Classification
610 - Medicine & health
2,494
616 - Diseases
2,270
617 - Surgery & related medical specialties
490
820 - English & Old English literatures
433
006 - Special computer methods
354
618 - Gynecology, obstetrics, pediatrics & geriatrics
197
330 - Economics
146
612 - Human physiology
127
571 - Physiology & related subjects
122
613 - Personal health & safety
118
520 - Astronomy & allied sciences
111
615 - Pharmacology & therapeutics
108
614 - Incidence & prevention of disease
99
320 - Political science
80
700 - The arts; fine & decorative arts
79
340 - Law
73
300 - Social sciences
68
900 - History & geography
64
170 - Ethics
59
620 - Engineering & allied operations
56
640 - Home & family management
54
572 - Biochemistry
48
362 - Social welfare problems & services
44
370 - Education
40
658 - General management
40
540 - Chemistry & allied sciences
38
580 - Plants (Botany)
37
174 - Occupational ethics
36
005 - Computer programming, programs & data
32
360 - Social problems & services; associations
31
150 - Psychology
28
570 - Life sciences; biology
28
630 - Agriculture & related technologies
28
380 - Commerce, communications & transportation
27
001 - Knowledge
26
240 - Christian moral & devotional theology
26
000 - Computer science, information & general works
25
004 - Data processing & computer science
24
010 - Bibliography
23
940 - History of Europe
23
100 - Philosophy & psychology
22
500 - Natural sciences & mathematics
22
304 - Factors affecting social behavior
21
800 - Literature & rhetoric
21
660 - Chemical engineering
20
810 - American literature in English
20
590 - Animals (Zoology)
19
061 - Organizations in North America
17
140 - Specific philosophical schools
17
363 - Other social problems & services
16
more ...