Classification
140 - Specific philosophical schools
333 - Economics of land & energy
7
700 - The arts; fine & decorative arts
7
000 - Computer science, information & general works
6
600 - Technology
6
610 - Medicine & health
6
363 - Other social problems & services
5
620 - Engineering & allied operations
4
330 - Economics
3
320 - Political science
2
540 - Chemistry & allied sciences
2
581 - Specific topics in natural history
2
630 - Agriculture & related technologies
2
800 - Literature & rhetoric
2
900 - History & geography
2
100 - Philosophy & psychology
1
340 - Law
1
370 - Education
1
380 - Commerce, communications & transportation
1
414 - Phonology & phonetics
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
615 - Pharmacology & therapeutics
1
720 - Architecture
1