Classification
333 - Economics of land & energy
7
600 - Technology
6
700 - The arts; fine & decorative arts
6
000 - Computer science, information & general works
3
414 - Phonology & phonetics
3
620 - Engineering & allied operations
3
500 - Natural sciences & mathematics
2
540 - Chemistry & allied sciences
2
580 - Plants (Botany)
2
610 - Medicine & health
2
900 - History & geography
2
140 - Specific philosophical schools
1
304 - Factors affecting social behavior
1
363 - Other social problems & services
1
530 - Physics
1