Classification
571 - Physiology & related subjects
2,790
610 - Medicine & health
2,058
616 - Diseases
1,661
570 - Life sciences; biology
1,349
000 - Computer science, information & general works
1,016
333 - Economics of land & energy
829
576 - Genetics & evolution
742
572 - Biochemistry
728
580 - Plants (Botany)
623
577 - Ecology
584
612 - Human physiology
575
700 - The arts; fine & decorative arts
547
620 - Engineering & allied operations
420
615 - Pharmacology & therapeutics
373
600 - Technology
352
363 - Other social problems & services
348
630 - Agriculture & related technologies
313
006 - Special computer methods
291
140 - Specific philosophical schools
251
581 - Specific topics in natural history
244
660 - Chemical engineering
240
579 - Microorganisms, fungi & algae
229
500 - Natural sciences & mathematics
219
540 - Chemistry & allied sciences
215
551 - Geology, hydrology & meteorology
215
380 - Commerce, communications & transportation
178
330 - Economics
170
590 - Animals (Zoology)
161
004 - Data processing & computer science
147
611 - Human anatomy, cytology & histology
140
900 - History & geography
125
519 - Probabilities & applied mathematics
121
304 - Factors affecting social behavior
109
530 - Physics
102
910 - Geography & travel
95
614 - Incidence & prevention of disease
93
599 - Mammals
83
003 - Systems
81
591 - Specific topics in natural history
80
592 - Invertebrates
75
414 - Phonology & phonetics
72
005 - Computer programming, programs & data
68
550 - Earth sciences
68
515 - Analysis
66
617 - Surgery & related medical specialties
65
543 - Analytical chemistry
64
547 - Organic chemistry
62
634 - Orchards, fruits & forestry
61
621 - Applied physics
60
658 - General management
58
more ...