Classification
570 - Life sciences; biology
413
006 - Special computer methods
221
610 - Medicine & health
135
004 - Data processing & computer science
104
572 - Biochemistry
66
571 - Physiology & related subjects
60
616 - Diseases
43
005 - Computer programming, programs & data
36
612 - Human physiology
36
660 - Chemical engineering
34
500 - Natural sciences & mathematics
26
000 - Computer science, information & general works
25
003 - Systems
25
621 - Applied physics
22
576 - Genetics & evolution
20
620 - Engineering & allied operations
20
530 - Physics
19
580 - Plants (Botany)
19
518 - Numerical analysis
17
615 - Pharmacology & therapeutics
17
519 - Probabilities & applied mathematics
16
541 - Physical chemistry
15
333 - Economics of land & energy
14
579 - Microorganisms, fungi & algae
14
515 - Analysis
11
600 - Technology
11
629 - Other branches of engineering
11
700 - The arts; fine & decorative arts
11
577 - Ecology
10
581 - Specific topics in natural history
10
630 - Agriculture & related technologies
10
363 - Other social problems & services
9
025 - Library operations
8
560 - Paleontology; paleozoology
8
380 - Commerce, communications & transportation
7
550 - Earth sciences
6
535 - Light & infrared & ultraviolet phenomena
5
611 - Human anatomy, cytology & histology
5
140 - Specific philosophical schools
4
330 - Economics
4
547 - Organic chemistry
4
599 - Mammals
4
614 - Incidence & prevention of disease
4
720 - Architecture
4
001 - Knowledge
3
300 - Social sciences
3
511 - General principles of mathematics
3
540 - Chemistry & allied sciences
3
542 - Techniques, equipment & materials
3
590 - Animals (Zoology)
3
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