Classification
000 - Computer science, information & general works
4
320 - Political science
330 - Economics
333 - Economics of land & energy
4
610 - Medicine & health
4
700 - The arts; fine & decorative arts
363 - Other social problems & services
3
140 - Specific philosophical schools
2
620 - Engineering & allied operations
2
304 - Factors affecting social behavior
1
361 - Social problems & social welfare in general
1
370 - Education
1
380 - Commerce, communications & transportation
1
530 - Physics
1
550 - Earth sciences
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
600 - Technology
1