Classification
620 - Engineering & allied operations
700 - The arts; fine & decorative arts
7
600 - Technology
6
333 - Economics of land & energy
5
900 - History & geography
5
000 - Computer science, information & general works
3
363 - Other social problems & services
2
370 - Education
2
380 - Commerce, communications & transportation
2
780 - Music
2
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
304 - Factors affecting social behavior
1
320 - Political science
1
330 - Economics
1
540 - Chemistry & allied sciences
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
720 - Architecture
1