Classification
414 - Phonology & phonetics
700 - The arts; fine & decorative arts
12
333 - Economics of land & energy
9
000 - Computer science, information & general works
8
500 - Natural sciences & mathematics
8
100 - Philosophy & psychology
7
600 - Technology
7
330 - Economics
6
400 - Language
6
380 - Commerce, communications & transportation
5
610 - Medicine & health
5
620 - Engineering & allied operations
5
900 - History & geography
5
320 - Political science
4
551 - Geology, hydrology & meteorology
4
580 - Plants (Botany)
4
140 - Specific philosophical schools
3
581 - Specific topics in natural history
3
363 - Other social problems & services
2
576 - Genetics & evolution
2
720 - Architecture
2
170 - Ethics
1
370 - Education
1
530 - Physics
1
540 - Chemistry & allied sciences
1
612 - Human physiology
1
615 - Pharmacology & therapeutics
1