Classification
500 - Natural sciences & mathematics
600 - Technology
10
620 - Engineering & allied operations
10
900 - History & geography
8
700 - The arts; fine & decorative arts
7
333 - Economics of land & energy
5
000 - Computer science, information & general works
3
330 - Economics
3
363 - Other social problems & services
3
414 - Phonology & phonetics
3
580 - Plants (Botany)
3
610 - Medicine & health
3
340 - Law
2
540 - Chemistry & allied sciences
2
576 - Genetics & evolution
2
380 - Commerce, communications & transportation
1
400 - Language
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
658 - General management
1
660 - Chemical engineering
1
780 - Music
1