Classification
297 - Islam, Babism & Bahai Faith
800 - Literature & rhetoric
900 - History & geography
4
320 - Political science
3
000 - Computer science, information & general works
2
100 - Philosophy & psychology
2
200 - Religion
2
500 - Natural sciences & mathematics
2
610 - Medicine & health
2
700 - The arts; fine & decorative arts
2
140 - Specific philosophical schools
1
300 - Social sciences
1
330 - Economics
1
333 - Economics of land & energy
1
363 - Other social problems & services
1
380 - Commerce, communications & transportation
1
400 - Language
1
551 - Geology, hydrology & meteorology
1
581 - Specific topics in natural history
1
600 - Technology
1