Classification
576 - Genetics & evolution
900 - History & geography
330 - Economics
17
320 - Political science
16
700 - The arts; fine & decorative arts
9
600 - Technology
7
620 - Engineering & allied operations
6
580 - Plants (Botany)
3
000 - Computer science, information & general works
2
100 - Philosophy & psychology
2
301 - Sociology & anthropology
2
363 - Other social problems & services
2
370 - Education
2
400 - Language
2
500 - Natural sciences & mathematics
2
530 - Physics
2
800 - Literature & rhetoric
2
140 - Specific philosophical schools
1
200 - Religion
1
300 - Social sciences
1
304 - Factors affecting social behavior
1
333 - Economics of land & energy
1
540 - Chemistry & allied sciences
1
610 - Medicine & health
1
658 - General management
1
770 - Photography, photographs & computer art
1
780 - Music
1
920 - Biography, genealogy & insignia
1