Classification
000 - Computer science, information & general works
4
100 - Philosophy & psychology
2
140 - Specific philosophical schools
3
304 - Factors affecting social behavior
3
320 - Political science
8
330 - Economics
9
333 - Economics of land & energy
5
340 - Law
1
361 - Social problems & social welfare in general
1
363 - Other social problems & services
370 - Education
3
380 - Commerce, communications & transportation
1
500 - Natural sciences & mathematics
1
540 - Chemistry & allied sciences
2
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
3
581 - Specific topics in natural history
1
600 - Technology
3
610 - Medicine & health
6
615 - Pharmacology & therapeutics
1
620 - Engineering & allied operations
1
700 - The arts; fine & decorative arts
5
900 - History & geography
2