Classification
200 - Religion
300 - Social sciences
320 - Political science
340 - Law
900 - History & geography
100 - Philosophy & psychology
2
330 - Economics
2
370 - Education
2
000 - Computer science, information & general works
1
120 - Epistemology, causation & humankind
1
170 - Ethics
1
304 - Factors affecting social behavior
1
363 - Other social problems & services
1
380 - Commerce, communications & transportation
1
400 - Language
1
410 - Linguistics
1
600 - Technology
1
620 - Engineering & allied operations
1