Classification
140 - Specific philosophical schools
330 - Economics
600 - Technology
700 - The arts; fine & decorative arts
800 - Literature & rhetoric
000 - Computer science, information & general works
1
363 - Other social problems & services
1
380 - Commerce, communications & transportation
1
576 - Genetics & evolution
1
620 - Engineering & allied operations
1
900 - History & geography
1