Classification
380 - Commerce, communications & transportation
600 - Technology
700 - The arts; fine & decorative arts
4
000 - Computer science, information & general works
3
140 - Specific philosophical schools
3
320 - Political science
3
363 - Other social problems & services
3
200 - Religion
2
361 - Social problems & social welfare in general
2
581 - Specific topics in natural history
2
610 - Medicine & health
2
900 - History & geography
2
301 - Sociology & anthropology
1
340 - Law
1
620 - Engineering & allied operations
1