Classification
363 - Other social problems & services
2
370 - Education
380 - Commerce, communications & transportation
2
610 - Medicine & health
620 - Engineering & allied operations
2
658 - General management
700 - The arts; fine & decorative arts
2
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
330 - Economics
1
333 - Economics of land & energy
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
600 - Technology
1
800 - Literature & rhetoric
1
900 - History & geography
1