Classification
000 - Computer science, information & general works
140 - Specific philosophical schools
320 - Political science
1
330 - Economics
333 - Economics of land & energy
363 - Other social problems & services
370 - Education
1
380 - Commerce, communications & transportation
1
551 - Geology, hydrology & meteorology
1
600 - Technology
700 - The arts; fine & decorative arts
720 - Architecture
1