Classification
370 - Education
330 - Economics
1,215
320 - Political science
1,055
610 - Medicine & health
621
100 - Philosophy & psychology
495
333 - Economics of land & energy
479
700 - The arts; fine & decorative arts
471
600 - Technology
431
900 - History & geography
421
300 - Social sciences
335
304 - Factors affecting social behavior
310
140 - Specific philosophical schools
236
400 - Language
236
363 - Other social problems & services
213
380 - Commerce, communications & transportation
212
000 - Computer science, information & general works
188
500 - Natural sciences & mathematics
167
200 - Religion
162
340 - Law
126
620 - Engineering & allied operations
112
800 - Literature & rhetoric
77
530 - Physics
75
410 - Linguistics
74
170 - Ethics
73
780 - Music
64
301 - Sociology & anthropology
59
576 - Genetics & evolution
59
551 - Geology, hydrology & meteorology
46
630 - Agriculture & related technologies
46
658 - General management
39
720 - Architecture
38
297 - Islam, Babism & Bahai Faith
31
580 - Plants (Botany)
29
540 - Chemistry & allied sciences
27
361 - Social problems & social welfare in general
26
581 - Specific topics in natural history
25
160 - Logic
17
120 - Epistemology, causation & humankind
16
414 - Phonology & phonetics
15
770 - Photography, photographs & computer art
12
791 - Public performances
12
336 - Public finance
11
612 - Human physiology
10
296 - Judaism
9
350 - Public administration & military science
8
360 - Social problems & services; associations
8
371 - Schools & their activities; special education
8
657 - Accounting
8
153 - Mental processes & intelligence
6
615 - Pharmacology & therapeutics
5
more ...