Classification
006 - Special computer methods
616
570 - Life sciences; biology
535
610 - Medicine & health
221
616 - Diseases
217
572 - Biochemistry
193
571 - Physiology & related subjects
187
040 - [Unassigned]
180
005 - Computer programming, programs & data
154
004 - Data processing & computer science
82
660 - Chemical engineering
82
579 - Microorganisms, fungi & algae
78
580 - Plants (Botany)
73
612 - Human physiology
59
621 - Applied physics
57
003 - Systems
54
519 - Probabilities & applied mathematics
52
620 - Engineering & allied operations
51
615 - Pharmacology & therapeutics
49
518 - Numerical analysis
48
581 - Specific topics in natural history
38
576 - Genetics & evolution
33
630 - Agriculture & related technologies
33
631 - Techniques, equipment & materials
28
611 - Human anatomy, cytology & histology
26
530 - Physics
24
541 - Physical chemistry
24
599 - Mammals
22
057 - Serials in Slavic languages
16
614 - Incidence & prevention of disease
16
025 - Library operations
15
577 - Ecology
15
515 - Analysis
11
547 - Organic chemistry
11
629 - Other branches of engineering
11
333 - Economics of land & energy
9
560 - Paleontology; paleozoology
8
535 - Light & infrared & ultraviolet phenomena
7
670 - Manufacturing
7
511 - General principles of mathematics
6
664 - Food technology
6
030 - General encyclopedic works
5
542 - Techniques, equipment & materials
5
613 - Personal health & safety
5
658 - General management
5
001 - Knowledge
4
363 - Other social problems & services
4
543 - Analytical chemistry
4
628 - Sanitary & municipal engineering
4
636 - Animal husbandry
4
300 - Social sciences
3
more ...