Classification
000 - Computer science, information & general works
320 - Political science
330 - Economics
380 - Commerce, communications & transportation
610 - Medicine & health
333 - Economics of land & energy
5
700 - The arts; fine & decorative arts
5
363 - Other social problems & services
4
600 - Technology
3
900 - History & geography
3
140 - Specific philosophical schools
2
370 - Education
2
551 - Geology, hydrology & meteorology
2
581 - Specific topics in natural history
2
720 - Architecture
2
200 - Religion
1
304 - Factors affecting social behavior
1
340 - Law
1
410 - Linguistics
1
550 - Earth sciences
1
576 - Genetics & evolution
1
620 - Engineering & allied operations
1
658 - General management
1