Classification
100 - Philosophy & psychology
410 - Linguistics
400 - Language
49
900 - History & geography
36
200 - Religion
20
140 - Specific philosophical schools
19
800 - Literature & rhetoric
19
170 - Ethics
15
370 - Education
15
320 - Political science
14
300 - Social sciences
13
700 - The arts; fine & decorative arts
13
380 - Commerce, communications & transportation
11
000 - Computer science, information & general works
7
301 - Sociology & anthropology
7
333 - Economics of land & energy
7
600 - Technology
7
500 - Natural sciences & mathematics
6
330 - Economics
5
530 - Physics
5
340 - Law
4
576 - Genetics & evolution
4
620 - Engineering & allied operations
4
780 - Music
4
120 - Epistemology, causation & humankind
3
363 - Other social problems & services
3
414 - Phonology & phonetics
3
160 - Logic
2
580 - Plants (Botany)
2
610 - Medicine & health
2
770 - Photography, photographs & computer art
2
880 - Hellenic literatures; classical Greek
2
121 - Epistemology
1
296 - Judaism
1
297 - Islam, Babism & Bahai Faith
1
304 - Factors affecting social behavior
1
540 - Chemistry & allied sciences
1
581 - Specific topics in natural history
1
630 - Agriculture & related technologies
1
720 - Architecture
1
801 - Philosophy & theory
1
808 - Rhetoric & collections of literature
1