Classification
616 - Diseases
397
320 - Political science
227
300 - Social sciences
175
333 - Economics of land & energy
152
330 - Economics
147
621 - Applied physics
147
577 - Ecology
134
338 - Production
127
620 - Engineering & allied operations
124
551 - Geology, hydrology & meteorology
118
005 - Computer programming, programs & data
104
004 - Data processing & computer science
98
658 - General management
95
610 - Medicine & health
88
530 - Physics
82
301 - Sociology & anthropology
78
327 - International relations
75
571 - Physiology & related subjects
74
650 - Management & auxiliary services
70
337 - International economics
69
006 - Special computer methods
68
900 - History & geography
68
001 - Knowledge
66
340 - Law
65
519 - Probabilities & applied mathematics
63
617 - Surgery & related medical specialties
62
520 - Astronomy & allied sciences
61
613 - Personal health & safety
60
614 - Incidence & prevention of disease
60
500 - Natural sciences & mathematics
58
572 - Biochemistry
55
539 - Modern physics
52
541 - Physical chemistry
52
363 - Other social problems & services
51
615 - Pharmacology & therapeutics
47
370 - Education
46
003 - Systems
43
612 - Human physiology
43
050 - General serial publications
41
580 - Plants (Botany)
40
550 - Earth sciences
39
339 - Macroeconomics & related topics
38
150 - Psychology
37
306 - Culture & institutions
36
304 - Factors affecting social behavior
35
570 - Life sciences; biology
32
332 - Financial economics
31
512 - Algebra
29
910 - Geography & travel
29
371 - Schools & their activities; special education
28
more ...