Classification
000 - Computer science, information & general works
2
140 - Specific philosophical schools
2
160 - Logic
1
330 - Economics
333 - Economics of land & energy
2
363 - Other social problems & services
3
370 - Education
380 - Commerce, communications & transportation
3
410 - Linguistics
2
500 - Natural sciences & mathematics
1
600 - Technology
2
610 - Medicine & health
2
700 - The arts; fine & decorative arts
900 - History & geography
1