Classification
000 - Computer science, information & general works
15
333 - Economics of land & energy
13
600 - Technology
13
700 - The arts; fine & decorative arts
12
620 - Engineering & allied operations
10
900 - History & geography
9
380 - Commerce, communications & transportation
8
540 - Chemistry & allied sciences
6
530 - Physics
5
363 - Other social problems & services
4
500 - Natural sciences & mathematics
4
340 - Law
3
330 - Economics
2
576 - Genetics & evolution
2
580 - Plants (Botany)
2
610 - Medicine & health
2
140 - Specific philosophical schools
1
300 - Social sciences
1
304 - Factors affecting social behavior
1
414 - Phonology & phonetics
1
551 - Geology, hydrology & meteorology
1
800 - Literature & rhetoric
1