Classification
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537 - Electricity & electronics
2
539 - Modern physics
2
540 - Chemistry & allied sciences
2
550 - Earth sciences
101
551 - Geology, hydrology & meteorology
154
559 - Earth sciences of other areas
1
570 - Life sciences; biology
1
572 - Biochemistry
1
576 - Genetics & evolution
3
577 - Ecology
23
580 - Plants (Botany)
8
581 - Specific topics in natural history
10
600 - Technology
31
610 - Medicine & health
9
613 - Personal health & safety
1
614 - Incidence & prevention of disease
1
620 - Engineering & allied operations
43
621 - Applied physics
100
623 - Military & nautical engineering
1
624 - Civil engineering
33
625 - Engineering of railroads & roads
2
628 - Sanitary & municipal engineering
5
629 - Other branches of engineering
37
630 - Agriculture & related technologies
18
631 - Techniques, equipment & materials
10
634 - Orchards, fruits & forestry
5
641 - Food & drink
1
657 - Accounting
3
658 - General management
12
660 - Chemical engineering
1
670 - Manufacturing
1
681 - Precision instruments & other devices
1
690 - Buildings
3
691 - Building materials
1
700 - The arts; fine & decorative arts
42
710 - Civic & landscape art
1
720 - Architecture
11
741 - Drawing & drawings
1
745 - Decorative arts
3
800 - Literature & rhetoric
4
900 - History & geography
26
910 - Geography & travel
590
915 - Geography of & travel in Asia
1
930 - History of ancient world to ca. 499
4