Classification
570 - Life sciences; biology
47
615 - Pharmacology & therapeutics
42
610 - Medicine & health
22
000 - Computer science, information & general works
17
540 - Chemistry & allied sciences
16
700 - The arts; fine & decorative arts
14
333 - Economics of land & energy
11
140 - Specific philosophical schools
9
500 - Natural sciences & mathematics
5
576 - Genetics & evolution
5
600 - Technology
5
304 - Factors affecting social behavior
3
571 - Physiology & related subjects
3
380 - Commerce, communications & transportation
2
541 - Physical chemistry
2
580 - Plants (Botany)
2
620 - Engineering & allied operations
2
745 - Decorative arts
2
800 - Literature & rhetoric
2
331 - Labor economics
1
363 - Other social problems & services
1
530 - Physics
1
542 - Techniques, equipment & materials
1
547 - Organic chemistry
1
579 - Microorganisms, fungi & algae
1
612 - Human physiology
1
616 - Diseases
1
660 - Chemical engineering
1
697 - Heating, ventilating & air-conditioning
1