Classification
140 - Specific philosophical schools
2
380 - Commerce, communications & transportation
612 - Human physiology
000 - Computer science, information & general works
1
100 - Philosophy & psychology
1
333 - Economics of land & energy
1
363 - Other social problems & services
1
600 - Technology
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
700 - The arts; fine & decorative arts
1
800 - Literature & rhetoric
1
900 - History & geography
1