Classification
100 - Philosophy & psychology
370 - Education
5
500 - Natural sciences & mathematics
4
140 - Specific philosophical schools
3
600 - Technology
3
610 - Medicine & health
3
320 - Political science
2
330 - Economics
2
620 - Engineering & allied operations
2
657 - Accounting
2
720 - Architecture
2
800 - Literature & rhetoric
2
000 - Computer science, information & general works
1
297 - Islam, Babism & Bahai Faith
1
300 - Social sciences
1
304 - Factors affecting social behavior
1
333 - Economics of land & energy
1
380 - Commerce, communications & transportation
1
400 - Language
1
550 - Earth sciences
1
581 - Specific topics in natural history
1
700 - The arts; fine & decorative arts
1
900 - History & geography
1