Classification
320 - Political science
340 - Law
900 - History & geography
330 - Economics
230
300 - Social sciences
35
700 - The arts; fine & decorative arts
25
100 - Philosophy & psychology
23
140 - Specific philosophical schools
17
200 - Religion
16
600 - Technology
15
333 - Economics of land & energy
11
363 - Other social problems & services
11
576 - Genetics & evolution
11
301 - Sociology & anthropology
10
620 - Engineering & allied operations
10
370 - Education
8
380 - Commerce, communications & transportation
8
170 - Ethics
7
400 - Language
6
800 - Literature & rhetoric
6
630 - Agriculture & related technologies
5
000 - Computer science, information & general works
4
297 - Islam, Babism & Bahai Faith
4
304 - Factors affecting social behavior
4
500 - Natural sciences & mathematics
4
720 - Architecture
4
120 - Epistemology, causation & humankind
3
361 - Social problems & social welfare in general
3
551 - Geology, hydrology & meteorology
3
296 - Judaism
2
410 - Linguistics
2
580 - Plants (Botany)
2
658 - General management
2
360 - Social problems & services; associations
1
364 - Criminology
1
398 - Folklore
1
414 - Phonology & phonetics
1
581 - Specific topics in natural history
1
610 - Medicine & health
1
657 - Accounting
1
770 - Photography, photographs & computer art
1
780 - Music
1
791 - Public performances
1
940 - History of Europe
1