Classification
100 - Philosophy & psychology
13
400 - Language
7
000 - Computer science, information & general works
4
333 - Economics of land & energy
4
370 - Education
3
140 - Specific philosophical schools
2
363 - Other social problems & services
2
410 - Linguistics
2
500 - Natural sciences & mathematics
2
576 - Genetics & evolution
2
581 - Specific topics in natural history
2
600 - Technology
2
610 - Medicine & health
2
700 - The arts; fine & decorative arts
2
300 - Social sciences
1
301 - Sociology & anthropology
1
530 - Physics
1