Classification
610 - Medicine & health
700 - The arts; fine & decorative arts
21
600 - Technology
18
000 - Computer science, information & general works
15
333 - Economics of land & energy
15
140 - Specific philosophical schools
13
330 - Economics
12
380 - Commerce, communications & transportation
11
363 - Other social problems & services
7
370 - Education
7
580 - Plants (Botany)
7
320 - Political science
6
551 - Geology, hydrology & meteorology
6
620 - Engineering & allied operations
6
658 - General management
5
900 - History & geography
5
170 - Ethics
3
612 - Human physiology
3
720 - Architecture
3
500 - Natural sciences & mathematics
2
540 - Chemistry & allied sciences
2
576 - Genetics & evolution
2
615 - Pharmacology & therapeutics
2
630 - Agriculture & related technologies
2
100 - Philosophy & psychology
1
120 - Epistemology, causation & humankind
1
304 - Factors affecting social behavior
1
306 - Culture & institutions
1
360 - Social problems & services; associations
1
400 - Language
1
530 - Physics
1
581 - Specific topics in natural history
1
800 - Literature & rhetoric
1