Classification
333 - Economics of land & energy
610 - Medicine & health
27
700 - The arts; fine & decorative arts
14
140 - Specific philosophical schools
10
380 - Commerce, communications & transportation
6
612 - Human physiology
5
000 - Computer science, information & general works
4
580 - Plants (Botany)
3
581 - Specific topics in natural history
3
304 - Factors affecting social behavior
2
330 - Economics
2
370 - Education
2
100 - Philosophy & psychology
1
320 - Political science
1
340 - Law
1
363 - Other social problems & services
1
540 - Chemistry & allied sciences
1
615 - Pharmacology & therapeutics
1
658 - General management
1
770 - Photography, photographs & computer art
1
800 - Literature & rhetoric
1