Classification
414 - Phonology & phonetics
620 - Engineering & allied operations
700 - The arts; fine & decorative arts
600 - Technology
22
900 - History & geography
16
333 - Economics of land & energy
14
580 - Plants (Botany)
12
363 - Other social problems & services
9
576 - Genetics & evolution
9
610 - Medicine & health
8
000 - Computer science, information & general works
7
380 - Commerce, communications & transportation
5
140 - Specific philosophical schools
4
340 - Law
4
500 - Natural sciences & mathematics
4
540 - Chemistry & allied sciences
4
551 - Geology, hydrology & meteorology
4
300 - Social sciences
3
330 - Economics
3
581 - Specific topics in natural history
3
612 - Human physiology
3
304 - Factors affecting social behavior
2
630 - Agriculture & related technologies
2
720 - Architecture
2
530 - Physics
1