Classification
100 - Philosophy & psychology
320 - Political science
363 - Other social problems & services
170 - Ethics
1
200 - Religion
1
300 - Social sciences
1
600 - Technology
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
700 - The arts; fine & decorative arts
1
900 - History & geography
1