Classification
320 - Political science
500 - Natural sciences & mathematics
330 - Economics
89
000 - Computer science, information & general works
12
300 - Social sciences
12
700 - The arts; fine & decorative arts
12
363 - Other social problems & services
10
900 - History & geography
10
333 - Economics of land & energy
8
380 - Commerce, communications & transportation
8
600 - Technology
8
140 - Specific philosophical schools
7
370 - Education
7
551 - Geology, hydrology & meteorology
7
620 - Engineering & allied operations
7
340 - Law
6
610 - Medicine & health
6
576 - Genetics & evolution
5
100 - Philosophy & psychology
4
720 - Architecture
4
540 - Chemistry & allied sciences
3
400 - Language
2
414 - Phonology & phonetics
2
800 - Literature & rhetoric
2
170 - Ethics
1
304 - Factors affecting social behavior
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
368 - Insurance
1
410 - Linguistics
1
530 - Physics
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
657 - Accounting
1