Classification
200 - Religion
300 - Social sciences
610 - Medicine & health
301 - Sociology & anthropology
4
320 - Political science
4
100 - Philosophy & psychology
3
330 - Economics
3
333 - Economics of land & energy
3
140 - Specific philosophical schools
2
340 - Law
2
363 - Other social problems & services
2
900 - History & geography
2
000 - Computer science, information & general works
1
170 - Ethics
1
297 - Islam, Babism & Bahai Faith
1
361 - Social problems & social welfare in general
1
370 - Education
1
380 - Commerce, communications & transportation
1
581 - Specific topics in natural history
1
600 - Technology
1
620 - Engineering & allied operations
1
700 - The arts; fine & decorative arts
1
720 - Architecture
1
800 - Literature & rhetoric
1