Classification
414 - Phonology & phonetics
700 - The arts; fine & decorative arts
18
333 - Economics of land & energy
17
620 - Engineering & allied operations
15
363 - Other social problems & services
14
000 - Computer science, information & general works
13
600 - Technology
13
576 - Genetics & evolution
11
900 - History & geography
11
580 - Plants (Botany)
10
380 - Commerce, communications & transportation
8
610 - Medicine & health
7
140 - Specific philosophical schools
6
540 - Chemistry & allied sciences
6
581 - Specific topics in natural history
6
551 - Geology, hydrology & meteorology
5
304 - Factors affecting social behavior
4
500 - Natural sciences & mathematics
4
612 - Human physiology
4
300 - Social sciences
3
330 - Economics
3
320 - Political science
2
340 - Law
2
370 - Education
1
400 - Language
1
530 - Physics
1