Classification
900 - History & geography
3
000 - Computer science, information & general works
2
140 - Specific philosophical schools
2
200 - Religion
2
320 - Political science
2
363 - Other social problems & services
2
720 - Architecture
2
100 - Philosophy & psychology
1
297 - Islam, Babism & Bahai Faith
1
300 - Social sciences
1
330 - Economics
1
333 - Economics of land & energy
1
380 - Commerce, communications & transportation
1
550 - Earth sciences
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
610 - Medicine & health
1
700 - The arts; fine & decorative arts
1