Classification
900 - History & geography
610 - Medicine & health
10
700 - The arts; fine & decorative arts
9
600 - Technology
7
620 - Engineering & allied operations
6
320 - Political science
4
333 - Economics of land & energy
4
363 - Other social problems & services
4
330 - Economics
3
000 - Computer science, information & general works
2
140 - Specific philosophical schools
2
380 - Commerce, communications & transportation
2
400 - Language
2
100 - Philosophy & psychology
1
300 - Social sciences
1
304 - Factors affecting social behavior
1
370 - Education
1
414 - Phonology & phonetics
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
612 - Human physiology
1
770 - Photography, photographs & computer art
1
800 - Literature & rhetoric
1