Classification
900 - History & geography
610 - Medicine & health
87
100 - Philosophy & psychology
8
300 - Social sciences
8
200 - Religion
7
140 - Specific philosophical schools
5
320 - Political science
5
361 - Social problems & social welfare in general
4
170 - Ethics
3
330 - Economics
3
340 - Law
3
581 - Specific topics in natural history
3
700 - The arts; fine & decorative arts
3
363 - Other social problems & services
2
370 - Education
2
580 - Plants (Botany)
2
600 - Technology
2
791 - Public performances
2
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
333 - Economics of land & energy
1
362 - Social welfare problems & services
1
380 - Commerce, communications & transportation
1
540 - Chemistry & allied sciences
1
576 - Genetics & evolution
1
612 - Human physiology
1
770 - Photography, photographs & computer art
1