Classification
414 - Phonology & phonetics
600 - Technology
700 - The arts; fine & decorative arts
30
620 - Engineering & allied operations
26
900 - History & geography
21
333 - Economics of land & energy
18
580 - Plants (Botany)
12
000 - Computer science, information & general works
8
363 - Other social problems & services
7
576 - Genetics & evolution
7
610 - Medicine & health
7
330 - Economics
5
340 - Law
5
380 - Commerce, communications & transportation
5
304 - Factors affecting social behavior
2
500 - Natural sciences & mathematics
2
530 - Physics
2
540 - Chemistry & allied sciences
2
551 - Geology, hydrology & meteorology
2
630 - Agriculture & related technologies
2
720 - Architecture
2
140 - Specific philosophical schools
1
650 - Management & auxiliary services
1
800 - Literature & rhetoric
1