Classification
100 - Philosophy & psychology
1
170 - Ethics
1
200 - Religion
1
300 - Social sciences
1
320 - Political science
330 - Economics
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
370 - Education
380 - Commerce, communications & transportation
1
610 - Medicine & health
1
658 - General management
1
780 - Music
1
900 - History & geography
1