Classification
330 - Economics
363 - Other social problems & services
600 - Technology
700 - The arts; fine & decorative arts
900 - History & geography
620 - Engineering & allied operations
43
333 - Economics of land & energy
31
380 - Commerce, communications & transportation
20
000 - Computer science, information & general works
13
320 - Political science
10
370 - Education
10
140 - Specific philosophical schools
9
551 - Geology, hydrology & meteorology
8
610 - Medicine & health
8
720 - Architecture
8
580 - Plants (Botany)
7
800 - Literature & rhetoric
5
658 - General management
4
400 - Language
3
304 - Factors affecting social behavior
2
576 - Genetics & evolution
2
581 - Specific topics in natural history
2
630 - Agriculture & related technologies
2
200 - Religion
1
300 - Social sciences
1
301 - Sociology & anthropology
1
340 - Law
1
360 - Social problems & services; associations
1
414 - Phonology & phonetics
1
530 - Physics
1
540 - Chemistry & allied sciences
1
615 - Pharmacology & therapeutics
1