Classification
333 - Economics of land & energy
600 - Technology
15
620 - Engineering & allied operations
13
363 - Other social problems & services
12
551 - Geology, hydrology & meteorology
11
700 - The arts; fine & decorative arts
11
000 - Computer science, information & general works
10
900 - History & geography
9
330 - Economics
5
610 - Medicine & health
5
630 - Agriculture & related technologies
5
320 - Political science
4
580 - Plants (Botany)
4
414 - Phonology & phonetics
3
576 - Genetics & evolution
3
800 - Literature & rhetoric
3
340 - Law
2
380 - Commerce, communications & transportation
2
140 - Specific philosophical schools
1
304 - Factors affecting social behavior
1
540 - Chemistry & allied sciences
1
581 - Specific topics in natural history
1