Classification
140 - Specific philosophical schools
363 - Other social problems & services
6
610 - Medicine & health
6
700 - The arts; fine & decorative arts
6
551 - Geology, hydrology & meteorology
5
000 - Computer science, information & general works
4
330 - Economics
4
333 - Economics of land & energy
4
900 - History & geography
4
380 - Commerce, communications & transportation
3
100 - Philosophy & psychology
2
170 - Ethics
1
200 - Religion
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
320 - Political science
1
370 - Education
1
400 - Language
1
410 - Linguistics
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
600 - Technology
1
620 - Engineering & allied operations
1
800 - Literature & rhetoric
1