Classification
610 - Medicine & health
304 - Factors affecting social behavior
1,877
330 - Economics
1,667
700 - The arts; fine & decorative arts
1,454
333 - Economics of land & energy
958
600 - Technology
825
000 - Computer science, information & general works
786
363 - Other social problems & services
732
140 - Specific philosophical schools
713
580 - Plants (Botany)
597
320 - Political science
584
370 - Education
538
380 - Commerce, communications & transportation
521
900 - History & geography
509
620 - Engineering & allied operations
476
100 - Philosophy & psychology
358
612 - Human physiology
283
500 - Natural sciences & mathematics
279
540 - Chemistry & allied sciences
243
576 - Genetics & evolution
198
306 - Culture & institutions
189
615 - Pharmacology & therapeutics
182
630 - Agriculture & related technologies
181
300 - Social sciences
179
170 - Ethics
157
340 - Law
138
551 - Geology, hydrology & meteorology
126
658 - General management
111
581 - Specific topics in natural history
107
361 - Social problems & social welfare in general
93
800 - Literature & rhetoric
87
301 - Sociology & anthropology
79
200 - Religion
66
414 - Phonology & phonetics
66
400 - Language
59
362 - Social welfare problems & services
53
720 - Architecture
52
616 - Diseases
46
530 - Physics
41
780 - Music
25
410 - Linguistics
23
336 - Public finance
20
374 - Adult education
19
519 - Probabilities & applied mathematics
14
791 - Public performances
14
590 - Animals (Zoology)
13
360 - Social problems & services; associations
12
384 - Communications; telecommunication
12
338 - Production
11
614 - Incidence & prevention of disease
11
more ...