Classification
500 - Natural sciences & mathematics
600 - Technology
73
610 - Medicine & health
14
615 - Pharmacology & therapeutics
10
700 - The arts; fine & decorative arts
9
100 - Philosophy & psychology
5
576 - Genetics & evolution
5
612 - Human physiology
4
658 - General management
4
519 - Probabilities & applied mathematics
3
580 - Plants (Botany)
3
620 - Engineering & allied operations
3
330 - Economics
2
331 - Labor economics
2
333 - Economics of land & energy
2
363 - Other social problems & services
2
380 - Commerce, communications & transportation
2
530 - Physics
2
616 - Diseases
2
780 - Music
2
000 - Computer science, information & general works
1
005 - Computer programming, programs & data
1
006 - Special computer methods
1
152 - Perception, movement, emotions & drives
1
153 - Mental processes & intelligence
1
300 - Social sciences
1
301 - Sociology & anthropology
1
302 - Social interaction
1
304 - Factors affecting social behavior
1
339 - Macroeconomics & related topics
1
372 - Elementary education
1
510 - Mathematics
1
539 - Modern physics
1
581 - Specific topics in natural history
1
611 - Human anatomy, cytology & histology
1
630 - Agriculture & related technologies
1
660 - Chemical engineering
1
670 - Manufacturing
1