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