Classification
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
160 - Logic
1
330 - Economics
333 - Economics of land & energy
1
363 - Other social problems & services
370 - Education
1
380 - Commerce, communications & transportation
410 - Linguistics
1
500 - Natural sciences & mathematics
1
551 - Geology, hydrology & meteorology
1
600 - Technology
620 - Engineering & allied operations
1
700 - The arts; fine & decorative arts
1
900 - History & geography
1