Classification
000 - Computer science, information & general works
140 - Specific philosophical schools
170 - Ethics
330 - Economics
200 - Religion
3
333 - Economics of land & energy
3
100 - Philosophy & psychology
2
300 - Social sciences
2
320 - Political science
2
361 - Social problems & social welfare in general
1
363 - Other social problems & services
1
370 - Education
1
380 - Commerce, communications & transportation
1
551 - Geology, hydrology & meteorology
1
581 - Specific topics in natural history
1
600 - Technology
1
610 - Medicine & health
1
700 - The arts; fine & decorative arts
1
900 - History & geography
1