Classification
140 - Specific philosophical schools
170 - Ethics
200 - Religion
600 - Technology
330 - Economics
2
363 - Other social problems & services
2
610 - Medicine & health
2
700 - The arts; fine & decorative arts
2
000 - Computer science, information & general works
1
301 - Sociology & anthropology
1
320 - Political science
1
333 - Economics of land & energy
1
361 - Social problems & social welfare in general
1
370 - Education
1
380 - Commerce, communications & transportation
1
581 - Specific topics in natural history
1
620 - Engineering & allied operations
1