Classification
170 - Ethics
361 - Social problems & social welfare in general
370 - Education
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
200 - Religion
1
330 - Economics
1
360 - Social problems & services; associations
1
363 - Other social problems & services
1
380 - Commerce, communications & transportation
1
600 - Technology
1
610 - Medicine & health
1