Classification
579 - Microorganisms, fungi & algae
31
571 - Physiology & related subjects
18
616 - Diseases
16
660 - Chemical engineering
12
577 - Ecology
11
572 - Biochemistry
9
630 - Agriculture & related technologies
9
664 - Food technology
8
580 - Plants (Botany)
7
576 - Genetics & evolution
6
641 - Food & drink
6
612 - Human physiology
5
333 - Economics of land & energy
3
363 - Other social problems & services
3
551 - Geology, hydrology & meteorology
3
570 - Life sciences; biology
3
581 - Specific topics in natural history
3
613 - Personal health & safety
3
001 - Knowledge
2
300 - Social sciences
2
620 - Engineering & allied operations
2
628 - Sanitary & municipal engineering
2
631 - Techniques, equipment & materials
2
000 - Computer science, information & general works
1
003 - Systems
1
006 - Special computer methods
1
304 - Factors affecting social behavior
1
500 - Natural sciences & mathematics
1
509 - Historical, geographic & persons treatment
1
550 - Earth sciences
1
560 - Paleontology; paleozoology
1
596 - Chordates
1
610 - Medicine & health
1
614 - Incidence & prevention of disease
1
615 - Pharmacology & therapeutics
1
617 - Surgery & related medical specialties
1
621 - Applied physics
1
636 - Animal husbandry
1
658 - General management
1
662 - Explosives, fuels & related products
1
663 - Beverage technology
1
670 - Manufacturing
1
700 - The arts; fine & decorative arts
1
910 - Geography & travel
1