Classification
200 - Religion
320 - Political science
330 - Economics
340 - Law
300 - Social sciences
2
301 - Sociology & anthropology
2
333 - Economics of land & energy
2
363 - Other social problems & services
2
380 - Commerce, communications & transportation
2
600 - Technology
2
610 - Medicine & health
2
900 - History & geography
2
000 - Computer science, information & general works
1
370 - Education
1
400 - Language
1
410 - Linguistics
1
581 - Specific topics in natural history
1
700 - The arts; fine & decorative arts
1