Classification
000 - Computer science, information & general works
301 - Sociology & anthropology
7
700 - The arts; fine & decorative arts
363 - Other social problems & services
4
380 - Commerce, communications & transportation
4
320 - Political science
3
900 - History & geography
3
140 - Specific philosophical schools
2
300 - Social sciences
2
330 - Economics
2
600 - Technology
2
100 - Philosophy & psychology
1
120 - Epistemology, causation & humankind
1
200 - Religion
1
333 - Economics of land & energy
1
340 - Law
1
361 - Social problems & social welfare in general
1
370 - Education
1
581 - Specific topics in natural history
1
630 - Agriculture & related technologies
1