Classification
000 - Computer science, information & general works
140 - Specific philosophical schools
170 - Ethics
200 - Religion
1
330 - Economics
1
361 - Social problems & social welfare in general
1
370 - Education
2
380 - Commerce, communications & transportation
600 - Technology
1
610 - Medicine & health
658 - General management
1
900 - History & geography
1