Classification
330 - Economics
363 - Other social problems & services
600 - Technology
700 - The arts; fine & decorative arts
900 - History & geography
620 - Engineering & allied operations
40
333 - Economics of land & energy
28
380 - Commerce, communications & transportation
19
000 - Computer science, information & general works
13
320 - Political science
10
370 - Education
9
720 - Architecture
8
140 - Specific philosophical schools
7
551 - Geology, hydrology & meteorology
7
580 - Plants (Botany)
7
610 - Medicine & health
7
800 - Literature & rhetoric
5
658 - General management
4
400 - Language
3
576 - Genetics & evolution
2
581 - Specific topics in natural history
2
200 - Religion
1
304 - Factors affecting social behavior
1
340 - Law
1
360 - Social problems & services; associations
1
530 - Physics
1
615 - Pharmacology & therapeutics
1