Classification
200 - Religion
300 - Social sciences
320 - Political science
340 - Law
370 - Education
900 - History & geography
000 - Computer science, information & general works
1
100 - Philosophy & psychology
1
120 - Epistemology, causation & humankind
1
170 - Ethics
1
330 - Economics
1
363 - Other social problems & services
1
380 - Commerce, communications & transportation
1
600 - Technology
1
620 - Engineering & allied operations
1