Classification
320 - Political science
576 - Genetics & evolution
330 - Economics
388
900 - History & geography
365
300 - Social sciences
56
700 - The arts; fine & decorative arts
32
363 - Other social problems & services
25
140 - Specific philosophical schools
23
333 - Economics of land & energy
21
600 - Technology
19
340 - Law
17
380 - Commerce, communications & transportation
16
000 - Computer science, information & general works
15
100 - Philosophy & psychology
10
620 - Engineering & allied operations
10
800 - Literature & rhetoric
8
551 - Geology, hydrology & meteorology
7
658 - General management
7
200 - Religion
6
304 - Factors affecting social behavior
6
370 - Education
5
500 - Natural sciences & mathematics
5
610 - Medicine & health
5
297 - Islam, Babism & Bahai Faith
4
301 - Sociology & anthropology
4
581 - Specific topics in natural history
4
791 - Public performances
4
630 - Agriculture & related technologies
3
720 - Architecture
3
410 - Linguistics
2
580 - Plants (Botany)
2
120 - Epistemology, causation & humankind
1
170 - Ethics
1
296 - Judaism
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
973 - United States
1