Classification
900 - History & geography
2,234
320 - Political science
1,216
300 - Social sciences
930
700 - The arts; fine & decorative arts
762
330 - Economics
662
800 - Literature & rhetoric
657
100 - Philosophy & psychology
557
370 - Education
436
140 - Specific philosophical schools
423
410 - Linguistics
417
340 - Law
403
400 - Language
346
200 - Religion
331
301 - Sociology & anthropology
302
600 - Technology
301
333 - Economics of land & energy
268
380 - Commerce, communications & transportation
259
363 - Other social problems & services
238
610 - Medicine & health
203
620 - Engineering & allied operations
202
000 - Computer science, information & general works
168
720 - Architecture
153
304 - Factors affecting social behavior
144
170 - Ethics
117
780 - Music
115
630 - Agriculture & related technologies
98
297 - Islam, Babism & Bahai Faith
97
500 - Natural sciences & mathematics
94
791 - Public performances
94
581 - Specific topics in natural history
90
551 - Geology, hydrology & meteorology
78
576 - Genetics & evolution
69
530 - Physics
66
361 - Social problems & social welfare in general
62
350 - Public administration & military science
58
296 - Judaism
54
414 - Phonology & phonetics
50
360 - Social problems & services; associations
40
540 - Chemistry & allied sciences
40
580 - Plants (Botany)
36
364 - Criminology
31
770 - Photography, photographs & computer art
28
120 - Epistemology, causation & humankind
27
398 - Folklore
15
590 - Animals (Zoology)
15
520 - Astronomy & allied sciences
12
658 - General management
12
657 - Accounting
9
160 - Logic
6
612 - Human physiology
6
more ...