
700 - The arts; fine & decorative arts
100 - Philosophy & psychology
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
330 - Economics
1
333 - Economics of land & energy
1
363 - Other social problems & services
1
370 - Education
1
380 - Commerce, communications & transportation
1
400 - Language
1
551 - Geology, hydrology & meteorology
1
900 - History & geography
1