Classification
333 - Economics of land & energy
700 - The arts; fine & decorative arts
900 - History & geography
320 - Political science
3
000 - Computer science, information & general works
2
330 - Economics
2
370 - Education
2
581 - Specific topics in natural history
2
600 - Technology
2
620 - Engineering & allied operations
2
100 - Philosophy & psychology
1
170 - Ethics
1
200 - Religion
1
300 - Social sciences
1
340 - Law
1
363 - Other social problems & services
1
380 - Commerce, communications & transportation
1
530 - Physics
1
576 - Genetics & evolution
1
610 - Medicine & health
1