Classification
333 - Economics of land & energy
12
600 - Technology
11
900 - History & geography
8
620 - Engineering & allied operations
7
700 - The arts; fine & decorative arts
7
000 - Computer science, information & general works
6
330 - Economics
6
530 - Physics
4
380 - Commerce, communications & transportation
3
580 - Plants (Botany)
3
414 - Phonology & phonetics
2
576 - Genetics & evolution
2
100 - Philosophy & psychology
1
304 - Factors affecting social behavior
1
363 - Other social problems & services
1
551 - Geology, hydrology & meteorology
1
610 - Medicine & health
1