Classification
380 - Commerce, communications & transportation
500 - Natural sciences & mathematics
610 - Medicine & health
333 - Economics of land & energy
11
700 - The arts; fine & decorative arts
11
000 - Computer science, information & general works
10
600 - Technology
10
620 - Engineering & allied operations
9
140 - Specific philosophical schools
7
576 - Genetics & evolution
7
363 - Other social problems & services
6
612 - Human physiology
6
300 - Social sciences
5
540 - Chemistry & allied sciences
5
580 - Plants (Botany)
5
900 - History & geography
5
330 - Economics
4
414 - Phonology & phonetics
3
551 - Geology, hydrology & meteorology
3
581 - Specific topics in natural history
3
340 - Law
2
410 - Linguistics
2
658 - General management
2
320 - Political science
1
370 - Education
1
400 - Language
1
615 - Pharmacology & therapeutics
1