Classification
500 - Natural sciences & mathematics
700 - The arts; fine & decorative arts
14
000 - Computer science, information & general works
12
333 - Economics of land & energy
8
600 - Technology
8
620 - Engineering & allied operations
8
610 - Medicine & health
6
140 - Specific philosophical schools
5
363 - Other social problems & services
5
414 - Phonology & phonetics
5
540 - Chemistry & allied sciences
5
580 - Plants (Botany)
5
380 - Commerce, communications & transportation
4
576 - Genetics & evolution
4
581 - Specific topics in natural history
4
612 - Human physiology
4
300 - Social sciences
3
520 - Astronomy & allied sciences
3
530 - Physics
3
551 - Geology, hydrology & meteorology
3
900 - History & geography
3
370 - Education
2
400 - Language
2
800 - Literature & rhetoric
2
340 - Law
1
535 - Light & infrared & ultraviolet phenomena
1
658 - General management
1