Classification
700 - The arts; fine & decorative arts
31
610 - Medicine & health
22
600 - Technology
21
620 - Engineering & allied operations
17
000 - Computer science, information & general works
15
900 - History & geography
13
333 - Economics of land & energy
11
580 - Plants (Botany)
10
363 - Other social problems & services
8
140 - Specific philosophical schools
6
330 - Economics
6
380 - Commerce, communications & transportation
6
576 - Genetics & evolution
6
530 - Physics
5
551 - Geology, hydrology & meteorology
4
658 - General management
4
100 - Philosophy & psychology
2
400 - Language
2
500 - Natural sciences & mathematics
2
540 - Chemistry & allied sciences
2
615 - Pharmacology & therapeutics
2
720 - Architecture
2
170 - Ethics
1
370 - Education
1
520 - Astronomy & allied sciences
1
581 - Specific topics in natural history
1
612 - Human physiology
1
780 - Music
1
800 - Literature & rhetoric
1
808 - Rhetoric & collections of literature
1