Classification
300 - Social sciences
330 - Economics
600 - Technology
610 - Medicine & health
320 - Political science
6
363 - Other social problems & services
5
333 - Economics of land & energy
4
900 - History & geography
4
000 - Computer science, information & general works
3
100 - Philosophy & psychology
3
370 - Education
3
140 - Specific philosophical schools
2
301 - Sociology & anthropology
2
581 - Specific topics in natural history
2
620 - Engineering & allied operations
2
170 - Ethics
1
200 - Religion
1
340 - Law
1
350 - Public administration & military science
1
380 - Commerce, communications & transportation
1
400 - Language
1
530 - Physics
1
576 - Genetics & evolution
1
700 - The arts; fine & decorative arts
1
780 - Music
1