Classification
320 - Political science
330 - Economics
1,060
300 - Social sciences
195
900 - History & geography
172
340 - Law
131
333 - Economics of land & energy
115
630 - Agriculture & related technologies
108
700 - The arts; fine & decorative arts
66
304 - Factors affecting social behavior
26
600 - Technology
26
363 - Other social problems & services
23
380 - Commerce, communications & transportation
18
610 - Medicine & health
18
370 - Education
15
000 - Computer science, information & general works
12
100 - Philosophy & psychology
12
140 - Specific philosophical schools
12
800 - Literature & rhetoric
10
576 - Genetics & evolution
8
500 - Natural sciences & mathematics
7
400 - Language
6
410 - Linguistics
5
551 - Geology, hydrology & meteorology
5
170 - Ethics
4
336 - Public finance
4
550 - Earth sciences
4
620 - Engineering & allied operations
4
200 - Religion
3
301 - Sociology & anthropology
3
361 - Social problems & social welfare in general
3
414 - Phonology & phonetics
3
657 - Accounting
3
780 - Music
3
323 - Civil & political rights
2
530 - Physics
2
581 - Specific topics in natural history
2
120 - Epistemology, causation & humankind
1
160 - Logic
1
296 - Judaism
1
297 - Islam, Babism & Bahai Faith
1
303 - Social processes
1
398 - Folklore
1
540 - Chemistry & allied sciences
1
580 - Plants (Botany)
1
658 - General management
1
720 - Architecture
1
940 - History of Europe
1
945 - Italian Peninsula & adjacent islands
1