Classification
664 - Food technology
592
641 - Food & drink
509
630 - Agriculture & related technologies
96
540 - Chemistry & allied sciences
58
572 - Biochemistry
57
660 - Chemical engineering
56
613 - Personal health & safety
45
579 - Microorganisms, fungi & algae
43
620 - Engineering & allied operations
37
543 - Analytical chemistry
35
570 - Life sciences; biology
34
577 - Ecology
32
580 - Plants (Botany)
30
571 - Physiology & related subjects
28
616 - Diseases
27
304 - Factors affecting social behavior
24
610 - Medicine & health
24
338 - Production
21
547 - Organic chemistry
21
615 - Pharmacology & therapeutics
21
333 - Economics of land & energy
16
541 - Physical chemistry
16
546 - Inorganic chemistry
15
363 - Other social problems & services
11
530 - Physics
9
551 - Geology, hydrology & meteorology
9
621 - Applied physics
9
631 - Techniques, equipment & materials
9
306 - Culture & institutions
8
612 - Human physiology
8
628 - Sanitary & municipal engineering
8
636 - Animal husbandry
8
614 - Incidence & prevention of disease
6
670 - Manufacturing
6
305 - Social groups
5
500 - Natural sciences & mathematics
5
658 - General management
5
170 - Ethics
4
343 - Military, tax, trade & industrial law
4
330 - Economics
3
006 - Special computer methods
2
174 - Occupational ethics
2
509 - Historical, geographic & persons treatment
2
510 - Mathematics
2
515 - Analysis
2
520 - Astronomy & allied sciences
2
590 - Animals (Zoology)
2
592 - Invertebrates
2
910 - Geography & travel
2
004 - Data processing & computer science
1
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