Classification
000 - Computer science, information & general works
2
140 - Specific philosophical schools
330 - Economics
380 - Commerce, communications & transportation
576 - Genetics & evolution
600 - Technology
620 - Engineering & allied operations
2
700 - The arts; fine & decorative arts
900 - History & geography
333 - Economics of land & energy
1
363 - Other social problems & services
1
500 - Natural sciences & mathematics
1
610 - Medicine & health
1
658 - General management
1
720 - Architecture
1