Classification
320 - Political science
330 - Economics
429
340 - Law
50
900 - History & geography
40
333 - Economics of land & energy
34
700 - The arts; fine & decorative arts
30
600 - Technology
27
363 - Other social problems & services
25
000 - Computer science, information & general works
18
380 - Commerce, communications & transportation
16
610 - Medicine & health
13
370 - Education
12
576 - Genetics & evolution
12
620 - Engineering & allied operations
12
140 - Specific philosophical schools
11
500 - Natural sciences & mathematics
11
551 - Geology, hydrology & meteorology
9
300 - Social sciences
8
720 - Architecture
6
410 - Linguistics
5
170 - Ethics
4
400 - Language
4
581 - Specific topics in natural history
4
100 - Philosophy & psychology
3
304 - Factors affecting social behavior
3
630 - Agriculture & related technologies
3
361 - Social problems & social welfare in general
2
540 - Chemistry & allied sciences
2
550 - Earth sciences
2
658 - General management
2
800 - Literature & rhetoric
2
200 - Religion
1
301 - Sociology & anthropology
1
350 - Public administration & military science
1
530 - Physics
1
580 - Plants (Botany)
1
657 - Accounting
1
920 - Biography, genealogy & insignia
1