Classification
330 - Economics
22,877
610 - Medicine & health
1,288
320 - Political science
1,212
500 - Natural sciences & mathematics
1,108
820 - English & Old English literatures
710
333 - Economics of land & energy
585
340 - Law
540
658 - General management
507
620 - Engineering & allied operations
445
700 - The arts; fine & decorative arts
442
900 - History & geography
401
000 - Computer science, information & general works
365
100 - Philosophy & psychology
358
070 - News media, journalism & publishing
338
600 - Technology
327
576 - Genetics & evolution
322
612 - Human physiology
302
616 - Diseases
301
005 - Computer programming, programs & data
296
580 - Plants (Botany)
289
300 - Social sciences
257
380 - Commerce, communications & transportation
252
363 - Other social problems & services
250
551 - Geology, hydrology & meteorology
241
302 - Social interaction
210
581 - Specific topics in natural history
206
004 - Data processing & computer science
188
006 - Special computer methods
187
519 - Probabilities & applied mathematics
169
370 - Education
158
304 - Factors affecting social behavior
157
140 - Specific philosophical schools
145
615 - Pharmacology & therapeutics
145
621 - Applied physics
139
910 - Geography & travel
132
306 - Culture & institutions
127
338 - Production
127
280 - Christian denominations & sects
107
530 - Physics
106
800 - Literature & rhetoric
105
331 - Labor economics
101
520 - Astronomy & allied sciences
99
540 - Chemistry & allied sciences
94
400 - Language
92
617 - Surgery & related medical specialties
90
332 - Financial economics
87
571 - Physiology & related subjects
85
541 - Physical chemistry
77
650 - Management & auxiliary services
76
510 - Mathematics
74
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