Classification
900 - History & geography
800 - Literature & rhetoric
309
320 - Political science
291
700 - The arts; fine & decorative arts
267
300 - Social sciences
261
200 - Religion
176
100 - Philosophy & psychology
131
140 - Specific philosophical schools
121
330 - Economics
111
400 - Language
106
301 - Sociology & anthropology
96
340 - Law
91
410 - Linguistics
76
370 - Education
68
610 - Medicine & health
65
380 - Commerce, communications & transportation
63
780 - Music
50
333 - Economics of land & energy
45
600 - Technology
45
576 - Genetics & evolution
40
720 - Architecture
38
297 - Islam, Babism & Bahai Faith
35
363 - Other social problems & services
34
296 - Judaism
32
170 - Ethics
30
304 - Factors affecting social behavior
28
620 - Engineering & allied operations
28
000 - Computer science, information & general works
25
500 - Natural sciences & mathematics
22
791 - Public performances
19
630 - Agriculture & related technologies
17
581 - Specific topics in natural history
12
770 - Photography, photographs & computer art
12
530 - Physics
9
551 - Geology, hydrology & meteorology
9
350 - Public administration & military science
8
398 - Folklore
8
120 - Epistemology, causation & humankind
7
361 - Social problems & social welfare in general
7
364 - Criminology
6
414 - Phonology & phonetics
6
540 - Chemistry & allied sciences
6
590 - Animals (Zoology)
6
580 - Plants (Botany)
4
920 - Biography, genealogy & insignia
4
658 - General management
3
880 - Hellenic literatures; classical Greek
2
160 - Logic
1
336 - Public finance
1
360 - Social problems & services; associations
1
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