Classification
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546 - Inorganic chemistry
13
547 - Organic chemistry
13
548 - Crystallography
5
549 - Mineralogy
4
550 - Earth sciences
10
551 - Geology, hydrology & meteorology
24
570 - Life sciences; biology
1
571 - Physiology & related subjects
5
572 - Biochemistry
7
574 - [Unassigned]
3
576 - Genetics & evolution
25
577 - Ecology
1
578 - Natural history of organisms
1
580 - Plants (Botany)
19
600 - Technology
75
604 - Special topics
1
610 - Medicine & health
19
612 - Human physiology
4
615 - Pharmacology & therapeutics
3
616 - Diseases
2
620 - Engineering & allied operations
396
621 - Applied physics
417
622 - Mining & related operations
2
623 - Military & nautical engineering
1
624 - Civil engineering
5
627 - Hydraulic engineering
1
628 - Sanitary & municipal engineering
9
629 - Other branches of engineering
46
630 - Agriculture & related technologies
2
631 - Techniques, equipment & materials
1
657 - Accounting
1
658 - General management
1
660 - Chemical engineering
60
661 - Industrial chemicals
5
662 - Explosives, fuels & related products
8
664 - Food technology
3
665 - Industrial oils, fats, waxes & gases
1
667 - Cleaning, color & coating technologies
3
668 - Technology of other organic products
8
670 - Manufacturing
12
674 - Lumber processing, wood products & cork
1
690 - Buildings
8
691 - Building materials
3
696 - Utilities
8
697 - Heating, ventilating & air-conditioning
6
700 - The arts; fine & decorative arts
80
720 - Architecture
9
800 - Literature & rhetoric
2
900 - History & geography
35
910 - Geography & travel
1