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