Classification
320 - Political science
330 - Economics
425
340 - Law
49
900 - History & geography
38
333 - Economics of land & energy
33
700 - The arts; fine & decorative arts
29
600 - Technology
26
363 - Other social problems & services
24
000 - Computer science, information & general works
18
380 - Commerce, communications & transportation
14
610 - Medicine & health
13
140 - Specific philosophical schools
12
370 - Education
12
576 - Genetics & evolution
12
620 - Engineering & allied operations
12
500 - Natural sciences & mathematics
11
551 - Geology, hydrology & meteorology
9
300 - Social sciences
8
720 - Architecture
6
410 - Linguistics
5
400 - Language
4
581 - Specific topics in natural history
4
100 - Philosophy & psychology
3
170 - Ethics
3
630 - Agriculture & related technologies
3
304 - Factors affecting social behavior
2
361 - Social problems & social welfare in general
2
550 - Earth sciences
2
658 - General management
2
800 - Literature & rhetoric
2
200 - Religion
1
301 - Sociology & anthropology
1
530 - Physics
1
540 - Chemistry & allied sciences
1
580 - Plants (Botany)
1
657 - Accounting
1
920 - Biography, genealogy & insignia
1