Classification
616 - Diseases
5,117
571 - Physiology & related subjects
4,055
610 - Medicine & health
3,625
570 - Life sciences; biology
2,218
572 - Biochemistry
2,109
612 - Human physiology
1,491
620 - Engineering & allied operations
1,396
580 - Plants (Botany)
1,355
333 - Economics of land & energy
1,282
000 - Computer science, information & general works
1,199
577 - Ecology
1,160
615 - Pharmacology & therapeutics
1,139
006 - Special computer methods
1,097
576 - Genetics & evolution
1,003
600 - Technology
985
700 - The arts; fine & decorative arts
877
579 - Microorganisms, fungi & algae
856
363 - Other social problems & services
839
540 - Chemistry & allied sciences
794
660 - Chemical engineering
723
500 - Natural sciences & mathematics
692
630 - Agriculture & related technologies
655
004 - Data processing & computer science
552
530 - Physics
538
551 - Geology, hydrology & meteorology
532
621 - Applied physics
512
617 - Surgery & related medical specialties
482
519 - Probabilities & applied mathematics
480
581 - Specific topics in natural history
478
330 - Economics
420
140 - Specific philosophical schools
401
611 - Human anatomy, cytology & histology
386
300 - Social sciences
385
547 - Organic chemistry
385
541 - Physical chemistry
368
005 - Computer programming, programs & data
343
590 - Animals (Zoology)
330
614 - Incidence & prevention of disease
330
515 - Analysis
321
900 - History & geography
304
001 - Knowledge
277
003 - Systems
259
380 - Commerce, communications & transportation
256
543 - Analytical chemistry
255
599 - Mammals
227
304 - Factors affecting social behavior
213
613 - Personal health & safety
206
910 - Geography & travel
186
618 - Gynecology, obstetrics, pediatrics & geriatrics
178
664 - Food technology
175
more ...