Classification
320 - Political science
363 - Other social problems & services
380 - Commerce, communications & transportation
581 - Specific topics in natural history
700 - The arts; fine & decorative arts
900 - History & geography
000 - Computer science, information & general works
3
140 - Specific philosophical schools
3
330 - Economics
3
333 - Economics of land & energy
3
600 - Technology
2
200 - Religion
1
300 - Social sciences
1
301 - Sociology & anthropology
1
361 - Social problems & social welfare in general
1
370 - Education
1
414 - Phonology & phonetics
1
551 - Geology, hydrology & meteorology
1
620 - Engineering & allied operations
1