Classification
170 - Ethics
900 - History & geography
320 - Political science
4
200 - Religion
3
300 - Social sciences
3
330 - Economics
3
100 - Philosophy & psychology
2
140 - Specific philosophical schools
2
333 - Economics of land & energy
2
551 - Geology, hydrology & meteorology
2
610 - Medicine & health
2
700 - The arts; fine & decorative arts
2
800 - Literature & rhetoric
2
000 - Computer science, information & general works
1
160 - Logic
1
179 - Other ethical norms
1
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
340 - Law
1
361 - Social problems & social welfare in general
1
363 - Other social problems & services
1
520 - Astronomy & allied sciences
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
600 - Technology
1
620 - Engineering & allied operations
1
720 - Architecture
1
780 - Music
1