Classification
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535 - Light & infrared & ultraviolet phenomena
36
800 - Literature & rhetoric
36
100 - Philosophy & psychology
33
338 - Production
31
532 - Fluid mechanics; liquid mechanics
31
550 - Earth sciences
31
628 - Sanitary & municipal engineering
31
668 - Technology of other organic products
31
581 - Specific topics in natural history
30
571 - Physiology & related subjects
29
005 - Computer programming, programs & data
27
523 - Specific celestial bodies & phenomena
25
539 - Modern physics
25
627 - Hydraulic engineering
24
667 - Cleaning, color & coating technologies
21
741 - Drawing & drawings
21
570 - Life sciences; biology
20
300 - Social sciences
19
516 - Geometry
19
537 - Electricity & electronics
18
546 - Inorganic chemistry
17
574 - [Unassigned]
17
400 - Language
16
062 - Organizations in British Isles; in England
14
321 - Systems of governments & states
13
781 - General principles & musical forms
13
632 - Plant injuries, diseases & pests
12
604 - Special topics
11
650 - Management & auxiliary services
11
511 - General principles of mathematics
10
616 - Diseases
10
664 - Food technology
10
910 - Geography & travel
10
512 - Algebra
9
572 - Biochemistry
9
697 - Heating, ventilating & air-conditioning
9
770 - Photography, photographs & computer art
9
170 - Ethics
8
303 - Social processes
8
543 - Analytical chemistry
8
693 - Specific materials & purposes
8
780 - Music
8
120 - Epistemology, causation & humankind
7
509 - Historical, geographic & persons treatment
7
514 - Topology
7
526 - Mathematical geography
7
533 - Gas mechanics
7
301 - Sociology & anthropology
6
361 - Social problems & social welfare in general
6
501 - Philosophy & theory
6
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