Classification
414 - Phonology & phonetics
620 - Engineering & allied operations
700 - The arts; fine & decorative arts
600 - Technology
21
900 - History & geography
17
333 - Economics of land & energy
10
363 - Other social problems & services
8
580 - Plants (Botany)
7
576 - Genetics & evolution
6
000 - Computer science, information & general works
3
540 - Chemistry & allied sciences
3
610 - Medicine & health
3
140 - Specific philosophical schools
2
304 - Factors affecting social behavior
2
340 - Law
2
380 - Commerce, communications & transportation
2
330 - Economics
1
530 - Physics
1
612 - Human physiology
1
630 - Agriculture & related technologies
1