Classification
600 - Technology
19
700 - The arts; fine & decorative arts
16
620 - Engineering & allied operations
15
900 - History & geography
12
333 - Economics of land & energy
11
000 - Computer science, information & general works
10
540 - Chemistry & allied sciences
7
414 - Phonology & phonetics
5
363 - Other social problems & services
4
580 - Plants (Botany)
4
610 - Medicine & health
3
380 - Commerce, communications & transportation
2
800 - Literature & rhetoric
2
140 - Specific philosophical schools
1
304 - Factors affecting social behavior
1
330 - Economics
1
500 - Natural sciences & mathematics
1
530 - Physics
1
650 - Management & auxiliary services
1