Classification
200 - Religion
581 - Specific topics in natural history
900 - History & geography
170 - Ethics
2
300 - Social sciences
2
301 - Sociology & anthropology
2
320 - Political science
2
000 - Computer science, information & general works
1
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
361 - Social problems & social welfare in general
1
363 - Other social problems & services
1
380 - Commerce, communications & transportation
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
600 - Technology
1
700 - The arts; fine & decorative arts
1