Classification
620 - Engineering & allied operations
91
571 - Physiology & related subjects
88
616 - Diseases
86
530 - Physics
31
572 - Biochemistry
31
612 - Human physiology
27
610 - Medicine & health
23
617 - Surgery & related medical specialties
19
001 - Knowledge
18
300 - Social sciences
18
600 - Technology
17
611 - Human anatomy, cytology & histology
15
580 - Plants (Botany)
14
621 - Applied physics
12
700 - The arts; fine & decorative arts
12
333 - Economics of land & energy
11
543 - Analytical chemistry
11
570 - Life sciences; biology
10
548 - Crystallography
9
900 - History & geography
8
541 - Physical chemistry
7
577 - Ecology
7
579 - Microorganisms, fungi & algae
7
590 - Animals (Zoology)
7
615 - Pharmacology & therapeutics
7
000 - Computer science, information & general works
6
006 - Special computer methods
6
363 - Other social problems & services
6
502 - Miscellany
6
549 - Mineralogy
6
576 - Genetics & evolution
6
618 - Gynecology, obstetrics, pediatrics & geriatrics
6
500 - Natural sciences & mathematics
5
380 - Commerce, communications & transportation
4
537 - Electricity & electronics
4
581 - Specific topics in natural history
4
004 - Data processing & computer science
3
540 - Chemistry & allied sciences
3
550 - Earth sciences
3
551 - Geology, hydrology & meteorology
3
629 - Other branches of engineering
3
634 - Orchards, fruits & forestry
3
340 - Law
2
414 - Phonology & phonetics
2
539 - Modern physics
2
546 - Inorganic chemistry
2
641 - Food & drink
2
660 - Chemical engineering
2
664 - Food technology
2
140 - Specific philosophical schools
1
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