Classification
320 - Political science
330 - Economics
700 - The arts; fine & decorative arts
900 - History & geography
140 - Specific philosophical schools
2
333 - Economics of land & energy
2
000 - Computer science, information & general works
1
363 - Other social problems & services
1
370 - Education
1
380 - Commerce, communications & transportation
1
414 - Phonology & phonetics
1
551 - Geology, hydrology & meteorology
1
581 - Specific topics in natural history
1
610 - Medicine & health
1
630 - Agriculture & related technologies
1
657 - Accounting
1
658 - General management
1
800 - Literature & rhetoric
1