Classification
900 - History & geography
2,090
320 - Political science
1,210
300 - Social sciences
928
700 - The arts; fine & decorative arts
729
330 - Economics
622
100 - Philosophy & psychology
534
800 - Literature & rhetoric
482
370 - Education
454
340 - Law
411
200 - Religion
399
140 - Specific philosophical schools
356
400 - Language
353
410 - Linguistics
326
301 - Sociology & anthropology
314
333 - Economics of land & energy
294
600 - Technology
283
380 - Commerce, communications & transportation
251
363 - Other social problems & services
236
610 - Medicine & health
201
000 - Computer science, information & general works
160
304 - Factors affecting social behavior
154
620 - Engineering & allied operations
150
170 - Ethics
126
720 - Architecture
123
780 - Music
119
297 - Islam, Babism & Bahai Faith
101
630 - Agriculture & related technologies
93
581 - Specific topics in natural history
83
500 - Natural sciences & mathematics
77
551 - Geology, hydrology & meteorology
72
576 - Genetics & evolution
69
361 - Social problems & social welfare in general
65
350 - Public administration & military science
58
296 - Judaism
56
530 - Physics
51
414 - Phonology & phonetics
50
360 - Social problems & services; associations
40
364 - Criminology
40
120 - Epistemology, causation & humankind
30
770 - Photography, photographs & computer art
29
580 - Plants (Botany)
27
791 - Public performances
26
658 - General management
16
398 - Folklore
15
540 - Chemistry & allied sciences
13
590 - Animals (Zoology)
12
520 - Astronomy & allied sciences
10
657 - Accounting
8
160 - Logic
7
920 - Biography, genealogy & insignia
6
more ...