Classification
500 - Natural sciences & mathematics
700 - The arts; fine & decorative arts
17
000 - Computer science, information & general works
15
610 - Medicine & health
14
600 - Technology
9
615 - Pharmacology & therapeutics
9
380 - Commerce, communications & transportation
7
363 - Other social problems & services
6
576 - Genetics & evolution
6
620 - Engineering & allied operations
6
140 - Specific philosophical schools
5
333 - Economics of land & energy
5
330 - Economics
4
612 - Human physiology
4
540 - Chemistry & allied sciences
3
580 - Plants (Botany)
3
900 - History & geography
3
300 - Social sciences
1
304 - Factors affecting social behavior
1
361 - Social problems & social welfare in general
1
370 - Education
1
400 - Language
1
530 - Physics
1
630 - Agriculture & related technologies
1
658 - General management
1
720 - Architecture
1