Classification
000 - Computer science, information & general works
11
100 - Philosophy & psychology
1
140 - Specific philosophical schools
5
300 - Social sciences
3
320 - Political science
2
330 - Economics
2
333 - Economics of land & energy
10
361 - Social problems & social welfare in general
1
363 - Other social problems & services
159
380 - Commerce, communications & transportation
11
414 - Phonology & phonetics
4
500 - Natural sciences & mathematics
4
530 - Physics
1
540 - Chemistry & allied sciences
3
551 - Geology, hydrology & meteorology
576 - Genetics & evolution
4
580 - Plants (Botany)
6
581 - Specific topics in natural history
3
600 - Technology
4
610 - Medicine & health
9
612 - Human physiology
5
620 - Engineering & allied operations
5
630 - Agriculture & related technologies
1
700 - The arts; fine & decorative arts
11
800 - Literature & rhetoric
1
900 - History & geography
2