Classification
370 - Education
380 - Commerce, communications & transportation
000 - Computer science, information & general works
6
320 - Political science
6
330 - Economics
6
333 - Economics of land & energy
6
363 - Other social problems & services
6
610 - Medicine & health
6
700 - The arts; fine & decorative arts
6
140 - Specific philosophical schools
5
600 - Technology
5
170 - Ethics
2
304 - Factors affecting social behavior
2
414 - Phonology & phonetics
2
551 - Geology, hydrology & meteorology
2
630 - Agriculture & related technologies
2
900 - History & geography
2
100 - Philosophy & psychology
1
340 - Law
1
400 - Language
1
581 - Specific topics in natural history
1
780 - Music
1