Classification
320 - Political science
500 - Natural sciences & mathematics
600 - Technology
620 - Engineering & allied operations
380 - Commerce, communications & transportation
6
700 - The arts; fine & decorative arts
6
900 - History & geography
6
363 - Other social problems & services
5
140 - Specific philosophical schools
4
333 - Economics of land & energy
4
300 - Social sciences
3
340 - Law
3
370 - Education
3
576 - Genetics & evolution
3
720 - Architecture
3
000 - Computer science, information & general works
2
330 - Economics
2
540 - Chemistry & allied sciences
2
630 - Agriculture & related technologies
2
100 - Philosophy & psychology
1
400 - Language
1
414 - Phonology & phonetics
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
610 - Medicine & health
1