Classification
320 - Political science
600 - Technology
11
700 - The arts; fine & decorative arts
11
330 - Economics
8
333 - Economics of land & energy
8
610 - Medicine & health
8
000 - Computer science, information & general works
7
363 - Other social problems & services
7
380 - Commerce, communications & transportation
6
551 - Geology, hydrology & meteorology
5
620 - Engineering & allied operations
5
900 - History & geography
5
140 - Specific philosophical schools
3
370 - Education
3
540 - Chemistry & allied sciences
3
630 - Agriculture & related technologies
3
361 - Social problems & social welfare in general
2
550 - Earth sciences
2
581 - Specific topics in natural history
2
100 - Philosophy & psychology
1
170 - Ethics
1
304 - Factors affecting social behavior
1
340 - Law
1
400 - Language
1
530 - Physics
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
615 - Pharmacology & therapeutics
1
658 - General management
1