Classification
330 - Economics
585
320 - Political science
355
610 - Medicine & health
192
820 - English & Old English literatures
166
340 - Law
157
333 - Economics of land & energy
122
616 - Diseases
115
300 - Social sciences
114
304 - Factors affecting social behavior
83
338 - Production
77
620 - Engineering & allied operations
73
658 - General management
68
577 - Ecology
60
621 - Applied physics
52
306 - Culture & institutions
51
363 - Other social problems & services
49
370 - Education
47
630 - Agriculture & related technologies
47
551 - Geology, hydrology & meteorology
45
900 - History & geography
45
005 - Computer programming, programs & data
41
006 - Special computer methods
41
331 - Labor economics
35
301 - Sociology & anthropology
32
613 - Personal health & safety
32
910 - Geography & travel
31
004 - Data processing & computer science
28
380 - Commerce, communications & transportation
28
530 - Physics
28
500 - Natural sciences & mathematics
27
600 - Technology
26
617 - Surgery & related medical specialties
26
614 - Incidence & prevention of disease
23
650 - Management & auxiliary services
23
660 - Chemical engineering
23
332 - Financial economics
22
664 - Food technology
22
327 - International relations
21
341 - Law of nations
21
519 - Probabilities & applied mathematics
21
170 - Ethics
20
510 - Mathematics
20
520 - Astronomy & allied sciences
20
615 - Pharmacology & therapeutics
19
250 - Christian orders & local church
18
541 - Physical chemistry
17
571 - Physiology & related subjects
17
580 - Plants (Botany)
17
302 - Social interaction
16
576 - Genetics & evolution
15
more ...