Classification
320 - Political science
330 - Economics
581 - Specific topics in natural history
620 - Engineering & allied operations
333 - Economics of land & energy
6
600 - Technology
6
363 - Other social problems & services
5
700 - The arts; fine & decorative arts
4
000 - Computer science, information & general works
3
170 - Ethics
3
140 - Specific philosophical schools
2
380 - Commerce, communications & transportation
2
551 - Geology, hydrology & meteorology
2
610 - Medicine & health
2
900 - History & geography
2
100 - Philosophy & psychology
1
200 - Religion
1
370 - Education
1
414 - Phonology & phonetics
1
530 - Physics
1
540 - Chemistry & allied sciences
1
580 - Plants (Botany)
1
630 - Agriculture & related technologies
1