Classification
170 - Ethics
900 - History & geography
100 - Philosophy & psychology
73
320 - Political science
40
140 - Specific philosophical schools
37
200 - Religion
30
700 - The arts; fine & decorative arts
28
800 - Literature & rhetoric
23
600 - Technology
18
610 - Medicine & health
17
330 - Economics
16
300 - Social sciences
15
333 - Economics of land & energy
15
370 - Education
15
340 - Law
13
363 - Other social problems & services
11
620 - Engineering & allied operations
10
410 - Linguistics
9
000 - Computer science, information & general works
8
120 - Epistemology, causation & humankind
8
301 - Sociology & anthropology
8
581 - Specific topics in natural history
7
400 - Language
6
380 - Commerce, communications & transportation
5
551 - Geology, hydrology & meteorology
5
576 - Genetics & evolution
5
720 - Architecture
5
530 - Physics
4
780 - Music
4
297 - Islam, Babism & Bahai Faith
3
304 - Factors affecting social behavior
3
361 - Social problems & social welfare in general
3
500 - Natural sciences & mathematics
3
580 - Plants (Botany)
3
160 - Logic
2
414 - Phonology & phonetics
2
520 - Astronomy & allied sciences
2
630 - Agriculture & related technologies
2
770 - Photography, photographs & computer art
2
791 - Public performances
2
296 - Judaism
1
398 - Folklore
1
612 - Human physiology
1
658 - General management
1
880 - Hellenic literatures; classical Greek
1