Classification
580 - Plants (Botany)
1,614
581 - Specific topics in natural history
395
571 - Physiology & related subjects
318
630 - Agriculture & related technologies
270
572 - Biochemistry
189
616 - Diseases
174
577 - Ecology
115
547 - Organic chemistry
101
500 - Natural sciences & mathematics
99
579 - Microorganisms, fungi & algae
74
660 - Chemical engineering
62
333 - Economics of land & energy
59
570 - Life sciences; biology
48
615 - Pharmacology & therapeutics
44
363 - Other social problems & services
39
551 - Geology, hydrology & meteorology
35
576 - Genetics & evolution
35
631 - Techniques, equipment & materials
29
590 - Animals (Zoology)
28
634 - Orchards, fruits & forestry
28
664 - Food technology
22
000 - Computer science, information & general works
21
610 - Medicine & health
20
641 - Food & drink
18
578 - Natural history of organisms
16
600 - Technology
16
700 - The arts; fine & decorative arts
16
620 - Engineering & allied operations
14
380 - Commerce, communications & transportation
13
414 - Phonology & phonetics
10
540 - Chemistry & allied sciences
10
612 - Human physiology
10
330 - Economics
9
613 - Personal health & safety
8
592 - Invertebrates
5
614 - Incidence & prevention of disease
5
720 - Architecture
5
900 - History & geography
5
560 - Paleontology; paleozoology
4
611 - Human anatomy, cytology & histology
4
617 - Surgery & related medical specialties
4
006 - Special computer methods
3
304 - Factors affecting social behavior
3
519 - Probabilities & applied mathematics
3
530 - Physics
3
550 - Earth sciences
3
599 - Mammals
3
618 - Gynecology, obstetrics, pediatrics & geriatrics
3
930 - History of ancient world to ca. 499
3
140 - Specific philosophical schools
2
more ...