Classification
000 - Computer science, information & general works
1
333 - Economics of land & energy
3
363 - Other social problems & services
1
380 - Commerce, communications & transportation
2
530 - Physics
2
576 - Genetics & evolution
2
600 - Technology
2
620 - Engineering & allied operations
1
650 - Management & auxiliary services
700 - The arts; fine & decorative arts
2
900 - History & geography
2