Classification
900 - History & geography
330 - Economics
27
320 - Political science
23
657 - Accounting
9
600 - Technology
8
700 - The arts; fine & decorative arts
8
333 - Economics of land & energy
7
340 - Law
7
620 - Engineering & allied operations
7
363 - Other social problems & services
5
380 - Commerce, communications & transportation
5
140 - Specific philosophical schools
4
000 - Computer science, information & general works
3
370 - Education
3
800 - Literature & rhetoric
3
300 - Social sciences
2
610 - Medicine & health
2
720 - Architecture
2
100 - Philosophy & psychology
1
120 - Epistemology, causation & humankind
1
200 - Religion
1
301 - Sociology & anthropology
1
400 - Language
1
414 - Phonology & phonetics
1
540 - Chemistry & allied sciences
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
630 - Agriculture & related technologies
1
658 - General management
1