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