Classification
900 - History & geography
1,338
320 - Political science
778
300 - Social sciences
565
700 - The arts; fine & decorative arts
490
330 - Economics
446
100 - Philosophy & psychology
363
800 - Literature & rhetoric
321
140 - Specific philosophical schools
311
301 - Sociology & anthropology
239
370 - Education
237
400 - Language
222
200 - Religion
218
600 - Technology
210
333 - Economics of land & energy
208
410 - Linguistics
202
340 - Law
194
363 - Other social problems & services
181
380 - Commerce, communications & transportation
166
620 - Engineering & allied operations
142
610 - Medicine & health
119
000 - Computer science, information & general works
109
304 - Factors affecting social behavior
97
720 - Architecture
89
791 - Public performances
84
780 - Music
82
170 - Ethics
81
297 - Islam, Babism & Bahai Faith
76
500 - Natural sciences & mathematics
69
581 - Specific topics in natural history
66
551 - Geology, hydrology & meteorology
61
630 - Agriculture & related technologies
61
530 - Physics
49
296 - Judaism
48
576 - Genetics & evolution
48
361 - Social problems & social welfare in general
36
350 - Public administration & military science
35
414 - Phonology & phonetics
35
364 - Criminology
27
120 - Epistemology, causation & humankind
22
540 - Chemistry & allied sciences
22
770 - Photography, photographs & computer art
22
360 - Social problems & services; associations
19
580 - Plants (Botany)
16
398 - Folklore
11
520 - Astronomy & allied sciences
8
590 - Animals (Zoology)
7
160 - Logic
6
612 - Human physiology
5
658 - General management
5
920 - Biography, genealogy & insignia
5
more ...