Classification
540 - Chemistry & allied sciences
559
541 - Physical chemistry
244
547 - Organic chemistry
202
620 - Engineering & allied operations
172
615 - Pharmacology & therapeutics
99
572 - Biochemistry
95
543 - Analytical chemistry
71
530 - Physics
65
610 - Medicine & health
60
660 - Chemical engineering
59
621 - Applied physics
54
571 - Physiology & related subjects
52
616 - Diseases
50
546 - Inorganic chemistry
45
001 - Knowledge
44
300 - Social sciences
43
363 - Other social problems & services
36
577 - Ecology
32
664 - Food technology
29
500 - Natural sciences & mathematics
27
600 - Technology
24
641 - Food & drink
24
580 - Plants (Botany)
23
612 - Human physiology
22
333 - Economics of land & energy
21
700 - The arts; fine & decorative arts
20
000 - Computer science, information & general works
19
551 - Geology, hydrology & meteorology
17
330 - Economics
16
519 - Probabilities & applied mathematics
15
900 - History & geography
15
570 - Life sciences; biology
13
542 - Techniques, equipment & materials
12
515 - Analysis
11
539 - Modern physics
11
630 - Agriculture & related technologies
11
006 - Special computer methods
10
549 - Mineralogy
10
536 - Heat
9
548 - Crystallography
9
579 - Microorganisms, fungi & algae
9
320 - Political science
8
501 - Philosophy & theory
8
520 - Astronomy & allied sciences
8
535 - Light & infrared & ultraviolet phenomena
8
537 - Electricity & electronics
8
576 - Genetics & evolution
7
628 - Sanitary & municipal engineering
7
380 - Commerce, communications & transportation
5
509 - Historical, geographic & persons treatment
5
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