Classification
320 - Political science
576 - Genetics & evolution
330 - Economics
1,364
900 - History & geography
1,351
300 - Social sciences
443
340 - Law
198
700 - The arts; fine & decorative arts
45
363 - Other social problems & services
26
140 - Specific philosophical schools
23
100 - Philosophy & psychology
22
333 - Economics of land & energy
22
600 - Technology
19
380 - Commerce, communications & transportation
18
200 - Religion
17
000 - Computer science, information & general works
15
620 - Engineering & allied operations
10
551 - Geology, hydrology & meteorology
9
800 - Literature & rhetoric
9
304 - Factors affecting social behavior
7
370 - Education
7
658 - General management
7
610 - Medicine & health
6
630 - Agriculture & related technologies
6
301 - Sociology & anthropology
5
500 - Natural sciences & mathematics
5
581 - Specific topics in natural history
5
297 - Islam, Babism & Bahai Faith
4
791 - Public performances
4
943 - Central Europe; Germany
4
720 - Architecture
3
170 - Ethics
2
410 - Linguistics
2
580 - Plants (Botany)
2
780 - Music
2
120 - Epistemology, causation & humankind
1
280 - Christian denominations & sects
1
296 - Judaism
1
322 - Relation of state to organized groups
1
343 - Military, tax, trade & industrial law
1
350 - Public administration & military science
1
361 - Social problems & social welfare in general
1
400 - Language
1
414 - Phonology & phonetics
1
530 - Physics
1
540 - Chemistry & allied sciences
1
657 - Accounting
1
920 - Biography, genealogy & insignia
1
940 - History of Europe
1
973 - United States
1