Classification
320 - Political science
361 - Social problems & social welfare in general
600 - Technology
700 - The arts; fine & decorative arts
000 - Computer science, information & general works
4
140 - Specific philosophical schools
4
200 - Religion
3
363 - Other social problems & services
3
170 - Ethics
2
301 - Sociology & anthropology
2
330 - Economics
2
340 - Law
2
380 - Commerce, communications & transportation
2
581 - Specific topics in natural history
2
620 - Engineering & allied operations
2
900 - History & geography
2
100 - Philosophy & psychology
1
300 - Social sciences
1
333 - Economics of land & energy
1
360 - Social problems & services; associations
1
364 - Criminology
1
610 - Medicine & health
1