Classification
140 - Specific philosophical schools
610 - Medicine & health
102
330 - Economics
38
700 - The arts; fine & decorative arts
29
170 - Ethics
21
340 - Law
8
612 - Human physiology
6
600 - Technology
5
100 - Philosophy & psychology
4
361 - Social problems & social welfare in general
4
363 - Other social problems & services
4
380 - Commerce, communications & transportation
4
580 - Plants (Botany)
4
333 - Economics of land & energy
3
900 - History & geography
3
800 - Literature & rhetoric
2
000 - Computer science, information & general works
1
174 - Occupational ethics
1
300 - Social sciences
1
320 - Political science
1
338 - Production
1
344 - Labor, social, education & cultural law
1
370 - Education
1
540 - Chemistry & allied sciences
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
613 - Personal health & safety
1
614 - Incidence & prevention of disease
1
625 - Engineering of railroads & roads
1
629 - Other branches of engineering
1
658 - General management
1