Classification
543 - Analytical chemistry
569
541 - Physical chemistry
128
620 - Engineering & allied operations
126
540 - Chemistry & allied sciences
88
577 - Ecology
88
572 - Biochemistry
73
660 - Chemical engineering
63
547 - Organic chemistry
51
664 - Food technology
47
641 - Food & drink
46
363 - Other social problems & services
44
621 - Applied physics
31
000 - Computer science, information & general works
29
615 - Pharmacology & therapeutics
28
546 - Inorganic chemistry
26
571 - Physiology & related subjects
24
551 - Geology, hydrology & meteorology
22
610 - Medicine & health
20
333 - Economics of land & energy
19
600 - Technology
17
700 - The arts; fine & decorative arts
15
616 - Diseases
13
530 - Physics
12
570 - Life sciences; biology
10
580 - Plants (Botany)
10
900 - History & geography
10
140 - Specific philosophical schools
9
502 - Miscellany
7
670 - Manufacturing
6
500 - Natural sciences & mathematics
5
549 - Mineralogy
5
628 - Sanitary & municipal engineering
5
539 - Modern physics
4
630 - Agriculture & related technologies
4
631 - Techniques, equipment & materials
4
634 - Orchards, fruits & forestry
4
301 - Sociology & anthropology
3
330 - Economics
3
612 - Human physiology
3
370 - Education
2
410 - Linguistics
2
519 - Probabilities & applied mathematics
2
520 - Astronomy & allied sciences
2
537 - Electricity & electronics
2
613 - Personal health & safety
2
614 - Incidence & prevention of disease
2
800 - Literature & rhetoric
2
910 - Geography & travel
2
005 - Computer programming, programs & data
1
006 - Special computer methods
1
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