Classification
547 - Organic chemistry
1,009
541 - Physical chemistry
187
620 - Engineering & allied operations
159
540 - Chemistry & allied sciences
148
546 - Inorganic chemistry
91
572 - Biochemistry
80
543 - Analytical chemistry
73
664 - Food technology
72
641 - Food & drink
63
660 - Chemical engineering
62
615 - Pharmacology & therapeutics
47
580 - Plants (Botany)
23
000 - Computer science, information & general works
21
530 - Physics
18
571 - Physiology & related subjects
18
333 - Economics of land & energy
15
551 - Geology, hydrology & meteorology
12
610 - Medicine & health
12
621 - Applied physics
12
577 - Ecology
10
700 - The arts; fine & decorative arts
9
363 - Other social problems & services
8
500 - Natural sciences & mathematics
8
306 - Culture & institutions
6
576 - Genetics & evolution
6
600 - Technology
6
670 - Manufacturing
6
520 - Astronomy & allied sciences
4
579 - Microorganisms, fungi & algae
4
630 - Agriculture & related technologies
4
631 - Techniques, equipment & materials
4
371 - Schools & their activities; special education
3
379 - Public policy issues in education
3
548 - Crystallography
3
612 - Human physiology
3
628 - Sanitary & municipal engineering
3
668 - Technology of other organic products
3
140 - Specific philosophical schools
2
414 - Phonology & phonetics
2
539 - Modern physics
2
542 - Techniques, equipment & materials
2
581 - Specific topics in natural history
2
616 - Diseases
2
720 - Architecture
2
003 - Systems
1
070 - News media, journalism & publishing
1
100 - Philosophy & psychology
1
302 - Social interaction
1
304 - Factors affecting social behavior
1
305 - Social groups
1
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