Classification
572 - Biochemistry
165
616 - Diseases
161
571 - Physiology & related subjects
154
612 - Human physiology
71
610 - Medicine & health
62
570 - Life sciences; biology
60
615 - Pharmacology & therapeutics
56
620 - Engineering & allied operations
46
579 - Microorganisms, fungi & algae
33
005 - Computer programming, programs & data
31
006 - Special computer methods
29
580 - Plants (Botany)
27
333 - Economics of land & energy
24
530 - Physics
24
000 - Computer science, information & general works
23
617 - Surgery & related medical specialties
21
577 - Ecology
20
540 - Chemistry & allied sciences
17
641 - Food & drink
16
660 - Chemical engineering
16
664 - Food technology
16
576 - Genetics & evolution
15
500 - Natural sciences & mathematics
14
539 - Modern physics
14
581 - Specific topics in natural history
14
621 - Applied physics
14
700 - The arts; fine & decorative arts
14
300 - Social sciences
12
001 - Knowledge
11
541 - Physical chemistry
10
590 - Animals (Zoology)
10
600 - Technology
10
380 - Commerce, communications & transportation
9
547 - Organic chemistry
9
611 - Human anatomy, cytology & histology
9
658 - General management
8
304 - Factors affecting social behavior
7
330 - Economics
7
363 - Other social problems & services
7
515 - Analysis
7
320 - Political science
6
630 - Agriculture & related technologies
6
900 - History & geography
6
331 - Labor economics
5
414 - Phonology & phonetics
5
004 - Data processing & computer science
4
140 - Specific philosophical schools
4
531 - Classical mechanics; solid mechanics
4
543 - Analytical chemistry
4
550 - Earth sciences
4
more ...