Classification
000 - Computer science, information & general works
363 - Other social problems & services
140 - Specific philosophical schools
2
330 - Economics
2
333 - Economics of land & energy
2
600 - Technology
2
700 - The arts; fine & decorative arts
2
900 - History & geography
2
160 - Logic
1
370 - Education
1
380 - Commerce, communications & transportation
1
410 - Linguistics
1
500 - Natural sciences & mathematics
1
620 - Engineering & allied operations
1