Classification
000 - Computer science, information & general works
170 - Ethics
600 - Technology
333 - Economics of land & energy
4
320 - Political science
3
330 - Economics
3
370 - Education
3
700 - The arts; fine & decorative arts
3
620 - Engineering & allied operations
2
300 - Social sciences
1
350 - Public administration & military science
1
363 - Other social problems & services
1
380 - Commerce, communications & transportation
1
500 - Natural sciences & mathematics
1
530 - Physics
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
610 - Medicine & health
1
630 - Agriculture & related technologies
1
657 - Accounting
1
800 - Literature & rhetoric
1
900 - History & geography
1