Classification
540 - Chemistry & allied sciences
558
541 - Physical chemistry
245
547 - Organic chemistry
202
620 - Engineering & allied operations
166
615 - Pharmacology & therapeutics
97
572 - Biochemistry
95
543 - Analytical chemistry
69
530 - Physics
66
660 - Chemical engineering
58
610 - Medicine & health
56
621 - Applied physics
53
616 - Diseases
51
571 - Physiology & related subjects
46
546 - Inorganic chemistry
45
363 - Other social problems & services
35
577 - Ecology
31
664 - Food technology
28
500 - Natural sciences & mathematics
25
580 - Plants (Botany)
24
641 - Food & drink
24
600 - Technology
22
612 - Human physiology
22
700 - The arts; fine & decorative arts
21
000 - Computer science, information & general works
20
333 - Economics of land & energy
20
050 - General serial publications
17
551 - Geology, hydrology & meteorology
17
330 - Economics
16
900 - History & geography
16
001 - Knowledge
15
519 - Probabilities & applied mathematics
15
300 - Social sciences
14
570 - Life sciences; biology
14
515 - Analysis
11
539 - Modern physics
11
006 - Special computer methods
10
542 - Techniques, equipment & materials
10
320 - Political science
9
535 - Light & infrared & ultraviolet phenomena
9
536 - Heat
9
548 - Crystallography
9
549 - Mineralogy
9
579 - Microorganisms, fungi & algae
9
630 - Agriculture & related technologies
9
520 - Astronomy & allied sciences
8
537 - Electricity & electronics
8
628 - Sanitary & municipal engineering
7
380 - Commerce, communications & transportation
5
501 - Philosophy & theory
5
509 - Historical, geographic & persons treatment
5
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