Classification
900 - History & geography
300 - Social sciences
207
320 - Political science
199
800 - Literature & rhetoric
189
700 - The arts; fine & decorative arts
175
200 - Religion
119
100 - Philosophy & psychology
84
330 - Economics
84
400 - Language
80
140 - Specific philosophical schools
76
301 - Sociology & anthropology
75
340 - Law
53
380 - Commerce, communications & transportation
47
610 - Medicine & health
47
410 - Linguistics
45
370 - Education
39
780 - Music
35
333 - Economics of land & energy
33
600 - Technology
32
297 - Islam, Babism & Bahai Faith
29
363 - Other social problems & services
28
296 - Judaism
27
576 - Genetics & evolution
26
000 - Computer science, information & general works
21
620 - Engineering & allied operations
21
720 - Architecture
21
170 - Ethics
20
304 - Factors affecting social behavior
20
791 - Public performances
15
630 - Agriculture & related technologies
14
500 - Natural sciences & mathematics
11
581 - Specific topics in natural history
10
770 - Photography, photographs & computer art
9
350 - Public administration & military science
7
530 - Physics
7
361 - Social problems & social welfare in general
6
364 - Criminology
6
398 - Folklore
6
551 - Geology, hydrology & meteorology
6
120 - Epistemology, causation & humankind
5
414 - Phonology & phonetics
4
920 - Biography, genealogy & insignia
4
658 - General management
3
540 - Chemistry & allied sciences
2
580 - Plants (Botany)
2
160 - Logic
1
360 - Social problems & services; associations
1
520 - Astronomy & allied sciences
1
550 - Earth sciences
1
590 - Animals (Zoology)
1
more ...