Classification
400 - Language
600 - Technology
620 - Engineering & allied operations
8
000 - Computer science, information & general works
7
330 - Economics
7
333 - Economics of land & energy
7
700 - The arts; fine & decorative arts
7
363 - Other social problems & services
6
900 - History & geography
5
370 - Education
4
720 - Architecture
4
140 - Specific philosophical schools
3
380 - Commerce, communications & transportation
3
576 - Genetics & evolution
3
320 - Political science
2
610 - Medicine & health
2
300 - Social sciences
1
340 - Law
1
410 - Linguistics
1
414 - Phonology & phonetics
1
500 - Natural sciences & mathematics
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
658 - General management
1