Classification
330 - Economics
584
320 - Political science
354
610 - Medicine & health
172
820 - English & Old English literatures
166
340 - Law
156
333 - Economics of land & energy
114
616 - Diseases
109
300 - Social sciences
97
338 - Production
91
658 - General management
72
620 - Engineering & allied operations
71
304 - Factors affecting social behavior
65
577 - Ecology
60
621 - Applied physics
52
363 - Other social problems & services
50
900 - History & geography
50
370 - Education
48
551 - Geology, hydrology & meteorology
47
306 - Culture & institutions
46
630 - Agriculture & related technologies
43
005 - Computer programming, programs & data
41
006 - Special computer methods
38
331 - Labor economics
35
004 - Data processing & computer science
29
301 - Sociology & anthropology
29
380 - Commerce, communications & transportation
29
519 - Probabilities & applied mathematics
27
613 - Personal health & safety
27
614 - Incidence & prevention of disease
26
530 - Physics
25
600 - Technology
24
617 - Surgery & related medical specialties
24
910 - Geography & travel
24
332 - Financial economics
23
650 - Management & auxiliary services
23
500 - Natural sciences & mathematics
22
541 - Physical chemistry
22
660 - Chemical engineering
22
664 - Food technology
22
520 - Astronomy & allied sciences
21
170 - Ethics
20
341 - Law of nations
20
327 - International relations
19
572 - Biochemistry
19
615 - Pharmacology & therapeutics
19
250 - Christian orders & local church
18
510 - Mathematics
18
302 - Social interaction
16
580 - Plants (Botany)
16
612 - Human physiology
16
more ...