Classification
140 - Specific philosophical schools
900 - History & geography
121
320 - Political science
90
100 - Philosophy & psychology
73
300 - Social sciences
71
700 - The arts; fine & decorative arts
63
340 - Law
53
170 - Ethics
47
330 - Economics
36
333 - Economics of land & energy
33
800 - Literature & rhetoric
33
200 - Religion
31
363 - Other social problems & services
30
301 - Sociology & anthropology
28
600 - Technology
27
380 - Commerce, communications & transportation
22
610 - Medicine & health
21
410 - Linguistics
18
620 - Engineering & allied operations
18
370 - Education
16
581 - Specific topics in natural history
16
304 - Factors affecting social behavior
14
500 - Natural sciences & mathematics
14
000 - Computer science, information & general works
13
720 - Architecture
12
551 - Geology, hydrology & meteorology
11
780 - Music
10
400 - Language
7
361 - Social problems & social welfare in general
6
576 - Genetics & evolution
6
590 - Animals (Zoology)
5
630 - Agriculture & related technologies
4
120 - Epistemology, causation & humankind
3
297 - Islam, Babism & Bahai Faith
3
360 - Social problems & services; associations
3
364 - Criminology
3
540 - Chemistry & allied sciences
3
580 - Plants (Botany)
3
350 - Public administration & military science
2
530 - Physics
2
880 - Hellenic literatures; classical Greek
2
160 - Logic
1
296 - Judaism
1
414 - Phonology & phonetics
1
658 - General management
1
770 - Photography, photographs & computer art
1
791 - Public performances
1