Classification
610 - Medicine & health
304 - Factors affecting social behavior
2,591
330 - Economics
2,030
700 - The arts; fine & decorative arts
1,442
333 - Economics of land & energy
1,065
600 - Technology
876
320 - Political science
839
000 - Computer science, information & general works
794
363 - Other social problems & services
766
140 - Specific philosophical schools
743
370 - Education
621
900 - History & geography
585
380 - Commerce, communications & transportation
543
580 - Plants (Botany)
530
620 - Engineering & allied operations
461
340 - Law
409
100 - Philosophy & psychology
393
500 - Natural sciences & mathematics
279
612 - Human physiology
278
300 - Social sciences
265
540 - Chemistry & allied sciences
225
306 - Culture & institutions
219
576 - Genetics & evolution
199
615 - Pharmacology & therapeutics
183
630 - Agriculture & related technologies
183
170 - Ethics
174
361 - Social problems & social welfare in general
134
551 - Geology, hydrology & meteorology
123
658 - General management
114
581 - Specific topics in natural history
100
800 - Literature & rhetoric
95
301 - Sociology & anthropology
91
200 - Religion
82
414 - Phonology & phonetics
67
400 - Language
61
362 - Social welfare problems & services
58
616 - Diseases
51
720 - Architecture
51
530 - Physics
41
336 - Public finance
33
174 - Occupational ethics
31
618 - Gynecology, obstetrics, pediatrics & geriatrics
29
410 - Linguistics
28
780 - Music
25
374 - Adult education
19
360 - Social problems & services; associations
18
791 - Public performances
16
350 - Public administration & military science
13
519 - Probabilities & applied mathematics
13
384 - Communications; telecommunication
12
more ...