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